NT7S

uint8_t led = LED_BUILTIN;

void setup() {
  SerialUSB.begin(57600);
  pinMode(led, OUTPUT);
}

void loop() {
  if(SerialUSB.rts()) {
    digitalWrite(led, HIGH);

turingbirds

NT7S

uint8_t  sine_wave[256] = {
  0x80, 0x83, 0x86, 0x89, 0x8C, 0x90, 0x93, 0x96,
  0x99, 0x9C, 0x9F, 0xA2, 0xA5, 0xA8, 0xAB, 0xAE,
  0xB1, 0xB3, 0xB6, 0xB9, 0xBC, 0xBF, 0xC1, 0xC4,
  0xC7, 0xC9, 0xCC, 0xCE, 0xD1, 0xD3, 0xD5, 0xD8,
  0xDA, 0xDC, 0xDE, 0xE0, 0xE2, 0xE4, 0xE6, 0xE8,
  0xEA, 0xEB, 0xED, 0xEF, 0xF0, 0xF1, 0xF3, 0xF4,
  0xF5, 0xF6, 0xF8, 0xF9, 0xFA, 0xFA, 0xFB, 0xFC,
  0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFE, 0xFE, 0xFD,

NT7S

//
// Simple JT9 beacon for Arduino, with the Etherkit Si5351A Breakout
// Board, by Jason Milldrum NT7S.
//
// Transmit an abritrary message of up to 13 valid characters
// (a Type 6 message).
// 
// Original code based on Feld Hell beacon for Arduino by Mark 
// Vandewettering K6HX, adapted for the Si5351A by Robert 
// Liesenfeld AK6L <ak6l@ak6l.org>.  Timer setup

NT7S

//
// Simple JT9 beacon for Arduino, with the Etherkit Si5351A Breakout
// Board, by Jason Milldrum NT7S.
//
// Transmit an abritrary message of up to 13 valid characters
// (a Type 6 message).
// 
// Original code based on Feld Hell beacon for Arduino by Mark 
// Vandewettering K6HX, adapted for the Si5351A by Robert 
// Liesenfeld AK6L <ak6l@ak6l.org>.  Timer setup

NT7S

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <ctype.h>

uint8_t jt_code(char c)
{
	/* Validate the input then return the proper integer code */
	// Return 255 as an error code if the char is not allowed

NT7S

gcc jt65_encode.c encode_rs_int.c init_rs_int.c -o jt65_encode

NT7S

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <ctype.h>

uint8_t wspr_code(char c)
{
	/* Validate the input then return the proper integer code */
	// Return 255 as an error code if the char is not allowed

la3pna

[00:06] <LA3PNA2> NT7S, when you find a break, would you mind sketchin out how you determined the PLL parameters for the Si? I kinda would like to use that if I do a beacon
[00:09] <NT7S> my algorithm?
[00:12] <LA3PNA2> more like, if we could figure out a program that determines the PLL freq and such when you input your wanted frequency
[00:13] <NT7S> ah
[00:14] <LA3PNA2> basicaly I'd like to be able to use that in the beacon
[00:14] <LA3PNA2> but, you should get on the JT9 first
[00:14] <NT7S> the general strategy is find a PLL frequency that is the highest integer divisor for the output frequency
[00:15] <NT7S> then tweak the PLL frequency the PPB to correct for the ref osc error
[00:15] <NT7S> so the divider for the PLL synth will not be an integer divider, but in many cases the multisynth will be
[00:16] <LA3PNA2> ah, so you aim for the multisynt to be a integer

NT7S

Homebrew Arduino Zero Tool Setup

A guide for installing the tools necessary to build up a homebrew barebones Arduino Zero (based on the Atmel SAMD21G18A microcontroller) on a Linux PC. While this guide is written for a Debian-based distribution such as Linux Mint, it should be adaptable to other distributions fairly easily.

This guide also assumes that we will be using the ATMEL-ICE debugger to write the Arduino bootloader to the SAMD21G18A flash memory via the Cortex Debug Connector.

Install Arduino IDE

You'll need a recent version of the Arduino IDE which has support for the Arduino Zero in the Boards Manager. As of this writing, the latest stable version is 1.6.5, so be sure to use at least this version. Also as of this writing, the version of the Arduino IDE in the Linux Mint repositories is quite old, so don't use that one.