fix dangermode

removed old setrx/settx stuff

AFSK.cpp

@@ -0,0 +1,738 @@
+#include <Arduino.h>
+#include "HamShield.h"
+#include "SimpleFIFO.h"
+#include <util/atomic.h>
+
+#define PHASE_BIT 8
+#define PHASE_INC 1
+
+#define PHASE_MAX (SAMPLEPERBIT * PHASE_BIT)
+#define PHASE_THRES (PHASE_MAX / 2)
+
+#define BIT_DIFFER(bitline1, bitline2) (((bitline1) ^ (bitline2)) & 0x01)
+#define EDGE_FOUND(bitline)            BIT_DIFFER((bitline), (bitline) >> 1)
+
+#define PPOOL_SIZE 2
+
+#define AFSK_SPACE 2200
+#define AFSK_MARK  1200
+
+// Timers
+volatile unsigned long lastTx = 0;
+volatile unsigned long lastTxEnd = 0;
+volatile unsigned long lastRx = 0;
+
+#define T_BIT ((unsigned int)(SAMPLERATE/BITRATE))
+
+#ifdef PACKET_PREALLOCATE
+SimpleFIFO<AFSK::Packet *,PPOOL_SIZE> preallocPool;
+AFSK::Packet preallocPackets[PPOOL_SIZE];
+#endif
+
+void AFSK::Encoder::process() {
+  // We're on the start of a byte position, so fetch one
+  if(bitPosition == 0) {
+    if(preamble) { // Still in preamble
+      currentByte = HDLC_PREAMBLE;
+      --preamble; // Decrement by one
+    } else {
+      if(!packet) { // We aren't on a packet, grab one
+        // Unless we already sent enough
+        if(maxTx-- == 0) {
+          stop();
+          lastTxEnd = millis();
+          return;
+        }
+        packet = pBuf.getPacket();
+        if(!packet) { // There actually weren't any
+          stop(); // Stop transmitting and return
+          lastTxEnd = millis();
+          return;
+        }
+        lastTx = millis();
+        currentBytePos = 0;
+        nextByte = HDLC_FRAME; // Our next output should be a frame boundary
+        hdlc = true;
+      }
+  
+      // We ran out of actual data, provide an HDLC frame (idle)
+      if(currentBytePos == packet->len && nextByte == 0) {
+        // We also get here if nextByte isn't set, to handle empty frames
+        pBuf.freePacket(packet);
+        packet = pBuf.getPacket(); // Get the next, if any
+        //packet = NULL;
+        currentBytePos = 0;
+        nextByte = 0;
+        currentByte = HDLC_FRAME;
+        hdlc = true;
+      } else {
+        if(nextByte) {
+          // We queued up something other than the actual stream to be sent next
+          currentByte = nextByte;
+          nextByte = 0;
+        } else {
+          // Get the next byte to send, but if it's an HDLC frame, escape it
+          // and queue the real byte for the next cycle.
+          currentByte = packet->getByte();
+          if(currentByte == HDLC_FRAME) {
+            nextByte = currentByte;
+            currentByte = HDLC_ESCAPE;
+          } else {
+            currentBytePos++;
+          }
+          hdlc = false; // If we get here, it will be NRZI bit stuffed
+        }
+      }
+    }
+  }
+
+  // Pickup the last bit
+  currentBit = currentByte & 0x1;    
+
+  if(lastZero == 5) {
+    currentBit = 0; // Force a 0 bit output
+  } else {
+    currentByte >>= 1; // Bit shift it right, for the next round
+    ++bitPosition; // Note our increase in position
+  }
+
+  // To handle NRZI 5 bit stuffing, count the bits
+  if(!currentBit || hdlc)
+    lastZero = 0;
+  else
+    ++lastZero;
+
+  // NRZI and AFSK uses toggling 0s, "no change" on 1
+  // So, if not a 1, toggle to the opposite tone
+  if(!currentBit)
+    currentTone = !currentTone;
+  
+  if(currentTone == 0) {
+    PORTD |= _BV(7);
+    dds->setFrequency(AFSK_SPACE);
+  } else {
+    PORTD &= ~_BV(7);
+    dds->setFrequency(AFSK_MARK);
+  }
+}
+
+bool AFSK::Encoder::start() {
+  if(!done || sending) {
+    return false;
+  }
+  
+  if(randomWait > millis()) {
+    return false;
+  }
+  
+  // First real byte is a frame
+  currentBit = 0;
+  lastZero = 0;
+  bitPosition = 0;
+  //bitClock = 0;
+  preamble = 0b110000; // 6.7ms each, 23 = 153ms
+  done = false;
+  hdlc = true;
+  packet = 0x0; // No initial packet, find in the ISR
+  currentBytePos = 0;
+  maxTx = 3;
+  sending = true;
+  nextByte = 0;
+  dds->setFrequency(0);
+  dds->on();
+  return true;
+}
+
+void AFSK::Encoder::stop() {
+  randomWait = 0;
+  sending = false;
+  done = true;
+  dds->setFrequency(0);
+  dds->off();
+}
+
+AFSK::Decoder::Decoder() {
+  // Initialize the sampler delay line (phase shift)
+  //for(unsigned char i = 0; i < SAMPLEPERBIT/2; i++)
+  //  delay_fifo.enqueue(0);
+}
+
+bool AFSK::HDLCDecode::hdlcParse(bool bit, SimpleFIFO<uint8_t,HAMSHIELD_AFSK_RX_FIFO_LEN> *fifo) {
+  bool ret = true;
+  
+  demod_bits <<= 1;
+  demod_bits |= bit ? 1 : 0;
+  
+  // Flag
+  if(demod_bits == HDLC_FRAME) {
+    fifo->enqueue(HDLC_FRAME);
+    rxstart = true;
+    currchar = 0;
+    bit_idx = 0;
+    return ret;
+  }
+  
+  // Reset
+  if((demod_bits & HDLC_RESET) == HDLC_RESET) {
+    rxstart = false;
+    lastRx = millis();
+    return ret;
+  }
+  if(!rxstart) {
+    return ret;
+  }
+  
+  // Stuffed?
+  if((demod_bits & 0x3f) == 0x3e)
+    return ret;
+  
+  if(demod_bits & 0x01)
+    currchar |= 0x80;
+  
+  if(++bit_idx >= 8) {
+    if(currchar == HDLC_FRAME ||
+      currchar == HDLC_RESET ||
+      currchar == HDLC_ESCAPE) {
+        fifo->enqueue(HDLC_ESCAPE);
+      }
+    fifo->enqueue(currchar & 0xff);
+    currchar = 0;
+    bit_idx = 0;
+  } else {
+    currchar >>= 1;
+  }  
+
+  return ret;
+}
+
+template <typename T, int size>
+class FastRing {
+private:
+  T ring[size];
+  uint8_t position;
+public:
+  FastRing(): position(0) {}
+  inline void write(T value) {
+    ring[(position++) & (size-1)] = value;
+  }
+  inline T read() const {
+    return ring[position & (size-1)];
+  }
+  inline T readn(uint8_t n) const {
+    return ring[(position + (~n+1)) & (size-1)];
+  }
+};
+// Create a delay line that's half the length of the bit cycle (-90 degrees)
+FastRing<uint8_t,(T_BIT/2)> delayLine;
+
+// Handle the A/D converter interrupt (hopefully quickly :)
+void AFSK::Decoder::process(int8_t curr_sample) {
+  // Run the same through the phase multiplier and butterworth filter
+  iir_x[0] = iir_x[1];
+  iir_x[1] = ((int8_t)delayLine.read() * curr_sample) >> 2;
+  iir_y[0] = iir_y[1];
+  iir_y[1] = iir_x[0] + iir_x[1] + (iir_y[0] >> 1) + (iir_y[0]>>3) + (iir_y[0]>>5);
+  
+  // Place this ADC sample into the delay line
+  delayLine.write(curr_sample);
+
+  // Shift the bit into place based on the output of the discriminator
+  sampled_bits <<= 1;
+  sampled_bits |= (iir_y[1] > 0) ? 1 : 0;  
+  
+  // If we found a 0/1 transition, adjust phases to track
+  if(EDGE_FOUND(sampled_bits)) {
+    if(curr_phase < PHASE_THRES)
+      curr_phase += PHASE_INC;
+    else
+      curr_phase -= PHASE_INC;
+  }
+  
+  // Move ahead in phase
+  curr_phase += PHASE_BIT;
+  
+  // If we've gone over the phase maximum, we should now have some data
+  if(curr_phase >= PHASE_MAX) {
+    curr_phase %= PHASE_MAX;
+    found_bits <<= 1;
+    
+    // If we have 3 bits or more set, it's a positive bit
+    register uint8_t bits = sampled_bits & 0x07;
+    if(bits == 0x07 || bits == 0x06 || bits == 0x05 || bits == 0x03) {
+      found_bits |= 1;
+    }
+    
+    hdlc.hdlcParse(!EDGE_FOUND(found_bits), &rx_fifo); // Process it
+  }
+}
+  
+// This routine uses a pre-allocated Packet structure
+// to save on the memory requirements of the stream data
+bool AFSK::Decoder::read() {
+  bool retVal = false;
+  if(!currentPacket) { // We failed a prior memory allocation
+    currentPacket = pBuf.makePacket(PACKET_MAX_LEN);
+    if(!currentPacket) // Still nothing
+      return false;
+  }
+  // While we have AFSK receive FIFO bytes...
+  while(rx_fifo.count()) {
+    // Grab the character
+    char c = rx_fifo.dequeue();
+    bool escaped = false;
+    if(c == HDLC_ESCAPE) { // We received an escaped byte, mark it
+      escaped = true;
+      // Do we want to keep HDLC_ESCAPEs in the packet?
+      //currentPacket->append(HDLC_ESCAPE); // Append without FCS
+      c = rx_fifo.dequeue(); // Reset to the next character
+    }
+    
+    // Append all the bytes
+    // This will include unescaped HDLC_FRAME bytes
+    if(c != HDLC_FRAME || escaped) // Append frame if it is escaped
+      currentPacket->appendFCS(c); // Escaped characters and all else go into FCS
+    
+    if(currentPacket->len > PACKET_MAX_LEN) {
+      // We've now gone too far and picked up far too many bytes
+      // Cancel this frame, start back at the beginning
+      currentPacket->clear();
+      continue;
+    }
+    
+    // We have a frame boundary, if it isn't escaped
+    // If it's escaped, it was part of the data stream
+    if(c == HDLC_FRAME && !escaped) {
+      if(!currentPacket->len) {
+        currentPacket->clear(); // There wasn't any data, restart stream
+        continue;
+      } else {
+        // We have some bytes in stream, check it meets minimum payload length
+        // Min payload is 1 (flag) + 14 (addressing) + 2 (control/PID) + 1 (flag)
+        if(currentPacket->len >= 16) {          
+          // We should end up here with a valid FCS due to the appendFCS
+          if(currentPacket->crcOK()) { // Magic number for the CRC check passing
+            // Valid frame, so, let's filter for control + PID
+            // Maximum search distance is 71 bytes to end of the address fields
+            // Skip the HDLC frame start
+            bool filtered = false;
+            for(unsigned char i = 0; i < (currentPacket->len<70?currentPacket->len:71); ++i) {
+              if((currentPacket->getByte() & 0x1) == 0x1) { // Found a byte with LSB set
+                // which marks the final address payload
+                // next two bytes should be the control/PID
+                //if(currentPacket->getByte() == 0x03 && currentPacket->getByte() == 0xf0) {
+                  filtered = true;
+                  break; // Found it
+                //}
+              }
+            }
+            
+            if(!filtered) {
+              // Frame wasn't one we care about, discard
+              currentPacket->clear();
+              continue;
+            }
+            
+            // It's all done and formatted, ready to go
+            currentPacket->ready = 1;
+            if(!pBuf.putPacket(currentPacket)) // Put it in the receive FIFO
+              pBuf.freePacket(currentPacket); // Out of FIFO space, so toss it
+            
+            // Allocate a new one of maximum length
+            currentPacket = pBuf.makePacket(PACKET_MAX_LEN);
+            retVal = true;
+          }
+        }
+      }
+      // Restart the stream
+      currentPacket->clear();
+    }
+  }
+  return retVal; // This is true if we parsed a packet in this flow
+}
+  
+void AFSK::Decoder::start() {
+  // Do this in start to allocate our first packet
+  currentPacket = pBuf.makePacket(PACKET_MAX_LEN);
+/*  ASSR &= ~(_BV(EXCLK) | _BV(AS2));
+
+  // Do non-inverting PWM on pin OC2B (arduino pin 3) (p.159).
+  // OC2A (arduino pin 11) stays in normal port operation:
+  // COM2B1=1, COM2B0=0, COM2A1=0, COM2A0=0
+  // Mode 1 - Phase correct PWM
+  TCCR2A = (TCCR2A | _BV(COM2B1)) & ~(_BV(COM2B0) | _BV(COM2A1) | _BV(COM2A0)) |
+           _BV(WGM21) | _BV(WGM20);
+  // No prescaler (p.162)
+  TCCR2B = (TCCR2B & ~(_BV(CS22) | _BV(CS21))) | _BV(CS20) | _BV(WGM22);
+  
+  OCR2A = pow(2,COMPARE_BITS)-1;
+  OCR2B = 0;
+  // Configure the ADC and Timer1 to trigger automatic interrupts
+  TCCR1A = 0;
+  TCCR1B = _BV(CS11) | _BV(WGM13) | _BV(WGM12);
+  ICR1 = ((F_CPU / 8) / REFCLK) - 1;
+  ADMUX = _BV(REFS0) | _BV(ADLAR) | 0; // Channel 0, shift result left (ADCH used)
+  DDRC &= ~_BV(0);
+  PORTC &= ~_BV(0);
+  DIDR0 |= _BV(0);
+  ADCSRB = _BV(ADTS2) | _BV(ADTS1) | _BV(ADTS0);
+  ADCSRA = _BV(ADEN) | _BV(ADSC) | _BV(ADATE) | _BV(ADIE) | _BV(ADPS2); // | _BV(ADPS0);  */
+}
+  
+AFSK::PacketBuffer::PacketBuffer() {
+  nextPacketIn = 0;
+  nextPacketOut = 0;
+  inBuffer = 0;
+  for(unsigned char i = 0; i < PACKET_BUFFER_SIZE; ++i) {
+    packets[i] = 0x0;
+  }
+#ifdef PACKET_PREALLOCATE
+  for(unsigned char i = 0; i < PPOOL_SIZE; ++i) {
+    // Put some empty packets in the FIFO
+    preallocPool.enqueue(&preallocPackets[i]);
+  }
+#endif
+}
+
+unsigned char AFSK::PacketBuffer::readyCount() volatile {
+  unsigned char i;
+  unsigned int cnt = 0;
+  ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
+    for(i = 0; i < PACKET_BUFFER_SIZE; ++i) {
+      if(packets[i] && packets[i]->ready)
+        ++cnt;
+    }
+  }  
+  return cnt;
+}
+  
+// Return NULL on empty packet buffers
+AFSK::Packet *AFSK::PacketBuffer::getPacket() volatile {
+  unsigned char i = 0;
+  AFSK::Packet *p = NULL;
+  
+  ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
+    if(inBuffer == 0) {
+      return 0x0;
+    }
+    
+    do {
+      p = packets[nextPacketOut];
+      if(p) {
+        packets[nextPacketOut] = 0x0;
+        --inBuffer;
+      }
+      nextPacketOut = ++nextPacketOut % PACKET_BUFFER_SIZE;
+      ++i;
+    } while(!p && i<PACKET_BUFFER_SIZE);
+    
+    // Return whatever we found, if anything
+  }  
+  return p;
+}
+  
+//void Packet::init(uint8_t *buf, unsigned int dlen, bool freeData) {
+void AFSK::Packet::init(unsigned short dlen) {
+  //data = (unsigned char *)buf;
+  ready = 0;
+#ifdef PACKET_PREALLOCATE
+  freeData = 0;
+  maxLen = PACKET_MAX_LEN; // Put it here instead
+#else
+  freeData = 1;
+  dataPtr = (uint8_t *)malloc(dlen+16);
+  maxLen = dlen; // Put it here instead
+#endif
+  type = PACKET_STATIC;
+  len = 0; // We had a length, but don't put it here.
+  dataPos = dataPtr;
+  readPos = dataPtr;
+  fcs = 0xffff;
+}
+  
+// Allocate a new packet with a data buffer as set
+AFSK::Packet *AFSK::PacketBuffer::makePacket(unsigned short dlen) {
+  AFSK::Packet *p;
+  ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
+    //Packet *p = findPooledPacket();
+#ifdef PACKET_PREALLOCATE
+    if(preallocPool.count())
+      p = preallocPool.dequeue();
+    else p = NULL;
+#else
+    p = new Packet(); //(Packet *)malloc(sizeof(Packet));
+#endif
+    if(p) // If allocated
+      p->init(dlen);
+  }
+  return p; // Passes through a null on failure.
+}
+  
+// Free a packet struct, mainly convenience
+void AFSK::PacketBuffer::freePacket(Packet *p) {
+  if(!p)
+    return;
+  ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
+#ifdef PACKET_PREALLOCATE
+    preallocPool.enqueue(p);
+#else
+    p->free();
+    /*unsigned char i;
+    for(i = 0; i < PPOOL_SIZE; ++i)
+    if(p == &(pPool[i]))
+    break;
+    if(i < PPOOL_SIZE)
+    pStatus &= ~(1<<i);*/
+    delete p;
+#endif
+  }  
+}
+  
+// Put a packet onto the buffer array
+bool AFSK::PacketBuffer::putPacket(Packet *p) volatile {
+  ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
+    if(inBuffer >= PACKET_BUFFER_SIZE) {
+      return false;
+    }
+    packets[nextPacketIn] = p;
+    nextPacketIn = ++nextPacketIn % PACKET_BUFFER_SIZE;
+    ++inBuffer;
+  }  
+  return true;
+}
+  
+// Print a single byte to the data array
+size_t AFSK::Packet::write(uint8_t c) {
+  return (appendFCS(c)?1:0);
+}
+  
+size_t AFSK::Packet::write(const uint8_t *ptr, size_t len) {
+  size_t i;
+  for(i = 0; i < len; ++i)
+    if(!appendFCS(ptr[i]))
+      break;
+  return i;
+}
+
+// Add a callsign, flagged as source, destination, or digi
+// Also tell the routine the SSID to use and if this is the final callsign
+size_t AFSK::Packet::appendCallsign(const char *callsign, uint8_t ssid, bool final) {
+  uint8_t i;
+  for(i = 0; i < strlen(callsign) && i < 6; i++) {
+    appendFCS(callsign[i]<<1);
+  }
+  if(i < 6) {
+    for(;i<6;i++) {
+      appendFCS(' '<<1);
+    }
+  }
+  uint8_t ssidField = (ssid&0xf) << 1;
+  // TODO: Handle digis in the address C bit
+  if(final) {
+    ssidField |= 0b01100001;
+  } else {
+    ssidField |= 0b11100000;
+  }
+  appendFCS(ssidField);
+}
+
+#ifdef PACKET_PARSER
+// Process the AX25 frame and turn it into a bunch of useful strings
+bool AFSK::Packet::parsePacket() {
+  uint8_t *d = dataPtr;
+  int i;
+  
+  // First 7 bytes are destination-ssid
+  for(i = 0; i < 6; i++) {
+    dstCallsign[i] = (*d++)>>1;
+    if(dstCallsign[i] == ' ') {
+      dstCallsign[i] = '\0';
+    }
+  }
+  dstCallsign[6] = '\0';
+  dstSSID = ((*d++)>>1) & 0xF;
+  
+  // Next 7 bytes are source-ssid
+  for(i = 0; i < 6; i++) {
+    srcCallsign[i] = (*d++)>>1;
+    if(srcCallsign[i] == ' ') {
+      srcCallsign[i] = '\0';
+    }
+  }
+  srcCallsign[6] = '\0';
+  srcSSID = *d++; // Don't shift yet, we need the LSB
+  
+  digipeater[0][0] = '\0'; // Set null in case we have none anyway
+  if((srcSSID & 1) == 0) { // Not the last address field 
+    int digi; // Which digi we're on
+    for(digi = 0; digi < 8; digi++) {
+      for(i = 0; i < 6; i++) {
+        digipeater[digi][i] = (*d++)>>1;
+        if(digipeater[digi][i] == ' ') {
+          digipeater[digi][i] = '\0';
+        }
+      }
+      uint8_t last = (*d) & 1;
+      digipeaterSSID[digi] = ((*d++)>>1) & 0xF;
+      if(last == 1)
+        break;
+    }
+    digipeater[digi][6] = '\0';
+    for(digi += 1; digi<8; digi++) { // Empty out the rest of them
+      digipeater[digi][0] = '\0';
+    }
+  }
+  
+  // Now handle the SSID itself
+  srcSSID >>= 1;
+  srcSSID &= 0xF;
+  
+  // After the address parsing, we end up on the control field
+  control = *d++;
+  // We have a PID if control type is U or I
+  // Control & 1 == 0 == I frame
+  // Control & 3 == 3 == U frame
+  if((control & 1) == 0 || (control & 3) == 3)
+    pid = *d++;
+  else pid = 0;
+  
+  // If there is no PID, we have no data
+  if(!pid) {
+    iFrameData = NULL;
+    return true;
+  }
+  
+  // At this point, we've walked far enough along that data is just at d
+  iFrameData = d;
+  
+  // Cheat a little by setting the first byte of the FCS to 0, making it a string
+  // First FCS byte is found at -2, HDLC flags aren't in this buffer
+  dataPtr[len-2] = '\0';
+  
+  return true;
+}
+#endif
+
+void AFSK::Packet::printPacket(Stream *s) {
+  uint8_t i;
+#ifdef PACKET_PARSER
+  if(!parsePacket()) {
+    s->print(F("Packet not valid"));
+    return;
+  }
+  
+  s->print(srcCallsign);
+  if(srcSSID > 0) {
+    s->write('-');
+    s->print(srcSSID);
+  }
+  s->print(F(" > "));
+  s->print(dstCallsign);
+  if(dstSSID > 0) {
+    s->write('-');
+    s->print(dstSSID);
+  }
+  s->write(' ');
+  if(digipeater[0][0] != '\0') {
+    s->print(F("via "));
+    for(i = 0; i < 8; i++) {
+      if(digipeater[i][0] == '\0')
+        break;
+      s->print(digipeater[i]);
+      if(digipeaterSSID[i] != 0) {
+        s->write('-');
+        s->print(digipeaterSSID[i]);
+      }
+      if((digipeaterSSID[i] & _BV(7)) == _BV(7)) {
+        s->write('*'); // Digipeated already
+      }
+      // If we might have more, check to add a comma
+      if(i < 7 && digipeater[i+1][0] != '\0') {
+        s->write(',');
+      }
+      s->write(' ');
+    }
+  }
+  
+  // This is an S frame, we can only print control info
+  if(control & 3 == 1) {
+    switch((control>>2)&3) {
+      case 0:
+        s->print(F("RR"));
+        break;
+      case 1:
+        s->print(F("RNR"));
+        break;
+      case 2:
+        s->print(F("REJ"));
+        break;
+      case 3: // Undefined
+        s->print(F("unk"));
+        break;
+    }
+    // Use a + to indicate poll bit
+    if(control & _BV(4) == _BV(4)) {
+      s->write('+');
+    }
+  } else if((control & 3) == 3) { // U Frame
+    s->print(F("U("));
+    s->print(control, HEX);
+    s->write(',');
+    s->print(pid, HEX);
+    s->print(F(") "));
+  } else if((control & 1) == 0) { // I Frame
+    s->print(F("I("));
+    s->print(control, HEX);
+    s->write(',');
+    s->print(pid, HEX);
+    s->print(F(") "));
+  }
+  s->print(F("len "));
+  s->print(len);
+  s->print(F(": "));
+  s->print((char *)iFrameData);
+  s->println();
+#else // no packet parser, do a rudimentary print
+  // Second 6 bytes are source callsign
+  for(i=7; i<13; i++) {
+    s->write(*(dataPtr+i)>>1);
+  }
+  // SSID
+  s->write('-');
+  s->print((*(dataPtr+13) >> 1) & 0xF);
+  s->print(F(" -> "));
+  // First 6 bytes are destination callsign
+  for(i=0; i<6; i++) {
+    s->write(*(dataPtr+i)>>1);
+  }
+  // SSID
+  s->write('-');
+  s->print((*(dataPtr+6) >> 1) & 0xF);
+  // Control/PID next two bytes
+  // Skip those, print payload
+  for(i = 15; i<len; i++) {
+    s->write(*(dataPtr+i));
+  }
+#endif
+}
+
+// Determine what we want to do on this ADC tick.
+void AFSK::timer() {
+  static uint8_t tcnt = 0;
+  if(++tcnt == T_BIT && encoder.isSending()) {
+    PORTD |= _BV(6);
+    // Only run the encoder every 8th tick
+    // This is actually DDS RefClk / 1200 = 8, set as T_BIT
+    // A different refclk needs a different value
+    encoder.process();
+    tcnt = 0;
+    PORTD &= ~_BV(6);
+  } else {
+    decoder.process(((int8_t)(ADCH - 128)));
+  }
+}
+
+void AFSK::start(DDS *dds) {
+  afskEnabled = true;
+  encoder.setDDS(dds);
+  decoder.start();
+}

