kopia lustrzana https://github.com/rs1729/RS
828 wiersze
30 KiB
C
828 wiersze
30 KiB
C
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/*
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* Meisei iMS-100
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*
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* sync header: correlation/matched filter
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* files: meisei100mod.c demod_mod.c demod_mod.h bch_ecc_mod.c bch_ecc_mod.h
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* compile, either (a) or (b):
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* (a)
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* gcc -c demod_mod.c
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* gcc -DINCLUDESTATIC meisei100mod.c demod_mod.o -lm -o meisei100mod
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* (b)
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* gcc -c demod_mod.c
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* gcc -c bch_ecc_mod.c
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* gcc meisei100mod.c demod_mod.o bch_ecc_mod.o -lm -o meisei100mod
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*
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* usage:
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* ./meisei100mod --ecc -v <audio.wav>
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*
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* author: zilog80
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*/
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/*
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PCM-FM, 1200 baud biphase-S
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1200 bit pro Sekunde: zwei Frames, die wiederum in zwei Subframes unterteilt werden koennen, d.h. 4 mal 300 bit.
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Variante 1 (RS-11G ?)
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<option -1>
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049DCE1C667FDD8F537C8100004F20764630A20000000010040436 FB623080801F395FFE08A76540000FE01D0C2C1E75025006DE0A07
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049DCE1C67008C73D7168200004F0F764B31A2FFFF000010270B14 FB6230000000000000000000000000000000000000000000001D59
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0x00..0x02 HEADER 0x049DCE
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0x03..0x04 16 bit 0.5s-counter, count%2=0:
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0x1B..0x1D HEADER 0xFB6230
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0x20..0x23 32 bit GPS-lat * 1e7 (DD.dddddd)
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0x24..0x27 32 bit GPS-lon * 1e7 (DD.dddddd)
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0x28..0x2B 32 bit GPS-alt * 1e2 (m)
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0x2C..0x2D 16 bit GPS-vH * 1e2 (m/s)
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0x2E..0x2F 16 bit GPS-vD * 1e2 (degree) (0..360 unsigned)
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0x30..0x31 16 bit GPS-vU * 1e2 (m/s)
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0x32..0x35 32 bit date jjJJMMTT
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0x00..0x02 HEADER 0x049DCE
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0x03..0x04 16 bit 0.5s-counter, count%2=1:
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0x17..0x18 16 bit time ms xxyy, 00.000-59.000
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0x19..0x1A 16 bit time hh:mm
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0x1B..0x1D HEADER 0xFB6230
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0x049DCE ^ 0xFB6230 = 0xFFFFFE
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Variante 2 (iMS-100 ?)
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<option -2>
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049DCE3E228023DBF53FA700003C74628430C100000000ABE00B3B FB62302390031EECCC00E656E42327562B2436C4C01CDB0F18B09A
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049DCE3E23516AF62B3FC700003C7390D131C100000000AB090000 FB62300000000000032423222422202014211B13220000000067C4
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0x00..0x02 HEADER 0x049DCE
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0x03..0x04 16 bit 0.5s-counter, count%2=0:
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0x07..0x0A 32 bit cfg[cnt%64] (float32); cfg[0,16,32,48]=SN
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0x11..0x12 30xx, xx=C1(ims100?),A2(rs11?)
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0x17..0x18 16 bit time ms yyxx, 00.000-59.000
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0x19..0x1A 16 bit time hh:mm
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0x1B..0x1D HEADER 0xFB6230
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0x1E..0x1F 16 bit ? date (TT,MM,JJ)=(date/1000,(date/10)%100,(date%10)+10)
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0x20..0x23 32 bit GPS-lat * 1e4 (NMEA DDMM.mmmm)
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0x24..0x27 32 bit GPS-lon * 1e4 (NMEA DDMM.mmmm)
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0x28..0x2A 24 bit GPS-alt * 1e2 (m)
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0x30..0x31 16 bit GPS-vD * 1e2 (degree)
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0x32..0x33 16 bit GPS-vH * 1.944e2 (knots)
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0x00..0x02 HEADER 0x049DCE
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0x03..0x04 16 bit 0.5s-counter, count%2=1:
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0x07..0x0A 32 bit cfg[cnt%64] (float32); freq=400e3+cfg[15]*1e2/kHz
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0x11..0x12 31xx, xx=C1(ims100?),A2(rs11?)
