kopia lustrzana https://github.com/rs1729/RS
675 wiersze
17 KiB
C
675 wiersze
17 KiB
C
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/*
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* radiosonde iMet-1-AB (GPS: Trimble/ublox)
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* author: zilog80
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* usage:
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* gcc imet1ab.c -lm -o imet1ab
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* ./imet1ab [options] audio.wav
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* options:
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* -r, --raw
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* -i, --invert
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* -1 (trimble: TOW/s)
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* -2 (ublox: TOW/ms)
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*/
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#include <stdio.h>
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#include <math.h>
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#include <string.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 struct {
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int frnr;
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char id1[9]; char id2[9];
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int week; double 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; int sek; int ms;
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double lat; double lon; double alt;
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double vH; double vD; double vV;
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double vx; double vy; double vD2;
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} gpx_t;
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gpx_t gpx;
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int option_verbose = 0, // ausfuehrliche Anzeige
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option_raw = 0, // rohe Frames
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option_color = 0, // Farbe
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option_inv = 0, // invertiert Signal
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option_gps = 0,
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wavloaded = 0;
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/* -------------------------------------------------------------------------- */
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#define BAUD_RATE 2400
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// iMet: AFSK Baudrate 2400
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/* 1200 Hz: out-in
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2400 Hz: lang -> Baudrate
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4800 Hz: kurz (2x)
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*/
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int sample_rate = 0, bits_sample = 0, channels = 0;
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float samples_per_bit = 0;
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int findstr(char *buff, char *str, int pos) {
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int i;
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for (i = 0; i < 4; i++) {
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if (buff[(pos+i)%4] != str[i]) break;
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}
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return i;
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}
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int read_wav_header(FILE *fp) {
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char txt[4+1] = "\0\0\0\0";
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unsigned char dat[4];
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int byte, p=0;
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if (fread(txt, 1, 4, fp) < 4) return -1;
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if (strncmp(txt, "RIFF", 4)) return -1;
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if (fread(txt, 1, 4, fp) < 4) return -1;
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// pos_WAVE = 8L
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if (fread(txt, 1, 4, fp) < 4) return -1;
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if (strncmp(txt, "WAVE", 4)) return -1;
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// pos_fmt = 12L
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for ( ; ; ) {
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if ( (byte=fgetc(fp)) == EOF ) return -1;
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txt[p % 4] = byte;
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p++; if (p==4) p=0;
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if (findstr(txt, "fmt ", p) == 4) break;
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}
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if (fread(dat, 1, 4, fp) < 4) return -1;
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if (fread(dat, 1, 2, fp) < 2) return -1;
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if (fread(dat, 1, 2, fp) < 2) return -1;
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channels = dat[0] + (dat[1] << 8);
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if (fread(dat, 1, 4, fp) < 4) return -1;
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memcpy(&sample_rate, dat, 4); //sample_rate = dat[0]|(dat[1]<<8)|(dat[2]<<16)|(dat[3]<<24);
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if (fread(dat, 1, 4, fp) < 4) return -1;
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if (fread(dat, 1, 2, fp) < 2) return -1;
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//byte = dat[0] + (dat[1] << 8);
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if (fread(dat, 1, 2, fp) < 2) return -1;
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bits_sample = dat[0] + (dat[1] << 8);
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// pos_dat = 36L + info
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for ( ; ; ) {
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if ( (byte=fgetc(fp)) == EOF ) return -1;
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txt[p % 4] = byte;
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p++; if (p==4) p=0;
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if (findstr(txt, "data", p) == 4) break;
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}
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if (fread(dat, 1, 4, fp) < 4) return -1;
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fprintf(stderr, "sample_rate: %d\n", sample_rate);
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fprintf(stderr, "bits : %d\n", bits_sample);
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fprintf(stderr, "channels : %d\n", channels);
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if ((bits_sample != 8) && (bits_sample != 16)) return -1;
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samples_per_bit = sample_rate/(float)BAUD_RATE;
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fprintf(stderr, "samples/bit: %.2f\n", samples_per_bit);
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return 0;
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}
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#define EOF_INT 0x1000000
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int read_signed_sample(FILE *fp) { // int = i32_t
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int byte, i, ret; // EOF -> 0x1000000
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for (i = 0; i < channels; i++) {
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// i = 0: links bzw. mono
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byte = fgetc(fp);
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if (byte == EOF) return EOF_INT;
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if (i == 0) ret = byte;
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if (bits_sample == 16) {
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byte = fgetc(fp);
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if (byte == EOF) return EOF_INT;
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if (i == 0) ret += byte << 8;
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}
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}
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if (bits_sample == 8) return ret-128;
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if (bits_sample == 16) return (short)ret;
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return ret;
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}
