// 2.11.2018, Arduino IDE v1.8.7, v0.2
// CW Beacon using Si5351, LZ2WSG, KN34PC
// MODIFICATO AD USO A.R.D.F. by IK1LBW ( giugno 2020)
#include "si5351.h"
#define PIN_SP 10 //monitor audio pin 10 arduino
#define PIN_TX 13 //led cw pin 13 arduino
Si5351 si5351(0x60);
uint16_t duration = 160; //valore velocita' cw (80-100)(maggiore e' il valore...minore WPM)
uint16_t hz = 1750; //valore nota monitor al pin 10 di arduino
String cw_message = "T T T T"; //inserire il msg. da trasmettere (maiuscolo) settate una serie di < T >
uint32_t tx = 144100000; // inserire freq. tx (es.)--> 144.444 mhz= 144444000
//---------------------------------------------------------------------------------------------------------
void setup() {
pinMode(PIN_TX, OUTPUT);
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 25000000, 0);
si5351.set_freq(tx * SI5351_FREQ_MULT, SI5351_CLK1);
si5351.output_enable(SI5351_CLK1, 0);
si5351.drive_strength(SI5351_CLK1,SI5351_DRIVE_8MA); // variazione pwr out da 2 a 8 ma
}
//---------------------------------------------------------------------------------------------------------
void loop() {
cw_string_proc(cw_message); // durata pausa tra msg. e portante fissa bcn (>1500)
delay(2000);
cw(true);
delay(6000); // durata portante fissa tx a.r.d.f. (>5000)
cw(false);
delay(4000); // durata spazio tra portante fissa tx a.r.d.f. e inizio msg. (>3000)
}
//---------------------------------------------------------------------------------------------------------
void cw_string_proc(String str) { // processing string to characters
for (uint8_t j = 0; j < str.length(); j++)
cw_char_proc(str[j]);
}
//---------------------------------------------------------------------------------------------------------
void cw_char_proc(char m) { // processing characters to Morse code symbols
String s;
if (m == ' ') { // пауза между думите
word_space();
return;
}
if (m > 96) // ACSII, case change a-z to A-Z
if (m < 123)
m -= 32;
switch (m) {
case 'T': s = "-#"; break; // CODICE MORSE...LETTERA UTILIZZATA " T "
}
for (uint8_t i = 0; i < 7; i++) {
switch (s[i]) {
case '.': ti(); break; // TI (punto)
case '-': ta(); break; // TA (linea)
case '#': char_space(); return; // end of Morse code symbol
}
}
}
//---------------------------------------------------------------------------------------------------------
void ti() {
cw(true); // TX TI (punto)
delay(duration);
cw(false); // stop TX TI (punto)
delay(duration);
}
//---------------------------------------------------------------------------------------------------------
void ta() {
cw(true); // TX TA (linea)//valore modificato x allungare la nota.. originale = delay(3 * duration)
delay(18 * duration);
cw(false); // stop TX TA (linea)
delay(duration);
}
//---------------------------------------------------------------------------------------------------------
void char_space() { // 3x, пауза между буквите
delay(2 * duration); // 1 from element-end + 2 new
}
//---------------------------------------------------------------------------------------------------------
void word_space() { // 7x, пауза между думите
delay(6 * duration); // 1 from element-end + 6 new
}
//---------------------------------------------------------------------------------------------------------
void cw(bool state) { // TX-CW, monitor>TX-LED, monitor audio> 3000 Hz sound
if (state) {
si5351.output_enable(SI5351_CLK1, 1); // uscita r.f. su CLK1
digitalWrite(PIN_TX, HIGH);
tone(PIN_SP, hz);
}
else {
si5351.output_enable(SI5351_CLK1, 0);
digitalWrite(PIN_TX, LOW);
noTone(PIN_SP);
}
}