AFSK.h

@@ -0,0 +1,301 @@
+#ifndef _AFSK_H_
+#define _AFSK_H_
+
+#include <Arduino.h>
+#include <SimpleFIFO.h>
+#include <DDS.h>
+
+#define SAMPLERATE 9600
+#define BITRATE    1200
+
+#define SAMPLEPERBIT (SAMPLERATE / BITRATE)
+
+#define RX_FIFO_LEN 16
+
+#define PACKET_BUFFER_SIZE 2
+#define PACKET_STATIC 0
+
+// Enable the packet parser which will tokenize the AX25 frame into easy strings
+#define PACKET_PARSER
+
+// If this is set, all the packet buffers will be pre-allocated at compile time
+// This will use more RAM, but can make it easier to do memory planning.
+// TODO: Make this actually work right and not crash.
+#define PACKET_PREALLOCATE
+
+// This is with all the digis, two addresses, and full payload
+// Dst(7) + Src(7) + Digis(56) + Ctl(1) + PID(1) + Data(0-256) + FCS(2)
+#define PACKET_MAX_LEN 330
+// Minimum is Dst + Src + Ctl + FCS
+#define AX25_PACKET_HEADER_MINLEN 17
+
+// HDLC framing bits
+#define HDLC_FRAME    0x7E
+#define HDLC_RESET    0x7F
+#define HDLC_PREAMBLE 0x00
+#define HDLC_ESCAPE   0x1B
+#define HDLC_TAIL     0x1C
+
+class AFSK {
+private:
+  volatile bool afskEnabled;
+public:
+  bool enabled() { return afskEnabled; };
+  
+  class Packet:public Print {
+  public:
+    Packet():Print() {};
+    virtual size_t write(uint8_t);
+    // Stock virtual method does what we want here.
+    //virtual size_t write(const char *);
+    virtual size_t write(const uint8_t *, size_t);
+    using Print::write;
+    unsigned char ready : 1;
+    unsigned char type : 2;
+    unsigned char freeData : 1;
+    unsigned short len;
+    unsigned short maxLen;
+    //void init(uint8_t *buf, unsigned int dlen, bool freeData); 
+    void init(unsigned short dlen);
+    inline void free() {
+      if(freeData)
+        ::free(dataPtr);
+    }
+    inline const unsigned char getByte(void) {
+      return *readPos++;
+    }
+    inline const unsigned char getByte(uint16_t p) {
+      return *(dataPtr+p);
+    }
+    inline void start() {
+      fcs = 0xffff;
+      // No longer put an explicit frame start here
+      //*dataPos++ = HDLC_ESCAPE;
+      //*dataPos++ = HDLC_FRAME;
+      //len = 2;
+      len = 0;
+    }
+    
+    inline bool append(char c) {
+      if(len < maxLen) {
+        ++len;
+        *dataPos++ = c;
+        return true;
+      }
+      return false;	  
+    }
+    
+    #define UPDATE_FCS(d) e=fcs^(d); f=e^(e<<4); fcs=(fcs>>8)^(f<<8)^(f<<3)^(f>>4)
+    //#define UPDATE_FCS(d) s=(d)^(fcs>>8); t=s^(s>>4); fcs=(fcs<<8)^t^(t<<5)^(t<<12)
+    inline bool appendFCS(unsigned char c) {
+      register unsigned char e, f;
+      if(len < maxLen - 4) { // Leave room for FCS/HDLC
+        append(c);
+        UPDATE_FCS(c);
+        return true;
+      }
+      return false;
+    }
+    
+    size_t appendCallsign(const char *callsign, uint8_t ssid, bool final = false);
+    
+    inline void finish() {
+      append(~(fcs & 0xff));
+      append(~((fcs>>8) & 0xff));
+      // No longer append the frame boundaries themselves
+      //append(HDLC_ESCAPE);
+      //append(HDLC_FRAME);
+      ready = 1;
+    }
+    
+    inline void clear() {
+      fcs = 0xffff;
+      len = 0;
+      readPos = dataPtr;
+      dataPos = dataPtr;
+    }
+    
+    inline bool crcOK() {
+      return (fcs == 0xF0B8);
+    }
+#ifdef PACKET_PARSER
+    bool parsePacket();
+#endif
+    void printPacket(Stream *s);
+  private:
+#ifdef PACKET_PREALLOCATE
+    uint8_t dataPtr[PACKET_MAX_LEN]; // 256 byte I frame + headers max of 78
+#else
+    uint8_t *dataPtr;
+#endif
+#ifdef PACKET_PARSER
+    char srcCallsign[7];
+    uint8_t srcSSID;
+    char dstCallsign[7];
+    uint8_t dstSSID;
+    char digipeater[8][7];
+    uint8_t digipeaterSSID[8];
+    uint8_t *iFrameData;
+    uint8_t length;
+    uint8_t control;
+    uint8_t pid;
+#endif
+    uint8_t *dataPos, *readPos;
+    unsigned short fcs;
+  };
+  
+  
+  class PacketBuffer {
+  public:
+    // Initialize the buffers
+    PacketBuffer();
+    // How many packets are in the buffer?
+    unsigned char count() volatile { return inBuffer; };
+    // And how many of those are ready?
+    unsigned char readyCount() volatile;
+    // Retrieve the next packet
+    Packet *getPacket() volatile;
+    // Create a packet structure as needed
+    // This does not place it in the queue
+    static Packet *makePacket(unsigned short);
+    // Conveniently free packet memory
+    static void freePacket(Packet *);
+    // Place a packet into the buffer
+    bool putPacket(Packet *) volatile;
+  private:
+    volatile unsigned char inBuffer;
+    Packet * volatile packets[PACKET_BUFFER_SIZE];
+    volatile unsigned char nextPacketIn;
+    volatile unsigned char nextPacketOut;
+  };
+  
+  class Encoder {
+  public:
+    Encoder() {
+      randomWait = 1000; // At the very begin, wait at least one second
+      sending = false;
+      done = true;
+      packet = 0x0;
+      currentBytePos = 0;
+      nextByte = 0;
+    }
+    void setDDS(DDS *d) { dds = d; }
+    volatile inline bool isSending() volatile { 
+      return sending; 
+    }
+    volatile inline bool isDone() volatile { 
+      return done; 
+    }
+    volatile inline bool hasPackets() volatile { 
+      return (pBuf.count() > 0); 
+    }
+    inline bool putPacket(Packet *packet) {
+      return pBuf.putPacket(packet);
+    }
+    inline void setRandomWait() {
+      randomWait = 250 + (rand() % 1000) + millis();
+    }
+    bool start();
+    void stop();
+    void process();
+  private:
+    volatile bool sending;
+    byte currentByte;
+    byte currentBit : 1;
+    byte currentTone : 1;
+    byte lastZero : 3;
+    byte bitPosition : 3;
+    byte preamble : 6;
+    //byte bitClock;
+    bool hdlc;
+    byte nextByte;
+    byte maxTx;
+    Packet *packet;
+    PacketBuffer pBuf;
+    unsigned int currentBytePos;
+    volatile unsigned long randomWait;
+    volatile bool done;
+    DDS *dds;
+  };
+  
+  class HDLCDecode {
+  public:
+    bool hdlcParse(bool, SimpleFIFO<uint8_t,RX_FIFO_LEN> *fifo);
+    volatile bool rxstart;
+  private:
+    uint8_t demod_bits;
+    uint8_t bit_idx;
+    uint8_t currchar;
+  };
+  
+  class Decoder {
+  public:
+    Decoder();
+    void start();
+    bool read();
+    void process(int8_t);
+    inline bool dataAvailable() {
+      return (rx_fifo.count() > 0);
+    }
+    inline uint8_t getByte() {
+      return rx_fifo.dequeue();
+    }
+    inline uint8_t packetCount() volatile {
+      return pBuf.count();
+    }
+    inline Packet *getPacket() {
+      return pBuf.getPacket();
+    }
+    inline bool isReceiving() volatile {
+      return hdlc.rxstart;
+    }
+  private:
+    Packet *currentPacket;
+    //SimpleFIFO<int8_t,SAMPLEPERBIT/2+1> delay_fifo;
+    SimpleFIFO<uint8_t,RX_FIFO_LEN> rx_fifo; // This should be drained fairly often
+    int16_t iir_x[2];
+    int16_t iir_y[2];
+    uint8_t sampled_bits;
+    int8_t curr_phase;
+    uint8_t found_bits;
+    PacketBuffer pBuf;
+    HDLCDecode hdlc;
+  };
+  
+public:
+  inline bool read() {
+    return decoder.read();
+  }
+  volatile inline bool txReady() volatile {
+    if(encoder.isDone() && encoder.hasPackets())
+      return true;
+    return false;
+  }
+  volatile inline bool isDone() volatile { return encoder.isDone(); }
+  inline bool txStart() {
+    if(decoder.isReceiving()) {
+      encoder.setRandomWait();
+      return false;
+    } 
+    return encoder.start();
+  }
+  inline bool putTXPacket(Packet *packet) {
+    bool ret = encoder.putPacket(packet);
+    if(!ret) // No room?
+      PacketBuffer::freePacket(packet);
+    return ret;
+  }
+  inline Packet *getRXPacket() {
+    return decoder.getPacket();
+  }
+  inline uint8_t rxPacketCount() volatile {
+    return decoder.packetCount();
+  }
+  //unsigned long lastTx;
+  //unsigned long lastRx;
+  void start(DDS *);
+  void timer();
+  Encoder encoder;
+  Decoder decoder;
+};
+#endif /* _AFSK_H_ */

DDS.cpp

@@ -0,0 +1,175 @@
+#include <Arduino.h>
+#include "DDS.h"
+
+// To start the DDS, we use Timer1, set to the reference clock
+// We use Timer2 for the PWM output, running as fast as feasible
+void DDS::start() {
+  // Use the clkIO clock rate
+  ASSR &= ~(_BV(EXCLK) | _BV(AS2));
+  
+  // First, the timer for the PWM output
+  // Setup the timer to use OC2B (pin 3) in fast PWM mode with a configurable top
+  // Run it without the prescaler
+#ifdef DDS_PWM_PIN_3
+  TCCR2A = (TCCR2A | _BV(COM2B1)) & ~(_BV(COM2B0) | _BV(COM2A1) | _BV(COM2A0)) |
+         _BV(WGM21) | _BV(WGM20);
+  TCCR2B = (TCCR2B & ~(_BV(CS22) | _BV(CS21))) | _BV(CS20) | _BV(WGM22);
+#else
+  // Alternatively, use pin 11
+  // Enable output compare on OC2A, toggle mode
+  TCCR2A = _BV(COM2A1) | _BV(WGM21) | _BV(WGM20);
+  //TCCR2A = (TCCR2A | _BV(COM2A1)) & ~(_BV(COM2A0) | _BV(COM2B1) | _BV(COM2B0)) |
+  //     _BV(WGM21) | _BV(WGM20);
+  TCCR2B = _BV(CS20);
+#endif
+
+  // Set the top limit, which will be our duty cycle accuracy.
+  // Setting Comparator Bits smaller will allow for higher frequency PWM,
+  // with the loss of resolution.
+#ifdef DDS_PWM_PIN_3
+  OCR2A = pow(2,COMPARATOR_BITS)-1;
+  OCR2B = 0;
+#else
+  OCR2A = 0;
+#endif
+  
+#ifdef DDS_USE_ONLY_TIMER2
+  TIMSK2 |= _BV(TOIE2);
+#endif
+
+  // Second, setup Timer1 to trigger the ADC interrupt
+  // This lets us use decoding functions that run at the same reference
+  // clock as the DDS.
+  // We use ICR1 as TOP and prescale by 8
+  TCCR1B = _BV(CS10) | _BV(WGM13) | _BV(WGM12);
+  TCCR1A = 0;
+  ICR1 = ((F_CPU / 1) / refclk) - 1;
+#ifdef DDS_DEBUG_SERIAL
+  Serial.print(F("DDS SysClk: "));
+  Serial.println(F_CPU/8);
+  Serial.print(F("DDS RefClk: "));
+  Serial.println(refclk, DEC);
+  Serial.print(F("DDS ICR1: "));
+  Serial.println(ICR1, DEC);
+#endif
+
+  // Configure the ADC here to automatically run and be triggered off Timer1
+  ADMUX = _BV(REFS0) | _BV(ADLAR) | 0; // Channel 0, shift result left (ADCH used)
+  DDRC &= ~_BV(0);
+  PORTC &= ~_BV(0);
+  DIDR0 |= _BV(0);
+  ADCSRB = _BV(ADTS2) | _BV(ADTS1) | _BV(ADTS0);
+  ADCSRA = _BV(ADEN) | _BV(ADSC) | _BV(ADATE) | _BV(ADIE) | _BV(ADPS2); // | _BV(ADPS0);    
+}
+
+void DDS::stop() {
+  // TODO: Stop the timers.
+#ifndef DDS_USE_ONLY_TIMER2
+  TCCR1B = 0;
+#endif
+  TCCR2B = 0;
+}
+
+// Set our current sine wave frequency in Hz
+ddsAccumulator_t DDS::calcFrequency(unsigned short freq) {
+  // Fo = (M*Fc)/2^N
+  // M = (Fo/Fc)*2^N
+  ddsAccumulator_t newStep;
+  if(refclk == DDS_REFCLK_DEFAULT) {
+    // Try to use precalculated values if possible
+    if(freq == 2200) {
+      newStep = (2200.0 / (DDS_REFCLK_DEFAULT+DDS_REFCLK_OFFSET)) * pow(2,ACCUMULATOR_BITS);
+    } else if (freq == 1200) {
+      newStep = (1200.0 / (DDS_REFCLK_DEFAULT+DDS_REFCLK_OFFSET)) * pow(2,ACCUMULATOR_BITS);      
+    } else if(freq == 2400) {
+      newStep = (2400.0 / (DDS_REFCLK_DEFAULT+DDS_REFCLK_OFFSET)) * pow(2,ACCUMULATOR_BITS);
+    } else if (freq == 1500) {
+      newStep = (1500.0 / (DDS_REFCLK_DEFAULT+DDS_REFCLK_OFFSET)) * pow(2,ACCUMULATOR_BITS);      
+    } else if (freq == 600) {
+      newStep = (600.0 / (DDS_REFCLK_DEFAULT+DDS_REFCLK_OFFSET)) * pow(2,ACCUMULATOR_BITS);      
+    }
+  } else {
+    newStep = pow(2,ACCUMULATOR_BITS)*freq / (refclk+refclkOffset);
+  }
+  return newStep;
+}
+
+// Degrees should be between -360 and +360 (others don't make much sense)
+void DDS::setPhaseDeg(int16_t degrees) {
+  accumulator = degrees * (pow(2,ACCUMULATOR_BITS)/360.0);
+}
+void DDS::changePhaseDeg(int16_t degrees) {
+  accumulator += degrees * (pow(2,ACCUMULATOR_BITS)/360.0);
+}
+
+// TODO: Clean this up a bit..
+void DDS::clockTick() {
+/*  if(running) {
+    accumulator += stepRate;
+    OCR2A = getDutyCycle();
+  }
+  return;*/
+  if(running) {
+    accumulator += stepRate;
+    if(timeLimited && tickDuration == 0) {
+#ifndef DDS_PWM_PIN_3
+      OCR2A = 0;
+#else
+#ifdef DDS_IDLE_HIGH
+      // Set the duty cycle to 50%
+      OCR2B = pow(2,COMPARATOR_BITS)/2;
+#else
+      // Set duty cycle to 0, effectively off
+      OCR2B = 0;
+#endif
+#endif
+      running = false;
+      accumulator = 0;
+    } else {
+#ifdef DDS_PWM_PIN_3
+      OCR2B = getDutyCycle();
+#else
+      OCR2A = getDutyCycle();
+#endif
+    }
+    // Reduce our playback duration by one tick
+    tickDuration--;
+  } else {
+    // Hold it low
+#ifndef DDS_PWM_PIN_3
+    OCR2A = 0;
+#else
+#ifdef DDS_IDLE_HIGH
+    // Set the duty cycle to 50%
+    OCR2B = pow(2,COMPARATOR_BITS)/2;
+#else
+    // Set duty cycle to 0, effectively off
+    OCR2B = 0;
+#endif
+#endif
+  }
+}
+
+uint8_t DDS::getDutyCycle() {
+  #if ACCUMULATOR_BIT_SHIFT >= 24
+    uint16_t phAng;
+  #else
+    uint8_t phAng;
+  #endif
+  if(amplitude == 0) // Shortcut out on no amplitude
+    return 128>>(8-COMPARATOR_BITS);
+  phAng = (accumulator >> ACCUMULATOR_BIT_SHIFT);
+  int8_t position = pgm_read_byte_near(ddsSineTable + phAng); //>>(8-COMPARATOR_BITS);
+  // Apply scaling and return
+  int16_t scaled = position;
+  // output = ((duty * amplitude) / 256) + 128
+  // This keeps amplitudes centered around 50% duty
+  if(amplitude != 255) { // Amplitude is reduced, so do the full math
+    scaled *= amplitude;
+    scaled >>= 8+(8-COMPARATOR_BITS);
+  } else { // Otherwise, only shift for the comparator bits
+    scaled >>= (8-COMPARATOR_BITS);
+  }
+  scaled += 128>>(8-COMPARATOR_BITS);
+  return scaled;
+}

