kopia lustrzana https://github.com/rs1729/RS
1290 wiersze
41 KiB
C
1290 wiersze
41 KiB
C
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/*
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* dfm09 (dfm06)
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* sync header: correlation/matched filter
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* files: dfm09mod.c demod_mod.h demod_mod.c
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* compile:
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* gcc -c demod_mod.c
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* gcc dfm09mod.c demod_mod.o -lm -o dfm09mod
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*
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* author: zilog80
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#ifdef CYGWIN
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#include <fcntl.h> // cygwin: _setmode()
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#include <io.h>
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#endif
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#include "demod_mod.h"
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typedef struct {
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i8_t vbs; // verbose output
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i8_t raw; // raw frames
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i8_t crc; // CRC check output
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i8_t ecc; // Reed-Solomon ECC
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i8_t sat; // GPS sat data
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i8_t ptu; // PTU: temperature
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i8_t inv;
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i8_t aut;
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i8_t jsn; // JSON output (auto_rx)
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i8_t dst; // continuous pcks 0..8
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i8_t dbg;
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} option_t;
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typedef struct {
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int ec;
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float ts;
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} pcksts_t;
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typedef struct {
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ui8_t max_ch;
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ui8_t nul_ch;
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ui8_t sn_ch;
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ui8_t chXbit;
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ui32_t SN_X;
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ui32_t chX[2];
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} sn_t;
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typedef struct {
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ui32_t prn; // SVs used (PRN)
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float dMSL; // Alt_MSL - Alt_ellipsoid = -N = - geoid_height = ellipsoid - geoid
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ui8_t nSV; // numSVs used
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} gpsdat_t;
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#define BITFRAME_LEN 280
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typedef struct {
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int frnr;
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int sonde_typ;
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ui32_t SN6;
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ui32_t SN;
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int week; int gpssec;
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int jahr; int monat; int tag;
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int std; int min; float sek;
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double lat; double lon; double alt;
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double dir; double horiV; double vertV;
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float meas24[5+2];
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float status[2];
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float _frmcnt;
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char sonde_id[16]; // "ID__:xxxxxxxx\0\0"
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hsbit_t frame[BITFRAME_LEN+4]; // char frame_bits[BITFRAME_LEN+4];
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char dat_str[9][13+1];
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sn_t snc;
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pcksts_t pck[9];
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option_t option;
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int ptu_out;
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gpsdat_t gps;
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} gpx_t;
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//#define HEADLEN 32
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// DFM09: Manchester2: 01->1,10->0
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static char dfm_rawheader[] = "10011010100110010101101001010101"; //->"0100010111001111"; // 0x45CF (big endian)
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static char dfm_header[] = "0100010111001111";
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/* ------------------------------------------------------------------------------------ */
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#define BAUD_RATE 2500
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/* ------------------------------------------------------------------------------------ */
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#define B 8 // codeword: 8 bit
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#define S 4 // davon 4 bit data
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#define HEAD 0 // 16 bit
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#define CONF (16+0) // 56 bit
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#define DAT1 (16+56) // 104 bit
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#define DAT2 (16+160) // 104 bit
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// frame: 280 bit
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static ui8_t G[8][4] = // Generator
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{{ 1, 0, 0, 0},
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{ 0, 1, 0, 0},
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{ 0, 0, 1, 0},
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{ 0, 0, 0, 1},
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{ 0, 1, 1, 1},
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{ 1, 0, 1, 1},
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{ 1, 1, 0, 1},
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{ 1, 1, 1, 0}};
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static ui8_t H[4][8] = // Parity-Check
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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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static ui8_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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static ui8_t codewords[16][8]; // (valid) Hamming codewords
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static int nib4bits(ui8_t nib, ui8_t *bits) { // big endian
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int j;
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nib &= 0xF;
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for (j = 0; j < 4; j++) {
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bits[j] = (nib>>(3-j)) & 0x1;
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}
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return 0;
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}
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static int gencode(ui8_t msg[4], ui8_t code[8]) {
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int i, j; // Gm=c
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for (i = 0; i < 8; i++) {
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code[i] = 0;
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for (j = 0; j < 4; j++) {
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code[i] ^= G[i][j] & msg[j];
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}
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}
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return 0;
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}
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static ui32_t bits2val(ui8_t *bits, int len) { // big endian
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int j;
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ui32_t val;
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if ((len < 0) || (len > 32)) return -1; // = 0xFFFF
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val = 0;
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for (j = 0; j < len; j++) {
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val |= (bits[j] << (len-1-j));
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}
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return val;
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}
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static void deinterleave(hsbit_t *str, int L, hsbit_t *block) {
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int i, j;
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for (j = 0; j < B; j++) { // L = 7, 13
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for (i = 0; i < L; i++) {
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block[B*i+j] = str[L*j+i];
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}
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}
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}
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static int check(int opt_ecc, hsbit_t code[8]) {
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int i, j; // Bei Demodulierung durch Nulldurchgaenge, wenn durch Fehler ausser Takt,
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ui32_t synval = 0; // verschieben sich die bits. Fuer Hamming-Decode waere es besser,
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ui8_t syndrom[4]; // sync zu Beginn mit Header und dann Takt beibehalten fuer decision.
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int ret=0;
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for (i = 0; i < 4; i++) { // S = 4
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syndrom[i] = 0;
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for (j = 0; j < 8; j++) { // B = 8
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syndrom[i] ^= H[i][j] & code[j].hb;
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}
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}
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synval = bits2val(syndrom, 4);
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if (synval) {
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ret = -1;
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for (j = 0; j < 8; j++) { // 1-bit-error
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if (synval == He[j]) { // reicht auf databits zu pruefen, d.h.
