79 lines
1.6 KiB
Arduino
79 lines
1.6 KiB
Arduino
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#include <HamShield.h>
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#include "varicode.h"
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DDS dds;
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void setup() {
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Serial.begin(9600);
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pinMode(11, OUTPUT);
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pinMode(2, OUTPUT);
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// put your setup code here, to run once:
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dds.setReferenceClock(8000);
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dds.start();
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dds.setFrequency(1000);
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dds.on();
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}
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volatile bool sent = true;
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volatile uint16_t bitsToSend = 0;
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volatile uint8_t zeroCount = 0;
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void sendChar(uint8_t c) {
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uint16_t bits = varicode[c];
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while((bits&0x8000)==0) {
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bits<<=1;
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}
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while(!sent) {} //delay(32);
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cli();
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sent = false;
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bitsToSend = bits;
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sei();
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while(!sent) {} //delay(32);
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//PORTD &= ~_BV(2); // Diagnostic pin (D2)
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}
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char *string = "Why hello there, friend. Nice to meet you. Welcome to PSK31. 73, VE6SLP sk\r\n";
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void loop() {
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int i;
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// put your main code here, to run repeatedly:
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//for(i = 0; i<5; i++)
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// sendChar(0);
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// return;
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for(i = 0; i < strlen(string); i++) {
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sendChar(string[i]);
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Serial.println(string[i]);
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}
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}
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// This will trigger at 8kHz
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ISR(ADC_vect) {
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static uint8_t tcnt = 0;
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TIFR1 |= _BV(ICF1);
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// Wave shaping
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PORTD |= _BV(2);
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if(tcnt < 32)
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dds.setAmplitude(tcnt<<3);
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if(tcnt > (255-32))
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dds.setAmplitude((255 - tcnt)<<3);
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dds.clockTick();
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if(tcnt++ == 0) { // Next bit
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//PORTD ^= _BV(2); // Diagnostic pin (D2)
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if(!sent) {
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if((bitsToSend & 0x8000) == 0) {
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zeroCount++;
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dds.changePhaseDeg(+180);
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} else {
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zeroCount = 0;
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}
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bitsToSend<<=1;
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if(zeroCount == 2) {
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sent = true;
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}
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} else {
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// Idle on zeroes
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dds.changePhaseDeg(+180);
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}
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}
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PORTD &= ~_BV(2);
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}
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