DDS.h

@@ -0,0 +1,228 @@
+#ifndef _DDS_H_
+#define _DDS_H_
+
+#include <avr/pgmspace.h>
+
+// Use pin 3 for PWM? If not defined, use pin 11
+// Quality on pin 3 is higher than on 11, as it can be clocked faster
+// when the COMPARATOR_BITS value is less than 8
+#define DDS_PWM_PIN_3
+
+// Normally, we turn on timer2 and timer1, and have ADC sampling as our clock
+// Define this to only use Timer2, and not start the ADC clock
+// #define DDS_USE_ONLY_TIMER2
+
+// Use a short (16 bit) accumulator. Phase accuracy is reduced, but speed
+// is increased, along with a reduction in memory use.
+#define SHORT_ACCUMULATOR
+
+#ifdef SHORT_ACCUMULATOR
+#define ACCUMULATOR_BITS      16
+typedef uint16_t ddsAccumulator_t;
+#else
+#define ACCUMULATOR_BITS      32
+typedef uint32_t ddsAccumulator_t;
+#endif
+
+// If defined, the timer will idle at 50% duty cycle
+// This leaves it floating in the centre of the PWM/DAC voltage range
+#define DDS_IDLE_HIGH
+
+// Select how fast the PWM is, at the expense of level accuracy.
+// A faster PWM rate will make for easier filtering of the output wave,
+// while a slower one will allow for more accurate voltage level outputs,
+// but will increase the filtering requirements on the output.
+// 8 = 62.5kHz PWM
+// 7 = 125kHz PWM
+// 6 = 250kHz PWM
+#ifdef DDS_PWM_PIN_3
+#define COMPARATOR_BITS       6
+#else // When using pin 11, we always want 8 bits
+#define COMPARATOR_BITS       8
+#endif
+
+// This is how often we'll perform a phase advance, as well as ADC sampling
+// rate. The higher this value, the smoother the output wave will be, at the
+// expense of CPU time. It maxes out around 62000 (TBD)
+// May be overridden in the sketch to improve performance
+#ifndef DDS_REFCLK_DEFAULT
+#define DDS_REFCLK_DEFAULT     9600
+#endif
+// As each Arduino crystal is a little different, this can be fine tuned to
+// provide more accurate frequencies. Adjustments in the range of hundreds
+// is a good start.
+#ifndef DDS_REFCLK_OFFSET
+#define DDS_REFCLK_OFFSET     0
+#endif
+
+#ifdef DDS_USE_ONLY_TIMER2
+// TODO: Figure out where this clock value is generated from
+#define DDS_REFCLK_DEFAULT     (62500/4)
+#endif
+
+// Output some of the calculations and information about the DDS over serial
+//#define DDS_DEBUG_SERIAL
+
+// When defined, use the 1024 element sine lookup table. This improves phase
+// accuracy, at the cost of more flash and CPU requirements.
+// #define DDS_TABLE_LARGE
+
+#ifdef DDS_TABLE_LARGE
+// How many bits to keep from the accumulator to look up in this table
+#define ACCUMULATOR_BIT_SHIFT (ACCUMULATOR_BITS-10)
+static const int8_t ddsSineTable[1024] PROGMEM = {
+  0, 0, 1, 2, 3, 3, 4, 5, 6, 7, 7, 8, 9, 10, 10, 11, 12, 13, 13, 14, 15, 16, 17, 17, 18, 19, 20, 20, 21, 22, 23, 24, 
+  24, 25, 26, 27, 27, 28, 29, 30, 30, 31, 32, 33, 33, 34, 35, 36, 36, 37, 38, 39, 39, 40, 41, 42, 42, 43, 44, 44, 45, 46, 47, 47, 
+  48, 49, 50, 50, 51, 52, 52, 53, 54, 55, 55, 56, 57, 57, 58, 59, 59, 60, 61, 61, 62, 63, 63, 64, 65, 65, 66, 67, 67, 68, 69, 69, 
+  70, 71, 71, 72, 73, 73, 74, 75, 75, 76, 76, 77, 78, 78, 79, 79, 80, 81, 81, 82, 82, 83, 84, 84, 85, 85, 86, 87, 87, 88, 88, 89, 
+  89, 90, 90, 91, 91, 92, 93, 93, 94, 94, 95, 95, 96, 96, 97, 97, 98, 98, 99, 99, 100, 100, 101, 101, 102, 102, 102, 103, 103, 104, 104, 105, 
+  105, 106, 106, 106, 107, 107, 108, 108, 108, 109, 109, 110, 110, 110, 111, 111, 112, 112, 112, 113, 113, 113, 114, 114, 114, 115, 115, 115, 116, 116, 116, 117, 
+  117, 117, 117, 118, 118, 118, 119, 119, 119, 119, 120, 120, 120, 120, 121, 121, 121, 121, 121, 122, 122, 122, 122, 123, 123, 123, 123, 123, 123, 124, 124, 124, 
+  124, 124, 124, 124, 125, 125, 125, 125, 125, 125, 125, 125, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 
+  127, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 125, 125, 125, 125, 125, 125, 125, 125, 124, 124, 124, 
+  124, 124, 124, 124, 123, 123, 123, 123, 123, 123, 122, 122, 122, 122, 121, 121, 121, 121, 121, 120, 120, 120, 120, 119, 119, 119, 119, 118, 118, 118, 117, 117, 
+  117, 117, 116, 116, 116, 115, 115, 115, 114, 114, 114, 113, 113, 113, 112, 112, 112, 111, 111, 110, 110, 110, 109, 109, 108, 108, 108, 107, 107, 106, 106, 106, 
+  105, 105, 104, 104, 103, 103, 102, 102, 102, 101, 101, 100, 100, 99, 99, 98, 98, 97, 97, 96, 96, 95, 95, 94, 94, 93, 93, 92, 91, 91, 90, 90, 
+  89, 89, 88, 88, 87, 87, 86, 85, 85, 84, 84, 83, 82, 82, 81, 81, 80, 79, 79, 78, 78, 77, 76, 76, 75, 75, 74, 73, 73, 72, 71, 71, 
+  70, 69, 69, 68, 67, 67, 66, 65, 65, 64, 63, 63, 62, 61, 61, 60, 59, 59, 58, 57, 57, 56, 55, 55, 54, 53, 52, 52, 51, 50, 50, 49, 
+  48, 47, 47, 46, 45, 44, 44, 43, 42, 42, 41, 40, 39, 39, 38, 37, 36, 36, 35, 34, 33, 33, 32, 31, 30, 30, 29, 28, 27, 27, 26, 25, 
+  24, 24, 23, 22, 21, 20, 20, 19, 18, 17, 17, 16, 15, 14, 13, 13, 12, 11, 10, 10, 9, 8, 7, 7, 6, 5, 4, 3, 3, 2, 1, 0, 
+  0, 0, -1, -2, -3, -3, -4, -5, -6, -7, -7, -8, -9, -10, -10, -11, -12, -13, -13, -14, -15, -16, -17, -17, -18, -19, -20, -20, -21, -22, -23, -24, 
+  -24, -25, -26, -27, -27, -28, -29, -30, -30, -31, -32, -33, -33, -34, -35, -36, -36, -37, -38, -39, -39, -40, -41, -42, -42, -43, -44, -44, -45, -46, -47, -47, 
+  -48, -49, -50, -50, -51, -52, -52, -53, -54, -55, -55, -56, -57, -57, -58, -59, -59, -60, -61, -61, -62, -63, -63, -64, -65, -65, -66, -67, -67, -68, -69, -69, 
+  -70, -71, -71, -72, -73, -73, -74, -75, -75, -76, -76, -77, -78, -78, -79, -79, -80, -81, -81, -82, -82, -83, -84, -84, -85, -85, -86, -87, -87, -88, -88, -89, 
+  -89, -90, -90, -91, -91, -92, -93, -93, -94, -94, -95, -95, -96, -96, -97, -97, -98, -98, -99, -99, -100, -100, -101, -101, -102, -102, -102, -103, -103, -104, -104, -105, 
+  -105, -106, -106, -106, -107, -107, -108, -108, -108, -109, -109, -110, -110, -110, -111, -111, -112, -112, -112, -113, -113, -113, -114, -114, -114, -115, -115, -115, -116, -116, -116, -117, 
+  -117, -117, -117, -118, -118, -118, -119, -119, -119, -119, -120, -120, -120, -120, -121, -121, -121, -121, -121, -122, -122, -122, -122, -123, -123, -123, -123, -123, -123, -124, -124, -124, 
+  -124, -124, -124, -124, -125, -125, -125, -125, -125, -125, -125, -125, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, 
+  -127, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -126, -125, -125, -125, -125, -125, -125, -125, -125, -124, -124, -124, 
+  -124, -124, -124, -124, -123, -123, -123, -123, -123, -123, -122, -122, -122, -122, -121, -121, -121, -121, -121, -120, -120, -120, -120, -119, -119, -119, -119, -118, -118, -118, -117, -117, 
+  -117, -117, -116, -116, -116, -115, -115, -115, -114, -114, -114, -113, -113, -113, -112, -112, -112, -111, -111, -110, -110, -110, -109, -109, -108, -108, -108, -107, -107, -106, -106, -106, 
+  -105, -105, -104, -104, -103, -103, -102, -102, -102, -101, -101, -100, -100, -99, -99, -98, -98, -97, -97, -96, -96, -95, -95, -94, -94, -93, -93, -92, -91, -91, -90, -90, 
+  -89, -89, -88, -88, -87, -87, -86, -85, -85, -84, -84, -83, -82, -82, -81, -81, -80, -79, -79, -78, -78, -77, -76, -76, -75, -75, -74, -73, -73, -72, -71, -71, 
+  -70, -69, -69, -68, -67, -67, -66, -65, -65, -64, -63, -63, -62, -61, -61, -60, -59, -59, -58, -57, -57, -56, -55, -55, -54, -53, -52, -52, -51, -50, -50, -49, 
+  -48, -47, -47, -46, -45, -44, -44, -43, -42, -42, -41, -40, -39, -39, -38, -37, -36, -36, -35, -34, -33, -33, -32, -31, -30, -30, -29, -28, -27, -27, -26, -25, 
+  -24, -24, -23, -22, -21, -20, -20, -19, -18, -17, -17, -16, -15, -14, -13, -13, -12, -11, -10, -10, -9, -8, -7, -7, -6, -5, -4, -3, -3, -2, -1, 0
+};
+#else
+#define ACCUMULATOR_BIT_SHIFT (ACCUMULATOR_BITS-8)
+static const int8_t ddsSineTable[256] PROGMEM = {
+  0, 3, 6, 9, 12, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49,
+  51, 54, 57, 60, 63, 65, 68, 71, 73, 76, 78, 81, 83, 85, 88, 90,
+  92, 94, 96, 98, 100, 102, 104, 106, 107, 109, 111, 112, 113, 115,
+  116, 117, 118, 120, 121, 122, 122, 123, 124, 125, 125, 126, 126,
+  126, 127, 127, 127, 127, 127, 127, 127, 126, 126, 126, 125, 125,
+  124, 123, 122, 122, 121, 120, 118, 117, 116, 115, 113, 112, 111,
+  109, 107, 106, 104, 102, 100, 98, 96, 94, 92, 90, 88, 85, 83, 81,
+  78, 76, 73, 71, 68, 65, 63, 60, 57, 54, 51, 49, 46, 43, 40, 37,
+  34, 31, 28, 25, 22, 19, 16, 12, 9, 6, 3, 0, -3, -6, -9, -12, -16,
+  -19, -22, -25, -28, -31, -34, -37, -40, -43, -46, -49, -51, -54,
+  -57, -60, -63, -65, -68, -71, -73, -76, -78, -81, -83, -85, -88,
+  -90, -92, -94, -96, -98, -100, -102, -104, -106, -107, -109, -111,
+  -112, -113, -115, -116, -117, -118, -120, -121, -122, -122, -123,
+  -124, -125, -125, -126, -126, -126, -127, -127, -127, -127, -127,
+  -127, -127, -126, -126, -126, -125, -125, -124, -123, -122, -122,
+  -121, -120, -118, -117, -116, -115, -113, -112, -111, -109, -107,
+  -106, -104, -102, -100, -98, -96, -94, -92, -90, -88, -85, -83,
+  -81, -78, -76, -73, -71, -68, -65, -63, -60, -57, -54, -51, -49,
+  -46, -43, -40, -37, -34, -31, -28, -25, -22, -19, -16, -12, -9, -6, -3
+  };
+#endif /* DDS_TABLE_LARGE */
+
+class DDS {
+public:
+  DDS(): refclk(DDS_REFCLK_DEFAULT), refclkOffset(DDS_REFCLK_OFFSET),
+    accumulator(0), running(false),
+    timeLimited(false), tickDuration(0), amplitude(255)
+    {};
+
+  // Start all of the timers needed
+  void start();
+  // Is the DDS presently producing a tone?
+  const bool isRunning() { return running; };
+  // Stop the DDS timers
+  void stop();
+  
+  // Start and stop the PWM output
+  void on() {
+    timeLimited = false;
+    running = true;
+  }
+  // Provide a duration in ms for the tone
+  void on(unsigned short duration) {
+    // Duration in ticks from milliseconds is:
+    // t = (1/refclk)
+    tickDuration = (unsigned long)((unsigned long)duration * (unsigned long)refclk) / 1000;
+    timeLimited = true;
+    running = true;
+  }
+  void off() {
+    running = false;
+  }
+  
+  // Generate a tone for a specific amount of time
+  void play(unsigned short freq, unsigned short duration) {
+    setFrequency(freq);
+    on(duration);
+  }
+  // Blocking version
+  void playWait(unsigned short freq, unsigned short duration) {
+    play(freq, duration);
+    delay(duration);
+  }
+  
+  // Use these to get some calculated values for specific frequencies
+  // or to get the current frequency stepping rate.
+  ddsAccumulator_t calcFrequency(unsigned short freq);
+  ddsAccumulator_t getPhaseAdvance() { return stepRate; };
+  
+  // Our maximum clock isn't very high, so our highest
+  // frequency supported will fit in a short.
+  void setFrequency(unsigned short freq) { stepRate = calcFrequency(freq); };
+  void setPrecalcFrequency(ddsAccumulator_t freq) { stepRate = freq; };
+  
+  // Handle phase shifts
+  void setPhaseDeg(int16_t degrees);
+  void changePhaseDeg(int16_t degrees);
+  
+  // Adjustable reference clock. This shoud be done before the timers are
+  // started, or they will need to be restarted. Frequencies will need to
+  // be set again to use the new clock.
+  void setReferenceClock(unsigned long ref) {
+    refclk = ref;
+  }
+  unsigned long getReferenceClock() {
+    return refclk;
+  }
+
+  void setReferenceOffset(int16_t offset) {
+    refclkOffset = offset;
+  }
+  int16_t getReferenceOffset() {
+    return refclkOffset;
+  }
+  
+  uint8_t getDutyCycle();
+
+  // Set a scaling factor. To keep things quick, this is a power of 2 value.
+  // Set it with 0 for lowest (which will be off), 8 is highest.
+  void setAmplitude(unsigned char amp) {
+    amplitude = amp;
+  }
+  
+  // This is the function called by the ADC_vect ISR to produce the tones
+  void clockTick();
+  
+private:
+  volatile bool running;
+  volatile unsigned long tickDuration;
+  volatile bool timeLimited;
+  volatile unsigned char amplitude;
+  volatile ddsAccumulator_t accumulator;
+  volatile ddsAccumulator_t stepRate;
+  ddsAccumulator_t refclk;
+  int16_t refclkOffset;
+  static DDS *sDDS;
+};
+
+#endif /* _DDS_H_ */

HamShield.h

@@ -8,17 +8,24 @@
 #ifndef _HAMSHIELD_H_
 #define _HAMSHIELD_H_
 
-#include "I2Cdev_rda.h"
+//#include "I2Cdev_rda.h"
+//#include "I2Cdev.h"
+#include "HamShield_comms.h"
+#include "SimpleFIFO.h"
+#include "AFSK.h"
+#include "DDS.h"
 #include <avr/pgmspace.h>
 
 // HamShield constants
 
 #define HAMSHIELD_MORSE_DOT             100    // Morse code dot length (smaller is faster WPM)
 #define HAMSHIELD_MORSE_BUFFER_SIZE      80    // Char buffer size for morse code text
-#define HAMSHIELD_AUX_BUTTON              5    // Pin assignment for AUX button
+#define HAMSHIELD_AUX_BUTTON              2    // Pin assignment for AUX button
-#define HAMSHIELD_PWM_PIN                 11    // Pin assignment for PWM output
+#define HAMSHIELD_PWM_PIN                 3    // Pin assignment for PWM output
 #define HAMSHIELD_EMPTY_CHANNEL_RSSI   -110    // Default threshold where channel is considered "clear"
 
+#define HAMSHIELD_AFSK_RX_FIFO_LEN 16
+
 // button modes
 #define PTT_MODE 1
 #define RESET_MODE 2
@@ -181,7 +188,7 @@
 #define A1846S_VOX_FLAG_BIT        0  // vox out from dsp
 
 // Bitfields for A1846S_RSSI_REG
-#define A1846S_RSSI_BIT            15  // RSSI readings <9:0>
+#define A1846S_RSSI_BIT            15  // RSSI readings <7:0>
 #define A1846S_RSSI_LENGTH         8
 
 // Bitfields for A1846S_VSSI_REG
@@ -252,6 +259,9 @@
 
 class HamShield {
     public:
+	    // public singleton for ISRs to reference
+        static HamShield *sHamShield; // HamShield singleton, used for ISRs mostly
+		
         HamShield();
         HamShield(uint8_t address);
 
@@ -262,47 +272,12 @@ class HamShield {
         uint16_t readCtlReg();
         void softReset();
 		
-	// center frequency
+        // restrictions control
-	void setFrequency(uint32_t freq_khz);
+        void dangerMode();
-	uint32_t getFrequency();
+        void safeMode();
 		
-	// band
-	// 00 - 400-520MHz
-	// 10 - 200-260MHz
-	// 11 - 134-174MHz
-	void setBand(uint16_t band);
-	uint16_t getBand();
-	
-        void setUHF();
-        void setVHF();
-        void setNoFilters();
 		bool frequency(uint32_t freq_khz);
-        
+		uint32_t getFrequency();
-	// xtal frequency (kHz)
-	// 12-14MHz crystal: this reg is set to crystal freq_khz
-	// 24-28MHz crystal: this reg is set to crystal freq_khz / 2
-	void setXtalFreq(uint16_t freq_kHz);
-	uint16_t getXtalFreq();
-		
-	// adclk frequency (kHz)
-	// 12-14MHz crystal: this reg is set to crystal freq_khz / 2
-	// 24-28MHz crystal: this reg is set to crystal freq_khz / 4
-	void setAdcClkFreq(uint16_t freq_kHz);
-	uint16_t getAdcClkFreq();
-
-	// clk mode
-	// 12-14MHz: set to 1
-	// 24-28MHz: set to 0
-	void setClkMode(bool LFClk);
-	bool getClkMode();
-		
-	// clk example
-	// 12.8MHz clock
-	// A1846S_XTAL_FREQ_REG[15:0]= xtal_freq<15:0>=12.8*1000=12800
-	// A1846S_ADCLK_FREQ_REG[12:0] =adclk_freq<15:0>=(12.8/2)*1000=6400
-	// A1846S_CLK_MODE_REG[0]= clk_mode =1
-	
-	// TX/RX control
 			
 		// channel mode
 		// 11 - 25kHz channel
@@ -311,13 +286,6 @@ class HamShield {
 		void setChanMode(uint16_t mode);
 		uint16_t getChanMode();
 		
-	// choose tx or rx
-	void setTX(bool on_noff);
-	bool getTX();
-	
-	void setRX(bool on_noff);
-	bool getRX();
-	
 		void setModeTransmit(); // turn off rx, turn on tx
 		void setModeReceive(); // turn on rx, turn off tx
 		void setModeOff(); // turn off rx, turn off tx, set pwr_dwn bit
@@ -335,6 +303,7 @@ class HamShield {
 		void setTxSourceNone();
 		uint16_t getTxSource();
 		
+		// PA bias voltage is unused (maybe remove this)
 		// set PA_bias voltage
 		//    000000: 1.01V
 		//    000001:1.05V
@@ -478,6 +447,7 @@ class HamShield {
 		void setGpioLow(uint16_t gpio);
 		void setGpioHi(uint16_t gpio);
 		uint16_t getGpioMode(uint16_t gpio);
+		uint16_t getGpios();
 		
 		// Int
 		void enableInterrupt(uint16_t interrupt);
@@ -512,11 +482,6 @@ class HamShield {
         bool setWXChannel(uint8_t channel);
         uint8_t scanWXChannel();
   