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ret = j+1; // (systematischer Code) He[0..3]
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break;
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}
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}
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}
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else ret = 0;
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if (ret > 0) code[ret-1].hb ^= 0x1; // d=1: 1-bit-error
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else if (ret < 0 && opt_ecc == 2) { // d=2: 2-bit-error: soft decision
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// Hamming(8,4)
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// 256 words:
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// 16 codewords
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// 16*8=128 1-error words (dist=1)
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// 16*7=112 2-error words (dist=2)
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// each 2-error word has 4 codewords w/ dist=2,
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// choose best match/correlation
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int n;
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int maxn = -1;
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int d = 0;
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float sum = 0.0;
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float maxsum = 0.0;
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/*
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sum = 0.0; // s<0: h=0 , s>0: h=1
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for (i = 0; i < 8; i++) { // h\in{0,1} -> 2h-1\in{-1,+1}
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sum += (2*code[i].hb-1)*code[i].sb; // i.e. sum_i |s_i|
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} // original score
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*/
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for (n = 0; n < 16; n++) {
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d = 0;
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for (i = 0; i < 8; i++) { // d(a,b) = sum_i a[i]^b[i]
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if (code[i].hb != codewords[n][i]) d++;
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}
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if (d == 2) { // check dist=2 codewords - in principle, all codewords could be tested
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// softbits correlation:
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// - interleaving
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// + no pulse-shaping -> sum
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sum = 0.0;
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for (i = 0; i < 8; i++) {
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sum += (2*codewords[n][i]-1) * code[i].sb;
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}
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if (sum >= maxsum) { // best match
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maxsum = sum;
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maxn = n;
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}
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}
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}
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if (maxn >= 0) {
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for (i = 0; i < 8; i++) {
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if (code[i].hb = codewords[maxn][i]);
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}
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}
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}
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return ret;
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}
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static int hamming(int opt_ecc, hsbit_t *ham, int L, ui8_t *sym) {
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int i, j;
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int ecc = 0, ret = 0; // L = 7, 13
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for (i = 0; i < L; i++) { // L * 2 nibble (data+parity)
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if (opt_ecc) {
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ecc = check(opt_ecc, ham+B*i);
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if (ecc > 0) ret |= (1<<i);
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if (ecc < 0) ret |= ecc; // -1
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}
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for (j = 0; j < S; j++) { // systematic: bits 0..S-1 data
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sym[S*i+j] = ham[B*i+j].hb;
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}
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}
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return ret;
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}
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static char nib2chr(ui8_t nib) {
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char c = '_';
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if (nib < 0x10) {
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if (nib < 0xA) c = 0x30 + nib;
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else c = 0x41 + nib-0xA;
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}
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return c;
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}
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static int cnt_biterr(int ec) {
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int i;
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ui8_t ecn = 0;
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for (i = 0; i < 15; i++) {
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if ( (ec>>i)&1 ) ecn++;
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}
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return ecn;
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}
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static int dat_out(gpx_t *gpx, ui8_t *dat_bits, int ec) {
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int i, ret = 0;
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int fr_id;
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// int jahr = 0, monat = 0, tag = 0, std = 0, min = 0;
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int frnr = 0;
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int msek = 0;
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int lat = 0, lon = 0, alt = 0;
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int nib;
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int dvv; // signed/unsigned 16bit
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fr_id = bits2val(dat_bits+48, 4);
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if (fr_id >= 0 && fr_id <= 8) {
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for (i = 0; i < 13; i++) {
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nib = bits2val(dat_bits+4*i, 4);
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gpx->dat_str[fr_id][i] = nib2chr(nib);
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}
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gpx->dat_str[fr_id][13] = '\0';
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gpx->pck[fr_id].ts = gpx->_frmcnt; // time_stamp,frame_count,...
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if (gpx->option.ecc) {
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gpx->pck[fr_id].ec = ec; // option_ecc laesst -1 garnicht durch
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if (ec > 0) {
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ui8_t ecn = cnt_biterr(ec);
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gpx->pck[fr_id].ec = ecn;
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if ((gpx->option.dst || gpx->option.jsn) && ecn > 4) gpx->pck[fr_id].ec = -2; // threshold: #errors > 4
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}
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}
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}
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// GPS data
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// SiRF msg ID 41: Geodetic Navigation Data
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if (fr_id == 0) {
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//start = 0x1000;
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frnr = bits2val(dat_bits+24, 8);
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gpx->frnr = frnr;
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}
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if (fr_id == 1) {
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// 00..31: GPS-Sats in solution (bitmap)
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gpx->gps.prn = bits2val(dat_bits, 32); // SV/PRN used
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msek = bits2val(dat_bits+32, 16); // UTC (= GPS - 18sec ab 1.1.2017)
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gpx->sek = msek/1000.0;
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}
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if (fr_id == 2) {
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lat = bits2val(dat_bits, 32);
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gpx->lat = lat/1e7;
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dvv = (short)bits2val(dat_bits+32, 16); // (short)? zusammen mit dir sollte unsigned sein
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gpx->horiV = dvv/1e2;
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}
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if (fr_id == 3) {
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lon = bits2val(dat_bits, 32);
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gpx->lon = lon/1e7;
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dvv = bits2val(dat_bits+32, 16) & 0xFFFF; // unsigned
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gpx->dir = dvv/1e2;
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}
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if (fr_id == 4) {
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alt = bits2val(dat_bits, 32);
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gpx->alt = alt/1e2;
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dvv = (short)bits2val(dat_bits+32, 16); // signed
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gpx->vertV = dvv/1e2;
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}
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if (fr_id == 5) {
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short dMSL = bits2val(dat_bits, 16);
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gpx->gps.dMSL = dMSL/1e2;
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}
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if (fr_id == 6) { // sat data
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}
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if (fr_id == 7) { // sat data
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}
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if (fr_id == 8) {
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gpx->jahr = bits2val(dat_bits, 12);
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gpx->monat = bits2val(dat_bits+12, 4);
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gpx->tag = bits2val(dat_bits+16, 5);
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gpx->std = bits2val(dat_bits+21, 5);
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gpx->min = bits2val(dat_bits+26, 6);
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gpx->gps.nSV = bits2val(dat_bits+32, 8);
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}
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ret = fr_id;
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return ret;
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}
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// DFM-06 (NXP8)
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static float fl20(int d) { // float20
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int val, p;
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float f;
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p = (d>>16) & 0xF;
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val = d & 0xFFFF;
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f = val/(float)(1<<p);
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return f;
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}
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/*
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static float flo20(int d) {
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int m, e;
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float f1, f;
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m = d & 0xFFFF;
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e = (d >> 16) & 0xF;
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f = m / pow(2,e);
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return f;
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}
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*/
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// DFM-09 (STM32)
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static float fl24(int d) { // float24
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int val, p;
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float f;
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p = (d>>20) & 0xF;
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val = d & 0xFFFFF;
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f = val/(float)(1<<p);
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return f;
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}
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// temperature approximation
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static float get_Temp(gpx_t *gpx) { // meas[0..4]
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// NTC-Thermistor EPCOS B57540G0502
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// R/T No 8402, R25=Ro=5k
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// B0/100=3450
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// 1/T = 1/To + 1/B log(r) , r=R/Ro
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// GRAW calibration data -80C..+40C on EEPROM ?
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// meas0 = g*(R + Rs)
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// meas3 = g*Rs , Rs: dfm6:10k, dfm9:20k
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// meas4 = g*Rf , Rf=220k
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float f = gpx->meas24[0],
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f1 = gpx->meas24[3],
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f2 = gpx->meas24[4];
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if (gpx->ptu_out >= 0xC) {
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f = gpx->meas24[0+1];
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f1 = gpx->meas24[3+2];
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f2 = gpx->meas24[4+2];
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}
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//float *meas = gpx->meas24;
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float B0 = 3260.0; // B/Kelvin, fit -55C..+40C
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float T0 = 25 + 273.15; // t0=25C
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float R0 = 5.0e3; // R0=R25=5k
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float Rf = 220e3; // Rf = 220k
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float g = f2/Rf;
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float R = (f-f1) / g; // meas[0,3,4] > 0 ?
