kopia lustrzana https://github.com/rs1729/RS
1666 wiersze
54 KiB
C
1666 wiersze
54 KiB
C
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/*
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* rs92
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* sync header: correlation/matched filter
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* files: rs92mod.c nav_gps_vel.c bch_ecc_mod.c bch_ecc_mod.h demod_mod.c demod_mod.h
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* compile:
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* (a)
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* gcc -c demod_mod.c
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* gcc -DINCLUDESTATIC rs92mod.c demod_mod.o -lm -o rs92mod
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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 rs92mod.c demod_mod.o bch_ecc_mod.o -lm -o rs92mod
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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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//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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#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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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 aux; // aux/ozone
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i8_t jsn; // JSON output (auto_rx)
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i8_t ngp;
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} option_t;
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typedef struct {
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int typ;
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int msglen;
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int msgpos;
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int parpos;
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int hdrlen;
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int frmlen;
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} rscfg_t;
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static rscfg_t cfg_rs92 = { 92, 240-6-24, 6, 240-24, 6, 240};
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/* --- RS92-SGP: 8N1 manchester --- */
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#define BITS (1+8+1) // 10
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//#define HEADLEN 60
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#define FRAMESTART 6 //((HEADLEN)/BITS)
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#define FRAME_LEN 240
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/* 2A 10*/
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static char rs92_rawheader[] = //"10100110011001101001"
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//"10100110011001101001"
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//"10100110011001101001"
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"10100110011001101001"
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"1010011001100110100110101010100110101001";
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static ui8_t rs92_header_bytes[6] = { 0x2A, 0x2A, 0x2A, 0x2A, 0x2A, 0x10};
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#include "nav_gps_vel.c"
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typedef struct {
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i8_t opt_vergps;
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i8_t opt_iter;
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i8_t opt_vel;
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float dop_limit; // 9.9
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float d_err; // 10000
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int almanac;
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int ephem;
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int exSat; // -1
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ui8_t WEEK1024epoch; // SEM almanac, GPS epoch (1: 1999-2019)
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ui8_t sat_status[12];
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ui8_t prn[12]; // valide PRN 0,..,k-1
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ui8_t prn32toggle; // 0x1
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ui8_t prn32next;
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EPHEM_t alm[33];
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EPHEM_t *ephs;
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SAT_t sat[33];
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SAT_t sat1s[33];
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} GPS_t;
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typedef struct {
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int frnr;
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char id[11];
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int week; int gpssec;
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int jahr; int monat; int tag;
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int wday;
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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 vU;
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int sats[4];
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double dop;
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ui16_t conf_kt; // kill timer (sec)
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int freq;
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ui32_t crc;
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ui8_t frame[FRAME_LEN]; // { 0x2A, 0x2A, 0x2A, 0x2A, 0x2A, 0x10}
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unsigned short aux[4];
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double diter;
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option_t option;
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RS_t RS;
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GPS_t gps;
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} gpx_t;
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/* --- RS92-SGP ------------------- */
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#define MASK_LEN 64
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static ui8_t mask[MASK_LEN] = { 0x96, 0x83, 0x3E, 0x51, 0xB1, 0x49, 0x08, 0x98,
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0x32, 0x05, 0x59, 0x0E, 0xF9, 0x44, 0xC6, 0x26,
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0x21, 0x60, 0xC2, 0xEA, 0x79, 0x5D, 0x6D, 0xA1,
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0x54, 0x69, 0x47, 0x0C, 0xDC, 0xE8, 0x5C, 0xF1,
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0xF7, 0x76, 0x82, 0x7F, 0x07, 0x99, 0xA2, 0x2C,
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0x93, 0x7C, 0x30, 0x63, 0xF5, 0x10, 0x2E, 0x61,
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0xD0, 0xBC, 0xB4, 0xB6, 0x06, 0xAA, 0xF4, 0x23,
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0x78, 0x6E, 0x3B, 0xAE, 0xBF, 0x7B, 0x4C, 0xC1};
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/* LFSR: ab i=8 (mod 64):
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* m[16+i] = m[i] ^ m[i+2] ^ m[i+4] ^ m[i+6]
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* ________________3205590EF944C6262160C2EA795D6DA15469470CDCE85CF1
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* F776827F0799A22C937C3063F5102E61D0BCB4B606AAF423786E3BAEBF7B4CC196833E51B1490898
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*/
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/* ------------------------------------------------------------------------------------ */
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#define BAUD_RATE 4800
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/* ------------------------------------------------------------------------------------ */
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// manchester1 1->10,0->01: 1.bit
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// manchester2 0->10,1->01: 2.bit
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// RS92-SGP: 8N1 manchester2
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static int bits2byte(char bits[]) {
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int i, byteval=0, d=1;
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//if (bits[0] != 0) return 0x100; // erasure?
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//if (bits[9] != 1) return 0x100; // erasure?
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for (i = 1; i <= 8; i++) { // little endian
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/* for (i = 8; i > 1; i--) { // big endian */
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if (bits[i] == 1) byteval += d;
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else if (bits[i] == 0) byteval += 0;
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d <<= 1;
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}
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return byteval;
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}
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/*
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ui8_t xorbyte(int pos) {
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return xframe[pos] ^ mask[pos % MASK_LEN];
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}
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*/
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/* ------------------------------------------------------------------------------------ */
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//#define GPS_WEEK1024 1 // SEM almanac
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#define WEEKSEC 604800
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/*
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* Convert GPS Week and Seconds to Modified Julian Day.
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* - Adapted from sci.astro FAQ.
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* - Ignores UTC leap seconds.
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*/
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// in : week, gpssec
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// out: jahr, monat, tag
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static void Gps2Date(gpx_t *gpx) {
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long GpsDays, Mjd;
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long J, C, Y, M;
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GpsDays = gpx->week * 7 + (gpx->gpssec / 86400);
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Mjd = 44244 + GpsDays;
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J = Mjd + 2468570;
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C = 4 * J / 146097;
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J = J - (146097 * C + 3) / 4;
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Y = 4000 * (J + 1) / 1461001;
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J = J - 1461 * Y / 4 + 31;
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M = 80 * J / 2447;
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gpx->tag = J - 2447 * M / 80;
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J = M / 11;
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gpx->monat = M + 2 - (12 * J);
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gpx->jahr = 100 * (C - 49) + Y + J;
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}
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/* ------------------------------------------------------------------------------------ */
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#define crc_FRAME (1<<0)
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#define pos_FrameNb 0x08 // 2 byte
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#define pos_SondeID 0x0C // 8 byte // oder: 0x0A, 10 byte?
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#define pos_CalData 0x17 // 1 byte, counter 0x00..0x1f
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#define pos_Calfreq 0x1A // 2 byte, calfr 0x00
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#define crc_GPS (1<<2)
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#define posGPS_TOW 0x48 // 4 byte
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#define posGPS_PRN 0x4E // 12*5 bit in 8 byte
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#define posGPS_STATUS 0x56 // 12 byte
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#define posGPS_DATA 0x62 // 12*8 byte
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#define crc_PTU (1<<1)
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#define pos_PTU 0x2C // 24 byte
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#define crc_AUX (1<<3)
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#define pos_AUX 0xC6 // 10 byte
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#define pos_AuxData 0xC8 // 8 byte
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#define BLOCK_CFG 0x6510 // frame[pos_FrameNb-2], frame[pos_FrameNb-1]
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#define BLOCK_PTU 0x690C
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#define BLOCK_GPS 0x673D // frame[posGPS_TOW-2], frame[posGPS_TOW-1]
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#define BLOCK_AUX 0x6805
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#define LEN_CFG (2*(BLOCK_CFG & 0xFF))
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#define LEN_GPS (2*(BLOCK_GPS & 0xFF))
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#define LEN_PTU (2*(BLOCK_PTU & 0xFF))
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#define LEN_AUX (2*(BLOCK_AUX & 0xFF))
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static int crc16(gpx_t *gpx, int start, int len) {
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int crc16poly = 0x1021;
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int rem = 0xFFFF, i, j;
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int byte;
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if (start+len >= FRAME_LEN) return -1;
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for (i = 0; i < len; i++) {
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byte = gpx->frame[start+i];
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rem = rem ^ (byte << 8);
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for (j = 0; j < 8; j++) {
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if (rem & 0x8000) {
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rem = (rem << 1) ^ crc16poly;
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}
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else {
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rem = (rem << 1);
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}
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rem &= 0xFFFF;
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}
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}
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return rem;
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}
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static int get_FrameNb(gpx_t *gpx) {
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int i;
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unsigned byte;
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ui8_t frnr_bytes[2];
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int frnr;
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for (i = 0; i < 2; i++) {
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byte = gpx->frame[pos_FrameNb + i];
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frnr_bytes[i] = byte;
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}
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frnr = frnr_bytes[0] + (frnr_bytes[1] << 8);
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gpx->frnr = frnr;
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return 0;
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}
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static int get_SondeID(gpx_t *gpx) {
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int i, ret=0;
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unsigned byte;
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ui8_t sondeid_bytes[10];
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int crc_frame, crc;
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// BLOCK_CFG == frame[pos_FrameNb-2 .. pos_FrameNb-1] ?