-
-        // restrictions control
-        void dangerMode();
-        void safeMode();
-  
         // utilities
         uint32_t scanMode(uint32_t start,uint32_t stop, uint8_t speed, uint16_t step, uint16_t threshold);
         uint32_t findWhitespace(uint32_t start,uint32_t stop, uint8_t dwell, uint16_t step, uint16_t threshold);
@@ -526,7 +491,7 @@ class HamShield {
         static void isr_ptt();
         static void isr_reset();
 		void morseOut(char buffer[HAMSHIELD_MORSE_BUFFER_SIZE]);
-	char morseLookup(char letter);
+		uint8_t morseLookup(char letter);
         bool waitForChannel(long timeout, long breakwindow, int setRSSI);
         void SSTVVISCode(int code);
         void SSTVTestPattern(int code);
@@ -535,24 +500,58 @@ class HamShield {
         bool parityCalc(int code);
 		// void AFSKOut(char buffer[80]); 
 
+		// AFSK routines
+		bool AFSKStart();
+		bool AFSKEnabled() { return afsk.enabled(); }
+		bool AFSKStop();
+		bool AFSKOut(const char *);
+       
+		class AFSK afsk;
        
     private:
         uint8_t devAddr;
         uint16_t radio_i2c_buf[4];
-        int pwr_control_pin;
+		bool tx_active;
+		bool rx_active;
         uint32_t radio_frequency;
         uint32_t FRS[];
         uint32_t GMRS[];
         uint32_t MURS[];
         uint32_t WX[];
-        static HamShield *sHamShield; // HamShield singleton, used for ISRs mostly
 		
-//          int8_t A1846S::readWord(uint8_t devAddr, uint8_t regAddr, uint16_t *data, uint16_t timeout);
+		// private utility functions
-//          int8_t A1846S::readBits(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t *data, uint16_t timeout);
+		// these functions should not be called in the Arduino sketch
-//          int8_t A1846S::readBit(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t *data, uint16_t timeout);
+		// just use the above public functions to do everything
-//          int8_t A1846S::writeWord(uint8_t devAddr, uint8_t regAddr, uint16_t *data, uint16_t timeout);
+		
-//          bool A1846S::writeBits(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t data);
+		void setFrequency(uint32_t freq_khz);
-//          bool A1846S::writeBit(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t data);
+		void setTxBand2m();
+		void setTxBand1_2m();
+		void setTxBand70cm();
+		
+		// xtal frequency (kHz)
+		// 12-14MHz crystal: this reg is set to crystal freq_khz
+		// 24-28MHz crystal: this reg is set to crystal freq_khz / 2
+		void setXtalFreq(uint16_t freq_kHz);
+		uint16_t getXtalFreq();
+			
+		// adclk frequency (kHz)
+		// 12-14MHz crystal: this reg is set to crystal freq_khz / 2
+		// 24-28MHz crystal: this reg is set to crystal freq_khz / 4
+		void setAdcClkFreq(uint16_t freq_kHz);
+		uint16_t getAdcClkFreq();
+
+		// clk mode
+		// 12-14MHz: set to 1
+		// 24-28MHz: set to 0
+		void setClkMode(bool LFClk);
+		bool getClkMode();
+		
+		// choose tx or rx
+		void setTX(bool on_noff);
+		bool getTX();
+		
+		void setRX(bool on_noff);
+		bool getRX();
 };
 
 #endif /* _HAMSHIELD_H_ */

HamShield_comms.cpp

@@ -0,0 +1,168 @@
+/*
+ * Based loosely on I2Cdev by Jeff Rowberg, except for all kludgy bit-banging
+ */
+
+#include "HamShield_comms.h"
+
+int8_t HSreadBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t *data)
+{
+    uint16_t b;
+    uint8_t count = HSreadWord(devAddr, regAddr, &b);
+    *data = b & (1 << bitNum);
+    return count;
+}
+
+int8_t HSreadBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t *data)
+{
+	uint8_t count;
+    uint16_t w;
+    if ((count = HSreadWord(devAddr, regAddr, &w)) != 0) {
+        uint16_t mask = ((1 << length) - 1) << (bitStart - length + 1);
+        w &= mask;
+        w >>= (bitStart - length + 1);
+        *data = w;
+    }
+    return count;
+}
+
+int8_t HSreadWord(uint8_t devAddr, uint8_t regAddr, uint16_t *data)
+{
+	//return I2Cdev::readWord(devAddr, regAddr, data);
+	
+	uint8_t temp;
+	uint16_t temp_dat;
+	// bitbang for great justice!
+	*data = 0;
+	cli();
+	DDRC |= ((1<<5) | (1<<4)); // set direction to output
+	sei();
+	regAddr = regAddr | (1 << 7);
+	
+	cli();
+	PORTC &= ~(1<<1); //digitalWrite(nSEN, 0);
+	sei();
+	for (int i = 0; i < 8; i++) {
+		temp = ((regAddr & (0x80 >> i)) != 0);
+		cli();
+		PORTC &= ~(1<<5); //digitalWrite(CLK, 0);
+		sei();
+		//digitalWrite(DAT, regAddr & (0x80 >> i));
+		temp = (PORTC & ~(1<<4)) + (temp << 4);
+		cli();
+		PORTC = temp;
+		sei();
+		delayMicroseconds(9);
+		cli();
+		PORTC |= (1<<5); //digitalWrite(CLK, 1);
+		sei();
+		delayMicroseconds(9);
+	}
+	// change direction of DAT
+	cli();
+	DDRC &= ~(1<<4); //pinMode(DAT, INPUT);
+	sei();
+	for (int i = 15; i >= 0; i--) {
+		cli();
+		PORTC &= ~(1<<5); //digitalWrite(CLK, 0);
+		sei();
+		delayMicroseconds(9);
+		cli();
+		PORTC |= (1<<5); //digitalWrite(CLK, 1);
+		sei();
+		cli();
+		temp_dat = ((PINC & (1<<4)) != 0);
+		sei();
+		temp_dat = temp_dat << i;
+		*data |= temp_dat; // digitalRead(DAT);
+		delayMicroseconds(9);
+	}
+	cli();
+	PORTC |= (1<<1);//digitalWrite(nSEN, 1);
+	
+	DDRC &= ~((1<<5) | (1<<4)); // set direction all input (for ADC)
+	sei();
+	return 1;
+}
+
+
+bool HSwriteBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t data)
+{
+	uint16_t w;
+    HSreadWord(devAddr, regAddr, &w);
+    w = (data != 0) ? (w | (1 << bitNum)) : (w & ~(1 << bitNum));
+    return HSwriteWord(devAddr, regAddr, w);
+}
+
+bool HSwriteBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t data)
+{
+uint16_t w;
+    if (HSreadWord(devAddr, regAddr, &w) != 0) {
+        uint16_t mask = ((1 << length) - 1) << (bitStart - length + 1);
+        data <<= (bitStart - length + 1); // shift data into correct position
+        data &= mask; // zero all non-important bits in data
+        w &= ~(mask); // zero all important bits in existing word
+        w |= data; // combine data with existing word
+        return HSwriteWord(devAddr, regAddr, w);
+    } else {
+        return false;
+    }
+}
+
+bool HSwriteWord(uint8_t devAddr, uint8_t regAddr, uint16_t data)
+{
+	//return I2Cdev::writeWord(devAddr, regAddr, data);
+	
+	uint8_t temp_reg;
+	uint16_t temp_dat;
+	
+	//digitalWrite(13, HIGH);
+	
+	// bitbang for great justice!
+	cli();
+	DDRC |= ((1<<5) | (1<<4)); // set direction all output
+	//PORTC |= (1<<5) & (1<<4);
+	sei();
+	regAddr = regAddr & ~(1 << 7);
+	
+	cli();
+	PORTC &= ~(1<<1); //digitalWrite(nSEN, 0);
+	sei();
+	for (int i = 0; i < 8; i++) {
+		temp_reg = ((regAddr & (0x80 >> i)) != 0);
+		cli();
+		PORTC &= ~(1<<5); //digitalWrite(CLK, 0);
+		sei();
+		//digitalWrite(DAT, regAddr & (0x80 >> i));
+		temp_reg = (PORTC & ~(1<<4)) + (temp_reg << 4);
+		cli();
+		PORTC = temp_reg;
+		sei();
+		delayMicroseconds(8);
+		cli();
+		PORTC |= (1<<5); //digitalWrite(CLK, 1);
+		sei();
+		delayMicroseconds(10);
+	}
+	for (int i = 0; i < 16; i++) {
+		temp_dat = ((data & (0x8000 >> i)) != 0);
+		cli();
+		PORTC &= ~(1<<5); //digitalWrite(CLK, 0);
+		sei();
+		//digitalWrite(DAT, data & (0x80000 >> i));
+		temp_reg = (PORTC & ~(1<<4)) + (temp_dat << 4);
+		cli();
+		PORTC = temp_reg;
+		sei();
+		delayMicroseconds(7);
+		cli();
+		PORTC |= (1<<5); //digitalWrite(CLK, 1);
+		sei();
+		delayMicroseconds(10);
+	}
+	cli();
+	PORTC |= (1<<1); //digitalWrite(nSEN, 1);
+	
+	DDRC &= ~((1<<5) | (1<<4)); // set direction to input for ADC
+	sei();
+	return true;
+}

HamShield_comms.h

@@ -0,0 +1,22 @@
+
+
+
+#ifndef _HAMSHIELD_COMMS_H_
+#define _HAMSHIELD_COMMS_H_
+
+#include "Arduino.h"
+//#include "I2Cdev.h"
+
+#define nSEN A1
+#define CLK A5
+#define DAT A4
+
+int8_t HSreadBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t *data);
+int8_t HSreadBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t *data);
+int8_t HSreadWord(uint8_t devAddr, uint8_t regAddr, uint16_t *data);
+
+bool HSwriteBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t data);
+bool HSwriteBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t data);
+bool HSwriteWord(uint8_t devAddr, uint8_t regAddr, uint16_t data);
+
+#endif /* _HAMSHIELD_COMMS_H_ */

I2Cdev_rda.h

@@ -1,269 +0,0 @@
-// I2Cdev library collection - Main I2C device class header file
-// Abstracts bit and byte I2C R/W functions into a convenient class
-// 6/9/2012 by Jeff Rowberg <jeff@rowberg.net>
-//
-// Changelog:
-//      2013-05-06 - add Francesco Ferrara's Fastwire v0.24 implementation with small modifications
-//      2013-05-05 - fix issue with writing bit values to words (Sasquatch/Farzanegan)
-//      2012-06-09 - fix major issue with reading > 32 bytes at a time with Arduino Wire
-//                 - add compiler warnings when using outdated or IDE or limited I2Cdev implementation
-//      2011-11-01 - fix write*Bits mask calculation (thanks sasquatch @ Arduino forums)
-//      2011-10-03 - added automatic Arduino version detection for ease of use
-//      2011-10-02 - added Gene Knight's NBWire TwoWire class implementation with small modifications
-//      2011-08-31 - added support for Arduino 1.0 Wire library (methods are different from 0.x)
-//      2011-08-03 - added optional timeout parameter to read* methods to easily change from default
-//      2011-08-02 - added support for 16-bit registers
-//                 - fixed incorrect Doxygen comments on some methods
-//                 - added timeout value for read operations (thanks mem @ Arduino forums)
-//      2011-07-30 - changed read/write function structures to return success or byte counts
-//                 - made all methods static for multi-device memory savings
-//      2011-07-28 - initial release
-
-/* ============================================
-I2Cdev device library code is placed under the MIT license
-Copyright (c) 2013 Jeff Rowberg
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-===============================================
-*/
-
-#ifndef _I2CDEV_RDA_H_
-#define _I2CDEV_RDA_H_
-
-// -----------------------------------------------------------------------------
-// I2C interface implementation setting
-// -----------------------------------------------------------------------------
-#define I2CDEV_IMPLEMENTATION       I2CDEV_ARDUINO_WIRE
-//#define I2CDEV_IMPLEMENTATION       I2CDEV_BUILTIN_FASTWIRE
-
-// comment this out if you are using a non-optimal IDE/implementation setting
-// but want the compiler to shut up about it
-#define I2CDEV_IMPLEMENTATION_WARNINGS
-
-// -----------------------------------------------------------------------------
-// I2C interface implementation options
-// -----------------------------------------------------------------------------
-#define I2CDEV_ARDUINO_WIRE         1 // Wire object from Arduino
-#define I2CDEV_BUILTIN_NBWIRE       2 // Tweaked Wire object from Gene Knight's NBWire project
-                                      // ^^^ NBWire implementation is still buggy w/some interrupts!
-#define I2CDEV_BUILTIN_FASTWIRE     3 // FastWire object from Francesco Ferrara's project
-#define I2CDEV_I2CMASTER_LIBRARY    4 // I2C object from DSSCircuits I2C-Master Library at https://github.com/DSSCircuits/I2C-Master-Library
-
-// -----------------------------------------------------------------------------
-// Arduino-style "Serial.print" debug constant (uncomment to enable)
-// -----------------------------------------------------------------------------
-//#define I2CDEV_SERIAL_DEBUG
-
-#ifdef ARDUINO
-    #if ARDUINO < 100
-        #include "WProgram.h"
-    #else
-        #include "Arduino.h"
-    #endif
-    #if I2CDEV_IMPLEMENTATION == I2CDEV_ARDUINO_WIRE
-        #include <Wire.h>
-    #endif
-    #if I2CDEV_IMPLEMENTATION == I2CDEV_I2CMASTER_LIBRARY
-        #include <I2C.h>
-    #endif
-#endif
-
-// 1000ms default read timeout (modify with "I2Cdev::readTimeout = [ms];")
-#define I2CDEV_DEFAULT_READ_TIMEOUT     1000
-
-class I2Cdev {
-    public:
-        I2Cdev();
-        
-        static int8_t readBit(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint8_t *data, uint16_t timeout=I2Cdev::readTimeout);
-        static int8_t readBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout);
-        static int8_t readBits(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint8_t *data, uint16_t timeout=I2Cdev::readTimeout);
-        static int8_t readBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout);
-        static int8_t readByte(uint8_t devAddr, uint8_t regAddr, uint8_t *data, uint16_t timeout=I2Cdev::readTimeout);
-        static int8_t readWord(uint8_t devAddr, uint8_t regAddr, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout);
-        static int8_t readBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint8_t *data, uint16_t timeout=I2Cdev::readTimeout);
-        static int8_t readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout);
-
-        static bool writeBit(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint8_t data);
-        static bool writeBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t data);
-        static bool writeBits(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint8_t data);
-        static bool writeBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t data);
-        static bool writeByte(uint8_t devAddr, uint8_t regAddr, uint8_t data);
-        static bool writeWord(uint8_t devAddr, uint8_t regAddr, uint16_t data);
-        static bool writeBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint8_t *data);
-        static bool writeWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data);
-
-        static uint16_t readTimeout;
-};
-
-#if I2CDEV_IMPLEMENTATION == I2CDEV_BUILTIN_FASTWIRE
-    //////////////////////
-    // FastWire 0.24
-    // This is a library to help faster programs to read I2C devices.
-    // Copyright(C) 2012
-    // Francesco Ferrara
-    //////////////////////
-    
-    /* Master */
-    #define TW_START                0x08
-    #define TW_REP_START            0x10
-
-    /* Master Transmitter */
-    #define TW_MT_SLA_ACK           0x18
-    #define TW_MT_SLA_NACK          0x20
-    #define TW_MT_DATA_ACK          0x28
-    #define TW_MT_DATA_NACK         0x30
-    #define TW_MT_ARB_LOST          0x38
-
-    /* Master Receiver */
-    #define TW_MR_ARB_LOST          0x38
-    #define TW_MR_SLA_ACK           0x40
-    #define TW_MR_SLA_NACK          0x48
-    #define TW_MR_DATA_ACK          0x50
-    #define TW_MR_DATA_NACK         0x58
-
-    #define TW_OK                   0
-    #define TW_ERROR                1
-
-    class Fastwire {
-        private:
-            static boolean waitInt();
-
-        public:
-            static void setup(int khz, boolean pullup);
-            static byte beginTransmission(byte device);
-            static byte write(byte value);
-            static byte writeBuf(byte device, byte address, byte *data, byte num);
-            static byte readBuf(byte device, byte address, byte *data, byte num);
-            static void reset();
-            static byte stop();
-    };
-#endif
-
-#if I2CDEV_IMPLEMENTATION == I2CDEV_BUILTIN_NBWIRE
-    // NBWire implementation based heavily on code by Gene Knight <Gene@Telobot.com>
-    // Originally posted on the Arduino forum at http://arduino.cc/forum/index.php/topic,70705.0.html
-    // Originally offered to the i2cdevlib project at http://arduino.cc/forum/index.php/topic,68210.30.html
-
-    #define NBWIRE_BUFFER_LENGTH 32
-    
-    class TwoWire {
-        private:
-            static uint8_t rxBuffer[];
-            static uint8_t rxBufferIndex;
-            static uint8_t rxBufferLength;
-        
-            static uint8_t txAddress;
-            static uint8_t txBuffer[];
-            static uint8_t txBufferIndex;
-            static uint8_t txBufferLength;
-        
-            // static uint8_t transmitting;
-            static void (*user_onRequest)(void);
-            static void (*user_onReceive)(int);
-            static void onRequestService(void);
-            static void onReceiveService(uint8_t*, int);
-    
-        public:
-            TwoWire();
-            void begin();
-            void begin(uint8_t);
-            void begin(int);
-            void beginTransmission(uint8_t);
-            //void beginTransmission(int);
-            uint8_t endTransmission(uint16_t timeout=0);
-            void nbendTransmission(void (*function)(int)) ;
-            uint8_t requestFrom(uint8_t, int, uint16_t timeout=0);
-            //uint8_t requestFrom(int, int);
-            void nbrequestFrom(uint8_t, int, void (*function)(int));
-            void send(uint8_t);
-            void send(uint8_t*, uint8_t);
-            //void send(int);
-            void send(char*);
-            uint8_t available(void);
-            uint8_t receive(void);
-            void onReceive(void (*)(int));
-            void onRequest(void (*)(void));
-    };
-    
-    #define TWI_READY   0
-    #define TWI_MRX     1
-    #define TWI_MTX     2
-    #define TWI_SRX     3
-    #define TWI_STX     4
-    
-    #define TW_WRITE    0
-    #define TW_READ     1
-    
-    #define TW_MT_SLA_NACK      0x20
-    #define TW_MT_DATA_NACK     0x30
-    
-    #define CPU_FREQ            16000000L
-    #define TWI_FREQ            100000L
-    #define TWI_BUFFER_LENGTH   32
-    
-    /* TWI Status is in TWSR, in the top 5 bits: TWS7 - TWS3 */
-    
-    #define TW_STATUS_MASK              (_BV(TWS7)|_BV(TWS6)|_BV(TWS5)|_BV(TWS4)|_BV(TWS3))
-    #define TW_STATUS                   (TWSR & TW_STATUS_MASK)
-    #define TW_START                    0x08
-    #define TW_REP_START                0x10
-    #define TW_MT_SLA_ACK               0x18
-    #define TW_MT_SLA_NACK              0x20
-    #define TW_MT_DATA_ACK              0x28
-    #define TW_MT_DATA_NACK             0x30
-    #define TW_MT_ARB_LOST              0x38
-    #define TW_MR_ARB_LOST              0x38
-    #define TW_MR_SLA_ACK               0x40
-    #define TW_MR_SLA_NACK              0x48
-    #define TW_MR_DATA_ACK              0x50
-    #define TW_MR_DATA_NACK             0x58
-    #define TW_ST_SLA_ACK               0xA8
-    #define TW_ST_ARB_LOST_SLA_ACK      0xB0
-    #define TW_ST_DATA_ACK              0xB8
-    #define TW_ST_DATA_NACK             0xC0
-    #define TW_ST_LAST_DATA             0xC8
-    #define TW_SR_SLA_ACK               0x60
-    #define TW_SR_ARB_LOST_SLA_ACK      0x68
-    #define TW_SR_GCALL_ACK             0x70
-    #define TW_SR_ARB_LOST_GCALL_ACK    0x78
-    #define TW_SR_DATA_ACK              0x80
-    #define TW_SR_DATA_NACK             0x88
-    #define TW_SR_GCALL_DATA_ACK        0x90
-    #define TW_SR_GCALL_DATA_NACK       0x98
-    #define TW_SR_STOP                  0xA0
-    #define TW_NO_INFO                  0xF8
-    #define TW_BUS_ERROR                0x00
-    
-    //#define _MMIO_BYTE(mem_addr) (*(volatile uint8_t *)(mem_addr))
-    //#define _SFR_BYTE(sfr) _MMIO_BYTE(_SFR_ADDR(sfr))
-    
-    #ifndef sbi // set bit
-        #define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
-    #endif // sbi
-    
-    #ifndef cbi // clear bit
-        #define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
-    #endif // cbi
-    
-    extern TwoWire Wire;
-
-#endif // I2CDEV_IMPLEMENTATION == I2CDEV_BUILTIN_NBWIRE
-
-#endif /* _I2CDEV_RDA_H_ */

