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QP-7C_FT8a.ino
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QP-7C_FT8a.ino
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#include "si5351.h"
#include "Wire.h"
#include "LCD_ST7032.h"
LCD_ST7032 lcd;
Si5351 si5351;
long int freq; // frequency (Hz)
long int freqstep = 1000; //initial frequency step (Hz)
int cursol = 5; // =8-log(freqstep)
int mode; //0=CW mode (single key), 2=Digital mode
int TxStatus = 0; //0=RX, 1=TX
int statuschangeflag= 0; //1=staus change
int key;
int freqchangeflag=0;
void setup(void)
{
Serial.begin(115200);
Serial.setTimeout(4);
//si5351 initialization-----
int32_t cal_factor = -21800;
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
si5351.set_correction(cal_factor, SI5351_PLL_INPUT_XO);
si5351.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
si5351.set_freq(freq*100ULL, SI5351_CLK0); //for TX
si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_8MA);
si5351.output_enable(SI5351_CLK0, 0);
//si5351 -----
//ST7032(AQM0802A-RN-GBW) initialization-----
lcd.begin();
lcd.setcontrast(20);
lcd.blink(); //cursol blinking
lcd.setCursor(0,0);
lcd.print("QP-7C ");
//ST7032 -----
//Digital pins -----
pinMode(2, INPUT_PULLUP); //Key
pinMode(7, INPUT); //PD7 = AN1 = HiZ, PD6 = AN0 = 0
pinMode(8, INPUT_PULLUP); //SW1 (freq. step down)
pinMode(9, INPUT_PULLUP); //SW2 (freq. up)
pinMode(10, INPUT_PULLUP); //SW3 (freq. down)
pinMode(12, OUTPUT); //High=RX, LOW=TX (for Drive switch)
pinMode(13, OUTPUT); //High=TX, LOW=RX (for Drive switch (NPN open-collector or N-FET open-drain))
//Digital pins -----
//Timer setting for audio frequency analysis-----
TCCR1A = 0x00;
TCCR1B = 0x01; // Timer1 Timer 16 MHz
TCCR1B = 0x81; // Timer1 Input Capture Noise Canceler
ACSR |= (1<<ACIC); // Analog Comparator Capture Input
//Timer setting -----
//Mode check -----
key=digitalRead(2);
if (key==1) {
mode = 0; //CW mode (single key)
freq=7010000;
lcd.setCursor(0,0);
lcd.print("CW ");
lcd.setCursor(0,7);
lcd.print("R");
lcd_disp(freq, cursol);
si5351.set_freq(freq*100ULL, SI5351_CLK0); //TX freequency
si5351.output_enable(SI5351_CLK0, 0); //TX off
digitalWrite(12,1); //RX on (TX off)
digitalWrite(13,0); //TX switch off
}
else {
mode = 2; //Digital(FSK) mode
freq=7041000; //FT8 (JA local)
lcd.setCursor(0,0);
lcd.print("FSK ");
String freqString = String(freq, DEC);
lcd.setCursor(1,8-freqString.length());
lcd.print(freqString);
}
}
void loop(void)
{
if (mode == 0) cw0();
else digital();
}
void cw0(void)
{
long int freqset=freq;
// change the frequency by remote control
if(Serial.available() > 0) cat();
if (freqset|=freq) {
freq=freq_in_band(freqset, freq); // prevention of out-of-band transmission (JA)
}
// change the frequency step by SW1
if (digitalRead(8)==LOW){
delay(200);