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float T = 0; // T/Kelvin
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if (f*f1*f2 == 0) R = 0;
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if (R > 0) T = 1/(1/T0 + 1/B0 * log(R/R0));
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return T - 273.15; // Celsius
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// DFM-06: meas20 * 16 = meas24
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// -> (meas24[0]-meas24[3])/meas24[4]=(meas20[0]-meas20[3])/meas20[4]
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}
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static float get_Temp2(gpx_t *gpx) { // meas[0..4]
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// NTC-Thermistor EPCOS B57540G0502
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// R/T No 8402, R25=Ro=5k
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// B0/100=3450
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// 1/T = 1/To + 1/B log(r) , r=R/Ro
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// GRAW calibration data -80C..+40C on EEPROM ?
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// meas0 = g*(R+Rs)+ofs
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// meas3 = g*Rs+ofs , Rs: dfm6:10k, dfm9:20k
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// meas4 = g*Rf+ofs , Rf=220k
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float f = gpx->meas24[0],
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f1 = gpx->meas24[3],
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f2 = gpx->meas24[4];
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if (gpx->ptu_out >= 0xC) {
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f = gpx->meas24[0+1];
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f1 = gpx->meas24[3+2];
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f2 = gpx->meas24[4+2];
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}
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float B0 = 3260.0; // B/Kelvin, fit -55C..+40C
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float T0 = 25 + 273.15; // t0=25C
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float R0 = 5.0e3; // R0=R25=5k
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float Rf2 = 220e3; // Rf2 = Rf = 220k
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float g_o = f2/Rf2; // approx gain
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float Rs_o = f1/g_o; // = Rf2 * f1/f2;
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float Rf1 = Rs_o; // Rf1 = Rs: dfm6:10k, dfm9:20k
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float g = g_o; // gain
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float Rb = 0.0; // offset
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float R = 0; // thermistor
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float T = 0; // T/Kelvin
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// ptu_out=0xD: Rs_o=13.6, Rf2=?
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if ( 8e3 < Rs_o && Rs_o < 12e3) Rf1 = 10e3; // dfm6
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else if (18e3 < Rs_o && Rs_o < 22e3) Rf1 = 20e3; // dfm9
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g = (f2 - f1) / (Rf2 - Rf1);
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Rb = (f1*Rf2-f2*Rf1)/(f2-f1); // ofs/g
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R = (f-f1)/g; // meas[0,3,4] > 0 ?
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if (R > 0) T = 1/(1/T0 + 1/B0 * log(R/R0));
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|
|
|
if (gpx->option.ptu && gpx->ptu_out && gpx->option.dbg) {
|
|
printf(" (Rso: %.1f , Rb: %.1f)", Rs_o/1e3, Rb/1e3);
|
|
}
|
|
|
|
return T - 273.15;
|
|
// DFM-06: meas20 * 16 = meas24
|
|
}
|
|
static float get_Temp4(gpx_t *gpx) { // meas[0..4]
|
|
// NTC-Thermistor EPCOS B57540G0502
|
|
// [ T/C , R/R25 , alpha ] :
|
|
// [ -55.0 , 51.991 , 6.4 ]
|
|
// [ -50.0 , 37.989 , 6.2 ]
|
|
// [ -45.0 , 28.07 , 5.9 ]
|
|
// [ -40.0 , 20.96 , 5.7 ]
|
|
// [ -35.0 , 15.809 , 5.5 ]
|
|
// [ -30.0 , 12.037 , 5.4 ]
|
|
// [ -25.0 , 9.2484 , 5.2 ]
|
|
// [ -20.0 , 7.1668 , 5.0 ]
|
|
// [ -15.0 , 5.5993 , 4.9 ]
|
|
// [ -10.0 , 4.4087 , 4.7 ]
|
|
// [ -5.0 , 3.4971 , 4.6 ]
|
|
// [ 0.0 , 2.7936 , 4.4 ]
|
|
// [ 5.0 , 2.2468 , 4.3 ]
|
|
// [ 10.0 , 1.8187 , 4.2 ]
|
|
// [ 15.0 , 1.4813 , 4.0 ]
|
|
// [ 20.0 , 1.2136 , 3.9 ]
|
|
// [ 25.0 , 1.0000 , 3.8 ]
|
|
// [ 30.0 , 0.82845 , 3.7 ]
|
|
// [ 35.0 , 0.68991 , 3.6 ]
|
|
// [ 40.0 , 0.57742 , 3.5 ]
|
|
// -> Steinhart–Hart coefficients (polyfit):
|
|
float p0 = 1.09698417e-03,
|
|
p1 = 2.39564629e-04,
|
|
p2 = 2.48821437e-06,
|
|
p3 = 5.84354921e-08;
|
|
// T/K = 1/( p0 + p1*ln(R) + p2*ln(R)^2 + p3*ln(R)^3 )
|
|
float f = gpx->meas24[0],
|
|
f1 = gpx->meas24[3],
|
|
f2 = gpx->meas24[4];
|
|
if (gpx->ptu_out >= 0xC) {
|
|
f = gpx->meas24[0+1];
|
|
f1 = gpx->meas24[3+2];
|
|
f2 = gpx->meas24[4+2];
|
|
}
|
|
//float *meas = gpx->meas24;
|
|
float Rf = 220e3; // Rf = 220k
|
|
float g = f2/Rf;
|
|
float R = (f-f1) / g; // f,f1,f2 > 0 ?
|
|
float T = 0; // T/Kelvin
|
|
if (R > 0) T = 1/( p0 + p1*log(R) + p2*log(R)*log(R) + p3*log(R)*log(R)*log(R) );
|
|
return T - 273.15; // Celsius
|
|
// DFM-06: meas20 * 16 = meas24
|
|
// -> (meas24[0]-meas24[3])/meas24[4]=(meas20[0]-meas20[3])/meas20[4]
|
|
}
|
|
|
|
|
|
#define SNbit 0x0100
|
|
static int conf_out(gpx_t *gpx, ui8_t *conf_bits, int ec) {
|
|
int ret = 0;
|
|
int val;
|
|
ui8_t conf_id;
|
|
ui8_t hl;
|
|
ui32_t SN6, SN;
|
|
ui8_t dfm6typ;
|
|
ui8_t sn2_ch, sn_ch;
|
|
|
|
|
|
conf_id = bits2val(conf_bits, 4);
|
|
|
|
if (conf_id > 4 && bits2val(conf_bits+8, 4*5) == 0) gpx->snc.nul_ch = bits2val(conf_bits, 8);
|
|
|
|
dfm6typ = ((gpx->snc.nul_ch & 0xF0)==0x50) && (gpx->snc.nul_ch & 0x0F);
|
|
if (dfm6typ) gpx->ptu_out = 6;
|
|
if (dfm6typ && (gpx->sonde_typ & 0xF) > 6)
|
|
{ // reset if 0x5A, 0x5B (DFM-06)
|
|
gpx->sonde_typ = 0;
|
|
gpx->snc.max_ch = conf_id;
|
|
}
|
|
|
|
if (conf_id > 5 && conf_id > gpx->snc.max_ch && ec == 0) { // mind. 6 Kanaele
|
|
if (bits2val(conf_bits+4, 4) == 0xC) { // 0xsCaaaab
|
|
gpx->snc.max_ch = conf_id; // reset?