KISS.cpp

@@ -0,0 +1,88 @@
+#include <HamShield.h>
+#include "AFSK.h"
+#include "KISS.h"
+
+//AFSK::Packet kissPacket;
+bool inFrame = false;
+uint8_t kissBuffer[PACKET_MAX_LEN];
+uint16_t kissLen = 0;
+
+// Inside the KISS loop, we basically wait for data to come in from the
+// KISS equipment, and look if we have anything to relay along
+void KISS::loop() {
+  static bool currentlySending = false;
+  if(radio->afsk.decoder.read() || radio->afsk.rxPacketCount()) {
+     // A true return means something was put onto the packet FIFO
+     // If we actually have data packets in the buffer, process them all now
+     while(radio->afsk.rxPacketCount()) {
+       AFSK::Packet *packet = radio->afsk.getRXPacket();
+       if(packet) {
+         writePacket(packet);
+         AFSK::PacketBuffer::freePacket(packet);
+       }
+     }
+   }
+   // Check if we have incoming data to turn into a packet
+   while(io->available()) {
+     uint8_t c = (uint8_t)io->read();
+     if(c == KISS_FEND) {
+       if(inFrame && kissLen > 0) {
+         int i;
+         AFSK::Packet *packet = AFSK::PacketBuffer::makePacket(PACKET_MAX_LEN);
+         packet->start();
+         for(i = 0; i < kissLen; i++) {
+           packet->appendFCS(kissBuffer[i]);
+         }
+         packet->finish();
+         radio->afsk.encoder.putPacket(packet);
+       }
+       kissLen = 0;
+       inFrame = false;
+     }
+     // We're inside the boundaries of a FEND
+     if(inFrame) {
+       // Unescape the incoming data
+       if(c == KISS_FESC) {
+         c = io->read();
+         if(c == KISS_TFESC) {
+           c = KISS_FESC;
+         } else {
+           c = KISS_FEND;
+         }
+       }
+       kissBuffer[kissLen++] = c;
+     }
+     if(kissLen == 0 && c != KISS_FEND) {
+       if((c & 0xf) == 0) // First byte<3:0> should be a 0, otherwise we're having options
+         inFrame = true;
+     }
+   }
+   if(radio->afsk.txReady()) {
+     radio->setModeTransmit();
+     currentlySending = true;
+     if(!radio->afsk.txStart()) { // Unable to start for some reason
+       radio->setModeReceive();
+       currentlySending = false;
+     }
+   }
+   if(currentlySending && radio->afsk.encoder.isDone()) {
+    radio->setModeReceive();
+    currentlySending = false;
+  }
+}
+
+void KISS::writePacket(AFSK::Packet *p) {
+  int i;
+  io->write(KISS_FEND);
+  io->write((uint8_t)0); // Host to TNC port identifier
+  for(i = 0; i < p->len-2; i++) {
+    char c = p->getByte(i);
+    if(c == KISS_FEND || c == KISS_FESC) {
+      io->write(KISS_FESC);
+      io->write((c==KISS_FEND?KISS_TFEND:KISS_TFESC));
+    } else {
+      io->write(c);
+    }
+  }
+  io->write(KISS_FEND);
+}

KISS.h

@@ -0,0 +1,35 @@
+#ifndef _KISS_H_
+#define _KISS_H_
+
+#include <HamShield.h>
+#include "AFSK.h"
+
+#define KISS_FEND 0xC0
+#define KISS_FESC 0xDB
+#define KISS_TFEND 0xDC
+#define KISS_TFESC 0xDD
+
+class KISS {
+public:
+  KISS(Stream *_io, HamShield *h, DDS *d) : io(_io), radio(h), dds(d) {}
+  bool read();
+  void writePacket(AFSK::Packet *);
+  void loop();
+  inline void isr() {
+    static uint8_t tcnt = 0;
+    TIFR1 = _BV(ICF1); // Clear the timer flag
+    dds->clockTick();
+    if(++tcnt == (DDS_REFCLK_DEFAULT/9600)) {
+      //PORTD |= _BV(2); // Diagnostic pin (D2)
+      radio->afsk.timer();
+      tcnt = 0;
+    }
+    //PORTD &= ~(_BV(2));
+  }
+private:
+  Stream *io;
+  HamShield *radio;
+  DDS *dds;
+};
+
+#endif /* _KISS_H_ */

LICENSE

@@ -0,0 +1,661 @@
+ GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+  A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+  The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community.  It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server.  Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+  An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU Affero General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
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+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
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README.md

@@ -2,3 +2,7 @@
 HamShield Arduino Library and Example Sketches
 
 This repository is meant to be checked out into your Arduino application's libraries folder. After reloading the application, the library and example sketches should be available for use.
+
+For overview, help, tricks, tips, and more, check out the wiki: 
+
+https://github.com/EnhancedRadioDevices/HamShield/wiki

SimpleFIFO.h

@@ -0,0 +1,89 @@
+#ifndef SimpleFIFO_h
+#define SimpleFIFO_h
+/*
+||
+|| @file 		SimpleFIFO.h
+|| @version 	1.2
+|| @author 	Alexander Brevig
+|| @contact 	alexanderbrevig@gmail.com
+||
+|| @description
+|| | A simple FIFO class, mostly for primitive types but can be used with classes if assignment to int is allowed
+|| | This FIFO is not dynamic, so be sure to choose an appropriate size for it
+|| #
+||
+|| @license
+|| | Copyright (c) 2010 Alexander Brevig
+|| | This library is free software; you can redistribute it and/or
+|| | modify it under the terms of the GNU Lesser General Public
+|| | License as published by the Free Software Foundation; version
+|| | 2.1 of the License.
+|| |
+|| | This library is distributed in the hope that it will be useful,
+|| | but WITHOUT ANY WARRANTY; without even the implied warranty of
+|| | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+|| | Lesser General Public License for more details.
+|| |
+|| | You should have received a copy of the GNU Lesser General Public
+|| | License along with this library; if not, write to the Free Software
+|| | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+|| #
+||
+*/
+template<typename T, int rawSize>
+class SimpleFIFO {
+public:
+	const int size;				//speculative feature, in case it's needed
+
+	SimpleFIFO();
+
+	T dequeue();				//get next element
+	bool enqueue( T element );	//add an element
+	T peek() const;				//get the next element without releasing it from the FIFO
+	void flush();				//[1.1] reset to default state 
+
+	//how many elements are currently in the FIFO?
+	unsigned char count() { return numberOfElements; }
+
+private:
+#ifndef SimpleFIFO_NONVOLATILE
+	volatile unsigned char numberOfElements;
+	volatile unsigned char nextIn;
+	volatile unsigned char nextOut;
+	volatile T raw[rawSize];
+#else
+	unsigned char numberOfElements;
+	unsigned char nextIn;
+	unsigned char nextOut;
+	T raw[rawSize];
+#endif
+};
+
+template<typename T, int rawSize>
+SimpleFIFO<T,rawSize>::SimpleFIFO() : size(rawSize) {
+	flush();
+}
+template<typename T, int rawSize>
+bool SimpleFIFO<T,rawSize>::enqueue( T element ) {
+	if ( count() >= rawSize ) { return false; }
+	numberOfElements++;
+	nextIn %= size;
+	raw[nextIn] = element;
+	nextIn++; //advance to next index
+	return true;
+}
+template<typename T, int rawSize>
+T SimpleFIFO<T,rawSize>::dequeue() {
+	numberOfElements--;
+	nextOut %= size;
+	return raw[ nextOut++];
+}
+template<typename T, int rawSize>
+T SimpleFIFO<T,rawSize>::peek() const {
+	return raw[ nextOut % size];
+}
+template<typename T, int rawSize>
+void SimpleFIFO<T,rawSize>::flush() {
+	nextIn = nextOut = numberOfElements = 0;
+}
+#endif

examples/AFSK-PacketTester/AFSK-PacketTester.ino

@@ -0,0 +1,132 @@
+/* Serial glue to send messages over APRS 
+ *  
+ *  To do: add message receive code
+ *  
+ */
+
+
+#define DDS_REFCLK_DEFAULT 9600
+
+#include <HamShield.h>
+#include <avr/wdt.h> 
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+
+HamShield radio;
+DDS dds;
+String messagebuff = "";
+String origin_call = "";
+String destination_call = "";
+String textmessage = "";
+int msgptr = 0;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  // turn on pwr to the radio
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.begin(115200);
+  
+  radio.initialize();
+  radio.frequency(144390);
+  radio.setRfPower(0);
+  dds.start();
+  radio.afsk.start(&dds);
+  delay(100);
+  Serial.println("HELLO");
+}
+
+String temp[1] = "";
+
+
+void loop() {
+  messagebuff = "KC7IBT,KC7IBT,:HAMSHIELD TEST";
+  prepMessage();
+  delay(10000);
+}
+    
+
+void prepMessage() { 
+   radio.setModeTransmit();
+   delay(500);
+   origin_call = messagebuff.substring(0,messagebuff.indexOf(','));                                          // get originating callsign
+   destination_call = messagebuff.substring(messagebuff.indexOf(',')+1,messagebuff.indexOf(',',messagebuff.indexOf(',')+1)); // get the destination call
+   textmessage = messagebuff.substring(messagebuff.indexOf(":")+1);
+   
+   Serial.print("From: "); Serial.print(origin_call); Serial.print(" To: "); Serial.println(destination_call); Serial.println("Text: "); Serial.println(textmessage);
+
+    AFSK::Packet *packet = AFSK::PacketBuffer::makePacket(22 + 32);
+
+    packet->start();
+    packet->appendCallsign(origin_call.c_str(),0);
+    packet->appendCallsign(destination_call.c_str(),15,true);   
+    packet->appendFCS(0x03);
+    packet->appendFCS(0xf0);
+    packet->print(textmessage);
+    packet->finish();
+ 
+    
+    bool ret = radio.afsk.putTXPacket(packet);
+
+    if(radio.afsk.txReady()) {
+      Serial.println(F("txReady"));
+      radio.setModeTransmit();
+      //delay(100);
+      if(radio.afsk.txStart()) {
+        Serial.println(F("txStart"));
+      } else {
+        radio.setModeReceive();
+      }
+    }
+    // Wait 2 seconds before we send our beacon again.
+    Serial.println("tick");
+    // Wait up to 2.5 seconds to finish sending, and stop transmitter.
+    // TODO: This is hackery.
+    for(int i = 0; i < 500; i++) {
+      if(radio.afsk.encoder.isDone())
+         break;
+      delay(50);
+    }
+    Serial.println("Done sending");
+    delay(3000);
+    radio.setModeReceive();
+} 
+ 
+ 
+ISR(TIMER2_OVF_vect) {
+  TIFR2 = _BV(TOV2);
+  static uint8_t tcnt = 0;
+  if(++tcnt == 8) {
+  digitalWrite(2, HIGH);
+  dds.clockTick();
+  digitalWrite(2, LOW);
+    tcnt = 0;
+  }
+}
+
+ISR(ADC_vect) {
+  static uint8_t tcnt = 0;
+  TIFR1 = _BV(ICF1); // Clear the timer flag
+  PORTD |= _BV(2); // Diagnostic pin (D2)
+  dds.clockTick();
+  if(++tcnt == 1) {
+    if(radio.afsk.encoder.isSending()) {
+      radio.afsk.timer();
+    }
+    tcnt = 0;
+  }
+  PORTD &= ~(_BV(2)); // Pin D2 off again
+}
+
+

examples/AFSK-SerialMessenger/AFSK-SerialMessenger.ino

@@ -0,0 +1,139 @@
+/* Serial glue to send messages over APRS 
+ *  
+ *  To do: add message receive code
+ *  
+ */
+
+
+#define DDS_REFCLK_DEFAULT 9600
+
+#include <HamShield.h>
+#include <avr/wdt.h> 
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
+DDS dds;
+String messagebuff = "";
+String origin_call = "";
+String destination_call = "";
+String textmessage = "";
+int msgptr = 0;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  // turn on the radio
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.begin(115200);
+
+  radio.initialize();
+  radio.frequency(145570);
+  radio.setRfPower(0);
+  dds.start();
+  radio.afsk.start(&dds);
+  delay(100);
+  Serial.println("HELLO");
+}
+
+String temp[1] = "";
+
+
+void loop() {
+    if(Serial.available()) { 
+      char temp = (char)Serial.read();
+      if(temp == '`') { 
+       prepMessage(); msgptr = 0; Serial.print("!!"); } 
+      else { 
+        messagebuff += temp;
+        msgptr++;
+      }
+    }
+    if(msgptr > 254) { messagebuff = ""; Serial.print("X!"); } 
+}
+    
+
+void prepMessage() { 
+   radio.setModeTransmit();
+   delay(500);
+   origin_call = messagebuff.substring(0,messagebuff.indexOf(','));        // get originating callsign
+   destination_call = messagebuff.substring(messagebuff.indexOf(',')+1,
+              messagebuff.indexOf(',',messagebuff.indexOf(',')+1)); // get the destination call
+   textmessage = messagebuff.substring(messagebuff.indexOf(":"));
+  
+    AFSK::Packet *packet = AFSK::PacketBuffer::makePacket(22 + 32);
+
+    packet->start();
+    packet->appendCallsign(origin_call.c_str(),0);
+    packet->appendCallsign(destination_call.c_str(),15,true);   
+    packet->appendFCS(0x03);
+    packet->appendFCS(0xf0);
+    packet->print(textmessage);
+    packet->finish();
+
+    textmessage = "";
+    
+    bool ret = radio.afsk.putTXPacket(packet);
+
+    if(radio.afsk.txReady()) {
+      Serial.println(F("txReady"));
+      //radio.setModeTransmit();
+      //delay(100);
+      if(radio.afsk.txStart()) {
+        Serial.println(F("txStart"));
+      } else {
+        radio.setModeReceive();
+      }
+    }
+    // Wait 2 seconds before we send our beacon again.
+    Serial.println("tick");
+    // Wait up to 2.5 seconds to finish sending, and stop transmitter.
+    // TODO: This is hackery.
+    for(int i = 0; i < 500; i++) {
+      if(radio.afsk.encoder.isDone())
+         break;
+      delay(50);
+    }
+    Serial.println("Done sending");
+    delay(3000);
+    radio.setModeReceive();
+} 
+ 
+
+// TODO: d2 is now our switch, so don't write to that
+ISR(TIMER2_OVF_vect) {
+  TIFR2 = _BV(TOV2);
+  static uint8_t tcnt = 0;
+  if(++tcnt == 8) {
+  //digitalWrite(2, HIGH);
+  dds.clockTick();
+  //digitalWrite(2, LOW);
+    tcnt = 0;
+  }
+}
+
+ISR(ADC_vect) {
+  static uint8_t tcnt = 0;
+  TIFR1 = _BV(ICF1); // Clear the timer flag
+  //PORTD |= _BV(2); // Diagnostic pin (D2)
+  dds.clockTick();
+  if(++tcnt == 1) {
+    if(radio.afsk.encoder.isSending()) {
+      radio.afsk.timer();
+    }
+    tcnt = 0;
+  }
+  //PORTD &= ~(_BV(2)); // Pin D2 off again
+}
+
+

examples/AFSKSend/AFSKSend.ino

@@ -0,0 +1,105 @@
+#include <HamShield.h>
+
+HamShield radio;
+DDS dds;
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+#define DON(p) PORTD |= _BV((p))
+#define DOFF(p) PORTD &= ~(_BV((p)))
+
+void setup() {
+  Serial.begin(9600);
+
+  pinMode(4, OUTPUT);
+  pinMode(5, OUTPUT);
+  pinMode(6, OUTPUT);
+  pinMode(7, OUTPUT);
+  
+    // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  // turn on pwr to the radio
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.println(F("Radio test connection"));
+  Serial.println(radio.testConnection(), DEC);
+  Serial.println(F("Initialize"));
+  delay(100);
+  radio.initialize();
+  Serial.println(F("Frequency"));
+  delay(100);
+  radio.frequency(145010);
+  //radio.setRfPower(0);
+  delay(100);
+  dds.start();
+  delay(100);
+  radio.afsk.start(&dds);
+  delay(100);
+  dds.setFrequency(0);
+  dds.on();
+  dds.setAmplitude(255);
+  I2Cdev::writeWord(A1846S_DEV_ADDR_SENLOW, 0x44, 0b0000011111111111);
+  //I2Cdev::writeWord(A1846S_DEV_ADDR_SENLOW, 0x53, 0x0);
+  //I2Cdev::writeWord(A1846S_DEV_ADDR_SENLOW, 0x32, 0xffff);
+}
+
+void loop() {
+  DON(6);
+    AFSK::Packet *packet = AFSK::PacketBuffer::makePacket(22 + 32);
+    packet->start();
+    packet->appendCallsign("VE6SLP",0);
+    packet->appendCallsign("VA6GA",15,true);
+    packet->appendFCS(0x03);
+    packet->appendFCS(0xf0);
+    packet->print(F("Hello "));
+    packet->print(millis());
+    packet->println(F("\r\nThis is a test of the HamShield Kickstarter prototype. de VE6SLP"));
+    packet->finish();
+    
+    bool ret = radio.afsk.putTXPacket(packet);
+
+    if(radio.afsk.txReady()) {
+      Serial.println(F("txReady"));
+      radio.setModeTransmit();
+      if(radio.afsk.txStart()) {
+        Serial.println(F("txStart"));
+      } else {
+        Serial.println(F("Tx Start failure"));
+        radio.setModeReceive();
+      }
+    }
+    // Wait 2 seconds before we send our beacon again.
+    Serial.println("tick");
+    // Wait up to 2.5 seconds to finish sending, and stop transmitter.
+    // TODO: This is hackery.
+    DOFF(6);
+    for(int i = 0; i < 500; i++) {
+      if(radio.afsk.encoder.isDone())
+         break;
+      delay(50);
+      Serial.println("Not done");
+    }
+    Serial.println("Done sending");
+    delay(100);
+    radio.setModeReceive();
+    delay(2000);
+}
+
+ISR(ADC_vect) {
+  TIFR1 = _BV(ICF1); // Clear the timer flag
+  DON(4);
+  dds.clockTick();
+  DON(5);
+  radio.afsk.timer();
+  DOFF(5);
+  DOFF(4);
+}

examples/APRSMessenger/background.js

@@ -0,0 +1,13 @@
+chrome.app.runtime.onLaunched.addListener(function() {
+  chrome.app.window.create("window.html", {
+    "bounds": {
+        "width": 685,
+        "height": 800
+    }
+    });
+});
+
+  $(function() {
+    $( "#tabs" ).tabs();
+  });
+

examples/APRSMessenger/manifest.json

@@ -0,0 +1,10 @@
+{
+  "name": "HamShield",
+  "description": "HamShield",
+  "version": "1.0.0",
+  "app": {
+    "background": {
+        "scripts": ["background.js"]
+    }
+  }
+ }

examples/APRSMessenger/project.ps

@@ -0,0 +1 @@
+chromeApp

examples/APRSMessenger/styles.css

@@ -0,0 +1,48 @@
+body{
+  display: inline-block;  
+}
+
+.btn {
+  background: #adadad;
+  background-image: -webkit-linear-gradient(top, #adadad, #3d3d3d);
+  background-image: -moz-linear-gradient(top, #adadad, #3d3d3d);
+  background-image: -ms-linear-gradient(top, #adadad, #3d3d3d);
+  background-image: -o-linear-gradient(top, #adadad, #3d3d3d);
+  background-image: linear-gradient(to bottom, #adadad, #3d3d3d);
+  -webkit-border-radius: 0;
+  -moz-border-radius: 0;
+  border-radius: 0px;
+  font-family: Arial;
+  color: #ffffff;
+  font-size: 20px;
+  padding: 10px 20px 10px 20px;
+  text-decoration: none;
+  float: left;
+  text-align:center;
+}
+
+.btn:hover {
+  background: #3d3d3d;
+  text-decoration: none;
+}
+
+.lcd {
+  -webkit-border-radius: 0;
+  -moz-border-radius: 0;
+  border-radius: 0px;
+  font-family: Courier New;
+  color: #00ff00;
+  font-size: 50px;
+  background: #000000;
+  padding: 10px 20px 10px 20px;
+  text-decoration: none;
+  width: 500px;
+}
+
+.lcd:hover {
+  text-decoration: none;
+}
+
+.bs1 { width: 50px; }
+.bs2 { width: 100px; }
+.bs3 { width: 200px; }

examples/APRSMessenger/window.html

@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <link rel="stylesheet" type="text/css" href="styles.css">
+  <meta charset="utf-8">
+  <title>APRSMessenger</title>
+  <link rel="stylesheet" href="jquery-ui.css">
+  <script src="jquery-1.10.2.js"></script>
+  <script src="jquery-ui.js"></script>
+</head>
+  <body>
+    <div class="lcd" style="width: 768px">
+       144.390 MHz | APRS | <img src="bars-3.png" style="height: 32px; width: 32px;">
+    </div>
+    <div class="lcd" style="width: 768px; font-size: 15px;">
+      2M | BW: 25KHz | TX CTCSS: OFF | RX CTCSS: OFF | Filter: OFF | Presence: Available 
+    </div>
+    <div class="btn" style="width: 75px">
+       Tune
+    </div>
+    <div class="btn">
+       Presence
+    </div>
+    <div class="btn">
+      GPS
+    </div>
+    <div class="btn">
+      SSTV
+    </div>
+    <div class="btn">
+      WX
+    </div>
+    <div class="btn">
+      MSG
+    </div>
+    <div class="btn">
+      SQ-
+    </div>
+    <div class="btn">
+      SQ+
+    </div>
+    <div class="btn">
+      VOL
+    </div>
+    <br/><br/>
+    <div id="tabs">
+     <ul>
+       <li><a href="#tabs-1">Console</a></li>
+       <li><a href="#tabs-2">KG7OGM</a></li>
+       <li><a href="#tabs-3">KC7IBT</a></li>
+     </ul>
+    </div>
+    <div id="tabs-1">
+      Debug messages
+    </div>
+    <div id="tabs-2">
+    </div>
+    <div id="tabs-3">
+    </div>
+  </body>
+</html>