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0x17..0x18 16 bit 1024-counter yyxx, +0x400=1024; rollover synchron zu ms-counter, nach rollover auch +0x300=768
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0x1B..0x1D HEADER 0xFB6230
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0x22..0x23 yy00..yy03 (yy00: GPS PRN?)
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Die 46bit-Bloecke sind BCH-Codewoerter. Es handelt sich um einen (63,51)-Code mit Generatorpolynom
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x^12+x^10+x^8+x^5+x^4+x^3+1;
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gekuerzt auf (46,34), die letzten 12 bit sind die BCH-Kontrollbits.
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Die 34 Nachrichtenbits sind aufgeteilt in 16+1+16+1, d.h. nach einem 16 bit Block kommt ein Paritaetsbit,
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dass 1 ist, wenn die Anzahl 1en in den 16 bit davor gerade ist, und sonst 0.
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*/
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/*
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2 "raw" symbols -> 1 biphase-symbol (bit): 2400 (raw) baud
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ecc: option_b, exact symbol rate; if necessary, adjust --br <baud>
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e.g. -b --br 2398
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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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/*
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typedef unsigned char ui8_t;
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typedef unsigned short ui16_t;
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typedef unsigned int ui32_t;
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typedef short i16_t;
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*/
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#include "demod_mod.h"
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//#define INCLUDESTATIC 1
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#ifdef INCLUDESTATIC
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#include "bch_ecc_mod.c"
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#else
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#include "bch_ecc_mod.h"
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#endif
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#define BITFRAME_LEN 1200
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#define RAWBITFRAME_LEN (BITFRAME_LEN*2)
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typedef struct {
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int frnr;
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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 vH; double vD; double vV;
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char frame_rawbits[RAWBITFRAME_LEN+10];
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ui8_t frame_bits[BITFRAME_LEN+10];
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ui32_t ecc;
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float cfg[64];
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ui32_t _sn;
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float sn; // 0 mod 16
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float fq; // 15 mod 64
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RS_t RS;
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} gpx_t;
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/* -------------------------------------------------------------------------- */
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#define BAUD_RATE 2400 // raw symbol rate; bit=biphase_symbol, bitrate=1200
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#define HEADLEN 24
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#define RAWHEADLEN (2*HEADLEN)
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static char header0x049DCE[] = // 0x049DCE =
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"101010101011010100101011001101001100101011001101"; // 00000100 10011101 11001110
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static char header0x049DCEbits[] = "000001001001110111001110";
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//111110110110001000110000
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static char header0xFB6230[] = // 0xFB6230 =
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"110011001101001101001101010100101010110010101010"; // 11111011 01100010 00110000
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static char header0xFB6230bits[] = "111110110110001000110000";
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// 0x049DCE ^ 0xFB6230 = 0xFFFFFE
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static char *rawheader = header0x049DCE;
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/* -------------------------------------------------------------------------- */
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static int biphi_s(char* frame_rawbits, ui8_t *frame_bits) {
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int j = 0;
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int byt;
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j = 0;
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while ((byt = frame_rawbits[2*j]) && frame_rawbits[2*j+1]) {