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crc_frame = gpx->frame[pos_FrameNb+LEN_CFG] | (gpx->frame[pos_FrameNb+LEN_CFG+1] << 8);
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crc = crc16(gpx, pos_FrameNb, LEN_CFG);
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if (crc_frame != crc) gpx->crc |= crc_FRAME;
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/*
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if (gpx->option.crc) {
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//fprintf(stdout, " (%04X:%02X%02X) ", BLOCK_CFG, frame[pos_FrameNb-2], frame[pos_FrameNb-1]);
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fprintf(stdout, " [%04X:%04X] ", crc_frame, crc);
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}
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*/
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ret = 0;
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if ( /*0 &&*/ gpx->option.crc && crc != crc_frame) {
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ret = -2; // erst wichtig, wenn Cal/Cfg-Data
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}
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for (i = 0; i < 8; i++) {
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byte = gpx->frame[pos_SondeID + i];
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if ((byte < 0x20) || (byte > 0x7E)) return -1;
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sondeid_bytes[i] = byte;
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}
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for (i = 0; i < 8; i++) {
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gpx->id[i] = sondeid_bytes[i];
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}
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gpx->id[8] = '\0';
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return ret;
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}
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static int get_PTU(gpx_t *gpx) {
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int ret=0;
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int crc_frame, crc;
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crc_frame = gpx->frame[pos_PTU+LEN_PTU] | (gpx->frame[pos_PTU+LEN_PTU+1] << 8);
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crc = crc16(gpx, pos_PTU, LEN_PTU);
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if (crc_frame != crc) gpx->crc |= crc_PTU;
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ret = 0;
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if (gpx->option.crc && crc != crc_frame) {
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ret = -2;
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}
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return ret;
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}
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//char weekday[7][3] = { "So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"};
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static char weekday[7][4] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
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static int get_GPStime(gpx_t *gpx) {
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int i, ret=0;
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unsigned byte;
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ui8_t gpstime_bytes[4];
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ui32_t gpstime = 0; // 32bit
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int day;
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int ms;
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int crc_frame, crc;
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// BLOCK_GPS == frame[posGPS_TOW-2 .. posGPS_TOW-1] ?
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crc_frame = gpx->frame[posGPS_TOW+LEN_GPS] | (gpx->frame[posGPS_TOW+LEN_GPS+1] << 8);
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crc = crc16(gpx, posGPS_TOW, LEN_GPS);
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if (crc_frame != crc) gpx->crc |= crc_GPS;
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/*
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if (gpx->option.crc) {
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//fprintf(stdout, " (%04X:%02X%02X) ", BLOCK_GPS, frame[posGPS_TOW-2], frame[posGPS_TOW-1]);
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fprintf(stdout, " [%04X:%04X] ", crc_frame, crc);
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}
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*/
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ret = 0;
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if (gpx->option.crc && crc != crc_frame) {
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ret = -2;
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}
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for (i = 0; i < 4; i++) {
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byte = gpx->frame[posGPS_TOW + i];
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gpstime_bytes[i] = byte;
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}
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memcpy(&gpstime, gpstime_bytes, 4);
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ms = gpstime % 1000;
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gpstime /= 1000;
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gpx->gpssec = gpstime;
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day = (gpstime / (24 * 3600)) % 7; // besser CRC-check, da auch
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//if ((day < 0) || (day > 6)) return -1; // gpssec=604800,604801 beobachtet
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gpstime %= (24*3600);
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gpx->wday = day;
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gpx->std = gpstime / 3600;
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gpx->min = (gpstime % 3600) / 60;
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gpx->sek = gpstime % 60 + ms/1000.0;
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return ret;
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}
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static int get_Aux(gpx_t *gpx) {
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int i, ret=0;
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unsigned short byte;
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int crc_frame, crc;
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crc_frame = gpx->frame[pos_AUX+LEN_AUX] | (gpx->frame[pos_AUX+LEN_AUX+1] << 8);
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crc = crc16(gpx, pos_AUX, LEN_AUX);
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if (crc_frame != crc) gpx->crc |= crc_AUX;
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ret = 0;
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if (gpx->option.crc && crc != crc_frame) {
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ret = -2;
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}
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for (i = 0; i < 4; i++) {
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byte = gpx->frame[pos_AuxData+2*i] + (gpx->frame[pos_AuxData+2*i+1]<<8);
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gpx->aux[i] = byte;
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}
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return ret;
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}
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static int get_Cal(gpx_t *gpx) {
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int i;
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unsigned byte;
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ui8_t calfr = 0;
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//ui8_t burst = 0;
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ui8_t bytes[2];
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int freq = 0;
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ui16_t killtime = 0;
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byte = gpx->frame[pos_CalData];
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calfr = byte;
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if (gpx->option.vbs == 4) {
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fprintf(stdout, "\n");
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fprintf(stdout, "[%5d] ", gpx->frnr);
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fprintf(stdout, " 0x%02x:", calfr);
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for (i = 0; i < 16; i++) {
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byte = gpx->frame[pos_CalData+1+i];
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fprintf(stdout, " %02x", byte);
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}
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if ((gpx->crc & crc_FRAME)==0) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]");
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}
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if (gpx->option.aux) {
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if (gpx->option.vbs == 4) {
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fprintf(stdout, " # ");
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for (i = 0; i < 8; i++) {
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byte = gpx->frame[pos_AuxData+i];
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fprintf(stdout, "%02x ", byte);
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}
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}
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}
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if (calfr == 0x00) {
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for (i = 0; i < 2; i++) {
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bytes[i] = gpx->frame[pos_Calfreq + i];
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}
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byte = bytes[0] + (bytes[1] << 8);
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//fprintf(stdout, ":%04x ", byte);
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freq = 400000 + 10*byte; // kHz;
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if (gpx->option.ngp) freq = 1600000 + 10*byte; // kHz
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gpx->freq = freq;
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fprintf(stdout, ": fq %d", freq);
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for (i = 0; i < 2; i++) {
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bytes[i] = gpx->frame[pos_Calfreq + 2 + i];
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}
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killtime = bytes[0] + (bytes[1] << 8); // signed?
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if (killtime < 0xFFFF && gpx->option.vbs == 4) {
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fprintf(stdout, "; KT:%ds", killtime);
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}
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gpx->conf_kt = killtime;
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}
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return 0;
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}
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/* ---------------------------------------------------------------------------------------------------- */
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static int prnbits_le(ui16_t byte16, ui8_t bits[64], int block) {
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int i; /* letztes bit Ueberlauf, wenn 3. PRN = 32 */
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for (i = 0; i < 15; i++) {
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bits[15*block+i] = byte16 & 1;
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byte16 >>= 1;
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}
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bits[60+block] = byte16 & 1;
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return byte16 & 1;
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}
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static void prn12(GPS_t *gps, ui8_t *prn_le, ui8_t prns[12]) {
|
|
int i, j, d;
|
|
ui8_t ind_prn32 = 32;
|
|
|
|
for (i = 0; i < 12; i++) {
|
|
prns[i] = 0;
|
|
d = 1;
|
|
for (j = 0; j < 5; j++) {
|
|
if (prn_le[5*i+j]) prns[i] += d;
|
|
d <<= 1;
|
|
}
|
|
}
|
|
for (i = 0; i < 12; i++) {
|
|
// PRN-32 overflow
|
|
if ( (prns[i] == 0) && (gps->sat_status[i] & 0x0F) ) { // 5 bit: 0..31
|
|
if ( ((i % 3 == 2) && (prn_le[60+i/3] & 1)) // Spalte 2
|
|
|| ((i % 3 != 2) && (prn_le[5*(i+1)] & 1)) ) { // Spalte 0,1
|
|
prns[i] = 32; ind_prn32 = i;
|
|
}
|
|
}
|
|
else if ((gps->sat_status[i] & 0x0F) == 0) { // erste beiden bits: 0x03 ?
|
|
prns[i] = 0;
|
|
}
|
|
}
|
|
|
|
gps->prn32next = 0;
|
|
if (ind_prn32 < 12) {
|
|
// PRN-32 overflow
|
|
if (ind_prn32 % 3 != 2) { // -> ind_prn32<11 // vorausgesetzt im Block folgt auf PRN-32
|
|
if ((gps->sat_status[ind_prn32+1] & 0x0F) && prns[ind_prn32+1] > 1) { // entweder PRN-1 oder PRN-gerade
|
|
// && prns[ind_prn32+1] != 3 ?