cursol++;
freqstep = freqstep / 10;
if (cursol>8) {
cursol=2;
freqstep = 1000000;
}
lcd_disp(freq, cursol);
}
// increase the frequency by SW2
if (digitalRead(9)==LOW){
delay(200);
freqset = freq + freqstep;
freq=freq_in_band(freq, freqset); // prevention of out-of-band transmission (JA)
si5351.set_freq(freq*100ULL, SI5351_CLK0); //TX
lcd_disp(freq, cursol);
}
// decrease the frequency by SW3
if (digitalRead(10)==LOW){
delay(200);
freqset = freq - freqstep;
freq=freq_in_band(freq, freqset); // prevention of out-of-band transmission (JA)
si5351.set_freq(freq*100ULL, SI5351_CLK0); //TX
lcd_disp(freq, cursol);
}
// Keying
if (digitalRead(2)==LOW) {
if (TxStatus==0) {
si5351.output_enable(SI5351_CLK0, 1); //TX on
digitalWrite(12,0);
digitalWrite(13,1);
lcd.setCursor(0,7);
lcd.print("T");
TxStatus=1;
}
}
else {
if (TxStatus==1) {
si5351.output_enable(SI5351_CLK0, 0); //TX off
digitalWrite(12,1);
digitalWrite(13,0);
lcd.setCursor(0,7);
lcd.print("R");
lcd_disp(freq, cursol);
TxStatus=0;
}
}
}
void digital(void)
{
//https://www.elektronik-labor.de/HF/FT8QRP.html
//partly modified
//(Using 3 cycles for timer sampling to improve the precision of frequency measurements)
//(Against overflow in low frequency measurements)
if(Serial.available() > 0) cat();
if(freqchangeflag==1){
lcd.setCursor(1,0);
lcd.print(" ");
String freqString = String(freq, DEC);
lcd.setCursor(1,8-freqString.length());
lcd.print(freqString);
lcd_disp(freq, cursol);
freqchangeflag=0;
}
int FSK = 1;
int FSKtx = 0;
while (FSK>0){
int Nsignal = 10;
int Ncycle01 = 0;
int Ncycle12 = 0;
int Ncycle23 = 0;
int Ncycle34 = 0;
unsigned int d1=1,d2=2,d3=3,d4=4;
TCNT1 = 0;
while (ACSR &(1<<ACO)){
if (TIFR1&(1<<TOV1)) {
Nsignal--;
TIFR1 = _BV(TOV1);
if (Nsignal <= 0) {break;}
}
}
while ((ACSR &(1<<ACO))==0){
if (TIFR1&(1<<TOV1)) {
Nsignal--;
TIFR1 = _BV(TOV1);
if (Nsignal <= 0) {break;}
}
}
if (Nsignal <= 0) {break;}
TCNT1 = 0;
while (ACSR &(1<<ACO)){
if (TIFR1&(1<<TOV1)) {
Ncycle01++;
TIFR1 = _BV(TOV1);
if (Ncycle01 >= 2) {break;}
}
}
d1 = ICR1;
while ((ACSR &(1<<ACO))==0){
if (TIFR1&(1<<TOV1)) {
Ncycle12++;
TIFR1 = _BV(TOV1);
if (Ncycle12 >= 3) {break;}
}
}
while (ACSR &(1<<ACO)){
if (TIFR1&(1<<TOV1)) {
Ncycle12++;
TIFR1 = _BV(TOV1);
if (Ncycle12 >= 6) {break;}
}
}
d2 = ICR1;
while ((ACSR &(1<<ACO))==0){
if (TIFR1&(1<<TOV1)) {
Ncycle23++;
TIFR1 = _BV(TOV1);
if (Ncycle23 >= 3) {break;}
}
}
while (ACSR &(1<<ACO)){
if (TIFR1&(1<<TOV1)) {
Ncycle23++;
TIFR1 = _BV(TOV1);
if (Ncycle23 >= 6) {break;}
}
}
d3 = ICR1;
while ((ACSR &(1<<ACO))==0){
if (TIFR1&(1<<TOV1)) {
Ncycle34++;
TIFR1 = _BV(TOV1);
if (Ncycle34 >= 3) {break;}
}
}
while (ACSR &(1<<ACO)){
if (TIFR1&(1<<TOV1)) {
Ncycle34++;
TIFR1 = _BV(TOV1);
if (Ncycle34 >= 6) {break;}
}
}
d4 = ICR1;
unsigned long codefreq1 = 1600000000/(65536*Ncycle12+d2-d1);