|
|
}
|
|
/*
|
|
if (bits2val(conf_bits, 8) == 0x70) { // 0x70aaaab
|
|
gpx->snc.max_ch = conf_id; // reset?
|
|
}
|
|
*/
|
|
}
|
|
|
|
// SN: mind. 6 Kanaele
|
|
if (conf_id > 5 && (conf_id == (gpx->snc.nul_ch>>4)+1 || conf_id == gpx->snc.max_ch))
|
|
{
|
|
sn2_ch = bits2val(conf_bits, 8);
|
|
sn_ch = ((sn2_ch>>4) & 0xF); // sn_ch == config_id
|
|
|
|
if ( (gpx->snc.nul_ch & 0x58) == 0x58 ) { // 0x5A, 0x5B
|
|
SN6 = bits2val(conf_bits+4, 4*6); // DFM-06: Kanal 6
|
|
if (SN6 == gpx->SN6 && SN6 != 0) { // nur Nibble-Werte 0..9
|
|
gpx->sonde_typ = SNbit | 6;
|
|
gpx->ptu_out = 6; // <-> DFM-06
|
|
sprintf(gpx->sonde_id, "ID06:%6X", gpx->SN6);
|
|
}
|
|
else { // reset
|
|
gpx->sonde_typ = 0;
|
|
}
|
|
gpx->SN6 = SN6;
|
|
} // SN in last pck/channel, #{pcks} depends on (sensor) config; observed:
|
|
else if ( (sn2_ch & 0xF) == 0xC // 0xsCaaaab, s==sn_ch , s: 0xA=DFM-09 , 0xC=DFM-09P , 0xB=DFM-17 , 0xD=DFM-17P?
|
|
|| (sn2_ch & 0xF) == 0x0 ) // 0xs0aaaab, s==sn_ch , s: 0x7,0x8: pilotsonde PS-15?
|
|
{
|
|
val = bits2val(conf_bits+8, 4*5);
|
|
hl = (val & 0xF);
|
|
if (hl < 2)
|
|
{
|
|
if ( gpx->snc.sn_ch != sn_ch ) { // -> sn_ch > 0
|
|
// reset
|
|
gpx->snc.chXbit = 0;
|
|
gpx->snc.chX[0] = 0;
|
|
gpx->snc.chX[1] = 0;
|
|
}
|
|
gpx->snc.sn_ch = sn_ch;
|
|
gpx->snc.chX[hl] = (val >> 4) & 0xFFFF;
|
|
gpx->snc.chXbit |= 1 << hl;
|
|
if (gpx->snc.chXbit == 3) {
|
|
SN = (gpx->snc.chX[0] << 16) | gpx->snc.chX[1];
|
|
if ( SN == gpx->snc.SN_X || gpx->snc.SN_X == 0 ) {
|
|
|
|
gpx->sonde_typ = SNbit | sn_ch;
|
|
gpx->SN = SN;
|
|
|
|
gpx->ptu_out = 0;
|
|
if (sn_ch == 0xA /*&& (sn2_ch & 0xF) == 0xC*/) gpx->ptu_out = sn_ch; // <+> DFM-09
|
|
if (sn_ch == 0xB /*&& (sn2_ch & 0xF) == 0xC*/) gpx->ptu_out = sn_ch; // <-> DFM-17
|
|
if (sn_ch == 0xC) gpx->ptu_out = sn_ch; // <+> DFM-09P(?)
|
|
if (sn_ch == 0xD) gpx->ptu_out = sn_ch; // <-> DFM-17P?
|
|
// PS-15 ? (sn2_ch & 0xF) == 0x0 : gpx->ptu_out = 0 // <-> PS-15
|
|
|
|
if ( (gpx->sonde_typ & 0xF) == 0xA) {
|
|
sprintf(gpx->sonde_id, "ID09:%6u", gpx->SN);
|
|
}
|
|
else {
|
|
sprintf(gpx->sonde_id, "ID-%1X:%6u", gpx->sonde_typ & 0xF, gpx->SN);
|
|
}
|
|
}
|
|
else { // reset
|
|
gpx->sonde_typ = 0;
|
|
}
|
|
gpx->snc.SN_X = SN;
|
|
gpx->snc.chXbit = 0;
|
|
}
|
|
}
|
|
}
|
|
ret = (gpx->sonde_typ & 0xF);
|
|
}
|
|
|
|
|
|
if (conf_id >= 0 && conf_id <= 4) {
|
|
val = bits2val(conf_bits+4, 4*6);
|
|
gpx->meas24[conf_id] = fl24(val);
|
|
// DFM-09 (STM32): 24bit 0exxxxx
|
|
// DFM-06 (NXP8): 20bit 0exxxx0
|
|
// fl20(bits2val(conf_bits+4, 4*5))
|
|
// = fl20(exxxx)
|
|
// = fl24(exxxx0)/2^4
|
|
// meas20 * 16 = meas24
|
|
}
|
|
if (gpx->ptu_out >= 0xC) { // DFM>=09(P)
|
|
if (conf_id >= 5 && conf_id <= 6) {
|
|
val = bits2val(conf_bits+4, 4*6);
|
|
gpx->meas24[conf_id] = fl24(val);
|
|
}
|
|
}
|
|
|
|
// STM32-status: Bat, MCU-Temp
|
|
if (gpx->ptu_out >= 0xA) { // DFM>=09(P) (STM32)
|
|
ui8_t ofs = 0;
|
|
if (gpx->ptu_out >= 0xC) ofs = 2;
|
|
if (conf_id == 0x5+ofs) { // voltage
|
|
val = bits2val(conf_bits+8, 4*4);
|
|
gpx->status[0] = val/1000.0;
|
|
}
|
|
if (conf_id == 0x6+ofs) { // T-intern (STM32)
|
|
val = bits2val(conf_bits+8, 4*4);
|
|
gpx->status[1] = val/100.0;
|
|
}
|
|
}
|
|
else {
|
|
gpx->status[0] = 0;
|
|
gpx->status[1] = 0;
|
|
}
|
|
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void print_gpx(gpx_t *gpx) {
|
|
int i, j;
|
|
int contgps = 0;
|
|
int output = 0;
|
|
int jsonout = 0;
|
|
int start = 0;
|
|
|
|
if (gpx->frnr > 0) start = 0x1000;
|
|
|
|
output |= start;
|
|
|
|
|
|
for (i = 0; i < 9/*8*/; i++) { // trigger: pck8
|
|
if ( !( (gpx->option.dst || gpx->option.jsn) && gpx->pck[i].ec < 0) )
|
|
{
|
|
if (gpx->pck[8].ts - gpx->pck[i].ts < 6.0) { output |= (1<<i); }
|
|
}
|
|
//if (gpx->option.dst && gpx->pck[i].ec < 0) { output &= ~(1<<i); }
|
|
}
|
|
|
|
jsonout = output;
|
|
|
|