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int par=1, // init_sample > 0
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par_alt=1;
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unsigned long sample_count = 0;
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int read_afsk_bits(FILE *fp, int *len) {
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int n, sample;
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float l;
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n = 0;
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do{ // High // par>0
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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if (option_inv) sample = -sample;
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sample_count++;
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par_alt = par;
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par = (sample >= 0) ? 1 : -1;
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n++;
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} while (par*par_alt > 0);
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do{ // Low // par<0
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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if (option_inv) sample = -sample;
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sample_count++;
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par_alt = par;
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par = (sample >= 0) ? 1 : -1;
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n++;
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} while (par*par_alt > 0); // par>0
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l = (float)n / (samples_per_bit/2.0);
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*len = (int)(l+0.5); // round(l)
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return 0;
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}
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int read_afsk_bits1(FILE *fp, int *len) {
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int n; static int sample;
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float l;
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while (sample >= 0) {
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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if (option_inv) sample = -sample;
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sample_count++;
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}
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n = 0;
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while (sample < 0) {
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n++;
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par_alt = par;
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par = (sample >= 0) ? 1 : -1;
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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if (option_inv) sample = -sample;
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sample_count++;
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}
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while (sample >= 0) {
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n++;
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par_alt = par;
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par = (sample >= 0) ? 1 : -1;
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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if (option_inv) sample = -sample;
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sample_count++;
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}
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l = (float)n / (samples_per_bit/2.0);
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*len = (int)(l+0.5); // round(l)
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return 0;
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}
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/* -------------------------------------------------------------------------- */
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/*
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Beginn/Header:
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69 69 69 69 69 10
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Ende:
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96 96 96 96 96 96 96 96 96
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*/
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#define pos_Start 0x05 // 2 byte
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#define pos_RecordNo 0x08 // 2 byte
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#define pos_SondeID1 0x12 // 5 byte
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#define pos_SondeID2 0x2C // 5 byte
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#define pos_GPSTOW 0x8A // 4 byte
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#define pos_GPSlat 0x8E // 4 byte
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#define pos_GPSlon 0x92 // 4 byte
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#define pos_GPSalt 0x96 // 4 byte
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//Velocity East-North-Up (ENU)
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#define pos_GPSvO 0x84 // 2 byte
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#define pos_GPSvN 0x86 // 2 byte
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#define pos_GPSvV 0x88 // 2 byte
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#define pos_xcSum 0xC2 // 1 byte: xsumDLE(frame+pos_Start, 189)
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// 189 = pos_xcSum-pos_Start
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#define FRAMELEN 204
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ui8_t frame[FRAMELEN+6];
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double B60B60 = 0xB60B60; // 2^32/360 = 0xB60B60.xxx
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char weekday[7][3] = { "So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"};
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typedef struct {
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int cnt;
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int tow;
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} gpstow_t;
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gpstow_t tow0, tow1;
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int gpsTOW(int gpstime) {
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int day;
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tow0 = tow1;
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tow1.tow = gpstime;
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tow1.cnt = gpx.frnr;
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if (!option_gps) {
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if (tow1.cnt-tow0.cnt == 1) {
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if (tow1.tow-tow0.tow > 998 && tow1.tow-tow0.tow < 1002) option_gps = 2;
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if (tow1.tow-tow0.tow > 0 && tow1.tow-tow0.tow < 2 ) option_gps = 1;
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}
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}
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gpx.gpssec = gpstime;
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if (option_gps == 2) {
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gpx.ms = gpstime % 1000;
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gpx.gpssec /= 1000.0;
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gpstime /= 1000;
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}
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if (gpx.gpssec<0 || gpx.gpssec>7*24*60*60) return 1; // 1 Woche = 604800 sek
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day = gpstime / (24 * 3600);
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gpstime %= (24*3600);
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if ((day < 0) || (day > 6)) {
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//gpx.wday = 0;
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return 1;
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}
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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;
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return 0;
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}
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int gpsLat(int lat) {
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gpx.lat = lat / B60B60;
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if (gpx.lat < -90 || gpx.lat > 90) return 1;
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return 0;