|
|
for (j = 0; j < ind_prn32; j++) {
|
|
if (prns[j] == (prns[ind_prn32+1]^gps->prn32toggle) && (gps->sat_status[j] & 0x0F)) break;
|
|
}
|
|
if (j < ind_prn32) { gps->prn32toggle ^= 0x1; }
|
|
else {
|
|
for (j = ind_prn32+2; j < 12; j++) {
|
|
if (prns[j] == (prns[ind_prn32+1]^gps->prn32toggle) && (gps->sat_status[j] & 0x0F)) break;
|
|
}
|
|
if (j < 12) { gps->prn32toggle ^= 0x1; }
|
|
}
|
|
prns[ind_prn32+1] ^= gps->prn32toggle;
|
|
/*
|
|
// nochmal testen
|
|
for (j = 0; j < ind_prn32; j++) { if (prns[j] == prns[ind_prn32+1]) break; }
|
|
if (j < ind_prn32) prns[ind_prn32+1] = 0;
|
|
else {
|
|
for (j = ind_prn32+2; j < 12; j++) { if (prns[j] == prns[ind_prn32+1]) break; }
|
|
if (j < 12) prns[ind_prn32+1] = 0;
|
|
}
|
|
if (prns[ind_prn32+1] == 0) { gps->prn32toggle ^= 0x1; }
|
|
*/
|
|
}
|
|
gps->prn32next = prns[ind_prn32+1]; // -> ind_prn32<11 && ind_prn32 % 3 != 2
|
|
}
|
|
}
|
|
}
|
|
|
|
static int calc_satpos_alm(gpx_t *gpx, double t, SAT_t *satp) {
|
|
double X, Y, Z, vX, vY, vZ;
|
|
int j;
|
|
int week;
|
|
double cl_corr, cl_drift;
|
|
int rollover = 0;
|
|
EPHEM_t *alm = gpx->gps.alm;
|
|
|
|
for (j = 1; j < 33; j++) {
|
|
if (alm[j].prn > 0 && alm[j].health == 0) { // prn==j
|
|
|
|
// Woche hat 604800 sec
|
|
if (t-alm[j].toa > WEEKSEC/2) rollover = +1;
|
|
else if (t-alm[j].toa < -WEEKSEC/2) rollover = -1;
|
|
else rollover = 0;
|
|
week = alm[j].week - rollover;
|
|
/*if (j == 1)*/ gpx->week = week + gpx->gps.WEEK1024epoch*1024;
|
|
|
|
if (gpx->gps.opt_vel >= 2) {
|
|
GPS_SatellitePositionVelocity_Ephem(
|
|
week, t, alm[j],
|
|
&cl_corr, &cl_drift, &X, &Y, &Z, &vX, &vY, &vZ
|
|
);
|
|
satp[alm[j].prn].clock_drift = cl_drift;
|
|
satp[alm[j].prn].vX = vX;
|
|
satp[alm[j].prn].vY = vY;
|
|
satp[alm[j].prn].vZ = vZ;
|
|
}
|
|
else {
|
|
GPS_SatellitePosition_Ephem(
|
|
week, t, alm[j],
|
|
&cl_corr, &X, &Y, &Z
|
|
);
|
|
}
|
|
|
|
satp[alm[j].prn].X = X;
|
|
satp[alm[j].prn].Y = Y;
|
|
satp[alm[j].prn].Z = Z;
|
|
satp[alm[j].prn].clock_corr = cl_corr;
|
|
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int calc_satpos_rnx2(gpx_t *gpx, double t, SAT_t *satp) {
|
|
double X, Y, Z, vX, vY, vZ;
|
|
int j;
|
|
int week;
|
|
double cl_corr, cl_drift;
|
|
double tdiff, td;
|
|
int count, count0, satfound;
|
|
int rollover = 0;
|
|
EPHEM_t *eph = gpx->gps.ephs;
|
|
|
|
for (j = 1; j < 33; j++) {
|
|
|
|
count = count0 = 0;
|
|
satfound = 0;
|
|
|
|
// Woche hat 604800 sec
|
|
tdiff = WEEKSEC;
|
|
|
|
while (eph[count].prn > 0) {
|
|
|
|
if (eph[count].prn == j && eph[count].health == 0) {
|
|
|
|
satfound += 1;
|
|
|
|
if (t - eph[count].toe > WEEKSEC/2) rollover = +1;
|
|
else if (t - eph[count].toe < -WEEKSEC/2) rollover = -1;
|
|
else rollover = 0;
|
|
td = fabs( t - eph[count].toe - rollover*WEEKSEC);
|
|
|
|
if ( td < tdiff ) {
|
|
tdiff = td;
|
|
week = eph[count].week - rollover;
|
|
gpx->week = eph[count].gpsweek - rollover;
|
|
count0 = count;
|
|
}
|
|
}
|
|
count += 1;
|
|
}
|
|
|
|
if ( satfound )
|
|
{
|
|
if (gpx->gps.opt_vel >= 2) {
|
|
GPS_SatellitePositionVelocity_Ephem(
|
|
week, t, eph[count0],
|
|
&cl_corr, &cl_drift, &X, &Y, &Z, &vX, &vY, &vZ
|
|
);
|
|
satp[j].clock_drift = cl_drift;
|
|
satp[j].vX = vX;
|
|
satp[j].vY = vY;
|
|
satp[j].vZ = vZ;
|
|
}
|
|
else {
|
|
GPS_SatellitePosition_Ephem(
|
|
week, t, eph[count0],
|
|
&cl_corr, &X, &Y, &Z
|
|
);
|
|
}
|
|
|
|
satp[j].X = X;
|
|
satp[j].Y = Y;
|
|
satp[j].Z = Z;
|
|
satp[j].clock_corr = cl_corr;
|
|
satp[j].ephtime = eph[count0].toe;
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
typedef struct {
|
|
ui32_t tow;
|
|
ui8_t status;
|
|
int chips;
|
|
int deltachips;
|
|
} RANGE_t;
|
|
|
|
// pseudo.range = -df*pseudo.chips
|
|
// df = lightspeed/(chips/sec)/2^10
|
|
const double df = 299792.458/1023.0/1024.0; //0.286183844 // c=299792458m/s, 1023000chips/s
|
|
// dl = L1/(chips/sec)/4
|
|
const double dl = 1575.42/1.023/4.0; //385.0 // GPS L1 1575.42MHz=154*10.23MHz, dl=154*10/4
|
|
|
|
static int get_pseudorange(gpx_t *gpx) {
|
|
ui32_t gpstime;
|
|
ui8_t gpstime_bytes[4];
|
|
ui8_t pseudobytes[4];
|
|
unsigned chipbytes, deltabytes;
|
|
int i, j, k;
|
|
ui8_t bytes[4];
|
|
ui16_t byte16;
|
|
double pr0, prj;
|
|
ui8_t prn_le[12*5+4]; // le - little endian
|
|
ui8_t prns[12]; // PRNs in data
|
|
RANGE_t range[33];
|
|
|
|
memset(prn_le, 0, sizeof(prn_le));
|
|
memset(prns, 0, sizeof(prns));
|
|
memset(range, 0, sizeof(range));
|
|
|
|
// GPS-TOW in ms
|
|
for (i = 0; i < 4; i++) {
|
|
gpstime_bytes[i] = gpx->frame[posGPS_TOW + i];
|
|
}
|
|
memcpy(&gpstime, gpstime_bytes, 4);
|
|
|
|
// Sat Status
|
|
for (i = 0; i < 12; i++) {
|
|
gpx->gps.sat_status[i] = gpx->frame[posGPS_STATUS + i];
|
|
}
|
|
|
|
// PRN-Nummern
|
|
for (i = 0; i < 4; i++) {
|
|
for (j = 0; j < 2; j++) {
|
|
bytes[j] = gpx->frame[posGPS_PRN+2*i+j];
|
|
}
|
|
memcpy(&byte16, bytes, 2);
|
|
prnbits_le(byte16, prn_le, i);
|
|
}
|
|
prn12(&gpx->gps, prn_le, prns);
|
|
|
|
|
|
// GPS Sat Pos (& Vel)
|
|
if (gpx->gps.almanac) calc_satpos_alm( gpx, gpstime/1000.0, gpx->gps.sat);
|
|
if (gpx->gps.ephem) calc_satpos_rnx2(gpx, gpstime/1000.0, gpx->gps.sat);
|
|
|
|
// GPS Sat Pos t -= 1s
|
|
if (gpx->gps.opt_vel == 1) {
|
|
if (gpx->gps.almanac) calc_satpos_alm( gpx, gpstime/1000.0-1, gpx->gps.sat1s);
|
|
if (gpx->gps.ephem) calc_satpos_rnx2(gpx, gpstime/1000.0-1, gpx->gps.sat1s);
|
|
}
|
|
|
|
k = 0;
|
|
for (j = 0; j < 12; j++) {
|
|
|
|
// Pseudorange/chips
|
|
for (i = 0; i < 4; i++) {
|
|
pseudobytes[i] = gpx->frame[posGPS_DATA+8*j+i];
|
|
}
|
|
memcpy(&chipbytes, pseudobytes, 4);
|
|
|
|
// delta_pseudochips / 385
|
|
for (i = 0; i < 3; i++) {
|
|
pseudobytes[i] = gpx->frame[posGPS_DATA+8*j+4+i];
|
|
}
|
|
deltabytes = 0; // bzw. pseudobytes[3]=0 (24 bit); deltabytes & (0xFF<<24) als
|
|
memcpy(&deltabytes, pseudobytes, 3); // gemeinsamer offset relevant in --vel1 !