contgps = ((output & 0x11F) == 0x11F); // 0,1,2,3,8
|
|
|
|
if (gpx->option.dst && !contgps) {
|
|
output = 0;
|
|
}
|
|
if (gpx->option.jsn && !contgps) {
|
|
jsonout = 0;
|
|
}
|
|
|
|
if (output & 0xF000) {
|
|
|
|
if (gpx->option.raw == 2) {
|
|
for (i = 0; i < 9; i++) {
|
|
printf(" %s", gpx->dat_str[i]);
|
|
if (gpx->option.ecc) printf(" (%1X) ", gpx->pck[i].ec&0xF);
|
|
}
|
|
for (i = 0; i < 9; i++) {
|
|
for (j = 0; j < 13; j++) gpx->dat_str[i][j] = ' ';
|
|
}
|
|
}
|
|
else {
|
|
if (gpx->option.aut && gpx->option.vbs >= 2) printf("<%c> ", gpx->option.inv?'-':'+');
|
|
printf("[%3d] ", gpx->frnr);
|
|
printf("%4d-%02d-%02d ", gpx->jahr, gpx->monat, gpx->tag);
|
|
printf("%02d:%02d:%04.1f ", gpx->std, gpx->min, gpx->sek);
|
|
if (gpx->option.vbs >= 2 && gpx->option.ecc) printf("(%1X,%1X,%1X) ", gpx->pck[0].ec&0xF, gpx->pck[8].ec&0xF, gpx->pck[1].ec&0xF);
|
|
printf(" ");
|
|
printf(" lat: %.5f ", gpx->lat); if (gpx->option.vbs >= 2 && gpx->option.ecc) printf("(%1X) ", gpx->pck[2].ec&0xF);
|
|
printf(" lon: %.5f ", gpx->lon); if (gpx->option.vbs >= 2 && gpx->option.ecc) printf("(%1X) ", gpx->pck[3].ec&0xF);
|
|
printf(" alt: %.1f ", gpx->alt); if (gpx->option.vbs >= 2 && gpx->option.ecc) printf("(%1X) ", gpx->pck[4].ec&0xF);
|
|
printf(" vH: %5.2f ", gpx->horiV);
|
|
printf(" D: %5.1f ", gpx->dir);
|
|
printf(" vV: %5.2f ", gpx->vertV);
|
|
if (gpx->option.ptu && gpx->ptu_out) {
|
|
float t = get_Temp(gpx);
|
|
if (t > -270.0) printf(" T=%.1fC ", t);
|
|
if (gpx->option.dbg) {
|
|
float t2 = get_Temp2(gpx);
|
|
float t4 = get_Temp4(gpx);
|
|
if (t2 > -270.0) printf(" T2=%.1fC ", t2);
|
|
if (t4 > -270.0) printf(" T4=%.1fC ", t4);
|
|
printf(" f0: %.2f ", gpx->meas24[0]);
|
|
printf(" f1: %.2f ", gpx->meas24[1]);
|
|
printf(" f2: %.2f ", gpx->meas24[2]);
|
|
printf(" f3: %.2f ", gpx->meas24[3]);
|
|
printf(" f4: %.2f ", gpx->meas24[4]);
|
|
if (gpx->ptu_out >= 0xC) {
|
|
printf(" f5: %.2f ", gpx->meas24[5]);
|
|
printf(" f6: %.2f ", gpx->meas24[6]);
|
|
}
|
|
|
|
}
|
|
}
|
|
if (gpx->option.vbs == 3 && gpx->ptu_out >= 0xA) {
|
|
printf(" U: %.2fV ", gpx->status[0]);
|
|
printf(" Ti: %.1fK ", gpx->status[1]);
|
|
}
|
|
if (gpx->option.vbs)
|
|
{
|
|
if (gpx->sonde_typ & SNbit) {
|
|
printf(" (%s) ", gpx->sonde_id);
|
|
gpx->sonde_typ ^= SNbit;
|
|
}
|
|
}
|
|
}
|
|
printf("\n");
|
|
|
|
if (gpx->option.sat) {
|
|
printf(" ");
|
|
printf(" dMSL: %+.2f", gpx->gps.dMSL); // MSL = alt + gps.dMSL
|
|
printf(" sats: %d", gpx->gps.nSV);
|
|
printf(" (");
|
|
for (j = 0; j < 32; j++) { if ((gpx->gps.prn >> j)&1) printf(" %02d", j+1); }
|
|
printf(" )");
|
|
printf("\n");
|
|
}
|
|
|
|
if (gpx->option.jsn && jsonout)
|
|
{
|
|
// JSON Buffer to store sonde ID
|
|
char json_sonde_id[] = "DFM-xxxxxxxx\0\0";
|
|
ui8_t dfm_typ = (gpx->sonde_typ & 0xF);
|
|
switch ( dfm_typ ) {
|
|
case 0: sprintf(json_sonde_id, "DFM-xxxxxxxx"); break; //json_sonde_id[0] = '\0';
|
|
case 6: sprintf(json_sonde_id, "DFM-%6X", gpx->SN6); break; // DFM-06
|
|
case 0xA: sprintf(json_sonde_id, "DFM-%6u", gpx->SN); break; // DFM-09
|
|
// 0x7:PS-15?, 0xB:DFM-17? 0xC:DFM-09P? 0xD:DFM-17P?
|
|
default : sprintf(json_sonde_id, "DFM-%6u", gpx->SN);
|
|
}
|
|
|
|
// Print JSON blob // valid sonde_ID?
|
|
printf("{ \"type\": \"%s\"", "DFM");
|
|
printf(", \"frame\": %d, \"id\": \"%s\", \"datetime\": \"%04d-%02d-%02dT%02d:%02d:%06.3fZ\", \"lat\": %.5f, \"lon\": %.5f, \"alt\": %.5f, \"vel_h\": %.5f, \"heading\": %.5f, \"vel_v\": %.5f",
|
|
gpx->frnr, json_sonde_id, gpx->jahr, gpx->monat, gpx->tag, gpx->std, gpx->min, gpx->sek, gpx->lat, gpx->lon, gpx->alt, gpx->horiV, gpx->dir, gpx->vertV);
|
|
if (gpx->ptu_out >= 0xA && gpx->status[0] > 0) { // DFM>=09(P): Battery (STM32)
|
|
printf(", \"batt\": %.2f", gpx->status[0]);
|
|
}
|
|
if (gpx->ptu_out) { // get temperature
|
|
float t = get_Temp(gpx); // ecc-valid temperature?
