kg4sgp

/* This produces raised cosine bpsk*/

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

typedef struct {
	long sample_rate;
	long samples_per_symbol;
	long max_amp;

kg4sgp

// An ASK Demodulator
// Simplicity first. Get it working, then improve!
// gcc ask-demod.c -o askdemod -lm -Wall
// Usage: ./ask-demod ask-msg.raw ask-msg.txt

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>

kg4sgp

// Arduino RTTY Modulator
// Uses Fast PWM to produce ~8kHz 8bit audio

#include "baudot.h"
#include "pwmsine.h"

// Yeah, I really need to get rid of these globals.
// Thats next on the to-do list

unsigned int sampleRate = 31250;

kg4sgp

// Goertzel Demodulator
//
// This program demodulates two tone FSK using the goertzel algorithm.

#include <stdio.h>
#include <math.h>

struct gConstants {
  float f1norm;
  float f2norm;

kg4sgp

// Program to make a table of sine values.
// I release this to public domain.

#include<stdio.h>
#include<math.h>

int main(){

  float pi = 3.14159265358979323846264338327;
  int max = pow(2,7); // this should be HALF the value for 16bits so (2^16)/2

kg4sgp

import java.io._

object Baudot {
  val ShiftToFigures = 0x1b
  val ShiftToLetters = 0x1f

  val figures = Map(
    0.toChar -> 0x0,
    ' '      -> 0x4,
    '1'      -> 0x1d,

kg4sgp

// Jimmy Carter - KG4SGP 
// ax.25 UI framer
// compile with gcc aframe.c -o aframe

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

#define poly (0x1201)

unsigned char flag = 0x7e;          //ax.25 start/stop flag

kg4sgp

// Jimmy Carter - KG4SGP 
// ax.25 UI framer
// compile with gcc aframe.c -o aframe

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

#define poly (0x1201)

unsigned char flag = 0x7e;          //ax.25 start/stop flag

kg4sgp

// Jimmy Carter - KG4SGP 
// ax.25 UI framer
// compile with gcc aframe.c -o aframe

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

#define poly (0x1201)

unsigned char flag = 0x7e;          //ax.25 start/stop flag

kg4sgp

// Jimmy Carter - KG4SGP 
// ax.25 UI framer
// compile with gcc aframe.c -o aframe

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

#define poly (0x1201)

unsigned char flag = 0x7e;          //ax.25 start/stop flag