|
|
|
|
//if ( (prns[j] == 0) && (gpx->gps.sat_status[j] & 0x0F) ) prns[j] = 32;
|
|
range[prns[j]].tow = gpstime;
|
|
range[prns[j]].status = gpx->gps.sat_status[j];
|
|
|
|
if ( chipbytes == 0x7FFFFFFF || chipbytes == 0x55555555 ) {
|
|
range[prns[j]].chips = 0;
|
|
continue;
|
|
}
|
|
if (gpx->gps.opt_vergps != 8) {
|
|
if ( chipbytes > 0x10000000 && chipbytes < 0xF0000000 ) {
|
|
range[prns[j]].chips = 0;
|
|
continue;
|
|
}}
|
|
|
|
range[prns[j]].chips = chipbytes;
|
|
range[prns[j]].deltachips = deltabytes;
|
|
|
|
/*
|
|
if (range[prns[j]].deltachips == 0x555555) {
|
|
range[prns[j]].deltachips = 0;
|
|
continue;
|
|
}
|
|
*/
|
|
if ( (prns[j] > 0) && ((gpx->gps.sat_status[j] & 0x0F) == 0xF)
|
|
&& (dist(gpx->gps.sat[prns[j]].X, gpx->gps.sat[prns[j]].Y, gpx->gps.sat[prns[j]].Z, 0, 0, 0) > 6700000) )
|
|
{
|
|
for (i = 0; i < k; i++) { if (gpx->gps.prn[i] == prns[j]) break; }
|
|
if (i == k && prns[j] != gpx->gps.exSat) {
|
|
//if ( range[prns[j]].status & 0xF0 ) // Signalstaerke > 0 ?
|
|
{
|
|
gpx->gps.prn[k] = prns[j];
|
|
k++;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
for (j = 0; j < 12; j++) { // 0x013FB0A4
|
|
gpx->gps.sat[prns[j]].pseudorange = /*0x01400000*/ - range[prns[j]].chips * df;
|
|
gpx->gps.sat1s[prns[j]].pseudorange = -(range[prns[j]].chips - range[prns[j]].deltachips/dl)*df;
|
|
//+ sat[prns[j]].clock_corr - gpx->gps.sat1s[prns[j]].clock_corr
|
|
gpx->gps.sat[prns[j]].pseudorate = - range[prns[j]].deltachips * df / dl;
|
|
|
|
gpx->gps.sat[prns[j]].prn = prns[j];
|
|
gpx->gps.sat1s[prns[j]].prn = prns[j];
|
|
}
|
|
|
|
|
|
pr0 = (double)0x01400000;
|
|
for (j = 0; j < k; j++) {
|
|
prj = gpx->gps.sat[gpx->gps.prn[j]].pseudorange + gpx->gps.sat[gpx->gps.prn[j]].clock_corr;
|
|
if (prj < pr0) pr0 = prj;
|
|
}
|
|
for (j = 0; j < k; j++) gpx->gps.sat[gpx->gps.prn[j]].PR = gpx->gps.sat[gpx->gps.prn[j]].pseudorange
|
|
+ gpx->gps.sat[gpx->gps.prn[j]].clock_corr - pr0 + 20e6;
|
|
// es kann PRNs geben, die zeitweise stark abweichende PR liefern;
|
|
// eventuell Standardabweichung ermitteln und fehlerhafte Sats weglassen
|
|
for (j = 0; j < k; j++) { // sat/sat1s... PR-check
|
|
gpx->gps.sat1s[gpx->gps.prn[j]].PR = gpx->gps.sat1s[gpx->gps.prn[j]].pseudorange
|
|
+ gpx->gps.sat[gpx->gps.prn[j]].clock_corr - pr0 + 20e6;
|
|
}
|
|
|
|
return k;
|
|
}
|
|
|
|
static int get_GPSvel(double lat, double lon, double vel_ecef[3],
|
|
double *vH, double *vD, double *vU) {
|
|
// ECEF-Velocities
|
|
// ECEF-Vel -> NorthEastUp
|
|
double phi = lat*M_PI/180.0;
|
|
double lam = lon*M_PI/180.0;
|
|
double vN = -vel_ecef[0]*sin(phi)*cos(lam) - vel_ecef[1]*sin(phi)*sin(lam) + vel_ecef[2]*cos(phi);
|
|
double vE = -vel_ecef[0]*sin(lam) + vel_ecef[1]*cos(lam);
|
|
*vU = vel_ecef[0]*cos(phi)*cos(lam) + vel_ecef[1]*cos(phi)*sin(lam) + vel_ecef[2]*sin(phi);
|
|
// NEU -> HorDirVer
|
|
*vH = sqrt(vN*vN+vE*vE);
|
|
*vD = atan2(vE, vN) * 180 / M_PI;
|
|
if (*vD < 0) *vD += 360;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_GPSkoord(gpx_t *gpx, int N) {
|
|
double lat, lon, alt, rx_cl_bias;
|
|
double vH, vD, vU;
|
|
double lat1s, lon1s, alt1s,
|
|
lat0 , lon0 , alt0 , pos0_ecef[3];
|
|
double pos_ecef[3], pos1s_ecef[3], dpos_ecef[3],
|
|
vel_ecef[3], dvel_ecef[3];
|
|
double gdop, gdop0 = 1000.0;
|
|
//double hdop, vdop, pdop;
|
|
double DOP[4];
|
|
int i0, i1, i2, i3, j, k, n;
|
|
int nav_ret = 0;
|
|
int num = 0;
|
|
SAT_t Sat_A[4];
|
|
SAT_t Sat_B[12]; // N <= 12
|
|
SAT_t Sat_B1s[12];
|
|
SAT_t Sat_C[12]; // 11
|
|
double diter;
|
|
int exN = -1;
|
|
|
|
if (gpx->gps.opt_vergps == 8) {
|
|
fprintf(stdout, " sats: ");
|
|
for (j = 0; j < N; j++) fprintf(stdout, "%02d ", gpx->gps.prn[j]);
|
|
fprintf(stdout, "\n");
|
|
}
|
|
|
|
gpx->lat = gpx->lon = gpx->alt = 0;
|
|
DOP[0] = DOP[1] = DOP[2] = DOP[3] = 0.0;
|
|
|
|
if (gpx->gps.opt_vergps != 2) {
|
|
for (i0=0;i0<N;i0++) { for (i1=i0+1;i1<N;i1++) { for (i2=i1+1;i2<N;i2++) { for (i3=i2+1;i3<N;i3++) {
|
|
|
|
Sat_A[0] = gpx->gps.sat[gpx->gps.prn[i0]];
|
|
Sat_A[1] = gpx->gps.sat[gpx->gps.prn[i1]];
|
|
Sat_A[2] = gpx->gps.sat[gpx->gps.prn[i2]];
|
|
Sat_A[3] = gpx->gps.sat[gpx->gps.prn[i3]];
|
|
nav_ret = NAV_ClosedFormSolution_FromPseudorange( Sat_A, &lat, &lon, &alt, &rx_cl_bias, pos_ecef );
|
|
|
|
if (nav_ret == 0) {
|
|
num += 1;
|
|
if (calc_DOPn(4, Sat_A, pos_ecef, DOP) == 0) {
|
|
gdop = sqrt(DOP[0]+DOP[1]+DOP[2]+DOP[3]);
|
|
//fprintf(stdout, " DOP : %.1f ", gdop);
|
|
|
|
NAV_LinP(4, Sat_A, pos_ecef, rx_cl_bias, dpos_ecef, &rx_cl_bias);
|
|
diter = dist(0, 0, 0, dpos_ecef[0], dpos_ecef[1], dpos_ecef[2]);
|
|
for (j = 0; j < 3; j++) pos_ecef[j] += dpos_ecef[j];
|
|
ecef2elli(pos_ecef[0], pos_ecef[1], pos_ecef[2], &lat, &lon, &alt);
|
|
if ( gpx->gps.opt_vel == 4 ) {
|
|
vel_ecef[0] = vel_ecef[1] = vel_ecef[2] = 0;
|
|
NAV_LinV(4, Sat_A, pos_ecef, vel_ecef, 0.0, dvel_ecef, &rx_cl_bias);
|
|
for (j=0; j<3; j++) vel_ecef[j] += dvel_ecef[j];
|
|
NAV_LinV(4, Sat_A, pos_ecef, vel_ecef, rx_cl_bias, dvel_ecef, &rx_cl_bias);
|
|
for (j=0; j<3; j++) vel_ecef[j] += dvel_ecef[j];
|
|
get_GPSvel(lat, lon, vel_ecef, &vH, &vD, &vU);
|
|
}
|
|
if (gpx->gps.opt_vergps == 8) {
|
|
// gdop = sqrt(DOP[0]+DOP[1]+DOP[2]+DOP[3]); // s.o.