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if ((byt < 0x30) || (byt > 0x31)) break;
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if ( frame_rawbits[2*j] == frame_rawbits[2*j+1] ) { byt = 1; }
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else { byt = 0; }
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frame_bits[j] = byt;
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j++;
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}
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frame_bits[j] = 0;
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return j;
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}
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/* -------------------------------------------------------------------------- */
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static ui32_t bits2val(ui8_t bits[], int len) {
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int j;
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ui8_t bit;
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ui32_t val;
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if ((len < 0) || (len > 32)) return -1;
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val = 0;
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for (j = 0; j < len; j++) {
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bit = bits[j];
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val |= (bit << (len-1-j)); // big endian
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//val |= (bit << j); // little endian
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}
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return val;
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}
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static int get_w16(ui8_t *subframe_bits, int j) {
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if (j < 0 || j > 11) return -1;
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return bits2val(subframe_bits+HEADLEN+46*(j/2)+17*(j%2), 16);
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}
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/* -------------------------------------------------------------------------- */
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int main(int argc, char **argv) {
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int option_verbose = 0,
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option_raw = 0,
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option_inv = 0,
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option_ecc = 0, // BCH(63,51)
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option_jsn = 0; // JSON output (auto_rx)
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int option_min = 0;
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int option_iq = 0;
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int option_lp = 0;
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int option_dc = 0;
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int option_softin = 0;
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int option_pcmraw = 0;
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int sel_wavch = 0;
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int wavloaded = 0;
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int option1 = 0,
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option2 = 0;
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float baudrate = -1;
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FILE *fp;
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char *fpname;
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int subframe = 0;
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int err_frm = 0;
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int gps_chk_sum = 0;
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int gps_err = 0;
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ui8_t block_err[6];
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int block;
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ui8_t *subframe_bits;
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int counter;
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ui32_t val;
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ui32_t dat2;
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int lat, lat1, lat2,
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lon, lon1, lon2,
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alt, alt1, alt2;
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ui16_t vH, vD;
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i16_t vU;
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double velH, velD, velU;
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int latdeg,londeg;
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double latmin, lonmin;
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ui32_t t1, t2, ms, min, std, tt, mm, jj;
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float sn = -1;
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float freq = -1;
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int k, j;
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int bitpos = 0, bit;
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int bitQ;
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int header_found = 0;
