68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
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/*
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* RS41.h
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* Functions for decoding RS41 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 RS41_h
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#define RS41_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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/* Main class */
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class RS41
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{
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private:
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uint32_t bits2val(const uint8_t *bits, int len);
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void printRaw(uint8_t *data, int len);
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void bitsToBytes(uint8_t *bits, uint8_t *bytes, int len);
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int decode41(byte *data, int maxlen);
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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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boolean initialized = false;
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public:
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RS41();
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// New interface:
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// setup() is called when channel is activated (sets mode and frequency and activates receiver)
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int setup(float frequency);
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// processRXbyte is called by background task for each received byte
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// should be fast enough to not cause sx127x fifo buffer overflow
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// void processRXbyte(uint8_t data);
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// is called approx. 1x per second, may do some post-processing of received data
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// and update information in sonde data structure
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// returns infomration about sucess/error (for timers and for quality bar in display)
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int receive();
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int waitRXcomplete();
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//int receiveFrame();
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int use_ecc = 1;
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};
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extern RS41 rs41;
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#endif
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