|
|
if (t > -270.0) printf(", \"temp\": %.1f", t);
|
|
}
|
|
if (dfm_typ > 0) printf(", \"subtype\": \"0x%1X\"", dfm_typ);
|
|
printf(" }\n");
|
|
printf("\n");
|
|
}
|
|
|
|
}
|
|
|
|
for (i = 0; i < 9; i++) gpx->pck[i].ec = -1;
|
|
}
|
|
|
|
static int print_frame(gpx_t *gpx) {
|
|
int i;
|
|
int nib = 0;
|
|
int frid = -1;
|
|
int ret0, ret1, ret2;
|
|
int ret = 0;
|
|
|
|
hsbit_t hamming_conf[ 7*B]; // 7*8=56
|
|
hsbit_t hamming_dat1[13*B]; // 13*8=104
|
|
hsbit_t hamming_dat2[13*B];
|
|
|
|
ui8_t block_conf[ 7*S]; // 7*4=28
|
|
ui8_t block_dat1[13*S]; // 13*4=52
|
|
ui8_t block_dat2[13*S];
|
|
|
|
deinterleave(gpx->frame+CONF, 7, hamming_conf);
|
|
deinterleave(gpx->frame+DAT1, 13, hamming_dat1);
|
|
deinterleave(gpx->frame+DAT2, 13, hamming_dat2);
|
|
|
|
ret0 = hamming(gpx->option.ecc, hamming_conf, 7, block_conf);
|
|
ret1 = hamming(gpx->option.ecc, hamming_dat1, 13, block_dat1);
|
|
ret2 = hamming(gpx->option.ecc, hamming_dat2, 13, block_dat2);
|
|
ret = ret0 | ret1 | ret2;
|
|
|
|
if (gpx->option.raw == 1) {
|
|
|
|
for (i = 0; i < 7; i++) {
|
|
nib = bits2val(block_conf+S*i, S);
|
|
printf("%01X", nib & 0xFF);
|
|
}
|
|
if (gpx->option.ecc) {
|
|
if (ret0 == 0) printf(" [OK] ");
|
|
else if (ret0 > 0) printf(" [KO] ");
|
|
else printf(" [NO] ");
|
|
}
|
|
printf(" ");
|
|
for (i = 0; i < 13; i++) {
|
|
nib = bits2val(block_dat1+S*i, S);
|
|
printf("%01X", nib & 0xFF);
|
|
}
|
|
if (gpx->option.ecc) {
|
|
if (ret1 == 0) printf(" [OK] ");
|
|
else if (ret1 > 0) printf(" [KO] ");
|
|
else printf(" [NO] ");
|
|
}
|
|
printf(" ");
|
|
for (i = 0; i < 13; i++) {
|
|
nib = bits2val(block_dat2+S*i, S);
|
|
printf("%01X", nib & 0xFF);
|
|
}
|
|
if (gpx->option.ecc) {
|
|
if (ret2 == 0) printf(" [OK] ");
|
|
else if (ret2 > 0) printf(" [KO] ");
|
|
else printf(" [NO] ");
|
|
}
|
|
|
|
if (gpx->option.ecc && gpx->option.vbs) {
|
|
if (gpx->option.vbs > 1) printf(" (%1X,%1X,%1X) ", cnt_biterr(ret0), cnt_biterr(ret1), cnt_biterr(ret2));
|
|
printf(" (%d) ", cnt_biterr(ret0)+cnt_biterr(ret1)+cnt_biterr(ret2));
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
}
|
|
else if (gpx->option.ecc) {
|
|
|
|
if (ret0 == 0 || ret0 > 0 || gpx->option.ecc == 2) {
|
|
conf_out(gpx, block_conf, ret0);
|
|
}
|
|
if (ret1 == 0 || ret1 > 0 || gpx->option.ecc == 2) {
|
|
frid = dat_out(gpx, block_dat1, ret1);
|
|
if (frid == 8) print_gpx(gpx);
|
|
}
|
|
if (ret2 == 0 || ret2 > 0 || gpx->option.ecc == 2) {
|
|
frid = dat_out(gpx, block_dat2, ret2);
|
|
if (frid == 8) print_gpx(gpx);
|
|
}
|
|
|
|
}
|
|
else {
|
|
|
|
conf_out(gpx, block_conf, ret0);
|
|
frid = dat_out(gpx, block_dat1, ret1);
|
|
if (frid == 8) print_gpx(gpx);
|
|
frid = dat_out(gpx, block_dat2, ret2);
|
|
if (frid == 8) print_gpx(gpx);
|
|
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
int option_verbose = 0; // ausfuehrliche Anzeige
|
|
int option_raw = 0; // rohe Frames
|
|
int option_inv = 0; // invertiert Signal
|
|
int option_ecc = 0;
|
|
int option_ptu = 0;
|
|
int option_dist = 0; // continuous pcks 0..8
|
|
int option_auto = 0;
|
|
int option_min = 0;
|
|
int option_iq = 0;
|
|
int option_lp = 0;
|
|
int option_dc = 0;
|
|
int option_bin = 0;
|
|
int option_softin = 0;
|
|
int option_json = 0; // JSON blob output (for auto_rx)
|
|
int option_pcmraw = 0;
|
|
int wavloaded = 0;
|
|
int sel_wavch = 0; // audio channel: left
|
|
int spike = 0;
|
|
|
|
FILE *fp = NULL;
|
|
char *fpname = NULL;
|
|
|
|
int ret = 0;
|
|
int k;
|
|
|
|
hsbit_t hsbit;
|
|
int bitpos = 0;
|
|
int bitQ;
|
|
int pos;
|
|
int frm = 0, nfrms = 8; // nfrms=1,2,4,8
|
|
|
|
int headerlen = 0;
|
|
|
|
int header_found = 0;
|
|
|
|
float thres = 0.65;
|
|
float _mv = 0.0;
|
|
|
|
int symlen = 2;
|
|
int bitofs = 2; // +1 .. +2
|
|
int shift = 0;
|
|
|
|
pcm_t pcm = {0};
|
|
dsp_t dsp = {0};
|
|
|
|
gpx_t gpx = {0};
|
|
|
|
hdb_t hdb = {0};
|
|
ui32_t hdrcnt = 0;
|
|
|
|
|
|
#ifdef CYGWIN
|
|
_setmode(fileno(stdin), _O_BINARY); // _setmode(_fileno(stdin), _O_BINARY);
|
|
#endif
|
|
setbuf(stdout, NULL);
|
|
|
|
|
|
fpname = argv[0];
|
|
++argv;
|
|
while ((*argv) && (!wavloaded)) {
|
|
if ( (strcmp(*argv, "-h") == 0) || (strcmp(*argv, "--help") == 0) ) {
|
|
fprintf(stderr, "%s [options] audio.wav\n", fpname);
|
|
fprintf(stderr, " options:\n");
|
|
fprintf(stderr, " -v, -vv\n");
|
|
fprintf(stderr, " -r, --raw\n");
|
|
fprintf(stderr, " -i, --invert\n");
|
|
fprintf(stderr, " --ecc (Hamming ECC)\n");
|
|
fprintf(stderr, " --ths <x> (peak threshold; default=%.1f)\n", thres);
|
|
fprintf(stderr, " --json (JSON output)\n");
|
|
return 0;
|
|
}
|
|
else if ( (strcmp(*argv, "-v") == 0) || (strcmp(*argv, "--verbose") == 0) ) {
|
|
option_verbose = 1;
|
|
}
|
|
else if ( (strcmp(*argv, "-vv" ) == 0) ) { option_verbose = 2; }
|
|
else if ( (strcmp(*argv, "-vvv") == 0) ) { option_verbose = 3; }
|