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float thres = 0.7;
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float _mv = 0.0;
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int symlen = 1;
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int bitofs = 0; // 0..+1
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int shift = 0;
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pcm_t pcm = {0};
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dsp_t dsp = {0}; //memset(&dsp, 0, sizeof(dsp));
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hdb_t hdb = {0};
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gpx_t gpx = {0};
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#ifdef CYGWIN
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_setmode(fileno(stdin), _O_BINARY); // _setmode(_fileno(stdin), _O_BINARY);
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#endif
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setbuf(stdout, NULL);
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fpname = argv[0];
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++argv;
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while ((*argv) && (!wavloaded)) {
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if ( (strcmp(*argv, "-h") == 0) || (strcmp(*argv, "--help") == 0) ) {
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help_out:
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fprintf(stderr, "%s <-n> [options] audio.wav\n", fpname);
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fprintf(stderr, " n=1,2\n");
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fprintf(stderr, " options:\n");
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//fprintf(stderr, " -v, --verbose\n");
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fprintf(stderr, " -r, --raw\n");
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return 0;
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}
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else if ( (strcmp(*argv, "-r") == 0) ) { option_raw = 1; }
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else if ( (strcmp(*argv, "-i") == 0) || (strcmp(*argv, "--invert") == 0) ) {
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option_inv = 1; // nicht noetig
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}
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else if ( (strcmp(*argv, "-2") == 0) ) {
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option2 = 1;
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}
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else if ( (strcmp(*argv, "-1") == 0) ) {
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option1 = 1;
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}
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else if (strcmp(*argv, "--ecc") == 0) { option_ecc = 1; }
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else if ( (strcmp(*argv, "-v") == 0) ) { option_verbose = 1; }
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else if ( (strcmp(*argv, "--br") == 0) ) {
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++argv;
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if (*argv) {
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baudrate = atof(*argv);
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if (baudrate < 2200 || baudrate > 2400) baudrate = 2400; // default: 2400
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}
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else return -1;
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}
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else if (strcmp(*argv, "--ch2") == 0) { sel_wavch = 1; } // right channel (default: 0=left)
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else if (strcmp(*argv, "--softin") == 0) { option_softin = 1; } // float32 soft input
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else if (strcmp(*argv, "--ths") == 0) {
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++argv;
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if (*argv) {
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thres = atof(*argv);
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}
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else return -1;
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}
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else if ( (strcmp(*argv, "-d") == 0) ) {
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++argv;
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if (*argv) {
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shift = atoi(*argv);
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if (shift > 4) shift = 4;
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if (shift < -4) shift = -4;
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}
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else return -1;
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}
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else if (strcmp(*argv, "--iq0") == 0) { option_iq = 1; } // differential/FM-demod
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else if (strcmp(*argv, "--iq2") == 0) { option_iq = 2; }
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else if (strcmp(*argv, "--iq3") == 0) { option_iq = 3; } // iq2==iq3
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else if (strcmp(*argv, "--IQ") == 0) { // fq baseband -> IF (rotate from and decimate)