|
|
//hdop = sqrt(DOP[0]+DOP[1]);
|
|
//vdop = sqrt(DOP[2]);
|
|
//pdop = sqrt(DOP[0]+DOP[1]+DOP[2]);
|
|
if (gdop < gpx->gps.dop_limit) {
|
|
fprintf(stdout, " ");
|
|
fprintf(stdout, "lat: %.5f , lon: %.5f , alt: %.1f ", lat, lon, alt);
|
|
fprintf(stdout, " (d:%.1f)", diter);
|
|
if ( gpx->gps.opt_vel == 4 ) {
|
|
fprintf(stdout, " vH: %4.1f D: %5.1f vV: %3.1f ", vH, vD, vU);
|
|
}
|
|
fprintf(stdout, " sats: ");
|
|
fprintf(stdout, "%02d %02d %02d %02d ", gpx->gps.prn[i0], gpx->gps.prn[i1], gpx->gps.prn[i2], gpx->gps.prn[i3]);
|
|
fprintf(stdout, " GDOP : %.1f ", gdop);
|
|
//fprintf(stdout, " HDOP: %.1f VDOP: %.1f ", hdop, vdop);
|
|
//fprintf(stdout, " PDOP: %.1f ", pdop);
|
|
fprintf(stdout, "\n");
|
|
}
|
|
}
|
|
}
|
|
else gdop = -1;
|
|
|
|
if (gdop > 0 && gdop < gdop0) { // wenn fehlerhafter Sat, diter wohl besserer Indikator
|
|
gpx->lat = lat;
|
|
gpx->lon = lon;
|
|
gpx->alt = alt;
|
|
gpx->dop = gdop;
|
|
gpx->diter = diter;
|
|
gpx->sats[0] = gpx->gps.prn[i0]; gpx->sats[1] = gpx->gps.prn[i1]; gpx->sats[2] = gpx->gps.prn[i2]; gpx->sats[3] = gpx->gps.prn[i3];
|
|
gdop0 = gdop;
|
|
|
|
if (gpx->gps.opt_vel == 4) {
|
|
gpx->vH = vH;
|
|
gpx->vD = vD;
|
|
gpx->vU = vU;
|
|
}
|
|
}
|
|
}
|
|
|
|
}}}}
|
|
}
|
|
|
|
if (gpx->gps.opt_vergps == 8 || gpx->gps.opt_vergps == 2) {
|
|
|
|
for (j = 0; j < N; j++) Sat_B[j] = gpx->gps.sat[gpx->gps.prn[j]];
|
|
for (j = 0; j < N; j++) Sat_B1s[j] = gpx->gps.sat1s[gpx->gps.prn[j]];
|
|
|
|
NAV_bancroft1(N, Sat_B, pos_ecef, &rx_cl_bias);
|
|
ecef2elli(pos_ecef[0], pos_ecef[1], pos_ecef[2], &lat, &lon, &alt);
|
|
gdop = -1;
|
|
if (calc_DOPn(N, Sat_B, pos_ecef, DOP) == 0) {
|
|
gdop = sqrt(DOP[0]+DOP[1]+DOP[2]+DOP[3]);
|
|
}
|
|
|
|
NAV_LinP(N, Sat_B, pos_ecef, rx_cl_bias, dpos_ecef, &rx_cl_bias);
|
|
if (gpx->gps.opt_iter) {
|
|
for (j = 0; j < 3; j++) pos_ecef[j] += dpos_ecef[j];
|
|
ecef2elli(pos_ecef[0], pos_ecef[1], pos_ecef[2], &lat, &lon, &alt);
|
|
}
|
|
gpx->diter = dist(0, 0, 0, dpos_ecef[0], dpos_ecef[1], dpos_ecef[2]);
|
|
|
|
// Sat mit schlechten Daten suchen
|
|
if (gpx->diter > gpx->gps.d_err) {
|
|
if (N > 5) { // N > 4 kann auch funktionieren
|
|
for (n = 0; n < N; n++) {
|
|
k = 0;
|
|
for (j = 0; j < N; j++) {
|
|
if (j != n) {
|
|
Sat_C[k] = Sat_B[j];
|
|
k++;
|
|
}
|
|
}
|
|
for (j = 0; j < 3; j++) pos0_ecef[j] = 0;
|
|
NAV_bancroft1(N-1, Sat_C, pos0_ecef, &rx_cl_bias);
|
|
NAV_LinP(N-1, Sat_C, pos0_ecef, rx_cl_bias, dpos_ecef, &rx_cl_bias);
|
|
diter = dist(0, 0, 0, dpos_ecef[0], dpos_ecef[1], dpos_ecef[2]);
|
|
ecef2elli(pos0_ecef[0], pos0_ecef[1], pos0_ecef[2], &lat0, &lon0, &alt0);
|
|
if (diter < gpx->diter) {
|
|
gpx->diter = diter;
|
|
for (j = 0; j < 3; j++) pos_ecef[j] = pos0_ecef[j];
|
|
lat = lat0;
|
|
lon = lon0;
|
|
alt = alt0;
|
|
exN = n;
|
|
}
|
|
}
|
|
if (exN >= 0) {
|
|
if (gpx->gps.prn[exN] == gpx->gps.prn32next) gpx->gps.prn32toggle ^= 0x1;
|
|
for (k = exN; k < N-1; k++) {
|
|
Sat_B[k] = Sat_B[k+1];
|
|
gpx->gps.prn[k] = gpx->gps.prn[k+1];
|
|
if (gpx->gps.opt_vel == 1) {
|
|
Sat_B1s[k] = Sat_B1s[k+1];
|
|
}
|
|
}
|
|
N = N-1;
|
|
if (calc_DOPn(N, Sat_B, pos_ecef, DOP) == 0) {
|
|
gdop = sqrt(DOP[0]+DOP[1]+DOP[2]+DOP[3]);
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
if (exN < 0 && gpx->gps.prn32next > 0) {
|
|
//prn32next used in pre-fix? prn32toggle ^= 0x1;
|
|
}
|
|
*/
|
|
}
|
|
|
|
if (gpx->gps.opt_vel == 1) {
|
|
NAV_bancroft1(N, Sat_B1s, pos1s_ecef, &rx_cl_bias);
|
|
if (gpx->gps.opt_iter) {
|
|
NAV_LinP(N, Sat_B1s, pos1s_ecef, rx_cl_bias, dpos_ecef, &rx_cl_bias);
|
|
for (j = 0; j < 3; j++) pos1s_ecef[j] += dpos_ecef[j];
|
|
}
|
|
for (j = 0; j < 3; j++) vel_ecef[j] = pos_ecef[j] - pos1s_ecef[j];
|
|
get_GPSvel(lat, lon, vel_ecef, &vH, &vD, &vU);
|
|
ecef2elli(pos1s_ecef[0], pos1s_ecef[1], pos1s_ecef[2], &lat1s, &lon1s, &alt1s);
|
|
if (gpx->gps.opt_vergps == 8) {
|
|
fprintf(stdout, "\ndeltachips1s lat: %.6f , lon: %.6f , alt: %.2f ", lat1s, lon1s, alt1s);
|
|
fprintf(stdout, " vH: %4.1f D: %5.1f vV: %3.1f ", vH, vD, vU);
|
|
fprintf(stdout, "\n");
|
|
}
|
|
}
|
|
if (gpx->gps.opt_vel >= 2) {
|
|
//fprintf(stdout, "\nP(%.1f,%.1f,%.1f) \n", pos_ecef[0], pos_ecef[1], pos_ecef[2]);
|
|
vel_ecef[0] = vel_ecef[1] = vel_ecef[2] = 0;
|
|
NAV_LinV(N, Sat_B, pos_ecef, vel_ecef, 0.0, dvel_ecef, &rx_cl_bias);
|
|
for (j=0; j<3; j++) vel_ecef[j] += dvel_ecef[j];
|
|
//fprintf(stdout, " V(%.1f,%.1f,%.1f) ", vel_ecef[0], vel_ecef[1], vel_ecef[2]);
|
|
//fprintf(stdout, " rx_vel_bias: %.1f \n", rx_cl_bias);
|
|
/* 2. Iteration:
|
|
NAV_LinV(N, Sat_B, pos_ecef, vel_ecef, rx_cl_bias, dvel_ecef, &rx_cl_bias);
|
|
for (j=0; j<3; j++) vel_ecef[j] += dvel_ecef[j];
|
|
//fprintf(stdout, " V(%.1f,%.1f,%.1f) ", vel_ecef[0], vel_ecef[1], vel_ecef[2]);
|
|
//fprintf(stdout, " rx_vel_bias: %.1f \n", rx_cl_bias);
|
|
*/
|
|
get_GPSvel(lat, lon, vel_ecef, &vH, &vD, &vU);
|
|
}
|
|
|
|
if (gpx->gps.opt_vergps == 8) {
|
|
fprintf(stdout, "bancroft[%2d] lat: %.6f , lon: %.6f , alt: %.2f ", N, lat, lon, alt);
|
|
fprintf(stdout, " (d:%.1f)", gpx->diter);
|
|
if (gpx->gps.opt_vel) {
|
|
fprintf(stdout, " vH: %4.1f D: %5.1f vV: %3.1f ", vH, vD, vU);
|
|
}
|
|
fprintf(stdout, " DOP[");
|
|
for (j = 0; j < N; j++) {
|
|
fprintf(stdout, "%d", gpx->gps.prn[j]);
|
|
