Rename for library compatability.
This commit is contained in:
Stephen Olesen
259
examples/CrystalCalibration/CrystalCalibration.ino
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259
examples/CrystalCalibration/CrystalCalibration.ino
Normal file
@@ -0,0 +1,259 @@
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#define DDS_REFCLK_DEFAULT 38400
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#define DDS_REFCLK_OFFSET 0
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#define DDS_DEBUG_SERIAL
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#include <HamShield.h>
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#include <Wire.h>
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HamShield radio;
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DDS dds;
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void setup() {
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Serial.begin(9600);
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Wire.begin();
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radio.initialize();
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radio.setVHF();
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radio.setRfPower(0);
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radio.setFrequency(145050);
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pinMode(2, OUTPUT);
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pinMode(3, OUTPUT);
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pinMode(11, INPUT);
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dds.start();
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dds.setFrequency(1200);
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dds.on();
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radio.bypassPreDeEmph();
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}
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enum Sets {
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SET_REF,
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SET_TONE,
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SET_AMPLITUDE,
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SET_ADC_HALF,
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SET_OFFSET
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} setting = SET_TONE;
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char freqBuffer[8];
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char *freqBufferPtr = freqBuffer;
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uint16_t lastFreq = 1200;
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volatile uint16_t recordedPulseLength;
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volatile bool recordedPulse = false;
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volatile bool listening = false;
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volatile uint8_t maxADC = 0, minADC = 255, adcHalf = 40;
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void loop() {
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static uint16_t samples = 0;
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static uint16_t pulse;
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static uint32_t lastOutput = 0;
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static float pulseFloat = 0.0;
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if(recordedPulse) {
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uint32_t pulseAveraging;
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uint16_t tmpPulse;
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cli();
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recordedPulse = false;
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tmpPulse = recordedPulseLength;
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sei();
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if(samples++ == 0) {
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pulse = tmpPulse;
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//pulseFloat = tmpPulse;
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} else {
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pulseAveraging = (pulse + tmpPulse) >> 1;
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pulse = pulseAveraging;
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pulseFloat = pulseFloat + 0.01*((float)pulse-pulseFloat);
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}
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if((lastOutput + 1000) < millis()) {
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Serial.print(F("Pulse: "));
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Serial.println(pulse);
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Serial.print(F("Last: "));
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Serial.println(tmpPulse);
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Serial.print(F("Samples: "));
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Serial.println(samples);
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Serial.print(F("ADC M/M: "));
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Serial.print(minADC); minADC = 255;
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Serial.print(F(" / "));
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Serial.println(maxADC); maxADC = 0;
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Serial.print(F("Freq: "));
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// F = 1/(pulse*(1/ref))
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// F = ref/pulse
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Serial.print((float)((float)dds.getReferenceClock()+(float)dds.getReferenceOffset())/(float)pulse);
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Serial.print(F(" / "));
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Serial.print((float)((float)dds.getReferenceClock()+(float)dds.getReferenceOffset())/pulseFloat);
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Serial.print(F(" / "));
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Serial.println(pulseFloat);
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Serial.print(F("Freq2: "));
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// F = 1/(pulse*(1/ref))
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// F = ref/pulse
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Serial.print((float)dds.getReferenceClock()/(float)pulse);
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Serial.print(F(" / "));
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Serial.println((float)dds.getReferenceClock()/pulseFloat);
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samples = 0;
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lastOutput = millis();
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}
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}
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while(Serial.available()) {
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char c = Serial.read();
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Serial.print(c);
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switch(c) {
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case 'h':
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Serial.println(F("Commands:"));
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Serial.println(F("RefClk: u = +10, U = +100, r XXXX = XXXX"));
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Serial.println(F(" d = -10, D = -100"));
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Serial.println(F("Offset: s XXX = Set refclk offset"));
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Serial.println(F("Radio: T = transmit, R = receive"));
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Serial.println(F("Tone: t XXXX = XXXX Hz"));
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Serial.println(F("Amp.: a XXX = XXX out of 255"));
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Serial.println(F("DDS: o = On, O = Off"));
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Serial.println(F("Input: l = Determine received frequency, L = stop"));
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Serial.println(F("ADC: m XXX = Set ADC midpoint (zero crossing level)"));
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Serial.println(F("ie. a 31 = 32/255 amplitude, r38400 sets 38400Hz refclk"));
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Serial.println("> ");
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break;
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case 'u':
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dds.setReferenceClock(dds.getReferenceClock()+10);
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dds.setFrequency(lastFreq);
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dds.start();
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Serial.println(F("RefClk + 10 = "));
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Serial.println(dds.getReferenceClock());
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Serial.println("> ");
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break;
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case 'U':
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dds.setReferenceClock(dds.getReferenceClock()+100);
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dds.setFrequency(lastFreq);
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dds.start();
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Serial.println(F("RefClk + 100 = "));
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Serial.println(dds.getReferenceClock());