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double fq = 0.0; // --IQ <fq> , -0.5 < fq < 0.5
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++argv;
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if (*argv) fq = atof(*argv);
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else return -1;
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if (fq < -0.5) fq = -0.5;
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if (fq > 0.5) fq = 0.5;
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dsp.xlt_fq = -fq; // S(t) -> S(t)*exp(-f*2pi*I*t)
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option_iq = 5;
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}
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else if (strcmp(*argv, "--lp") == 0) { option_lp = 1; } // IQ lowpass
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else if ( (strcmp(*argv, "--dc") == 0) ) { option_dc = 1; }
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else if (strcmp(*argv, "--min") == 0) {
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option_min = 1;
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}
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else if (strcmp(*argv, "--json") == 0) {
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option_jsn = 1;
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option_ecc = 1;
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}
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else if (strcmp(*argv, "-") == 0) {
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int sample_rate = 0, bits_sample = 0, channels = 0;
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++argv;
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if (*argv) sample_rate = atoi(*argv); else return -1;
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++argv;
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if (*argv) bits_sample = atoi(*argv); else return -1;
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channels = 2;
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if (sample_rate < 1 || (bits_sample != 8 && bits_sample != 16 && bits_sample != 32)) {
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fprintf(stderr, "- <sr> <bs>\n");
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return -1;
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}
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pcm.sr = sample_rate;
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pcm.bps = bits_sample;
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pcm.nch = channels;
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option_pcmraw = 1;
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}
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else {
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if (option1 == 1 && option2 == 1) goto help_out;
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if (!option_raw && option1 == 0 && option2 == 0) option2 = 1;
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fp = fopen(*argv, "rb");
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if (fp == NULL) {
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fprintf(stderr, "error: open %s\n", *argv);
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return -1;
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}
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wavloaded = 1;
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}
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++argv;
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}
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if (!wavloaded) fp = stdin;
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#ifdef EXT_FSK
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if (!option_softin) {
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option_softin = 1;
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fprintf(stderr, "reading float32 soft symbols\n");
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}
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#endif
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if (!option_softin) {
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if (option_iq == 0 && option_pcmraw) {
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fclose(fp);
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fprintf(stderr, "error: raw data not IQ\n");
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return -1;
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}
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if (option_iq) sel_wavch = 0;
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pcm.sel_ch = sel_wavch;
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if (option_pcmraw == 0) {
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k = read_wav_header(&pcm, fp);
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if ( k < 0 ) {
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fclose(fp);
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fprintf(stderr, "error: wav header\n");
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return -1;
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}
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}
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symlen = 1;