if (j < N-1) fprintf(stdout, ","); else fprintf(stdout, "] %.1f ", gdop);
|
|
}
|
|
fprintf(stdout, "\n");
|
|
}
|
|
|
|
if (gpx->gps.opt_vergps == 2) {
|
|
gpx->lat = lat;
|
|
gpx->lon = lon;
|
|
gpx->alt = alt;
|
|
gpx->dop = gdop;
|
|
num = N;
|
|
|
|
if (gpx->gps.opt_vel) {
|
|
gpx->vH = vH;
|
|
gpx->vD = vD;
|
|
gpx->vU = vU;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
return num;
|
|
}
|
|
|
|
|
|
/* ------------------------------------------------------------------------------------ */
|
|
|
|
#define rs_N 255
|
|
#define rs_R 24
|
|
#define rs_K (rs_N-rs_R)
|
|
|
|
static int rs92_ecc(gpx_t *gpx, int msglen) {
|
|
|
|
int i, ret = 0;
|
|
int errors;
|
|
ui8_t cw[rs_N];
|
|
ui8_t err_pos[rs_R], err_val[rs_R];
|
|
|
|
memset(cw, 0, rs_N);
|
|
|
|
if (msglen > FRAME_LEN) msglen = FRAME_LEN;
|
|
for (i = msglen; i < FRAME_LEN; i++) gpx->frame[i] = 0;//xFF;
|
|
|
|
|
|
for (i = 0; i < rs_R; i++) cw[i] = gpx->frame[cfg_rs92.parpos+i];
|
|
for (i = 0; i < cfg_rs92.msglen; i++) cw[rs_R+i] = gpx->frame[cfg_rs92.msgpos+i];
|
|
|
|
errors = rs_decode(&gpx->RS, cw, err_pos, err_val);
|
|
|
|
//for (i = 0; i < cfg_rs92.hdrlen; i++) gpx->frame[i] = data[i];
|
|
for (i = 0; i < rs_R; i++) gpx->frame[cfg_rs92.parpos+i] = cw[i];
|
|
for (i = 0; i < cfg_rs92.msglen; i++) gpx->frame[cfg_rs92.msgpos+i] = cw[rs_R+i];
|
|
|
|
ret = errors;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------------------ */
|
|
|
|
static int print_position(gpx_t *gpx, int ec) { // GPS-Hoehe ueber Ellipsoid
|
|
int j, k, n = 0;
|
|
int err1, err2, err3, err4;
|
|
|
|
err1 = 0;
|
|
err1 |= get_FrameNb(gpx);
|
|
err1 |= get_SondeID(gpx);
|
|
err2 = get_PTU(gpx);
|
|
err3 = 0;
|
|
//err3 |= get_GPSweek();
|
|
err3 |= get_GPStime(gpx);
|
|
err4 = get_Aux(gpx);
|
|
|
|
if (!err3 && (gpx->gps.almanac || gpx->gps.ephem)) {
|
|
k = get_pseudorange(gpx);
|
|
if (k >= 4) {
|
|
n = get_GPSkoord(gpx, k);
|
|
}
|
|
}
|
|
|
|
if (!err1)
|
|
{
|
|
fprintf(stdout, "[%5d] ", gpx->frnr);
|
|
fprintf(stdout, "(%s) ", gpx->id);
|
|
|
|
if (!err3) {
|
|
if (gpx->gps.almanac || gpx->gps.ephem)
|
|
{
|
|
Gps2Date(gpx);
|
|
//fprintf(stdout, "(W %d) ", gpx->week);
|
|
fprintf(stdout, "(%04d-%02d-%02d) ", gpx->jahr, gpx->monat, gpx->tag);
|
|
}
|
|
fprintf(stdout, "%s ", weekday[gpx->wday]); // %04.1f: wenn sek >= 59.950, wird auf 60.0 gerundet
|
|
fprintf(stdout, "%02d:%02d:%06.3f", gpx->std, gpx->min, gpx->sek);
|
|
|
|
if (n > 0) {
|
|
fprintf(stdout, " ");
|
|
|
|
if (gpx->gps.almanac) fprintf(stdout, " lat: %.4f lon: %.4f alt: %.1f ", gpx->lat, gpx->lon, gpx->alt);
|
|
else fprintf(stdout, " lat: %.5f lon: %.5f alt: %.1f ", gpx->lat, gpx->lon, gpx->alt);
|
|
|
|
if (gpx->option.vbs && gpx->gps.opt_vergps != 8) {
|
|
fprintf(stdout, " (d:%.1f)", gpx->diter);
|
|
}
|
|
if (gpx->gps.opt_vel /*&& gpx->gps.opt_vergps >= 2*/) {
|
|
fprintf(stdout," vH: %4.1f D: %5.1f vV: %3.1f ", gpx->vH, gpx->vD, gpx->vU);
|
|
}
|
|
if (gpx->option.vbs) {
|
|
if (gpx->gps.opt_vergps != 2) {
|
|
fprintf(stdout, " DOP[%02d,%02d,%02d,%02d] %.1f",
|
|
gpx->sats[0], gpx->sats[1], gpx->sats[2], gpx->sats[3], gpx->dop);
|
|
}
|
|
else { // wenn gpx->gps.opt_vergps=2, dann n=N=k(-1)
|
|
fprintf(stdout, " DOP[");
|
|
for (j = 0; j < n; j++) {
|
|
fprintf(stdout, "%d", gpx->gps.prn[j]);
|
|
if (j < n-1) fprintf(stdout, ","); else fprintf(stdout, "] %.1f ", gpx->dop);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (gpx->option.aux) {
|
|
if (gpx->option.vbs != 4 && (gpx->crc & crc_AUX)==0 || !gpx->option.crc) {
|
|
if (gpx->aux[0] != 0 || gpx->aux[1] != 0 || gpx->aux[2] != 0 || gpx->aux[3] != 0) {
|
|
fprintf(stdout, " # %04x %04x %04x %04x", gpx->aux[0], gpx->aux[1], gpx->aux[2], gpx->aux[3]);
|
|
}
|
|
}
|
|
}
|
|
|
|
fprintf(stdout, " # ");
|
|
fprintf(stdout, "[");
|
|
for (j=0; j<4; j++) fprintf(stdout, "%d", (gpx->crc>>j)&1);
|
|
fprintf(stdout, "]");
|
|
if (gpx->option.ecc == 2) {
|
|
if (ec > 0) fprintf(stdout, " (%d)", ec);
|
|
if (ec < 0) fprintf(stdout, " (-)");
|
|
}
|
|
|
|
get_Cal(gpx);
|
|
/*
|
|
if (!err3) {
|
|
if (gpx->gps.opt_vergps == 8)
|
|
{
|
|
fprintf(stdout, "\n");
|
|
for (j = 0; j < 60; j++) { fprintf(stdout, "%d", prn_le[j]); if (j % 5 == 4) fprintf(stdout, " "); }
|
|
fprintf(stdout, ": ");
|
|
for (j = 0; j < 12; j++) fprintf(stdout, "%2d ", prns[j]);
|
|
fprintf(stdout, "\n");
|
|
fprintf(stdout, " status: ");
|
|
for (j = 0; j < 12; j++) fprintf(stdout, "%02X ", gpx->gps.sat_status[j]); //range[prns[j]].status
|
|
fprintf(stdout, "\n");
|
|
}
|
|
}
|
|
*/
|
|
|
|
if (gpx->option.jsn) {
|
|
// Print out telemetry data as JSON //even if we don't have a valid GPS lock
|
|
if ((gpx->crc & (crc_FRAME | crc_GPS))==0 && (gpx->gps.almanac || gpx->gps.ephem)) //(!err1 && !err3)
|
|
{ // eigentlich GPS, d.h. UTC = GPS - UTC_OFS (UTC_OFS=18sec ab 1.1.2017)
|
|
fprintf(stdout, "\n");
|
|
fprintf(stdout, "{ \"type\": \"%s\"", "RS92");
|
|
fprintf(stdout, ", \"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, gpx->id, gpx->jahr, gpx->monat, gpx->tag, gpx->std, gpx->min, gpx->sek, gpx->lat, gpx->lon, gpx->alt, gpx->vH, gpx->vD, gpx->vU);
|
|
if ((gpx->crc & crc_AUX)==0 && (gpx->aux[0] != 0 || gpx->aux[1] != 0 || gpx->aux[2] != 0 || gpx->aux[3] != 0)) {
|
|
fprintf(stdout, ", \"aux\": \"%04x%04x%04x%04x\"", gpx->aux[0], gpx->aux[1], gpx->aux[2], gpx->aux[3]);