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}
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int gpsLon(int lon) {
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gpx.lon = lon / B60B60;
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if (gpx.lon < -180 || gpx.lon > 180) return 1;
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return 0;
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}
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int gpsAlt(int alt) {
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gpx.alt = alt / 1000.0;
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if (gpx.alt < -200 || gpx.alt > 50000) return 1;
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return 0;
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}
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int get_GPStow() {
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int i, tow;
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int err = 0;
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tow = 0;
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for (i = 0; i < 4; i++) {
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tow |= frame[pos_GPSTOW+i] << (8*i);
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}
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err = gpsTOW(tow);
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return err;
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}
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int get_GPSpos() {
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int i, lat, lon, alt;
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int err = 0;
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lat = lon = alt = 0;
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for (i = 0; i < 4; i++) {
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lat |= frame[pos_GPSlat+i] << (8*i);
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lon |= frame[pos_GPSlon+i] << (8*i);
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alt |= frame[pos_GPSalt+i] << (8*i);
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}
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err = 0;
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err |= gpsLat(lat) << 1;
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err |= gpsLon(lon) << 2;
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err |= gpsAlt(alt) << 3;
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return err;
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}
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int get_GPSvel() {
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int i;
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unsigned byte;
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ui8_t gpsVel_bytes[2];
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short vel16;
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double vx, vy, dir, alpha;
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const double ms2kn100 = 2e2; // m/s -> knots: 1 m/s = 3.6/1.852 kn = 1.94 kn
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for (i = 0; i < 2; i++) {
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byte = frame[pos_GPSvO + i];
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if (byte > 0xFF) return -1;
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gpsVel_bytes[i] = byte;
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}
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vel16 = gpsVel_bytes[0] | gpsVel_bytes[1] << 8;
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vx = vel16 / ms2kn100; // ost
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for (i = 0; i < 2; i++) {
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byte = frame[pos_GPSvN + i];
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if (byte > 0xFF) return -1;
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gpsVel_bytes[i] = byte;
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}
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vel16 = gpsVel_bytes[0] | gpsVel_bytes[1] << 8;
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vy= vel16 / ms2kn100; // nord
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gpx.vx = vx;
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gpx.vy = vy;
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gpx.vH = sqrt(vx*vx+vy*vy);
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///*
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alpha = atan2(vy, vx)*180/M_PI; // ComplexPlane (von x-Achse nach links) - GeoMeteo (von y-Achse nach rechts)
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dir = 90-alpha; // z=x+iy= -> i*conj(z)=y+ix=re(i(pi/2-t)), Achsen und Drehsinn vertauscht
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if (dir < 0) dir += 360; // atan2(y,x)=atan(y/x)=pi/2-atan(x/y) , atan(1/t) = pi/2 - atan(t)
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gpx.vD2 = dir;
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//*/
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dir = atan2(vx, vy) * 180 / M_PI;
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if (dir < 0) dir += 360;
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gpx.vD = dir;
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for (i = 0; i < 2; i++) {
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byte = frame[pos_GPSvV + i];
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if (byte > 0xFF) return -1;
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gpsVel_bytes[i] = byte;
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}
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vel16 = gpsVel_bytes[0] | gpsVel_bytes[1] << 8;
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gpx.vV = vel16 / ms2kn100;
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return 0;
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}
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int get_RecordNo() {
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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 = frame[pos_RecordNo + 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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int get_SondeID() {
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int i;
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unsigned byte;
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ui8_t sondeid_bytes[8]; // 5 bis 6 ascii + '\0'
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int IDlen = 6+1; // < 9
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int err = 0;
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for (i = 0; i < IDlen; i++) {
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byte = frame[pos_SondeID1 + i];
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if (byte == 0) IDlen = i+1;
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else
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if (byte < 0x20 || byte > 0x7E) err |= 0x1;
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sondeid_bytes[i] = byte;
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}
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for (i = 0; i < IDlen; i++) {
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gpx.id1[i] = sondeid_bytes[i];
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}
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IDlen = 6+1;
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for (i = 0; i < IDlen; i++) {
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byte = frame[pos_SondeID2 + i];
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if (byte == 0) IDlen = i+1;
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else
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if (byte < 0x20 || byte > 0x7E) err |= 0x2;
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sondeid_bytes[i] = byte;
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}
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for (i = 0; i < IDlen; i++) {
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gpx.id2[i] = sondeid_bytes[i];
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}
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return err;
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}
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/* -------------------------------------------------------------------------- */
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// Frame: <DLE><id><data_bytes><DLE><ETX>,
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// <DLE>=0x10, <ETX>=0x03; <id>=0xb9
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// (.. 69) 10 b9 01 .. .. 10 03 cs (96 ..)