examples/AX25Receive/AX25Receive.ino

@@ -0,0 +1,77 @@
+#include <HamShield.h>
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
+DDS dds;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  // turn on radio
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.begin(9600);
+
+  Serial.println(F("Radio test connection"));
+  Serial.println(radio.testConnection(), DEC);
+  Serial.println(F("Initialize"));
+  delay(100);
+  radio.initialize();
+  radio.frequency(145010);
+  radio.setSQOff();
+  I2Cdev::writeWord(A1846S_DEV_ADDR_SENLOW, 0x44, 0b11111111);
+  Serial.println(F("Frequency"));
+  delay(100);
+  Serial.print(F("Squelch(H/L): "));
+  Serial.print(radio.getSQHiThresh());
+  Serial.print(F(" / "));
+  Serial.println(radio.getSQLoThresh());
+  radio.setModeReceive();
+  Serial.print(F("RX? "));
+  Serial.println(radio.getRX());
+  Serial.println(F("DDS Start"));
+  delay(100);
+  dds.start();
+  Serial.println(F("AFSK start"));
+  delay(100);
+  radio.afsk.start(&dds);
+  Serial.println(F("Starting..."));
+  delay(100);
+  dds.setAmplitude(255);
+}
+
+uint32_t last = 0;
+void loop() {
+   if(radio.afsk.decoder.read() || radio.afsk.rxPacketCount()) {
+      // A true return means something was put onto the packet FIFO
+      // If we actually have data packets in the buffer, process them all now
+      while(radio.afsk.rxPacketCount()) {
+        AFSK::Packet *packet = radio.afsk.getRXPacket();
+        Serial.print(F("Packet: "));
+        if(packet) {
+          packet->printPacket(&Serial);
+          AFSK::PacketBuffer::freePacket(packet);
+        }
+      }
+    }
+}
+
+//TODO: d2 is the switch input, so remove this
+ISR(ADC_vect) {
+  static uint8_t tcnt = 0;
+  TIFR1 = _BV(ICF1); // Clear the timer flag
+  //PORTD |= _BV(2); // Diagnostic pin (D2)
+  //dds.clockTick();
+  radio.afsk.timer();
+  //PORTD &= ~(_BV(2)); // Pin D2 off again
+}

examples/CrystalCalibration/CrystalCalibration.ino

@@ -0,0 +1,269 @@
+#define DDS_REFCLK_DEFAULT 38400
+#define DDS_REFCLK_OFFSET  0
+#define DDS_DEBUG_SERIAL
+
+#include <HamShield.h>
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
+DDS dds;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  // turn on radio
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.begin(9600);
+
+  radio.initialize();
+  radio.setRfPower(0);
+  radio.setFrequency(145050);
+  
+  dds.start();
+  dds.setFrequency(1200);
+  dds.on();
+  
+  radio.bypassPreDeEmph();
+}
+
+enum Sets {
+  SET_REF,
+  SET_TONE,
+  SET_AMPLITUDE,
+  SET_ADC_HALF,
+  SET_OFFSET
+} setting = SET_TONE;
+
+char freqBuffer[8];
+char *freqBufferPtr = freqBuffer;
+uint16_t lastFreq = 1200;
+
+volatile uint16_t recordedPulseLength;
+volatile bool recordedPulse = false;
+volatile bool listening = false;
+volatile uint8_t maxADC = 0, minADC = 255, adcHalf = 40;
+
+void loop() {
+  static uint16_t samples = 0;
+  static uint16_t pulse;
+  static uint32_t lastOutput = 0;
+  static float pulseFloat = 0.0;
+  if(recordedPulse) {
+    uint32_t pulseAveraging;
+    uint16_t tmpPulse;
+    cli();
+    recordedPulse = false;
+    tmpPulse = recordedPulseLength;
+    sei();
+    if(samples++ == 0) {
+      pulse = tmpPulse;
+      //pulseFloat = tmpPulse;
+    } else {
+      pulseAveraging = (pulse + tmpPulse) >> 1;
+      pulse = pulseAveraging;
+      pulseFloat = pulseFloat + 0.01*((float)pulse-pulseFloat);
+    }
+    if((lastOutput + 1000) < millis()) {
+      Serial.print(F("Pulse:   "));
+      Serial.println(pulse);
+      Serial.print(F("Last:    "));
+      Serial.println(tmpPulse);
+      Serial.print(F("Samples: "));
+      Serial.println(samples);
+      Serial.print(F("ADC M/M: "));
+      Serial.print(minADC); minADC = 255;
+      Serial.print(F(" / "));
+      Serial.println(maxADC); maxADC = 0;
+      Serial.print(F("Freq:    "));
+      // F = 1/(pulse*(1/ref))
+      // F = ref/pulse
+      Serial.print((float)((float)dds.getReferenceClock()+(float)dds.getReferenceOffset())/(float)pulse);
+      Serial.print(F(" / "));
+      Serial.print((float)((float)dds.getReferenceClock()+(float)dds.getReferenceOffset())/pulseFloat);
+      Serial.print(F(" / "));
+      Serial.println(pulseFloat);
+      Serial.print(F("Freq2:   "));
+      // F = 1/(pulse*(1/ref))
+      // F = ref/pulse
+      Serial.print((float)dds.getReferenceClock()/(float)pulse);
+      Serial.print(F(" / "));
+      Serial.println((float)dds.getReferenceClock()/pulseFloat);
+      samples = 0;
+      lastOutput = millis();
+    }
+  }
+  while(Serial.available()) {
+    char c = Serial.read();
+    Serial.print(c);
+    switch(c) {
+      case 'h':
+        Serial.println(F("Commands:"));
+        Serial.println(F("RefClk: u = +10, U = +100, r XXXX = XXXX"));
+        Serial.println(F("        d = -10, D = -100"));
+        Serial.println(F("Offset: s XXX = Set refclk offset"));
+        Serial.println(F("Radio:  T = transmit, R = receive"));
+        Serial.println(F("Tone:   t XXXX = XXXX Hz"));
+        Serial.println(F("Amp.:   a XXX  = XXX out of 255"));
+        Serial.println(F("DDS:    o = On, O = Off"));
+        Serial.println(F("Input:  l = Determine received frequency, L = stop"));
+        Serial.println(F("ADC:    m XXX = Set ADC midpoint (zero crossing level)"));
+        Serial.println(F("ie. a 31 = 32/255 amplitude, r38400 sets 38400Hz refclk"));
+        Serial.println("> ");
+        break;
+      case 'u':
+        dds.setReferenceClock(dds.getReferenceClock()+10);
+        dds.setFrequency(lastFreq);
+        dds.start();
+        Serial.println(F("RefClk + 10 = "));
+        Serial.println(dds.getReferenceClock());
+        Serial.println("> ");
+        break;
+      case 'U':
+        dds.setReferenceClock(dds.getReferenceClock()+100);
+        dds.setFrequency(lastFreq);
+        dds.start();
+        Serial.println(F("RefClk + 100 = "));
+        Serial.println(dds.getReferenceClock());
+        Serial.println("> ");
+        break;
+      case 'd':
+        dds.setReferenceClock(dds.getReferenceClock()-10);
+        dds.setFrequency(lastFreq);
+        dds.start();
+        Serial.println(F("RefClk - 10 = "));
+        Serial.println(dds.getReferenceClock());
+        Serial.println("> ");
+        break;
+      case 'D':
+        dds.setReferenceClock(dds.getReferenceClock()-100);
+        dds.setFrequency(lastFreq);
+        dds.start();
+        Serial.println(F("RefClk - 100 = "));
+        Serial.println(dds.getReferenceClock());
+        Serial.println("> ");
+        break;
+      case 'l':
+        Serial.println(F("Start frequency listening, DDS off"));
+        dds.off();
+        listening = true;
+        lastOutput = millis();
+        Serial.println("> ");
+        break;
+      case 'L':
+        Serial.println(F("Stop frequency listening, DDS on"));
+        listening = false;
+        samples = 0;
+        dds.on();
+        Serial.println("> ");
+        break;
+      case 'T':
+        Serial.println(F("Radio transmit"));
+        radio.setModeTransmit();
+        Serial.println("> ");
+        break;
+      case 'R':
+        Serial.println(F("Radio receive"));
+        radio.setModeReceive();
+        Serial.println("> ");
+        break;
+      case 'r':
+        setting = SET_REF;
+        break;
+      case 't':
+        setting = SET_TONE;
+        break;
+      case 'a':
+        setting = SET_AMPLITUDE;
+        break;
+      case 'm':
+        setting = SET_ADC_HALF;
+        break;
+      case 's':
+        setting = SET_OFFSET;
+        break;
+      case 'o':
+        dds.on();
+        Serial.println("> ");
+        break;
+      case 'O':
+        dds.off();
+        Serial.println("> ");
+        break;
+      default:
+        if(c == '-' || (c >= '0' && c <= '9')) {
+          *freqBufferPtr = c;
+          freqBufferPtr++;
+        }
+        if((c == '\n' || c == '\r') && freqBufferPtr != freqBuffer) {
+          *freqBufferPtr = '\0';
+          freqBufferPtr = freqBuffer;
+          uint16_t freq = atoi(freqBuffer);
+          if(setting == SET_REF) {
+            dds.setReferenceClock(freq);
+            dds.setFrequency(lastFreq);
+            dds.start();
+            Serial.print(F("New Reference Clock: "));
+            Serial.println(dds.getReferenceClock());
+          } else if(setting == SET_TONE) {
+            dds.setFrequency(freq);
+            lastFreq = freq;
+            Serial.print(F("New Tone: "));
+            Serial.println(freq);
+          } else if(setting == SET_AMPLITUDE) {
+            dds.setAmplitude((uint8_t)(freq&0xFF));
+            Serial.print(F("New Amplitude: "));
+            Serial.println((uint8_t)(freq&0xFF));
+          } else if(setting == SET_ADC_HALF) {
+            adcHalf = freq&0xFF;
+            Serial.print(F("ADC midpoint set to "));
+            Serial.println((uint8_t)(freq&0xFF));
+          } else if(setting == SET_OFFSET) {
+            dds.setReferenceOffset((int16_t)atoi(freqBuffer));
+            dds.setFrequency(lastFreq);
+            Serial.print(F("Refclk offset: "));
+            Serial.println(dds.getReferenceOffset());
+          }
+          Serial.println("> ");
+        }
+        break;
+    }
+  }
+}
+
+ISR(ADC_vect) {
+  static uint16_t pulseLength = 0;
+  static uint8_t lastADC = 127;
+  cli();
+  TIFR1 = _BV(ICF1);
+  //PORTD |= _BV(2);
+  dds.clockTick();
+  sei();
+  if(listening) {
+    pulseLength++;
+    if(ADCH >= adcHalf && lastADC < adcHalf) {
+      // Zero crossing, upward
+      recordedPulseLength = pulseLength;
+      recordedPulse = true;
+      pulseLength = 0;
+    }
+    if(minADC > ADCH) {
+      minADC = ADCH;
+    }
+    if(maxADC < ADCH) {
+      maxADC = ADCH;
+    }
+    lastADC = ADCH;
+  }
+  //PORTD &= ~_BV(2);
+}

examples/DDS/DDS.ino

@@ -0,0 +1,57 @@
+#define DDS_REFCLK_DEFAULT 9600
+#include <HamShield.h>
+
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
+DDS dds;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  // turn on radio
+  digitalWrite(RESET_PIN, HIGH);
+  
+  radio.initialize();
+  radio.setRfPower(0);
+  radio.setFrequency(145060);
+  radio.setModeTransmit();
+  dds.start();
+  dds.playWait(600, 3000);
+  dds.on();
+  //dds.setAmplitude(31);
+}
+
+void loop() {
+  dds.setFrequency(2200);
+  delay(1000);
+  dds.setFrequency(1200);
+  delay(1000);
+}
+
+#ifdef DDS_USE_ONLY_TIMER2
+ISR(TIMER2_OVF_vect) {
+  dds.clockTick();
+}
+#else // Use the ADC timer instead
+ISR(ADC_vect) {
+  static unsigned char tcnt = 0;
+  TIFR1 = _BV(ICF1); // Clear the timer flag
+  if(++tcnt == 4) {
+    //digitalWrite(2, HIGH);
+    tcnt = 0;
+  }
+  dds.clockTick();
+  //digitalWrite(2, LOW);
+}
+#endif

examples/FMBeacon/FMBeacon.ino

@@ -5,24 +5,35 @@ Test beacon will transmit and wait 30 seconds.
 Beacon will check to see if the channel is clear before it will transmit.
 */
 
-// Include the HamSheild and Wire (I2C) libraries
+// Include the HamSheild
 #include <HamShield.h>
-#include <Wire.h>
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
 
 // Create a new instance of our HamSheild class, called 'radio'
 HamShield radio;
 
 // Run our start up things here
 void setup() { 
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
   // Set up the serial port at 9600 Baud
   Serial.begin(9600);
   
   // Send a quick serial string
   Serial.println("HamShield FM Beacon Example Sketch");
 
-  // Start the Wire (I2C) library
-  Wire.begin();
-
   // Query the HamShield for status information
   Serial.print("Radio status: ");
   int result = radio.testConnection();
@@ -30,16 +41,16 @@ void setup() {
   
   // Tell the HamShield to start up
   radio.initialize();
-  
+  radio.setRfPower(0);
   // Configure the HamShield to transmit and recieve on 446.000MHz
-  radio.frequency(446000);
+  radio.frequency(145570);
   
   Serial.println("Radio Configured.");
 }
 
 void loop() {
   // We'll wait up to 30 seconds for a clear channel, requiring that the channel is clear for 2 seconds before we transmit
-  if (radio.waitForChannel(30000,2000,-50)) {
+  if (radio.waitForChannel(30000,2000,-5)) {
     // If we get here, the channel is clear. Let's print the RSSI to the serial port as well.
     Serial.print("Signal is clear, RSSI: ");
     Serial.println(radio.readRSSI());
@@ -49,14 +60,14 @@ void loop() {
     radio.setModeTransmit();
     
     // Send a message out in morse code
-    radio.morseOut("CALLSIGN LOCATOR ARDUINO HAMSHIELD");
+    radio.morseOut("KC7IBT ARDUINO HAMSHIELD");
     
     // We're done sending the message, set the radio back into recieve mode.
     radio.setModeReceive();
     Serial.println("Done.");
     
     // Wait 30 seconds before we send our beacon again.
-    delay(30000);    
+    delay(1000);    
   } else {
     // If we get here, the channel is busy. Let's also print out the RSSI.
     Serial.print("The channel was busy. Waiting 10 seconds. RSSI: ");

examples/FoxHunt/FoxHunt.ino

@@ -1,7 +1,10 @@
 /* Fox Hunt */
 
-#include <HAMShield.h>
+#include <HamShield.h>
-#include <Wire.h>
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
 
 // transmit for 1 minute, every 10 minutes 
 
@@ -9,18 +12,28 @@
 #define INTERVAL 10
 #define RANDOMCHANCE 3
 
-HAMShield radio;
+HamShield radio;
 
 void setup() {
-  Wire.begin();
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
   radio.initialize();
-  radio.setFrequency(145510);
+  radio.frequency(145510);
   radio.setModeReceive();
 }
 
 void loop() {
    waitMinute(INTERVAL + random(0,RANDOMCHANCE));     // wait before transmitting, randomly up to 3 minutes later
-   if(radio.waitForChannel(30000,2000)) {             // wait for a clear channel, abort after 30 seconds, wait 2 seconds of dead air for breakers
+   if(radio.waitForChannel(30000,2000, -90)) {             // wait for a clear channel, abort after 30 seconds, wait 2 seconds of dead air for breakers
      radio.setModeTransmit();                         // turn on transmit mode
      tone(1000,11,TRANSMITLENGTH * 60 * 1000);        // play a long solid tone
      radio.morseOut("1ZZ9ZZ/B FOXHUNT");              // identify the fox hunt transmitter
@@ -34,4 +47,3 @@ void waitMinute(int period) {
   delay(period * 60 * 1000);
 }
 
-

examples/FunctionalTest/FunctionalTest.ino

@@ -0,0 +1,69 @@
+/* HamShield Functional Test */
+
+#include <HamShield.h>
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.begin(9600);
+  Serial.println("If the sketch freezes at radio status, there is something wrong with power or the shield");
+  Serial.print("Radio status: ");
+  int result = radio.testConnection();
+  Serial.println(result,DEC);
+  Serial.println("Setting radio to its defaults..");
+  radio.initialize();
+}
+
+void loop() {
+  radio.setModeReceive();
+  radio.setSQLoThresh(0);
+  radio.setSQOn();
+  radio.setVolume1(0xF);
+  radio.setVolume2(0xF);
+  delay(1000);
+  Serial.println("Changing frequency to 446.000 and waiting 10 seconds. You should hear static fading in.");
+    radio.frequency(446000);
+  for(int x = 0; x < 16; x++) { radio.setVolume1(x); delay(500); Serial.print(x); Serial.print(".."); } 
+  for(int x = 0; x < 16; x++) { radio.setVolume2(x); delay(500); Serial.print(x); Serial.print(".."); }   
+      radio.setVolume1(0xF);
+    radio.setVolume2(0xF);
+
+  delay(10000);
+  Serial.println("Changing frequency to 450.000 and waiting 10 seconds. You should hear static.");
+  radio.frequency(446000);
+  delay(10000);
+  Serial.println("Changing frequency to 220.000 and waiting 10 seconds. you should hear static.");
+  radio.frequency(220000);
+  delay(10000);
+  Serial.println("Changing frequency to 144.520 and waiting 10 seconds. you should hear static.");
+  radio.frequency(144520);
+  delay(10000);
+  Serial.println("Now lets scan for a weather radio station and listen for a while....");
+  radio.setWXChannel(radio.scanWXChannel());
+  Serial.println("If you hear weather radio, it means the scanWXChannel() and setWXChannel() and VHF works.");
+  Serial.println("We will sit here for 30 seconds because weather is important.");
+  delay(30000);
+  Serial.println("We will now tune to 446.000 and send morse code");
+  radio.frequency(446000);
+  radio.setModeTransmit();
+  radio.morseOut("HELLO PERSON");
+  radio.setModeReceive();
+  Serial.println("Now we are receiving on the call frequency. Starting over again.");
+ 
+}
+

examples/Gauges/Gauges.ino

@@ -7,10 +7,13 @@ Simple gauges for the radio receiver.
 