|
|
}
|
|
fprintf(stdout, " }\n");
|
|
}
|
|
}
|
|
|
|
fprintf(stdout, "\n");
|
|
//if (gpx->gps.opt_vergps == 8) fprintf(stdout, "\n");
|
|
}
|
|
|
|
return err3;
|
|
}
|
|
|
|
static void print_frame(gpx_t *gpx, int len) {
|
|
int i, ec = 0;
|
|
ui8_t byte;
|
|
|
|
gpx->crc = 0;
|
|
|
|
if (gpx->option.ecc) {
|
|
ec = rs92_ecc(gpx, len);
|
|
}
|
|
|
|
for (i = len; i < FRAME_LEN; i++) {
|
|
gpx->frame[i] = 0;
|
|
}
|
|
|
|
if (gpx->option.raw) {
|
|
for (i = 0; i < len; i++) {
|
|
byte = gpx->frame[i];
|
|
fprintf(stdout, "%02x", byte);
|
|
}
|
|
if (gpx->option.ecc && gpx->option.vbs) {
|
|
fprintf(stdout, " ");
|
|
if (ec >= 0) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]");
|
|
if (ec > 0) fprintf(stdout, " (%d)", ec);
|
|
if (ec < 0) fprintf(stdout, " (-)");
|
|
}
|
|
fprintf(stdout, "\n");
|
|
// fprintf(stdout, "\n");
|
|
}
|
|
else print_position(gpx, ec);
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
|
|
int main(int argc, char *argv[]) {
|
|
|
|
FILE *fp, *fp_alm = NULL, *fp_eph = NULL;
|
|
char *fpname = NULL;
|
|
|
|
int option_der = 0; // linErr
|
|
int option_min = 0;
|
|
int option_iq = 0;
|
|
int option_lp = 0;
|
|
int option_dc = 0;
|
|
int option_softin = 0;
|
|
int option_pcmraw = 0;
|
|
int sel_wavch = 0; // audio channel: left
|
|
int spike = 0;
|
|
int fileloaded = 0;
|
|
|
|
char bitbuf[BITS];
|
|
int bitpos = 0,
|
|
b8pos = 0,
|
|
byte_count = FRAMESTART;
|
|
int bit, byte;
|
|
int bitQ;
|
|
int herrs, herr1;
|
|
int headerlen = 0;
|
|
|
|
int k;
|
|
|
|
int header_found = 0;
|
|
|
|
float thres = 0.7;
|
|
float _mv = 0.0;
|
|
|
|
int symlen = 2;
|
|
int bitofs = 2; // +0 .. +3
|
|
int shift = 0;
|
|
|
|
pcm_t pcm = {0};
|
|
dsp_t dsp = {0}; //memset(&dsp, 0, sizeof(dsp));
|
|
|
|
hdb_t hdb = {0};
|
|
|
|
gpx_t gpx = {0};
|
|
|
|
gpx.gps.prn32toggle = 0x1;
|
|
gpx.gps.dop_limit = 9.9;
|
|
gpx.gps.d_err = 10000;
|
|
gpx.gps.exSat = -1;
|
|
gpx.gps.WEEK1024epoch = 1; // SEM almanac, GPS epoch (1: 1999-2019)
|
|
|
|
|
|
#ifdef CYGWIN
|
|
_setmode(_fileno(stdin), _O_BINARY);
|
|
#endif
|
|
setbuf(stdout, NULL);
|
|
|
|
|
|
fpname = argv[0];
|
|
++argv;
|
|
while ((*argv) && (!fileloaded)) {
|
|
if ( (strcmp(*argv, "-h") == 0) || (strcmp(*argv, "--help") == 0) ) {
|
|
fprintf(stderr, "%s [options] <file>\n", fpname);
|
|
fprintf(stderr, " file: audio.wav or raw_data\n");
|
|
fprintf(stderr, " options:\n");
|
|
fprintf(stderr, " --vel; --vel1, --vel2 (-g2)\n");
|
|
fprintf(stderr, " -v, -vx, -vv\n");
|
|
fprintf(stderr, " -r, --raw\n");
|
|
fprintf(stderr, " -i, --invert\n");
|
|
fprintf(stderr, " -e, --ephem <ephemperisRinex>\n");
|
|
fprintf(stderr, " -a, --almanac <almanacSEM>\n");
|
|
fprintf(stderr, " --gpsepoch <n> (2019-04-07: n=2)\n");
|
|
fprintf(stderr, " -g1 (verbose GPS: 4 sats)\n");
|
|
fprintf(stderr, " -g2 (verbose GPS: all sats)\n");
|
|
fprintf(stderr, " -gg (vverbose GPS)\n");
|
|
fprintf(stderr, " --crc (CRC check GPS)\n");
|
|
fprintf(stderr, " --ecc (Reed-Solomon)\n");
|
|
fprintf(stderr, " --ths <x> (peak threshold; default=%.1f)\n", thres);
|
|
fprintf(stderr, " --json (JSON output)\n");
|
|
return 0;
|
|
}
|
|
else if ( (strcmp(*argv, "--vel") == 0) ) {
|
|
gpx.gps.opt_vel = 4;
|
|
}
|
|
else if ( (strcmp(*argv, "--vel1") == 0) ) {
|
|
gpx.gps.opt_vel = 1;
|
|
if (gpx.gps.opt_vergps < 1) gpx.gps.opt_vergps = 2;
|
|
}
|
|
else if ( (strcmp(*argv, "--vel2") == 0) ) {
|
|
gpx.gps.opt_vel = 2;
|
|
if (gpx.gps.opt_vergps < 1) gpx.gps.opt_vergps = 2;
|
|
}
|
|
else if ( (strcmp(*argv, "--iter") == 0) ) {
|
|
gpx.gps.opt_iter = 1;
|
|
}
|
|
else if ( (strcmp(*argv, "-v") == 0) ) { gpx.option.vbs = 1; }
|
|
else if ( (strcmp(*argv, "-vv") == 0) ) { gpx.option.vbs = 4; }
|
|
else if ( (strcmp(*argv, "-vx") == 0) ) { gpx.option.aux = 1; }
|
|
else if (strcmp(*argv, "--crc") == 0) { gpx.option.crc = 1; }
|
|
else if (strcmp(*argv, "--ecc") == 0) { gpx.option.ecc = 1; }
|
|
else if (strcmp(*argv, "--ecc2") == 0) { gpx.option.ecc = 2; }
|
|
else if ( (strcmp(*argv, "-r") == 0) || (strcmp(*argv, "--raw") == 0) ) {
|
|
gpx.option.raw = 1;
|
|
}
|
|
else if ( (strcmp(*argv, "-i") == 0) || (strcmp(*argv, "--invert") == 0) ) {
|
|
gpx.option.inv = 1;
|
|
}
|
|
else if ( (strcmp(*argv, "-e") == 0) || (strncmp(*argv, "--ephem", 7) == 0) ) {
|
|
++argv;
|
|
if (*argv) fp_eph = fopen(*argv, "rb"); // bin-mode
|
|
else return -1;
|
|
if (fp_eph == NULL) fprintf(stderr, "[rinex] %s konnte nicht geoeffnet werden\n", *argv);
|
|
}
|
|
else if ( (strcmp(*argv, "-a") == 0) || (strcmp(*argv, "--almanac") == 0) ) {
|
|
++argv;
|
|
if (*argv) fp_alm = fopen(*argv, "r"); // txt-mode
|
|
else return -1;
|
|
if (fp_alm == NULL) fprintf(stderr, "[almanac] %s konnte nicht geoeffnet werden\n", *argv);
|
|
}
|
|
else if ( strcmp(*argv, "--gpsepoch") == 0 ) { // SEM almanac, GPS week: 10 bit
|
|
++argv; // GPS epoch (default: 1)
|
|
if (*argv) { // 2019-04-07: rollover 1 -> 2
|
|
int gpsepoch = atoi(*argv);
|
|
if (gpsepoch < 0 || gpsepoch > 4) gpsepoch = 1;
|
|
gpx.gps.WEEK1024epoch = gpsepoch;
|
|
}
|
|
else return -1;
|
|
}
|
|
else if ( (strcmp(*argv, "--dop") == 0) ) {
|
|
++argv;
|
|
if (*argv) {
|
|
gpx.gps.dop_limit = atof(*argv);
|
|
if (gpx.gps.dop_limit <= 0 || gpx.gps.dop_limit >= 100) gpx.gps.dop_limit = 9.9;