|
else if ( (strcmp(*argv, "-r") == 0) || (strcmp(*argv, "--raw") == 0) ) {
|
|
option_raw = 1;
|
|
}
|
|
else if ( (strcmp(*argv, "-R") == 0) || (strcmp(*argv, "--RAW") == 0) ) {
|
|
option_raw = 2;
|
|
}
|
|
else if ( (strcmp(*argv, "-i") == 0) || (strcmp(*argv, "--invert") == 0) ) {
|
|
option_inv = 0x1;
|
|
}
|
|
else if ( (strcmp(*argv, "--ecc" ) == 0) ) { option_ecc = 1; }
|
|
else if ( (strcmp(*argv, "--ecc2") == 0) ) { option_ecc = 2; }
|
|
else if ( (strcmp(*argv, "--ptu") == 0) ) {
|
|
option_ptu = 1;
|
|
//gpx.ptu_out = 1; // force ptu (non PS-15)
|
|
}
|
|
else if ( (strcmp(*argv, "--spike") == 0) ) {
|
|
spike = 1;
|
|
}
|
|
else if (strcmp(*argv, "--auto") == 0) { option_auto = 1; }
|
|
else if (strcmp(*argv, "--bin") == 0) { option_bin = 1; } // bit/byte binary input
|
|
else if (strcmp(*argv, "--softin") == 0) { option_softin = 1; } // float32 soft input
|
|
else if (strcmp(*argv, "--dist") == 0) { option_dist = 1; option_ecc = 1; }
|
|
else if (strcmp(*argv, "--json") == 0) { option_json = 1; option_ecc = 1; }
|
|
else if (strcmp(*argv, "--ch2") == 0) { sel_wavch = 1; } // right channel (default: 0=left)
|
|
else if (strcmp(*argv, "--ths") == 0) {
|
|
++argv;
|
|
if (*argv) {
|
|
thres = atof(*argv);
|
|
}
|
|
else return -1;
|
|
}
|
|
else if ( (strcmp(*argv, "-d") == 0) ) {
|
|
++argv;
|
|
if (*argv) {
|
|
shift = atoi(*argv);
|
|
if (shift > 4) shift = 4;
|
|
if (shift < -4) shift = -4;
|
|
}
|
|
else return -1;
|
|
}
|
|
else if (strcmp(*argv, "--iq0") == 0) { option_iq = 1; } // differential/FM-demod
|
|
else if (strcmp(*argv, "--iq2") == 0) { option_iq = 2; }
|
|
else if (strcmp(*argv, "--iq3") == 0) { option_iq = 3; } // iq2==iq3
|
|
else if (strcmp(*argv, "--IQ") == 0) { // fq baseband -> IF (rotate from and decimate)
|
|
double fq = 0.0; // --IQ <fq> , -0.5 < fq < 0.5
|
|
++argv;
|
|
if (*argv) fq = atof(*argv);
|
|
else return -1;
|
|
if (fq < -0.5) fq = -0.5;
|
|
if (fq > 0.5) fq = 0.5;
|
|
dsp.xlt_fq = -fq; // S(t) -> S(t)*exp(-f*2pi*I*t)
|
|
option_iq = 5;
|
|
}
|
|
else if (strcmp(*argv, "--lp") == 0) { option_lp = 1; } // IQ lowpass
|
|
else if (strcmp(*argv, "--dc") == 0) { option_dc = 1; }
|
|
else if (strcmp(*argv, "--min") == 0) {
|
|
option_min = 1;
|
|
}
|
|
else if (strcmp(*argv, "--dbg") == 0) { gpx.option.dbg = 1; }
|
|
else if (strcmp(*argv, "--sat") == 0) { gpx.option.sat = 1; }
|
|
else if (strcmp(*argv, "-") == 0) {
|
|
int sample_rate = 0, bits_sample = 0, channels = 0;
|
|
++argv;
|
|
if (*argv) sample_rate = atoi(*argv); else return -1;
|
|
++argv;
|
|
if (*argv) bits_sample = atoi(*argv); else return -1;
|
|
channels = 2;
|
|
if (sample_rate < 1 || (bits_sample != 8 && bits_sample != 16 && bits_sample != 32)) {
|
|
fprintf(stderr, "- <sr> <bs>\n");
|
|
return -1;
|
|
}
|
|
pcm.sr = sample_rate;
|
|
pcm.bps = bits_sample;
|
|
pcm.nch = channels;
|
|
option_pcmraw = 1;
|
|
}
|
|
else {
|
|
fp = fopen(*argv, "rb");
|
|
if (fp == NULL) {
|
|
fprintf(stderr, "error: open %s\n", *argv);
|
|
return -1;
|
|
}
|
|
wavloaded = 1;
|
|
}
|
|
++argv;
|
|
}
|
|
if (!wavloaded) fp = stdin;
|
|
|
|
// ecc2-soft_decision accepts also 2-error words,
|
|
// so the probability for 3 errors is high and will
|
|
// produce wrong codewords. hence ecc2 is not recommended
|
|
// for reliable frame decoding.
|
|
//
|
|
if ( option_dist || option_json ) option_ecc = 1;
|
|
|
|
|
|
if (option_ecc)
|
|
{
|
|
ui8_t nib, msg[4], code[8];
|
|
for (nib = 0; nib < 16; nib++) {
|
|
nib4bits(nib, msg);
|
|
gencode(msg, code);
|
|
for (k = 0; k < 8; k++) codewords[nib][k] = code[k];
|
|
}
|
|
}
|
|
|
|
// init gpx
|
|
//strcpy(gpx.frame_bits, dfm_header); //, sizeof(dfm_header);
|
|
for (k = 0; k < strlen(dfm_header); k++) {
|
|
gpx.frame[k].hb = dfm_header[k] & 1;
|
|
gpx.frame[k].sb = 2*gpx.frame[k].hb - 1;
|
|
}
|
|
|
|
for (k = 0; k < 9; k++) gpx.pck[k].ec = -1; // init ecc-status
|
|
|
|
gpx.option.inv = option_inv;
|
|
gpx.option.vbs = option_verbose;
|
|
gpx.option.raw = option_raw;
|
|
gpx.option.ptu = option_ptu;
|
|
gpx.option.ecc = option_ecc;
|
|
gpx.option.aut = option_auto;
|
|
gpx.option.dst = option_dist;
|
|
gpx.option.jsn = option_json;
|
|
|
|
headerlen = strlen(dfm_rawheader);
|
|
|
|
|
|
#ifdef EXT_FSK
|
|
if (!option_bin && !option_softin) {
|
|
option_softin = 1;
|
|
fprintf(stderr, "reading float32 soft symbols\n");
|
|
}
|
|
#endif
|
|
|
|
if (!option_bin && !option_softin) {
|
|
|
|
if (option_iq == 0 && option_pcmraw) {
|
|
fclose(fp);
|
|
fprintf(stderr, "error: raw data not IQ\n");
|
|
return -1;
|
|
}
|
|
if (option_iq) sel_wavch = 0;
|
|
|
|
pcm.sel_ch = sel_wavch;
|
|
if (option_pcmraw == 0) {
|
|
k = read_wav_header(&pcm, fp);
|
|
if ( k < 0 ) {
|
|
fclose(fp);
|
|
fprintf(stderr, "error: wav header\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
// dfm: BT=1?, h=2.4?