unsigned long codefreq2 = 1600000000/(65536*Ncycle23+d3-d2);
unsigned long codefreq3 = 1600000000/(65536*Ncycle34+d4-d3);
unsigned long codefreq = (codefreq1 + codefreq2 + codefreq3)/3;
if (d3==d4) codefreq = 5000;
if ((codefreq < 310000) and (codefreq >= 10000)) {
if (FSKtx == 0 & freqcheck(freq)==0){
digitalWrite(12,0);
digitalWrite(13,1);
delay(10);
si5351.output_enable(SI5351_CLK0, 1); //TX on
lcd.setCursor(0,7);
lcd.print("T");
}
si5351.set_freq((freq*100ULL + codefreq), SI5351_CLK0);
FSKtx = 1;
}
else{
FSK--;
}
}
si5351.output_enable(SI5351_CLK0, 0); //TX off
lcd.setCursor(0,7);
lcd.print("R");
if(Serial.available() > 0) cat();
si5351.set_freq(freq*100ULL, SI5351_CLK1);
delay(10);
digitalWrite(12,1);
digitalWrite(13,0);
FSKtx = 0;
}
//remote contol (simulating TS-2000)
//"ft8qrp_cat11.ico" from https://www.elektronik-labor.de/HF/FT8QRP.html
//slightly modified
void cat(void)
{
String received;
String receivedPart1;
String receivedPart2;
String command;
String command2;
String parameter;
String parameter2;
String sent;
String sent2;
received = Serial.readString();
received.toUpperCase();
received.replace("\n","");
String data = "";
int bufferIndex = 0;
for (int i = 0; i < received.length(); ++i)
{
char c = received[i];
if (c != ';')
{
data += c;
}
else
{
if (bufferIndex == 0)
{
data += '\0';
receivedPart1 = data;
bufferIndex++;
data = "";
}
else
{
data += '\0';
receivedPart2 = data;
bufferIndex++;
data = "";
}
}
}
command = receivedPart1.substring(0,2);
command2 = receivedPart2.substring(0,2);
parameter = receivedPart1.substring(2,receivedPart1.length());
parameter2 = receivedPart2.substring(2,receivedPart2.length());
sent = String("?;"); //added
sent2 = String("?;"); //added
if (command == "FA")
{
if (parameter != "")
{
freq = parameter.toInt();
freqchangeflag=1; //added
//VfoRx = VfoTx;
}
sent = "FA" // Return 11 digit frequency in Hz.
+ String("00000000000").substring(0,11-(String(freq).length()))
+ String(freq) + ";";
}
else if (command == "PS")
{
sent = "PS1;";
}
else if (command == "TX")
{
sent = "TX0;";
//VfoTx = freq;
//digitalWrite(13,1);
TxStatus = 1;
}
else if (command == "RX")
{
sent = "RX0;";
//VfoRx = freq;
//digitalWrite(13,0);
TxStatus = 0;
}
else if (command == "ID")
{
sent = "ID019;";
}
else if (command == "AI")
{
sent = "AI0;";
}
else if (command == "IF")
{
if (TxStatus == 1)
{
sent = "IF" // Return 11 digit frequency in Hz.
+ String("00000000000").substring(0,11-(String(freq).length()))
//+ String(freq) + String(" ") + "+" + "0000" + "0" + "0" + "0" + "00" + "0" + String(mode) + "0" + "0" + "0" + "0" + "00" + String(" ") + ";";
+ String(freq) + "00000" + "+" + "0000" + "0" + "0" + "0" + "00" + "1" + String(mode) + "0" + "0" + "0" + "0" + "000" + ";";
}
else
{
sent = "IF" // Return 11 digit frequency in Hz.