|
|
}
|
|
else return -1;
|
|
}
|
|
else if ( (strcmp(*argv, "--der") == 0) ) {
|
|
++argv;
|
|
if (*argv) {
|
|
gpx.gps.d_err = atof(*argv);
|
|
if (gpx.gps.d_err <= 0 || gpx.gps.d_err >= 100000) gpx.gps.d_err = 10000;
|
|
else option_der = 1;
|
|
}
|
|
else return -1;
|
|
}
|
|
else if ( (strcmp(*argv, "--exsat") == 0) ) {
|
|
++argv;
|
|
if (*argv) {
|
|
gpx.gps.exSat = atoi(*argv);
|
|
if (gpx.gps.exSat < 1 || gpx.gps.exSat > 32) gpx.gps.exSat = -1;
|
|
}
|
|
else return -1;
|
|
}
|
|
else if (strcmp(*argv, "-g1") == 0) { gpx.gps.opt_vergps = 1; } // verbose1 GPS
|
|
else if (strcmp(*argv, "-g2") == 0) { gpx.gps.opt_vergps = 2; } // verbose2 GPS (bancroft)
|
|
else if (strcmp(*argv, "-gg") == 0) { gpx.gps.opt_vergps = 8; } // vverbose GPS
|
|
else if (strcmp(*argv, "--json") == 0) {
|
|
gpx.option.jsn = 1;
|
|
gpx.option.ecc = 2;
|
|
gpx.option.crc = 1;
|
|
gpx.gps.opt_vel = 4;
|
|
}
|
|
else if (strcmp(*argv, "--spike") == 0) { spike = 1; }
|
|
else if (strcmp(*argv, "--ch2") == 0) { sel_wavch = 1; } // right channel (default: 0=left)
|
|
else if (strcmp(*argv, "--softin") == 0) { option_softin = 1; } // float32 soft input
|
|
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, "--ngp") == 0) { gpx.option.ngp = 1; } // RS92-NGP, RS92-D: 1680 MHz
|
|
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;
|
|
}
|
|
fileloaded = 1;
|
|
}
|
|
++argv;
|
|
}
|
|
if (!fileloaded) fp = stdin;
|
|
|
|
if (fp_alm) {
|
|
if (read_SEMalmanac(fp_alm, gpx.gps.alm) == 0) {
|
|
gpx.gps.almanac = 1;
|
|
}
|
|
fclose(fp_alm);
|
|
if (!option_der) gpx.gps.d_err = 4000;
|
|
}
|
|
if (fp_eph) {
|
|
/* i = read_RNXephemeris(fp_eph, eph);
|
|
if (i == 0) {
|
|
gpx.gps.ephem = 1;
|
|
gpx.gps.almanac = 0;
|
|
}
|
|
fclose(fp_eph); */
|
|
gpx.gps.ephs = read_RNXpephs(fp_eph);
|
|
if (gpx.gps.ephs) {
|
|
gpx.gps.ephem = 1;
|
|
gpx.gps.almanac = 0;
|
|
}
|
|
fclose(fp_eph);
|
|
if (!option_der) gpx.gps.d_err = 1000;
|
|
}
|
|
|
|
|
|
if (gpx.option.ecc) {
|
|
rs_init_RS255(&gpx.RS);
|
|
}
|
|
|
|
// init gpx
|
|
memcpy(gpx.frame, rs92_header_bytes, sizeof(rs92_header_bytes)); // 6 header bytes
|
|
|
|
|
|
#ifdef EXT_FSK
|
|
if (!option_softin) {
|
|
option_softin = 1;
|
|
fprintf(stderr, "reading float32 soft symbols\n");
|
|
}
|
|
#endif
|
|
|
|
if (!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;
|
|
}
|
|
}
|
|
|
|
// rs92-sgp: BT=0.5, h=1.0 ?
|
|
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 = rs92_rawheader;
|
|
dsp.hdrlen = strlen(rs92_rawheader);
|
|
dsp.BT = 0.5; // bw/time (ISI) // 0.3..0.5
|
|
dsp.h = 0.8; // 1.0 modulation index abzgl. BT
|
|
dsp.opt_iq = option_iq;
|
|
dsp.opt_lp = option_lp;
|
|
dsp.lpIQ_bw = 8e3; // IF lowpass bandwidth
|
|
dsp.lpFM_bw = 6e3; // FM audio lowpass
|
|
dsp.opt_dc = option_dc;
|
|
dsp.opt_IFmin = option_min;
|
|
if (gpx.option.ngp) { // L-band rs92-ngp
|
|
dsp.h = 3.8; // RS92-NGP: 1680/400=4.2, 4.2*0.9=3.8=4.75*0.8
|
|
dsp.lpIQ_bw = 32e3; // IF lowpass bandwidth // 32e3=4.2*7.6e3
|
|
}
|
|
|
|
if ( dsp.sps < 8 ) {
|
|
fprintf(stderr, "note: sample rate low (%.1f sps)\n", dsp.sps);
|
|
}
|
|
|
|
|
|
k = init_buffers(&dsp); // BT=0.5 (IQ-Int: BT > 0.5 ?)
|
|
if ( k < 0 ) {
|
|
fprintf(stderr, "error: init buffers\n");
|
|
return -1;
|
|
};
|
|
|
|
bitofs += shift;
|
|
}
|
|
else {
|
|
// init circular header bit buffer
|
|
hdb.hdr = rs92_rawheader;
|
|
hdb.len = strlen(rs92_rawheader);
|
|
//hdb.thb = 1.0 - 3.1/(float)hdb.len; // 1.0-max_bit_errors/hdrlen
|
|
hdb.bufpos = -1;
|
|
hdb.buf = NULL;
|
|
/*
|
|
calloc(hdb.len, sizeof(char));
|
|
if (hdb.buf == NULL) {
|
|
fprintf(stderr, "error: malloc\n");
|
|
return -1;
|
|
}
|
|
*/
|
|
// caution ths=0.7: -3 byte offset, false positive
|
|
// 2A 2A 2A 2A 2A 10|65 10 ..
|
|
// header sync could be extended into the frame
|
|
hdb.ths = 0.8;
|
|
hdb.sbuf = calloc(hdb.len, sizeof(float));
|
|
if (hdb.sbuf == NULL) {
|
|
fprintf(stderr, "error: malloc\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
|
|
while ( 1 )
|
|
{
|
|
if (option_softin) {
|
|
for (k = 0; k < hdb.len; k++) hdb.sbuf[k] = 0.0;
|
|
header_found = find_softbinhead(fp, &hdb, &_mv);
|
|
}
|
|
else {
|
|
header_found = find_header(&dsp, thres, 3, bitofs, dsp.opt_dc);
|
|
_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) {
|
|
|
|
byte_count = FRAMESTART;
|
|
bitpos = 0;
|
|
b8pos = 0;
|
|
|
|
while ( byte_count < FRAME_LEN ) {
|
|
|
|
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
|
|
bit = (s>=0.0); // no soft decoding
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
float bl = -1;
|
|
if (option_iq > 2) bl = 4.0;
|
|
bitQ = read_slbit(&dsp, &bit, 0, bitofs, bitpos, bl, spike); // symlen=2
|
|
}
|
|
if ( bitQ == EOF) break;
|
|
|
|
if (gpx.option.inv) bit ^= 1;
|
|
|
|
bitpos += 1;
|
|
bitbuf[b8pos] = bit;
|
|
b8pos++;
|
|
if (b8pos >= BITS) {
|
|
b8pos = 0;
|
|
byte = bits2byte(bitbuf);
|
|
gpx.frame[byte_count] = byte;
|
|
byte_count++;
|
|
}
|
|
}
|
|
header_found = 0;
|
|
print_frame(&gpx, byte_count);
|
|
byte_count = FRAMESTART;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
if (!option_softin) free_buffers(&dsp);
|
|
else {
|
|
if (hdb.buf) { free(hdb.buf); hdb.buf = NULL; }
|
|
}
|
|
|
|
if (gpx.gps.ephs) free(gpx.gps.ephs);
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|