|
|
symlen = 2;
|
|
|
|
// init dsp
|
|
//
|
|
dsp.fp = fp;
|
|
dsp.sr = pcm.sr;
|
|
dsp.bps = pcm.bps;
|
|
dsp.nch = pcm.nch;
|
|
dsp.ch = pcm.sel_ch;
|
|
dsp.br = (float)BAUD_RATE;
|
|
dsp.sps = (float)dsp.sr/dsp.br;
|
|
dsp.symlen = symlen;
|
|
dsp.symhd = symlen;
|
|
dsp._spb = dsp.sps*symlen;
|
|
dsp.hdr = dfm_rawheader;
|
|
dsp.hdrlen = strlen(dfm_rawheader);
|
|
dsp.BT = 0.5; // bw/time (ISI) // 0.3..0.5
|
|
dsp.h = 1.8; // 2.4 modulation index abzgl. BT
|
|
dsp.opt_iq = option_iq;
|
|
dsp.opt_lp = option_lp;
|
|
dsp.lpIQ_bw = 12e3; // IF lowpass bandwidth
|
|
dsp.lpFM_bw = 4e3; // FM audio lowpass
|
|
dsp.opt_dc = option_dc;
|
|
dsp.opt_IFmin = option_min;
|
|
|
|
if ( dsp.sps < 8 ) {
|
|
fprintf(stderr, "note: sample rate low\n");
|
|
}
|
|
|
|
|
|
k = init_buffers(&dsp);
|
|
if ( k < 0 ) {
|
|
fprintf(stderr, "error: init buffers\n");
|
|
return -1;
|
|
}
|
|
|
|
bitofs += shift;
|
|
}
|
|
else {
|
|
if (option_bin && option_softin) option_bin = 0;
|
|
// init circular header bit buffer
|
|
hdb.hdr = dfm_rawheader;
|
|
hdb.len = strlen(dfm_rawheader);
|
|
hdb.thb = 1.0 - 2.1/(float)hdb.len; // 1.0-max_bit_errors/hdrlen // max 1.1 !!
|
|
hdb.bufpos = -1;
|
|
hdb.buf = calloc(hdb.len, sizeof(char));
|
|
if (hdb.buf == NULL) {
|
|
fprintf(stderr, "error: malloc\n");
|
|
return -1;
|
|
}
|
|
hdb.ths = 0.7; // caution/test false positive
|
|
hdb.sbuf = calloc(hdb.len, sizeof(float));
|
|
if (hdb.sbuf == NULL) {
|
|
fprintf(stderr, "error: malloc\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
|
|
while ( 1 )
|
|
{
|
|
if (option_bin) { // aka find_binrawhead()
|
|
header_found = find_binhead(fp, &hdb, &_mv); // symbols or bits?
|
|
hdrcnt += nfrms;
|
|
}
|
|
else if (option_softin) {
|
|
header_found = find_softbinhead(fp, &hdb, &_mv);
|
|
hdrcnt += nfrms;
|
|
}
|
|
else { //2 (false positive) // FM-audio:
|
|
header_found = find_header(&dsp, thres, 2, bitofs, dsp.opt_dc); // optional 2nd pass: dc=0
|
|
_mv = dsp.mv;
|
|
}
|
|
if (header_found == EOF) break;
|
|
|
|
// mv == correlation score
|
|
if (_mv *(0.5-gpx.option.inv) < 0) {
|
|
if (gpx.option.aut == 0) header_found = 0;
|
|
else gpx.option.inv ^= 0x1;
|
|
}
|
|
|
|
if (header_found)
|
|
{
|
|
bitpos = 0;
|
|
pos = headerlen;
|
|
pos /= 2;
|
|
|
|
//if (fabs(mv) > 0.85) nfrms = 8; else nfrms = 4; // test OK/KO/NO count
|
|
|
|
frm = 0;
|
|
while ( frm < nfrms ) { // nfrms=1,2,4,8
|
|
if (option_bin || option_softin) {
|
|
gpx._frmcnt = hdrcnt + frm;
|
|
}
|
|
else {
|
|
gpx._frmcnt = dsp.mv_pos/(2.0*dsp.sps*BITFRAME_LEN) + frm;
|
|
}
|
|
while ( pos < BITFRAME_LEN )
|
|
{
|
|
if (option_bin) {
|
|
// symbols or bits?
|
|
// manchester1 1->10,0->01: 1.bit (DFM-06)
|
|
// manchester2 0->10,1->01: 2.bit (DFM-09)
|
|
bitQ = fgetc(fp);
|
|
if (bitQ != EOF) {
|
|
hsbit.hb = bitQ & 0x1;
|
|
bitQ = fgetc(fp); // check: rbit0^rbit1=1 (Manchester)
|
|
if (bitQ != EOF) hsbit.hb = bitQ & 0x1; // 2.bit (DFM-09)
|
|
hsbit.sb = 2*hsbit.hb - 1;
|
|
}
|
|
}
|
|
else if (option_softin) {
|
|
float s1 = 0.0;
|
|
float s2 = 0.0;
|
|
float s = 0.0;
|
|
bitQ = f32soft_read(fp, &s1);
|
|
if (bitQ != EOF) {
|
|
bitQ = f32soft_read(fp, &s2);
|
|
if (bitQ != EOF) {
|
|
s = s2-s1; // integrate both symbols // only 2nd Manchester symbol: s2
|
|
hsbit.sb = s;
|
|
hsbit.hb = (s>=0.0);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
float bl = -1;
|
|
if (option_iq >= 2) spike = 0;
|
|
if (option_iq > 2) bl = 4.0;
|
|
bitQ = read_softbit(&dsp, &hsbit, 0, bitofs, bitpos, bl, spike); // symlen=2
|
|
// optional:
|
|
// normalize soft bit s_j by
|
|
// rhsbit.sb /= dsp._spb+1; // all samples in [-1,+1]
|
|
}
|
|
if ( bitQ == EOF ) { frm = nfrms; break; } // liest 2x EOF
|
|
|
|
if (gpx.option.inv) {
|
|
hsbit.hb ^= 1;
|
|
hsbit.sb = -hsbit.sb;
|
|
}
|
|
|
|
gpx.frame[pos] = hsbit;
|
|
pos++;
|
|
bitpos += 1;
|
|
}
|
|
|
|
ret = print_frame(&gpx);
|
|
if (pos < BITFRAME_LEN) break;
|
|
pos = 0;
|
|
frm += 1;
|
|
//if (ret < 0) frms += 1;
|
|
}
|
|
}
|
|
|
|
header_found = 0;
|
|
pos = headerlen;
|
|
}
|
|
|
|
|
|
if (!option_bin && !option_softin) free_buffers(&dsp);
|
|
else {
|
|
if (hdb.buf) { free(hdb.buf); hdb.buf = NULL; }
|
|
}
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
|