 */
 
-#include <HAMShield.h>
+#include <HamShield.h>
-#include <Wire.h>
 
-HAMShield radio;
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
 
 void clr() { 
 /* Serial.write(27);
@@ -20,9 +23,20 @@ void clr() {
 }
 
 void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
   analogReference(DEFAULT);
   Serial.begin(115200);
-  Wire.begin();
+
   Serial.print("Radio status: ");
   int result = radio.testConnection();
   Serial.println(result,DEC); 

examples/HAMBot/HAMBot.ino

@@ -1,17 +1,31 @@
 /* Simple DTMF controlled HAM Radio Robot */
 
 #include <ArduinoRobot.h> // include the robot library
-#include <HAMShield.h>
+#include <HamShield.h>
-#include <Wire.h>
 #include <SPI.h>
 
-HAMShield radio;
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
 
 void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
   Robot.begin();
-  Wire.begin();
+
   radio.initialize();
-  radio.setFrequency(145510);
+  radio.frequency(145510);
 }
 
 void loop() {

examples/HandyTalkie/HandyTalkie.ino

@@ -0,0 +1,132 @@
+// Hamshield 
+
+#include <HamShield.h>
+
+// create object for radio
+HamShield radio;
+
+#define LED_PIN 13
+#define RSSI_REPORT_RATE_MS 5000
+
+//TODO: move these into library
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+bool blinkState = false;
+bool currently_tx;
+
+uint32_t freq;
+
+unsigned long rssi_timeout;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, LOW);
+  
+  
+  // initialize serial communication
+  Serial.begin(9600);
+  Serial.println("press the switch to begin...");
+  
+  while (digitalRead(SWITCH_PIN));
+  
+  // let the AU ot of reset
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.println("beginning radio setup");
+
+  // verify connection
+  Serial.println("Testing device connections...");
+  Serial.println(radio.testConnection() ? "RDA radio connection successful" : "RDA radio connection failed");
+
+  // initialize device
+  Serial.println("Initializing I2C devices...");
+  radio.initialize(); // initializes automatically for UHF 12.5kHz channel
+
+  Serial.println("setting default Radio configuration");
+  radio.dangerMode();
+
+  // set frequency
+  Serial.println("changing frequency");
+  
+  radio.setSQOff();
+  freq = 446000;
+  radio.frequency(freq);
+  
+  // set to receive
+  
+  radio.setModeReceive();
+  currently_tx = false;
+  Serial.print("config register is: ");
+  Serial.println(radio.readCtlReg());
+  Serial.println(radio.readRSSI());
+  
+/*
+  // set to transmit
+  radio.setModeTransmit();
+  // maybe set PA bias voltage
+  Serial.println("configured for transmit");
+  radio.setTxSourceMic();
+  
+  
+  */  
+  radio.setRfPower(0);
+    
+  // configure Arduino LED for
+  pinMode(LED_PIN, OUTPUT);
+  rssi_timeout = 0;
+
+}
+
+void loop() {  
+  if (!digitalRead(SWITCH_PIN))
+  {
+    if (!currently_tx) 
+    {
+      currently_tx = true;
+      
+      // set to transmit
+      radio.setModeTransmit();
+      Serial.println("Tx");
+      //radio.setTxSourceMic();
+      //radio.setRfPower(1);
+    }
+  } else if (currently_tx) {
+    radio.setModeReceive();
+    currently_tx = false;
+    Serial.println("Rx");
+  }
+  
+  
+  if (Serial.available()) {
+    if (Serial.peek() == 'r') {
+      Serial.read();
+      digitalWrite(RESET_PIN, LOW);
+      delay(1000);
+      digitalWrite(RESET_PIN, HIGH);
+      radio.initialize(); // initializes automatically for UHF 12.5kHz channel
+    } else {
+      Serial.setTimeout(40);
+      freq = Serial.parseInt();
+      Serial.flush();
+      radio.frequency(freq);
+      Serial.print("set frequency: ");
+      Serial.println(freq);
+    }
+  }
+  
+  if (!currently_tx && (millis() - rssi_timeout) > RSSI_REPORT_RATE_MS)
+  {
+    Serial.println(radio.readRSSI());
+    rssi_timeout = millis();
+  }
+}

examples/Identifier/Identifier.ino

@@ -6,12 +6,16 @@ Arduino audio overlay example
 
 */
 
-#include <HAMShield.h>
+
-#include <Wire.h>
+#include <HamShield.h>
 
 #define DOT 100
 
-HAMShield radio;
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
 
 const char *bascii = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.,?'!/()&:;=+-_\"$@",
   *bitu[] = { ".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--..","-----",".----","..---","...--","....-",".....","-....","--...","---..","----.",".-.-.-","--..--","..--..",".----.","-.-.--","-..-.","-.--.","-.--.-",".-...","---...","-.-.-.","-...-",".-.-.","-....-","..--.-",".-..-.","...-..-",".--.-."
@@ -22,14 +26,25 @@ const char *callsign = {"1ZZ9ZZ/B"} ;
 char morsebuffer[8];  
   
 void setup() {
+// NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
   Serial.begin(9600);
   Serial.println("starting up..");
-  Wire.begin();
+
   Serial.print("Radio status: ");
   int result = radio.testConnection();
   Serial.println(result,DEC);
   radio.initialize();
-  radio.setFrequency(446000);
+  radio.frequency(446000);
   radio.setVolume1(0xF);
   radio.setVolume2(0xF);
   radio.setModeReceive();

examples/JustTransmit/JustTransmit.ino

@@ -0,0 +1,41 @@
+/* Just Transmit */
+
+#include <HamShield.h>
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.begin(9600);
+  Serial.println("If the sketch freezes at radio status, there is something wrong with power or the shield");
+  Serial.print("Radio status: ");
+  int result = radio.testConnection();
+  Serial.println(result,DEC);
+  Serial.println("Setting radio to its defaults..");
+  radio.initialize();
+  radio.setRfPower(0);
+  radio.setChanMode(3);
+}
+
+void loop() {
+  radio.bypassPreDeEmph();
+  radio.frequency(144000);
+  // radio.setTxSourceNone();
+  radio.setModeTransmit();
+  for(;;) { }
+}
+

examples/KISS/KISS.ino

@@ -0,0 +1,47 @@
+#include <HamShield.h>
+#include <KISS.h>
+
+HamShield radio;
+DDS dds;
+KISS kiss(&Serial, &radio, &dds);
+
+//TODO: move these into library
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, LOW);
+  
+  Serial.begin(9600);
+  
+  while (digitalRead(SWITCH_PIN));
+  
+  // let the AU ot of reset
+  digitalWrite(RESET_PIN, HIGH);
+  
+  radio.initialize();
+  radio.setSQOff();
+  radio.setFrequency(144390);
+  //I2Cdev::writeWord(A1846S_DEV_ADDR_SENLOW, 0x44, 0x05FF);
+
+  dds.start();
+  radio.afsk.start(&dds);
+}
+
+void loop() {
+  kiss.loop();
+}
+
+ISR(ADC_vect) {
+  kiss.isr();
+}

examples/PSK31Transmit/PSK31Transmit.ino

@@ -0,0 +1,105 @@
+#include <HamShield.h>
+#include "varicode.h"
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+DDS dds;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.begin(9600);
+  // put your setup code here, to run once:
+  dds.setReferenceClock(32000);
+  dds.start();
+  dds.setFrequency(1000);
+  dds.on();
+}
+
+volatile bool sent = true;
+volatile uint16_t bitsToSend = 0;
+volatile uint8_t zeroCount = 0;
+
+void sendChar(uint8_t c) {
+  uint16_t bits = varicode[c];
+  while((bits&0x8000)==0) {
+    bits<<=1;
+  }
+  while(!sent) {} //delay(32);
+  cli();
+  sent = false;
+  bitsToSend = bits;
+  sei();
+  while(!sent) {} //delay(32);
+  //PORTD &= ~_BV(2); // Diagnostic pin (D2)
+}
+
+char *string = "Why hello there, friend. Nice to meet you. Welcome to PSK31. 73, VE6SLP sk\r\n";
+void loop() {
+  int i;
+  // put your main code here, to run repeatedly:
+  //for(i = 0; i<5; i++)
+  //  sendChar(0);
+  //  return;
+  for(i = 0; i < strlen(string); i++) {
+    sendChar(string[i]);
+    //Serial.println(string[i]);
+  }
+}
+
+const uint8_t amplitudeShape[41] = {
+  255, 241, 228, 215, 203, 191, 181, 171, 161, 152, 143, 135, 128, 121, 114, 107, 101, 96, 90, 85, 80, 76, 72, 68, 64, 60, 57, 54, 51, 48, 45, 42, 40, 38, 36, 34, 32, 30, 28, 27, 25
+};
+
+// This will trigger at 8kHz
+ISR(ADC_vect) {
+  static uint8_t outer = 0;
+  static uint8_t tcnt = 0;
+  TIFR1 |= _BV(ICF1);
+  // Wave shaping
+  // TODO: Improve how this would perform.
+  //else if(tcnt > (255-64))
+  //  dds.setAmplitude((255 - tcnt));
+  //else dds.setAmplitude(255);
+  if(tcnt < 81)
+    dds.setAmplitude(amplitudeShape[(81-tcnt)/2]);
+  if(tcnt > (255-81))
+    dds.setAmplitude(amplitudeShape[(tcnt-174)/2]);
+  dds.clockTick();
+  //PORTD &= ~_BV(2);
+  if(outer++ == 3) {
+    outer = 0;
+  } else {
+    return;
+  }
+  if(tcnt++ == 0) { // Next bit
+    //PORTD ^= _BV(2); // Diagnostic pin (D2)
+    if(!sent) {
+      if((bitsToSend & 0x8000) == 0) {
+        zeroCount++;
+        dds.changePhaseDeg(+180);
+      } else {
+        zeroCount = 0;
+      }
+      bitsToSend<<=1;
+      if(zeroCount == 2) {
+        sent = true;
+      }
+    } else {
+      // Idle on zeroes
+      dds.changePhaseDeg(+180);
+    }
+  }
+  //PORTD &= ~_BV(2);
+}

examples/PSK31Transmit/varicode.h

@@ -0,0 +1,130 @@
+const uint16_t varicode[] = {
+0xAAC0, // ASCII =   0  1010101011
+0xB6C0, // ASCII =   1  1011011011
+0xBB40, // ASCII =   2  1011101101
+0xDDC0, // ASCII =   3  1101110111
+0xBAC0, // ASCII =   4  1011101011
+0xD7C0, // ASCII =   5  1101011111
+0xBBC0, // ASCII =   6  1011101111
+0xBF40, // ASCII =   7  1011111101
+0xBFC0, // ASCII =   8  1011111111
+0xEF00, // ASCII =   9  11101111
+0xE800, // ASCII =  10  11101
+0xDBC0, // ASCII =  11  1101101111
+0xB740, // ASCII =  12  1011011101
+0xF800, // ASCII =  13  11111
+0xDD40, // ASCII =  14  1101110101
+0xEAC0, // ASCII =  15  1110101011
+0xBDC0, // ASCII =  16  1011110111
+0xBD40, // ASCII =  17  1011110101
+0xEB40, // ASCII =  18  1110101101
+0xEBC0, // ASCII =  19  1110101111
+0xD6C0, // ASCII =  20  1101011011
+0xDAC0, // ASCII =  21  1101101011
+0xDB40, // ASCII =  22  1101101101
+0xD5C0, // ASCII =  23  1101010111
+0xDEC0, // ASCII =  24  1101111011
+0xDF40, // ASCII =  25  1101111101
+0xEDC0, // ASCII =  26  1110110111
+0xD540, // ASCII =  27  1101010101
+0xD740, // ASCII =  28  1101011101
+0xEEC0, // ASCII =  29  1110111011
+0xBEC0, // ASCII =  30  1011111011
+0xDFC0, // ASCII =  31  1101111111
+0x8000, // ASCII = ' '  1
+0xFF80, // ASCII = '!'  111111111
+0xAF80, // ASCII = '"'  101011111
+0xFA80, // ASCII = '#'  111110101
+0xED80, // ASCII = '$'  111011011
+0xB540, // ASCII = '%'  1011010101
+0xAEC0, // ASCII = '&'  1010111011
+0xBF80, // ASCII = '''  101111111
+0xFB00, // ASCII = '('  11111011
+0xF700, // ASCII = ')'  11110111
+0xB780, // ASCII = '*'  101101111
+0xEF80, // ASCII = '+'  111011111
+0xEA00, // ASCII = ','  1110101
+0xD400, // ASCII = '-'  110101
+0xAE00, // ASCII = '.'  1010111
+0xD780, // ASCII = '/'  110101111
+0xB700, // ASCII = '0'  10110111
+0xBD00, // ASCII = '1'  10111101
+0xED00, // ASCII = '2'  11101101
+0xFF00, // ASCII = '3'  11111111
+0xBB80, // ASCII = '4'  101110111
+0xAD80, // ASCII = '5'  101011011
+0xB580, // ASCII = '6'  101101011
+0xD680, // ASCII = '7'  110101101
+0xD580, // ASCII = '8'  110101011
+0xDB80, // ASCII = '9'  110110111
+0xF500, // ASCII = ':'  11110101
+0xDE80, // ASCII = ';'  110111101
+0xF680, // ASCII = '<'  111101101
+0xAA00, // ASCII = '='  1010101
+0xEB80, // ASCII = '>'  111010111
+0xABC0, // ASCII = '?'  1010101111
+0xAF40, // ASCII = '@'  1010111101
+0xFA00, // ASCII = 'A'  1111101
+0xEB00, // ASCII = 'B'  11101011
+0xAD00, // ASCII = 'C'  10101101
+0xB500, // ASCII = 'D'  10110101
+0xEE00, // ASCII = 'E'  1110111
+0xDB00, // ASCII = 'F'  11011011
+0xFD00, // ASCII = 'G'  11111101
+0xAA80, // ASCII = 'H'  101010101
+0xFE00, // ASCII = 'I'  1111111
+0xFE80, // ASCII = 'J'  111111101
+0xBE80, // ASCII = 'K'  101111101
+0xD700, // ASCII = 'L'  11010111
+0xBB00, // ASCII = 'M'  10111011
+0xDD00, // ASCII = 'N'  11011101
+0xAB00, // ASCII = 'O'  10101011
+0xD500, // ASCII = 'P'  11010101
+0xEE80, // ASCII = 'Q'  111011101
+0xAF00, // ASCII = 'R'  10101111
+0xDE00, // ASCII = 'S'  1101111
+0xDA00, // ASCII = 'T'  1101101
+0xAB80, // ASCII = 'U'  101010111
+0xDA80, // ASCII = 'V'  110110101
+0xAE80, // ASCII = 'W'  101011101
+0xBA80, // ASCII = 'X'  101110101
+0xBD80, // ASCII = 'Y'  101111011
+0xAB40, // ASCII = 'Z'  1010101101
+0xFB80, // ASCII = '['  1111101110
+0xF780, // ASCII = '\'  111101111
+0xFD80, // ASCII = ']'  111111011
+0xAFC0, // ASCII = '^'  1010111111
+0xB680, // ASCII = '_'  101101101
+0xB7C0, // ASCII = '`'  1011011111
+0xB000, // ASCII = 'a'  1011
+0xBE00, // ASCII = 'b'  1011111
+0xBC00, // ASCII = 'c'  101111
+0xB400, // ASCII = 'd'  101101
+0xC000, // ASCII = 'e'  11
+0xF400, // ASCII = 'f'  111101
+0xB600, // ASCII = 'g'  1011011
+0xAC00, // ASCII = 'h'  101011
+0xD000, // ASCII = 'i'  1101
+0xF580, // ASCII = 'j'  111101011
+0xBF00, // ASCII = 'k'  10111111
+0xD800, // ASCII = 'l'  11011
+0xEC00, // ASCII = 'm'  111011
+0xF000, // ASCII = 'n'  1111
+0xE000, // ASCII = 'o'  111
+0xFC00, // ASCII = 'p'  111111
+0xDF80, // ASCII = 'q'  110111111
+0xA800, // ASCII = 'r'  10101
+0xB800, // ASCII = 's'  10111
+0xA000, // ASCII = 't'  101
+0xDC00, // ASCII = 'u'  110111
+0xF600, // ASCII = 'v'  1111011
+0xD600, // ASCII = 'w'  1101011
+0xDF00, // ASCII = 'x'  11011111
+0xBA00, // ASCII = 'y'  1011101
+0xEA80, // ASCII = 'z'  111010101
+0xADC0, // ASCII = '{'  1010110111
+0xDD80, // ASCII = '|'  110111011
+0xAD40, // ASCII = '}'  1010110101
+0xB5C0, // ASCII = '~'  1011010111
+0xED40  // ASCII = 127  1110110101
+};

examples/Parrot/Parrot.ino

@@ -6,13 +6,16 @@ A bit robotic and weird
 
 */
 
-#include <HAMShield.h>
+#include <HamShield.h>
-#include <Wire.h>
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
 
 #define RATE 500
 #define SIZE 1500
 
-HAMShield radio;
+HamShield radio;
 
 char sound[SIZE];
 unsigned int sample1;
@@ -21,7 +24,17 @@ int16_t rssi;
 byte mode = 8;
 
 void setup() { 
-  Wire.begin();
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
   // int result = radio.testConnection();
   radio.initialize();
   radio.setFrequency(446000);

examples/QPSK63Transmit/QPSK63Transmit.ino

@@ -0,0 +1,111 @@
+#include <HamShield.h>
+#include "varicode.h"
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+DDS dds;
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, LOW);
+  
+  
+  Serial.begin(9600);
+  // put your setup code here, to run once:
+  dds.setReferenceClock(32000);
+  dds.start();
+  dds.setFrequency(1000);
+  dds.on();
+}
+
+volatile bool sent = true;
+volatile uint16_t bitsToSend = 0;
+volatile uint8_t zeroCount = 0;
+
+void sendChar(uint8_t c) {
+  uint16_t bits = varicode[c];
+  while((bits&0x8000)==0) {
+    bits<<=1;
+  }
+  while(!sent) {} //delay(32);
+  cli();
+  sent = false;
+  bitsToSend = bits;
+  sei();
+  while(!sent) {} //delay(32);
+  //PORTD &= ~_BV(2); // Diagnostic pin (D2)
+}
+
+char *string = "Why hello there, friend. Nice to meet you. Welcome to PSK31. 73, VE6SLP sk\r\n";
+void loop() {
+  int i;
+  // put your main code here, to run repeatedly:
+  //for(i = 0; i<5; i++)
+  //  sendChar(0);
+  //  return;
+  for(i = 0; i < strlen(string); i++) {
+    sendChar(string[i]);
+    //Serial.println(string[i]);
+  }
+}
+
+const uint8_t amplitudeShape[41] = {
+  255, 241, 228, 215, 203, 191, 181, 171, 161, 152, 143, 135, 128, 121, 114, 107, 101, 96, 90, 85, 80, 76, 72, 68, 64, 60, 57, 54, 51, 48, 45, 42, 40, 38, 36, 34, 32, 30, 28, 27, 25
+};
+
+// This will trigger at 8kHz
+const uint16_t qpskConvolution[32] = {
+  180, 90, -90, 0, -90, 0, 180, 90,
+  0, -90, 90, 180, 90, 180, 0, -90,
+  90, 180, 0, -90, 0, -90, 90, 180,
+  -90, 0, 180, 90, 180, 90, -90, 0
+};
+uint8_t last5Bits = 0b00000;
+ISR(ADC_vect) {
+  static uint8_t outer = 0;
+  static uint8_t tcnt = 0;
+  TIFR1 |= _BV(ICF1);
+  // Wave shaping
+  // TODO: Improve how this would perform.
+  if(tcnt < 81)
+    dds.setAmplitude(amplitudeShape[(81-tcnt)/2]);
+  if(tcnt > (255-81))
+    dds.setAmplitude(amplitudeShape[(tcnt-174)/2]);
+  dds.clockTick();
+
+  if(outer++ == 1) {
+    outer = 0;
+  } else {
+    return;
+  }
+  
+  if(tcnt++ == 0) { // Next bit
+    last5Bits <<= 1;
+    if(!sent) {
+      if((bitsToSend & 0x8000) == 0) {
+        zeroCount++;
+      } else {
+        zeroCount = 0;
+        last5Bits |= 1;
+      }
+      dds.changePhaseDeg(qpskConvolution[last5Bits&31]);
+      bitsToSend<<=1;
+      if(zeroCount == 2) {
+        sent = true;
+      }
+    } else {
+      // Idle on zeroes
+      dds.changePhaseDeg(qpskConvolution[last5Bits&31]);
+    }
+  }
+}