+ String("00000000000").substring(0,11-(String(freq).length()))
//+ String(freq) + String(" ") + "+" + "0000" + "0" + "0" + "0" + "00" + "0" + String(mode) + "0" + "0" + "0" + "0" + "00" + String(" ") + ";";
+ String(freq) + "00000" + "+" + "0000" + "0" + "0" + "0" + "00" + "0" + String(mode) + "0" + "0" + "0" + "0" + "000" + ";";
}
}
else if (command == "MD")
{
sent = "MD2;";
}
//------------------------------------------------------------------------------
if (command2 == "ID")
{
sent2 = "ID019;";
}
if (bufferIndex == 2)
{
Serial.print(sent2);
}
else
{
Serial.print(sent);
}
if ((command == "RX") or (command = "TX")) delay(50);
sent = String("");
sent2 = String("");
}
//LCD frequency display (8x2)
void lcd_disp(long int frequency, int cursolposition)
{
lcd.setCursor(1,0);
lcd.print(" ");
String freqString = String(frequency, DEC);
lcd.setCursor(1,8-freqString.length());
lcd.print(freqString);
lcd.setCursor(1,cursolposition-1);
}
//prevention of out-of-band transmission (in JA)
long int freq_in_band(long int frequency, long int freqset)
{
long int freq_in_band;
if (freqset < 135700) {
freq_in_band=135700;
return freq_in_band;
}
else if (freqset > 135800 && freqset < 472000) {
if (freqset>frequency) freq_in_band=472000;
else freq_in_band=135800;
return freq_in_band;
}
else if (freqset > 479000 && freqset < 1800000) {
if (freqset>frequency) freq_in_band=1800000;
else freq_in_band=479000;
return freq_in_band;
}
else if (freqset > 1875000 && freqset < 1907500) {
if (freqset>frequency) freq_in_band=1907500;
else freq_in_band=1875000;
return freq_in_band;
}
else if (freqset > 1912500 && freqset < 3500000) {
if (freqset>frequency) freq_in_band=3500000;
else freq_in_band=1912500;
return freq_in_band;
}
else if (freqset > 3580000 && freqset < 3662000) {
if (freqset>frequency) freq_in_band=3662000;
else freq_in_band=3580000;
return freq_in_band;
}
else if (freqset > 3687000 && freqset < 3716000) {
if (freqset>frequency) freq_in_band=3716000;
else freq_in_band=3687000;
return freq_in_band;
}
else if (freqset > 3770000 && freqset < 3791000) {
if (freqset>frequency) freq_in_band=3791000;
else freq_in_band=3770000;
return freq_in_band;
}
else if (freqset > 3805000 && freqset < 7000000) {
if (freqset>frequency) freq_in_band=7000000;
else freq_in_band=3805000;
return freq_in_band;
}
else if (freqset > 7200000 && freqset < 10100000) {
if (freqset>frequency) freq_in_band=10100000;
else freq_in_band=7200000;
return freq_in_band;
}
else if (freqset > 10150000 && freqset < 14000000) {
if (freqset>frequency) freq_in_band=14000000;
else freq_in_band=10150000;
return freq_in_band;
}
else if (freqset > 14350000 && freqset < 18068000) {
if (freqset>frequency) freq_in_band=18068000;
else freq_in_band=14350000;
return freq_in_band;
}
else if (freqset > 18168000 && freqset < 21000000) {
if (freqset>frequency) freq_in_band=21000000;
else freq_in_band=18168000;
return freq_in_band;
}
else if (freqset > 21450000 && freqset < 24890000) {
if (freqset>frequency) freq_in_band=24890000;
else freq_in_band=21450000;
return freq_in_band;
}
else if (freqset > 24990000 && freqset < 28000000) {
if (freqset>frequency) freq_in_band=28000000;
else freq_in_band=24990000;
return freq_in_band;
}
else if (freqset > 29700000 && freqset < 50000000) {
if (freqset>frequency) freq_in_band=50000000;
else freq_in_band=29700000;
return freq_in_band;
}
else if (freqset > 54000000) {
freq_in_band=54000000;
return freq_in_band;
}
else {
freq_in_band=freqset;
return freq_in_band;
}
}
//checking for the prevention of out-of-band transmission (in JA)
int freqcheck(long int frequency) // retern 1=out-of-band, 0=in-band
{
if (frequency < 135700) {
return 1;
}
else if (frequency > 135800 && frequency < 472000) {
return 1;
}
else if (frequency > 479000 && frequency < 1800000) {
return 1;
}
else if (frequency > 1875000 && frequency < 1907500) {
return 1;
}
else if (frequency > 1912500 && frequency < 3500000) {
return 1;
}
else if (frequency > 3580000 && frequency < 3662000) {
return 1;
}
else if (frequency > 3687000 && frequency < 3716000) {
return 1;
}
else if (frequency > 3770000 && frequency < 3791000) {
return 1;
}
else if (frequency > 3805000 && frequency < 7000000) {
return 1;
}
else if (frequency > 7200000 && frequency < 10100000) {
return 1;
}
else if (frequency > 10150000 && frequency < 14000000) {
return 1;
}
else if (frequency > 14350000 && frequency < 18068000) {
return 1;
}
else if (frequency > 18168000 && frequency < 21000000) {
return 1;
}
else if (frequency > 21450000 && frequency < 24890000) {
return 1;
}
else if (frequency > 24990000 && frequency < 28000000) {
return 1;
}
else if (frequency > 29700000 && frequency < 50000000) {
return 1;
}
else if (frequency > 54000000) {
return 1;
}
else return 0;
}