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// init dsp
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//
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dsp.fp = fp;
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dsp.sr = pcm.sr;
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dsp.bps = pcm.bps;
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dsp.nch = pcm.nch;
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dsp.ch = pcm.sel_ch;
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dsp.br = (float)BAUD_RATE;
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dsp.sps = (float)dsp.sr/dsp.br;
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dsp.symlen = symlen;
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dsp.symhd = 1;
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dsp._spb = dsp.sps*symlen;
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dsp.hdr = rawheader;
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dsp.hdrlen = strlen(rawheader);
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dsp.BT = 1.2; // bw/time (ISI) // 1.0..2.0
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dsp.h = 2.4; // 2.8
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dsp.opt_iq = option_iq;
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dsp.opt_lp = option_lp;
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dsp.lpIQ_bw = 16e3; // IF lowpass bandwidth
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dsp.lpFM_bw = 4e3; // FM audio lowpass
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dsp.opt_dc = option_dc;
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dsp.opt_IFmin = option_min;
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if ( dsp.sps < 8 ) {
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fprintf(stderr, "note: sample rate low (%.1f sps)\n", dsp.sps);
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}
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if (baudrate > 0) {
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dsp.br = (float)baudrate;
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dsp.sps = (float)dsp.sr/dsp.br;
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fprintf(stderr, "sps corr: %.4f\n", dsp.sps);
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}
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k = init_buffers(&dsp);
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if ( k < 0 ) {
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fprintf(stderr, "error: init buffers\n");
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return -1;
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}
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bitofs += shift;
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}
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else {
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// init circular header bit buffer
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hdb.hdr = rawheader;
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hdb.len = strlen(rawheader);
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//hdb.thb = 1.0 - 3.1/(float)hdb.len; // 1.0-max_bit_errors/hdrlen
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hdb.bufpos = -1;
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hdb.buf = NULL;
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/*
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calloc(hdb.len, sizeof(char));
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|
if (hdb.buf == NULL) {
|
|
fprintf(stderr, "error: malloc\n");
|
|
return -1;
|
|
}
|
|
*/
|
|
hdb.ths = 0.8; // caution/test false positive
|
|
hdb.sbuf = calloc(hdb.len, sizeof(float));
|
|
if (hdb.sbuf == NULL) {
|
|
fprintf(stderr, "error: malloc\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
|
|
if (option_ecc) {
|
|
rs_init_BCH64(&gpx.RS);
|
|
}
|
|
|
|
gpx.sn = -1;
|
|
|
|
|
|
while ( 1 )
|
|
{
|
|
if (option_softin) {
|
|
header_found = find_softbinhead(fp, &hdb, &_mv);
|
|
}
|
|
else { // FM-audio:
|
|
header_found = find_header(&dsp, thres, 1, bitofs, dsp.opt_dc); // optional 2nd pass: dc=0
|
|
_mv = dsp.mv;
|
|
}
|
|
|
|
if (header_found == EOF) break;
|
|
|
|
if (header_found) {
|
|
|
|
bitpos = 0;
|
|
for (j = 0; j < HEADLEN; j++) {
|
|
gpx.frame_bits[j] = header0x049DCEbits[j] - 0x30;
|
|
}
|
|
|
|
|
|
while (bitpos < RAWBITFRAME_LEN/2-RAWHEADLEN) { // 2*600-48
|
|
if (option_softin) {
|
|
float s = 0.0;
|
|
bitQ = f32soft_read(fp, &s);
|
|
if (bitQ != EOF) bit = (s>=0.0); // no soft decoding
|
|
}
|
|
else {
|
|
bitQ = read_slbit(&dsp, &bit, 0, bitofs, bitpos, -1, 0); // symlen=1
|
|
}
|
|
if (bitQ == EOF) { break; }
|
|
|
|
gpx.frame_rawbits[bitpos] = 0x30 + bit;
|
|
bitpos++;
|
|
}
|
|
|
|
if (bitpos >= RAWBITFRAME_LEN/2-RAWHEADLEN) { // 2*600-48
|
|
gpx.frame_rawbits[bitpos] = '\0';
|
|
|
|
biphi_s(gpx.frame_rawbits, gpx.frame_bits+HEADLEN);
|
|
|
|
gps_chk_sum = 0;
|
|
gps_err = 0;
|
|
err_frm = 0;
|
|
|
|
for (subframe = 0; subframe < 2; subframe++)
|
|
{ // option2:
|
|
subframe_bits = gpx.frame_bits; // subframe 0: 049DCE
|
|
if (subframe > 0) subframe_bits += BITFRAME_LEN/4; // subframe 1: FB6230
|
|
|
|
if (option_ecc) {
|
|
int errors;
|
|
ui8_t cw[63+1], // BCH(63,51), t=2
|
|
err_pos[4],
|
|
err_val[4];
|
|
int check_err;
|
|
|
|
for (block = 0; block < 6; block++) {
|
|
|
|
// prepare block-codeword
|
|
