RadioSonde/libraries/SondeLib/DFM.h
2022-08-24 08:28:06 +02:00

68 lines
1.5 KiB
C++
Executable File

/*
* DFM.h
* Functions for decoding DFM sondes with SX127x chips
* Copyright (C) 2019 Hansi Reiser, dl9rdz
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef DFM_h
#define DFM_h
#include <stdlib.h>
#include <stdint.h>
#include <Arduino.h>
#ifndef inttypes_h
#include <inttypes.h>
#endif
#define DFM_NORMAL 0
#define DFM_INVERSE 1
/* Main class */
class DFM
{
private:
int inverse=0;
void deinterleave(uint8_t *str, int L, uint8_t *block);
uint32_t bits2val(const uint8_t *bits, int len);
int check(uint8_t code[8]);
int hamming(uint8_t *ham, int L, uint8_t *sym);
void printRaw(const char *prefix, int len, int ret, const uint8_t* data);
void decodeCFG(uint8_t *cfg);
void decodeDAT(uint8_t *dat);
void bitsToBytes(uint8_t *bits, uint8_t *bytes, int len);
#define B 8
#define S 4
uint8_t hamming_conf[ 7*B]; // 7*8=56
uint8_t hamming_dat1[13*B]; // 13*8=104
uint8_t hamming_dat2[13*B];
uint8_t block_conf[ 7*S]; // 7*4=28
uint8_t block_dat1[13*S]; // 13*4=52
uint8_t block_dat2[13*S];
uint8_t H[4][8] = // extended Hamming(8,4) particy check matrix
{{ 0, 1, 1, 1, 1, 0, 0, 0},
{ 1, 0, 1, 1, 0, 1, 0, 0},
{ 1, 1, 0, 1, 0, 0, 1, 0},
{ 1, 1, 1, 0, 0, 0, 0, 1}};
uint8_t He[8] = { 0x7, 0xB, 0xD, 0xE, 0x8, 0x4, 0x2, 0x1}; // Spalten von H:
// 1-bit-error-Syndrome
public:
DFM();
// main decoder API
int setup(float frequency, int inverse);
int receive();
int waitRXcomplete();
int use_ecc = 1;
};
extern DFM dfm;
#endif