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Serial.println("> ");
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break;
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case 'd':
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dds.setReferenceClock(dds.getReferenceClock()-10);
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dds.setFrequency(lastFreq);
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dds.start();
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Serial.println(F("RefClk - 10 = "));
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Serial.println(dds.getReferenceClock());
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Serial.println("> ");
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break;
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case 'D':
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dds.setReferenceClock(dds.getReferenceClock()-100);
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dds.setFrequency(lastFreq);
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dds.start();
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Serial.println(F("RefClk - 100 = "));
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Serial.println(dds.getReferenceClock());
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Serial.println("> ");
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break;
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case 'l':
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Serial.println(F("Start frequency listening, DDS off"));
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dds.off();
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listening = true;
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lastOutput = millis();
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Serial.println("> ");
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break;
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case 'L':
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Serial.println(F("Stop frequency listening, DDS on"));
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listening = false;
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samples = 0;
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dds.on();
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Serial.println("> ");
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break;
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case 'T':
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Serial.println(F("Radio transmit"));
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radio.setModeTransmit();
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Serial.println("> ");
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break;
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case 'R':
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Serial.println(F("Radio receive"));
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radio.setModeReceive();
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Serial.println("> ");
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break;
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case 'r':
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setting = SET_REF;
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break;
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case 't':
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setting = SET_TONE;
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break;
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case 'a':
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setting = SET_AMPLITUDE;
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break;
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case 'm':
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setting = SET_ADC_HALF;
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break;
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case 's':
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setting = SET_OFFSET;
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break;
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case 'o':
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dds.on();
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Serial.println("> ");
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break;
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case 'O':
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dds.off();
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Serial.println("> ");
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break;
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default:
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if(c == '-' || (c >= '0' && c <= '9')) {
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*freqBufferPtr = c;
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freqBufferPtr++;
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}
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if((c == '\n' || c == '\r') && freqBufferPtr != freqBuffer) {
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*freqBufferPtr = '\0';
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freqBufferPtr = freqBuffer;
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uint16_t freq = atoi(freqBuffer);
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if(setting == SET_REF) {
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dds.setReferenceClock(freq);
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dds.setFrequency(lastFreq);
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dds.start();
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Serial.print(F("New Reference Clock: "));
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Serial.println(dds.getReferenceClock());
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} else if(setting == SET_TONE) {
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dds.setFrequency(freq);
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lastFreq = freq;
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Serial.print(F("New Tone: "));
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Serial.println(freq);
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} else if(setting == SET_AMPLITUDE) {
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dds.setAmplitude((uint8_t)(freq&0xFF));
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Serial.print(F("New Amplitude: "));
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Serial.println((uint8_t)(freq&0xFF));
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} else if(setting == SET_ADC_HALF) {
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adcHalf = freq&0xFF;
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Serial.print(F("ADC midpoint set to "));
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Serial.println((uint8_t)(freq&0xFF));
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} else if(setting == SET_OFFSET) {
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dds.setReferenceOffset((int16_t)atoi(freqBuffer));
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dds.setFrequency(lastFreq);
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Serial.print(F("Refclk offset: "));
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Serial.println(dds.getReferenceOffset());
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}
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Serial.println("> ");
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}
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break;
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}
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}
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}
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ISR(ADC_vect) {
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static uint16_t pulseLength = 0;
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static uint8_t lastADC = 127;
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cli();
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TIFR1 = _BV(ICF1);
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PORTD |= _BV(2);
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dds.clockTick();
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sei();
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if(listening) {
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pulseLength++;
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if(ADCH >= adcHalf && lastADC < adcHalf) {
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// Zero crossing, upward
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recordedPulseLength = pulseLength;
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recordedPulse = true;
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pulseLength = 0;
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}
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if(minADC > ADCH) {
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minADC = ADCH;
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}
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if(maxADC < ADCH) {
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maxADC = ADCH;
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}
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lastADC = ADCH;
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}
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PORTD &= ~_BV(2);
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}
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