for (j = 0; j < 46; j++) cw[45-j] = subframe_bits[HEADLEN + block*46+j];
|
|
for (j = 46; j < 63; j++) cw[j] = 0;
|
|
|
|
errors = rs_decode_bch_gf2t2(&gpx.RS, cw, err_pos, err_val);
|
|
|
|
// check parity,padding
|
|
if (errors >= 0) {
|
|
int par = 0;
|
|
check_err = 0;
|
|
for (j = 46; j < 63; j++) { if (cw[j] != 0) check_err = 0x1; }
|
|
par = 1;
|
|
for (j = 13; j < 13+16; j++) par ^= cw[j];
|
|
if (cw[12] != par) check_err |= 0x100;
|
|
par = 1;
|
|
for (j = 30; j < 30+16; j++) par ^= cw[j];
|
|
if (cw[29] != par) check_err |= 0x10;
|
|
if (check_err) errors = -3;
|
|
}
|
|
if (errors >= 0) // errors > 0
|
|
{
|
|
for (j = 0; j < 46; j++) subframe_bits[HEADLEN + block*46+j] = cw[45-j];
|
|
}
|
|
|
|
if (errors < 0) {
|
|
if (errors == -3) block_err[block] = 0xF;
|
|
else block_err[block] = 0xE;
|
|
err_frm += 1;
|
|
}
|
|
else block_err[block] = errors;
|
|
|
|
}
|
|
}
|
|
|
|
if (!option2 && !option_raw) {
|
|
jmpRS11:
|
|
if (header_found % 2 == 1)
|
|
{
|
|
val = bits2val(subframe_bits+HEADLEN, 16);
|
|
counter = val & 0xFFFF;
|
|
printf("[%d] ", counter);
|
|
|
|
// 0x30yy, 0x31yy
|
|
val = bits2val(subframe_bits+HEADLEN+46*3+17, 16);
|
|
if ( (val & 0xFF) >= 0xC0 && err_frm == 0) {
|
|
option2 = 1;
|
|
printf("\n");
|
|
goto jmpIMS;
|
|
}
|
|
|
|
if (counter % 2 == 1) {
|
|
t2 = bits2val(subframe_bits+HEADLEN+5*46 , 8); // LSB
|
|
t1 = bits2val(subframe_bits+HEADLEN+5*46+8, 8);
|
|
ms = (t1 << 8) | t2;
|
|
std = bits2val(subframe_bits+HEADLEN+5*46+17, 8);
|
|
min = bits2val(subframe_bits+HEADLEN+5*46+25, 8);
|
|
printf(" ");
|
|
printf("%02d:%02d:%06.3f ", std, min, (double)ms/1000.0);
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
if (header_found % 2 == 0)
|
|
{
|
|
if ((counter % 2 == 0)) {
|
|
//offset=24+16+1;
|
|
|
|
lat1 = bits2val(subframe_bits+HEADLEN+46*0+17, 16);
|
|
lat2 = bits2val(subframe_bits+HEADLEN+46*1 , 16);
|
|
lon1 = bits2val(subframe_bits+HEADLEN+46*1+17, 16);
|
|
lon2 = bits2val(subframe_bits+HEADLEN+46*2 , 16);
|
|
alt1 = bits2val(subframe_bits+HEADLEN+46*2+17, 16);
|
|
alt2 = bits2val(subframe_bits+HEADLEN+46*3 , 16);
|
|
|
|
lat = (lat1 << 16) | lat2;
|
|
lon = (lon1 << 16) | lon2;
|
|
alt = (alt1 << 16) | alt2;
|
|
//printf("%08X %08X %08X : ", lat, lon, alt);
|
|
printf(" ");
|
|
printf("lat: %.5f lon: %.5f alt: %.2f", (double)lat/1e7, (double)lon/1e7, (double)alt/1e2);
|
|
printf(" ");
|
|
|
|
vH = bits2val(subframe_bits+HEADLEN+46*3+17, 16);
|
|
vD = bits2val(subframe_bits+HEADLEN+46*4 , 16);
|
|
vU = bits2val(subframe_bits+HEADLEN+46*4+17, 16);
|
|
velH = (double)vH/1e2;
|
|
velD = (double)vD/1e2;
|
|
velU = (double)vU/1e2;
|
|
printf(" vH: %.2fm/s D: %.1f vV: %.2fm/s", velH, velD, velU);
|
|
printf(" ");
|
|
|
|
jj = bits2val(subframe_bits+HEADLEN+5*46+ 8, 8) + 0x0700;
|
|
mm = bits2val(subframe_bits+HEADLEN+5*46+17, 8);
|
|
tt = bits2val(subframe_bits+HEADLEN+5*46+25, 8);
|
|
printf(" %4d-%02d-%02d ", jj, mm, tt);
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
}
|
|
else if (option2 && !option_raw) { // iMS-100
|
|
jmpIMS:
|
|
if (header_found % 2 == 1) { // 049DCE
|
|
ui16_t w16[2];
|
|
ui32_t w32;
|
|
float *fcfg = (float *)&w32;
|
|
|
|
// 1st subframe
|
|
for (j = 10; j < 12; j++) gps_chk_sum += get_w16(subframe_bits, j);
|
|
|
|
// 0x30C1, 0x31C1
|
|
val = bits2val(subframe_bits+HEADLEN+46*3+17, 16);
|
|
if ( (val & 0xFF) < 0xC0 && err_frm == 0) {
|
|
option2 = 0;
|
|
printf("\n");
|
|
goto jmpRS11;
|
|
}
|
|
|
|
val = bits2val(subframe_bits+HEADLEN, 16);
|
|
counter = val & 0xFFFF;
|
|
|
|
if (counter % 2 == 0) printf("[%d] ", counter);
|
|
|
|
w16[0] = bits2val(subframe_bits+HEADLEN+46*1 , 16);
|
|
w16[1] = bits2val(subframe_bits+HEADLEN+46*1+17, 16);
|
|
w32 = (w16[1]<<16) | w16[0];
|
|
|
|
if (err_frm == 0) // oder kleineren subblock pruefen
|
|
{
|
|
gpx.cfg[counter%64] = *fcfg;
|
|
|
|
// (main?) SN
|
|
if (counter % 0x10 == 0) { sn = *fcfg; gpx.sn = sn; gpx._sn = w32; }
|
|
// freq
|
|
if (counter % 64 == 15) { freq = 400e3+(*fcfg)*100.0; gpx.fq = freq; }
|
|
}
|
|
|
|
if (counter % 2 == 0) {
|
|
gpx.frnr = counter;
|
|
t1 = bits2val(subframe_bits+HEADLEN+5*46 , 8); // MSB
|
|
t2 = bits2val(subframe_bits+HEADLEN+5*46+8, 8);
|
|
ms = (t1 << 8) | t2;
|
|
std = bits2val(subframe_bits+HEADLEN+5*46+17, 8);
|
|
min = bits2val(subframe_bits+HEADLEN+5*46+25, 8);
|
|
gpx.sek = (float)ms/1000.0;
|
|
gpx.std = std;
|
|
gpx.min = min;
|
|
printf(" ");
|
|
printf("%02d:%02d:%06.3f ", gpx.std, gpx.min, gpx.sek);
|
|
printf(" ");
|
|
}
|
|
}
|
|
|
|
if (header_found % 2 == 0) // FB6230
|
|
{
|
|
// 2nd subframe
|
|
for (j = 0; j < 11; j++) gps_chk_sum += get_w16(subframe_bits, j);
|
|
gps_err = (gps_chk_sum & 0xFFFF) != get_w16(subframe_bits, 11); // 1st+2nd subframe
|
|
|
|
if ((counter % 2 == 0)) {
|
|
//offset=24+16+1;
|
|
|
|
dat2 = bits2val(subframe_bits+HEADLEN, 16);
|
|
gpx.tag = dat2/1000;
|
|
gpx.monat = (dat2/10)%100;
|
|
gpx.jahr = 2000 + (dat2%10)+10;
|
|
//if (option_verbose) printf("%05u ", dat2);
|
|
//printf("(%02d-%02d-%02d) ", gpx.tag, gpx.monat, gpx.jahr%100); // 2020: +20 ?
|
|
printf("(%04d-%02d-%02d) ", gpx.jahr, gpx.monat, gpx.tag); // 2020: +20 ?
|
|
|
|
lat1 = bits2val(subframe_bits+HEADLEN+46*0+17, 16);
|
|
lat2 = bits2val(subframe_bits+HEADLEN+46*1 , 16);
|
|
lon1 = bits2val(subframe_bits+HEADLEN+46*1+17, 16);
|
|
lon2 = bits2val(subframe_bits+HEADLEN+46*2 , 16);
|
|
alt1 = bits2val(subframe_bits+HEADLEN+46*2+17, 16);
|
|
alt2 = bits2val(subframe_bits+HEADLEN+46*3 , 8);
|
|
|
|
// NMEA?
