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