examples/QPSK63Transmit/varicode.h

@@ -0,0 +1,130 @@
+const uint16_t varicode[] = {
+0xAAC0, // ASCII =   0  1010101011
+0xB6C0, // ASCII =   1  1011011011
+0xBB40, // ASCII =   2  1011101101
+0xDDC0, // ASCII =   3  1101110111
+0xBAC0, // ASCII =   4  1011101011
+0xD7C0, // ASCII =   5  1101011111
+0xBBC0, // ASCII =   6  1011101111
+0xBF40, // ASCII =   7  1011111101
+0xBFC0, // ASCII =   8  1011111111
+0xEF00, // ASCII =   9  11101111
+0xE800, // ASCII =  10  11101
+0xDBC0, // ASCII =  11  1101101111
+0xB740, // ASCII =  12  1011011101
+0xF800, // ASCII =  13  11111
+0xDD40, // ASCII =  14  1101110101
+0xEAC0, // ASCII =  15  1110101011
+0xBDC0, // ASCII =  16  1011110111
+0xBD40, // ASCII =  17  1011110101
+0xEB40, // ASCII =  18  1110101101
+0xEBC0, // ASCII =  19  1110101111
+0xD6C0, // ASCII =  20  1101011011
+0xDAC0, // ASCII =  21  1101101011
+0xDB40, // ASCII =  22  1101101101
+0xD5C0, // ASCII =  23  1101010111
+0xDEC0, // ASCII =  24  1101111011
+0xDF40, // ASCII =  25  1101111101
+0xEDC0, // ASCII =  26  1110110111
+0xD540, // ASCII =  27  1101010101
+0xD740, // ASCII =  28  1101011101
+0xEEC0, // ASCII =  29  1110111011
+0xBEC0, // ASCII =  30  1011111011
+0xDFC0, // ASCII =  31  1101111111
+0x8000, // ASCII = ' '  1
+0xFF80, // ASCII = '!'  111111111
+0xAF80, // ASCII = '"'  101011111
+0xFA80, // ASCII = '#'  111110101
+0xED80, // ASCII = '$'  111011011
+0xB540, // ASCII = '%'  1011010101
+0xAEC0, // ASCII = '&'  1010111011
+0xBF80, // ASCII = '''  101111111
+0xFB00, // ASCII = '('  11111011
+0xF700, // ASCII = ')'  11110111
+0xB780, // ASCII = '*'  101101111
+0xEF80, // ASCII = '+'  111011111
+0xEA00, // ASCII = ','  1110101
+0xD400, // ASCII = '-'  110101
+0xAE00, // ASCII = '.'  1010111
+0xD780, // ASCII = '/'  110101111
+0xB700, // ASCII = '0'  10110111
+0xBD00, // ASCII = '1'  10111101
+0xED00, // ASCII = '2'  11101101
+0xFF00, // ASCII = '3'  11111111
+0xBB80, // ASCII = '4'  101110111
+0xAD80, // ASCII = '5'  101011011
+0xB580, // ASCII = '6'  101101011
+0xD680, // ASCII = '7'  110101101
+0xD580, // ASCII = '8'  110101011
+0xDB80, // ASCII = '9'  110110111
+0xF500, // ASCII = ':'  11110101
+0xDE80, // ASCII = ';'  110111101
+0xF680, // ASCII = '<'  111101101
+0xAA00, // ASCII = '='  1010101
+0xEB80, // ASCII = '>'  111010111
+0xABC0, // ASCII = '?'  1010101111
+0xAF40, // ASCII = '@'  1010111101
+0xFA00, // ASCII = 'A'  1111101
+0xEB00, // ASCII = 'B'  11101011
+0xAD00, // ASCII = 'C'  10101101
+0xB500, // ASCII = 'D'  10110101
+0xEE00, // ASCII = 'E'  1110111
+0xDB00, // ASCII = 'F'  11011011
+0xFD00, // ASCII = 'G'  11111101
+0xAA80, // ASCII = 'H'  101010101
+0xFE00, // ASCII = 'I'  1111111
+0xFE80, // ASCII = 'J'  111111101
+0xBE80, // ASCII = 'K'  101111101
+0xD700, // ASCII = 'L'  11010111
+0xBB00, // ASCII = 'M'  10111011
+0xDD00, // ASCII = 'N'  11011101
+0xAB00, // ASCII = 'O'  10101011
+0xD500, // ASCII = 'P'  11010101
+0xEE80, // ASCII = 'Q'  111011101
+0xAF00, // ASCII = 'R'  10101111
+0xDE00, // ASCII = 'S'  1101111
+0xDA00, // ASCII = 'T'  1101101
+0xAB80, // ASCII = 'U'  101010111
+0xDA80, // ASCII = 'V'  110110101
+0xAE80, // ASCII = 'W'  101011101
+0xBA80, // ASCII = 'X'  101110101
+0xBD80, // ASCII = 'Y'  101111011
+0xAB40, // ASCII = 'Z'  1010101101
+0xFB80, // ASCII = '['  1111101110
+0xF780, // ASCII = '\'  111101111
+0xFD80, // ASCII = ']'  111111011
+0xAFC0, // ASCII = '^'  1010111111
+0xB680, // ASCII = '_'  101101101
+0xB7C0, // ASCII = '`'  1011011111
+0xB000, // ASCII = 'a'  1011
+0xBE00, // ASCII = 'b'  1011111
+0xBC00, // ASCII = 'c'  101111
+0xB400, // ASCII = 'd'  101101
+0xC000, // ASCII = 'e'  11
+0xF400, // ASCII = 'f'  111101
+0xB600, // ASCII = 'g'  1011011
+0xAC00, // ASCII = 'h'  101011
+0xD000, // ASCII = 'i'  1101
+0xF580, // ASCII = 'j'  111101011
+0xBF00, // ASCII = 'k'  10111111
+0xD800, // ASCII = 'l'  11011
+0xEC00, // ASCII = 'm'  111011
+0xF000, // ASCII = 'n'  1111
+0xE000, // ASCII = 'o'  111
+0xFC00, // ASCII = 'p'  111111
+0xDF80, // ASCII = 'q'  110111111
+0xA800, // ASCII = 'r'  10101
+0xB800, // ASCII = 's'  10111
+0xA000, // ASCII = 't'  101
+0xDC00, // ASCII = 'u'  110111
+0xF600, // ASCII = 'v'  1111011
+0xD600, // ASCII = 'w'  1101011
+0xDF00, // ASCII = 'x'  11011111
+0xBA00, // ASCII = 'y'  1011101
+0xEA80, // ASCII = 'z'  111010101
+0xADC0, // ASCII = '{'  1010110111
+0xDD80, // ASCII = '|'  110111011
+0xAD40, // ASCII = '}'  1010110101
+0xB5C0, // ASCII = '~'  1011010111
+0xED40  // ASCII = 127  1110110101
+};

examples/SSTV/SSTV.ino

@@ -4,27 +4,40 @@ Sends an SSTV test pattern
 
 */
 
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
 #define DOT 100
 #define CALLSIGN "1ZZ9ZZ/B"
 
 /* Standard libraries and variable init */
 
-#include <HAMShield.h>
+#include <HamShield.h>
-#include <Wire.h>
 
-HAMShield radio;
+HamShield radio;
 int16_t rssi;
 
 /* get our radio ready */
 
 void setup() {
-  Wire.begin();
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
   Serial.begin(9600);
   Serial.print("Radio status: ");
   int result = radio.testConnection();
   Serial.println(result);
   radio.initialize();
-  radio.setFrequency(446000);
+  radio.frequency(446000);
   radio.setModeReceive();
 }
 

examples/SSTV_M1_Static/SSTV_M1_Static.ino

@@ -0,0 +1,440 @@
+// So the precalculated values will get stored
+#define DDS_REFCLK_DEFAULT (34965/2)
+
+#include <HamShield.h>
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
+DDS dds;
+// Defined at the end of the sketch
+extern const uint16_t image[256*20] PROGMEM;
+
+#define F_1200 0
+#define F_1500 1
+#define F_2400 2
+ddsAccumulator_t freqTable[3];
+
+void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
+  Serial.begin(9600);
+
+  // Query the HamShield for status information
+  Serial.print("Radio status: ");
+  int result = 0;
+  result = radio.testConnection();
+  Serial.println(result,DEC);
+  
+  // Tell the HamShield to start up
+  radio.initialize();
+  radio.setRfPower(0);
+  radio.frequency(145500);
+  // put your setup code here, to run once:
+  //dds.setReferenceClock(34965/4);
+  dds.start();
+  freqTable[F_1200] = dds.calcFrequency(1200);
+  freqTable[F_1500] = dds.calcFrequency(1500);
+  freqTable[F_2400] = dds.calcFrequency(2400);
+  dds.setFrequency(1000);
+  dds.on();
+  Serial.println("DDS on");
+  delay(1000);
+  dds.off();
+  delay(2000);
+  Serial.println("Next");
+}
+
+uint8_t code = MARTIN1;
+bool parityCalc(int code) {  
+     unsigned int v;       // word value to compute the parity of
+     bool parity = false;  // parity will be the parity of v
+
+    while (code)
+    {
+       parity = !parity;
+       code = code & (code - 1);
+    }
+
+    return parity;
+}
+
+volatile bool registered = false;
+volatile bool scanning = false;
+volatile bool done = false;
+volatile uint16_t nextBlock = 0;
+volatile uint8_t currentScanline = 0;
+volatile uint16_t scanline[2][20];
+
+// Format is 3 'images', one each for green, blue and red
+// But we don't have room, so it's monochrome
+// 256 rows each
+// 10 sets of 32 bits encoding on/off for the colour
+//const unsigned long image[256][10] PROGMEM = {
+ 
+//};
+
+void loadScanline(uint8_t s, int y) {
+  for(int i = 0; i < 20; i++) {
+    scanline[s][i] = pgm_read_word_near(image + y*20 + i);
+  }
+}
+#define DON()  PORTD |= _BV(2);
+#define DOFF() PORTD &= ~_BV(2);
+void loop() {
+  // Load the first scanline
+  loadScanline(0, 0);
+  radio.setModeTransmit();
+  delay(500);
+  // VIS
+  dds.playWait(1900,300);
+  dds.playWait(1200,10);
+  dds.playWait(1900,300);
+  dds.playWait(1200,30);
+  for(int x = 0; x < 7; x++) { 
+     if(bitRead(code,x)) { dds.playWait(1100,30); } else { dds.playWait(1300,30); } 
+  } 
+  if(parityCalc(code)) { dds.playWait(1300,30); } else { dds.playWait(1100,30); } 
+  dds.playWait(1200,30);
+  dds.on();
+  for(int y = 1; y < 256; y++){
+    DON();
+    dds.setPrecalcFrequency(freqTable[F_1200]);
+    // Subtract for the timer ticks
+    delayMicroseconds(3562);              // sync pulse (4862 uS)
+    DOFF();
+    DON();
+    dds.setPrecalcFrequency(freqTable[F_1500]);
+    // Subtract for the timer ticks
+    delayMicroseconds(442);               // sync porch (572 uS)
+    DOFF();
+    scanning = true;
+    for(uint8_t c = 0; c<3; c++) {
+      scanning = true;
+      while(!registered);
+      registered = false;
+      loadScanline((++currentScanline) & 1, y);
+      while(!done);
+      dds.setPrecalcFrequency(freqTable[F_1500]);
+      done = false;
+      scanning = false;
+      DON();
+      delayMicroseconds(442);               // color separator pulse (572 uS)
+      DOFF();
+    }
+  }
+  dds.off();
+  radio.setModeReceive();
+  delay(10000);
+  return;
+}
+
+// The DDS is running faster than the pixel clock, so we
+// only update the pixel frequency every few ticks.
+ISR(ADC_vect) {
+  static uint8_t tcnt = 0;
+  static uint8_t shifts = 0;
+  static uint8_t shiftingLine = 0;
+  static uint8_t linePos = 0;
+  static uint16_t pixelBlock;
+  TIFR1 |= _BV(ICF1);
+  dds.clockTick();
+  if(scanning) {
+    if(++tcnt == 8) {
+      tcnt = 0;
+      if(linePos == 21) {
+        done = true;
+        linePos = 0;
+      }
+      if(linePos == 0) {
+        shifts = 0;
+        shiftingLine = currentScanline&1;
+        registered = true;
+      }
+      if(shifts == 0) {
+        pixelBlock = scanline[shiftingLine][linePos++];
+      }
+      
+      if(pixelBlock & 0x8000) {
+        dds.setPrecalcFrequency(freqTable[F_2400]);
+      } else {
+        dds.setPrecalcFrequency(freqTable[F_1500]);
+      }
+      if(++shifts == 16) {
+        shifts = 0;
+      }
+      pixelBlock <<= 1;
+    }
+  }
+}
+
+// Image is 256 lines * 320 pixels per line, packed to 16 bits at a time
+const uint16_t image[256*20] PROGMEM = {
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 1
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 2
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 3
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 4
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 5
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 6
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 7
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 8
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 9
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 10
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 11
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 12
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 13
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 14
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 15
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 16
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 17
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 18
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 19
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 20
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 21
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 22
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 23
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 24
+0xFFFF, 0xE0FF, 0x07FF, 0xBFCF, 0xFFFF, 0xFFC1, 0xF3FE, 0x7FF9, 0xFF3F, 0xFC1F, 0xE0FF, 0xF7F9, 0xFFFF, 0xFFF8, 0x3E7F, 0xCFFF, 0x3FE7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 25
+0xFFFF, 0x807C, 0x03FF, 0x3FCF, 0xFFFF, 0xFF80, 0x73FE, 0x7FF9, 0xFF3F, 0xF00F, 0x807F, 0xE7F9, 0xFFFF, 0xFFF0, 0x0E7F, 0xCFFF, 0x3FE7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 26
+0xFFFF, 0x1F38, 0xF9FF, 0x3FCF, 0xFFFF, 0xFF1E, 0x33FF, 0xFFF9, 0xFF3F, 0xE3E7, 0x1F3F, 0xE7F9, 0xFFFF, 0xFFE3, 0xC67F, 0xFFFF, 0x3FE7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 27
+0xFFFF, 0x3F19, 0xFCFF, 0x3FCF, 0xFFFF, 0xFF3F, 0x33FF, 0xFFF9, 0xFF3F, 0xE7E3, 0x3F9F, 0xE7F9, 0xFFFF, 0xFFE7, 0xE67F, 0xFFFF, 0x3FE7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 28
+0xFFFE, 0x7FF3, 0xFCFF, 0x3FCF, 0x0723, 0x8F3F, 0xF21E, 0x7879, 0xE13F, 0xCFFE, 0x7F9F, 0xE7F9, 0xE0E4, 0x71E7, 0xFE43, 0xCF0F, 0x3C27, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 29
+0xFFFE, 0x7FF3, 0xFCFF, 0x3FCE, 0x0300, 0x071F, 0xF00E, 0x7019, 0xC03F, 0xCFFE, 0x7F9F, 0xE7F9, 0xC060, 0x00E3, 0xFE01, 0xCE03, 0x3807, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 30
+0xFFFE, 0x7FF3, 0xFE7F, 0x000C, 0xF31C, 0x7381, 0xF1E6, 0x6799, 0x9E3F, 0xCFFE, 0x7FCF, 0xE001, 0x9E63, 0x8E70, 0x3E3C, 0xCCF3, 0x33C7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 31
+0xFFFE, 0x7FF3, 0xFC7F, 0x000F, 0x833C, 0xF3F0, 0x73E6, 0x67C9, 0x9F3F, 0xCFFE, 0x7F8F, 0xE001, 0xF067, 0x9E7E, 0x0E7C, 0xCCF9, 0x33E7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 32
+0xFFFE, 0x7FF3, 0xFCFF, 0x3FCE, 0x033C, 0xF3FF, 0x33E6, 0x6009, 0x9F3F, 0xCFFE, 0x7F9F, 0xE7F9, 0xC067, 0x9E7F, 0xE67C, 0xCC01, 0x33E7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 33
+0xFFFE, 0x7FB3, 0xFCFF, 0x3FCC, 0xF33C, 0xF3FF, 0x33E6, 0x67F9, 0x9F3F, 0xCFF6, 0x7F9F, 0xE7F9, 0x9E67, 0x9E7F, 0xE67C, 0xCCFF, 0x33E7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 34
+0xFFFF, 0x3F19, 0xE0FF, 0x3FCC, 0xF33C, 0xF33F, 0x33E6, 0x67F9, 0x9F3F, 0xE7E3, 0x3C1F, 0xE7F9, 0x9E67, 0x9E67, 0xE67C, 0xCCFF, 0x33E7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 35
+0xFFFF, 0x1F38, 0xF1FF, 0x3FCC, 0xE33C, 0xF31F, 0x33E6, 0x6789, 0x9E3F, 0xE3E7, 0x1E3F, 0xE7F9, 0x9C67, 0x9E63, 0xE67C, 0xCCF1, 0x33C7, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 36
+0xFFFF, 0x807C, 0x01FF, 0x3FCC, 0x033C, 0xF380, 0x73E6, 0x7019, 0xC03F, 0xF00F, 0x803F, 0xE7F9, 0x8067, 0x9E70, 0x0E7C, 0xCE03, 0x3807, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 37
+0xFFFF, 0xE0FF, 0x04FF, 0xBFCE, 0x1B3C, 0xF3C0, 0xF3E6, 0x7839, 0xE13F, 0xFC1F, 0xE09F, 0xF7F9, 0xC367, 0x9E78, 0x1E7C, 0xCF07, 0x3C27, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 38
+0xFFFF, 0xFFFF, 0xFEFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFDF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 39
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 40
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 41
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 42
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 43
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 44
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 45
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 46
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 47
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 48
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 49
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 50
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 51
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 52
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 53
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 54
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 55
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0x1FFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 56
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFE0, 0x007F, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 57
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFF80, 0x001F, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 58
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFE00, 0x0007, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 59
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFC3, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFC00, 0x0003, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 60
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xF800, 0x3FFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xF800, 0x0001, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 61
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xC000, 0x0FFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xF800, 0x0000, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 62
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0x8000, 0x03FF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xF000, 0x0000, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 63
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0x0000, 0x01FF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xE000, 0x0000, 0x7FFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 64
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFE, 0x0000, 0x00FF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xE000, 0x0000, 0x7FFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 65
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFC, 0x0000, 0x007F, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xC000, 0x0000, 0x7FFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 66
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFC, 0x0000, 0x003F, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xC000, 0x0000, 0x7FFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 67
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+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 247
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 248
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 249
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 250
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 251
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 252
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 253
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 254
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 255
+0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,  // Line 256
+};

examples/SerialTransceiver/SerialTransceiver.ino

@@ -1,6 +1,6 @@
 /*
 
-SerialTransceiver is TTL Serial port "glue" to allow desktop or laptop control of the HAMShield
+SerialTransceiver is TTL Serial port "glue" to allow desktop or laptop control of the HamShield
 
 Commands:
 
@@ -17,6 +17,7 @@ Frequency      F<freq>;    Set the receive frequency in KHz, if offset is disabl
 CDCSS In       G<code>;    <code> must be a valid CDCSS code                                                                                                            No
 CDCSS Out      H<code>;    <code> must be a valid CDCSS code                                                                                                            No
 Print tones    I           Prints out all configured tones and codes, coma delimited in format: CTCSS In, CTCSS Out, CDCSS In, CDCSS Out                                No
+Morse Out      M<text>;    A small buffer for morse code (32 chars)
 Power level    P<level>;   Set the power amp level, 0 = lowest, 15 = highest                                                                                           No
 Enable Offset  R<state>;   1 turns on repeater offset mode, 0 turns off repeater offset mode                                                                            No
 Squelch        S<level>;   Set the squelch level                                                                                                                        No
@@ -45,8 +46,11 @@ Debug Msg    @<text>;   32 character debug message
 
 */
 
-#include "Wire.h"
+#include "HamShield.h"
-#include "HAMShield.h"
+
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
 
 int state;
 int txcount = 0;
@@ -62,14 +66,25 @@ int cdcssin = 0;
 int cdcssout = 0;
 
 
-HAMShield radio;
+HamShield radio;
 
 
 
 void setup() {
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
   Serial.begin(115200);
   Serial.print(";;;;;;;;;;;;;;;;;;;;;;;;;;");
-  Wire.begin();
+
   int result = radio.testConnection();
   Serial.print("*");
   Serial.print(result,DEC);
@@ -81,7 +96,7 @@ void setup() {
   radio.setVolume2(0xF);
   radio.setModeReceive();
   radio.setTxSourceMic();
-  radio.setRfPower(9);
+  radio.setRfPower(0);
   radio.setSQLoThresh(80);
   radio.setSQOn();
 }
@@ -103,8 +118,7 @@ void loop() {
            
            case 32:  // space - transmit
                if(repeater == 1) { radio.frequency(tx); } 
-               radio.setRX(0);
+               radio.setModeTransmit();
-               radio.setTX(1);
                state = 10;
                Serial.print("#TX,ON;");
                timer = millis();
@@ -137,6 +151,14 @@ void loop() {
                if(radio.frequency(freq) == true) { Serial.print("@"); Serial.print(freq,DEC); Serial.print(";!;"); } else { Serial.print("X1;"); } 
                break;
 
+           case 'M':
+               getValue();
+               radio.setModeTransmit();
+               delay(300);
+               radio.morseOut(cmdbuff);
+               state = 10;
+               break; 
+               
            case 80: // P - power level
                getValue();
                temp = atol(cmdbuff);
@@ -172,7 +194,7 @@ void loop() {
 
   }
       if(state == 10) { 
-    if(millis() > (timer + 500)) { Serial.print("#TX,OFF;");radio.setRX(1); radio.setTX(0); if(repeater == 1) { radio.frequency(freq); }  state = 0; txcount = 0; }
+    if(millis() > (timer + 500)) { Serial.print("#TX,OFF;");radio.setModeReceive(); if(repeater == 1) { radio.frequency(freq); }  state = 0; txcount = 0; }
     }
 }
 

examples/SignalTest/SignalTest.ino

@@ -10,11 +10,14 @@ Plays back the current signal strength level and morses out it's call sign at th
 
 /* Standard libraries and variable init */
 
-#include <HAMShield.h>
+#include <HamShield.h>
-#include <Wire.h>
 #include <PCM.h>
 
-HAMShield radio;
+#define PWM_PIN 3
+#define RESET_PIN A3
+#define SWITCH_PIN 2
+
+HamShield radio;
 int16_t rssi;
 int peak = -150;
 char sig[8];
@@ -74,13 +77,23 @@ const unsigned char dbm[] PROGMEM = {
 /* get our radio ready */
 
 void setup() {
-  Wire.begin();
+  // NOTE: if not using PWM out, it should be held low to avoid tx noise
+  pinMode(PWM_PIN, OUTPUT);
+  digitalWrite(PWM_PIN, LOW);
+  
+  // prep the switch
+  pinMode(SWITCH_PIN, INPUT_PULLUP);
+  
+  // set up the reset control pin
+  pinMode(RESET_PIN, OUTPUT);
+  digitalWrite(RESET_PIN, HIGH);
+  
   Serial.begin(9600);
   Serial.print("Radio status: ");
   int result = radio.testConnection();
   Serial.println(result);
   radio.initialize();
-  radio.setFrequency(446000);
+  radio.frequency(446000);
   radio.setVolume1(0xF);
   radio.setVolume2(0xF);
   radio.setModeReceive();
@@ -104,7 +117,7 @@ void loop() {
      
    if(rssi < -120) { 
      Serial.println("Transmit On");
-     radio.setTX(1);
+     radio.setModeTransmit();
      delay(250);
      tone(11,1000,500); 
      delay(1000);
@@ -131,9 +144,8 @@ void loop() {
      delay(1000);
      Serial.println("done!");
      radio.morseOut(CALLSIGN);
-     radio.setTX(0);
-     Serial.println("Transmit off");
      radio.setModeReceive();
+     Serial.println("Transmit off");
      delay(1000);
    }
 }