|
|
lat = (lat1 << 16) | lat2;
|
|
lon = (lon1 << 16) | lon2;
|
|
alt = (alt1 << 8) | alt2;
|
|
latdeg = (int)lat / 1e6;
|
|
latmin = (double)(lat/1e6-latdeg)*100/60.0;
|
|
londeg = (int)lon / 1e6;
|
|
lonmin = (double)(lon/1e6-londeg)*100/60.0;
|
|
gpx.lat = (double)latdeg+latmin;
|
|
gpx.lon = (double)londeg+lonmin;
|
|
gpx.alt = (double)alt/1e2;
|
|
|
|
printf(" ");
|
|
printf("lat: %.5f lon: %.5f alt: %.2f", gpx.lat, gpx.lon, gpx.alt);
|
|
printf(" ");
|
|
|
|
vD = bits2val(subframe_bits+HEADLEN+46*4+17, 16);
|
|
vH = bits2val(subframe_bits+HEADLEN+46*5 , 16);
|
|
velD = (double)vD/1e2; // course, true
|
|
velH = (double)vH/1.94384e2; // knots -> m/s
|
|
gpx.vH = velH;
|
|
gpx.vD = velD;
|
|
|
|
printf(" (vH: %.1fm/s D: %.2f)", gpx.vH, gpx.vD);
|
|
printf(" ");
|
|
}
|
|
|
|
if (counter % 2 == 0) {
|
|
if (option_ecc) {
|
|
if (gps_err) printf("(no)"); else printf("(ok)");
|
|
if (err_frm) printf("[NO]"); else printf("[OK]");
|
|
}
|
|
if (option_verbose) {
|
|
if (sn > 0) {
|
|
printf(" : sn %.0f", sn);
|
|
sn = -1;
|
|
}
|
|
if (freq > 0) {
|
|
printf(" : fq %.0f", freq); // kHz
|
|
freq = -1;
|
|
}
|
|
}
|
|
printf("\n");
|
|
|
|
if (option_jsn && err_frm==0 && gps_err==0) {
|
|
char id_str[] = "xxxxxx\0\0\0\0\0\0";
|
|
if (gpx.sn > 0 && gpx.sn < 1e9) {
|
|
sprintf(id_str, "%.0f", gpx.sn);
|
|
}
|
|
printf("{ \"type\": \"%s\"", "IMS100");
|
|
printf(", \"frame\": %d, \"id\": \"IMS100-%s\", \"datetime\": \"%04d-%02d-%02dT%02d:%02d:%06.3fZ\", \"lat\": %.5f, \"lon\": %.5f, \"alt\": %.5f, \"vel_h\": %.5f, \"heading\": %.5f }\n",
|
|
gpx.frnr, id_str, gpx.jahr, gpx.monat, gpx.tag, gpx.std, gpx.min, gpx.sek, gpx.lat, gpx.lon, gpx.alt, gpx.vH, gpx.vD );
|
|
printf("\n");
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
else { // raw
|
|
|
|
val = bits2val(subframe_bits, HEADLEN);
|
|
|
|
printf("%06X ", val & 0xFFFFFF);
|
|
//printf(" ");
|
|
for (j = 0; j < 6; j++) {
|
|
|
|
val = bits2val(subframe_bits+HEADLEN+46*j , 16);
|
|
printf("%04X ", val & 0xFFFF);
|
|
|
|
val = bits2val(subframe_bits+HEADLEN+46*j+17, 16);
|
|
printf("%04X ", val & 0xFFFF);
|
|
|
|
//val = bits2val(subframe_bits+HEADLEN+46*j+34, 12);
|
|
//printf("%03X ", val & 0xFFF);
|
|
//printf(" ");
|
|
}
|
|
|
|
if (option_ecc && option_verbose) {
|
|
printf("#");
|
|
for (block = 0; block < 6; block++) printf("%X", block_err[block]);
|
|
printf("# ");
|
|
}
|
|
|
|
if (subframe > 0) printf("\n");
|
|
}
|
|
|
|
bitpos = 0;
|
|
header_found += 1;
|
|
}
|
|
header_found = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
|
|
if (!option_softin) free_buffers(&dsp);
|
|
else {
|
|
if (hdb.buf) { free(hdb.buf); hdb.buf = NULL; }
|
|
}
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
|