Added Crystal Calibration sketch with simple Serial UI. Fixed ddsAccumulator_t type.

2015-07-04 14:13:45 -06:00
parent 7c67a704c3
commit 4af33167a0
4 changed files with 173 additions and 6 deletions
--- a/examples/Crystal-Calibration/Crystal-Calibration.ino
+++ b/examples/Crystal-Calibration/Crystal-Calibration.ino
@@ -0,0 +1,152 @@
+#define DDS_REFCLK_DEFAULT 19200
+#define DDS_REFCLK_OFFSET  0
+#define DDS_DEBUG_SERIAL
+
+#include <HamShield.h>
+#include <Wire.h>
+
+HamShield radio;
+DDS dds;
+
+void setup() {
+  Serial.begin(9600);
+  Wire.begin();
+  radio.initialize();
+  radio.setVHF();
+  radio.setRfPower(0);
+  radio.setFrequency(145050);
+  
+  pinMode(2, OUTPUT);
+  pinMode(3, OUTPUT);
+  pinMode(11, INPUT);
+  
+  dds.start();
+  dds.setFrequency(1200);
+  dds.on();
+  
+  radio.bypassPreDeEmph();
+}
+
+enum Sets {
+  SET_REF,
+  SET_TONE,
+  SET_AMPLITUDE
+} setting = SET_TONE;
+
+char freqBuffer[8];
+char *freqBufferPtr = freqBuffer;
+uint16_t lastFreq = 1200;
+
+void loop() {
+  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("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("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 '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 'o':
+        dds.on();
+        Serial.println("> ");
+        break;
+      case 'O':
+        dds.off();
+        Serial.println("> ");
+        break;
+      default:
+        if(c >= '0' && c <= '9') {
+          *freqBufferPtr = c;
+          freqBufferPtr++;
+        }
+        if(c == '\n' && 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));
+          }
+          Serial.println("> ");
+        }
+        break;
+    }
+  }
+}
+
+ISR(ADC_vect) {
+  TIFR1 = _BV(ICF1);
+  PORTD |= _BV(2);
+  dds.clockTick();
+  PORTD &= ~_BV(2);
+}