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// 8bit-xor-checksum:
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// xsumDLE(frame+pos_Start, pos_xcSum-pos_Start)
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int xsumDLE(ui8_t bytes[], int len) {
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int i, xsum = 0;
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for (i = 0; i < len; i++) { // TSIP-Protokoll: <DLE>=0x10
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// innnerhalb <DLE>, 0x10 doppelt, und 0x10^0x10=0x00
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if (bytes[i] != 0x10) xsum ^= bytes[i];
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// ausser <DLE> zu Beginn/Ende
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}
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return xsum & 0xFF;
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}
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/* -------------------------------------------------------------------------- */
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int bits2byte(char *bits) {
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int i, d = 1, byte = 0;
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for (i = 0; i < 8; i++) {
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if (bits[i] == 1) byte += d;
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else if (bits[i] == 0) byte += 0;
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d <<= 1;
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}
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return byte & 0xFF;
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}
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#define ANSI_COLOR_CYAN "\x1b[36m"
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#define ANSI_COLOR_RESET "\x1b[0m"
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void print_frame(int len) {
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FILE *fp;
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int i;
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int err1, err2, err3;
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if (option_raw) {
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for (i = 0; i < len; i++) {
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if (option_color) {
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if (i >= pos_GPSTOW && i < pos_GPSalt+4) fprintf(stdout, ANSI_COLOR_CYAN);
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else fprintf(stdout, ANSI_COLOR_RESET);
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}
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fprintf(stdout, "%02x ", frame[i]);
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}
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if (option_verbose) { // pos_xcSum-pos_Start=189
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fprintf(stdout, " [%02X # %02X]", frame[pos_xcSum], xsumDLE(frame+pos_Start, pos_xcSum-pos_Start));
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}
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fprintf(stdout, "\n");
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}
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else {
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fp = stdout;
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get_RecordNo();
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err1 = get_SondeID();
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err2 = get_GPStow();
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err3 = get_GPSpos();
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if ( !err1 || !err2 || !err3 ) {
|
|
fprintf(fp, "[%5d] ", gpx.frnr);
|
|
if ( err1!=0x3 ) {
|
|
fprintf(fp, "(%s) ", err1&0x1?gpx.id2:gpx.id1);
|
|
}
|
|
if ( !err2 ) {
|
|
fprintf(fp, "%s ",weekday[gpx.wday]);
|
|
fprintf(fp, "%02d:%02d:%02d", gpx.std, gpx.min, gpx.sek);
|
|
if (option_gps == 2) fprintf(fp, ".%03d", gpx.ms);
|
|
fprintf(fp, " ");
|
|
}
|
|
if ( !err3 ) {
|
|
fprintf(fp, " lat: %.6f ", gpx.lat);
|
|
fprintf(fp, " lon: %.6f ", gpx.lon);
|
|
fprintf(fp, " alt: %.2f ", gpx.alt);
|
|
if (option_verbose) {
|
|
err3 = get_GPSvel();
|
|
if (!err3) {
|
|
if (option_verbose == 2) fprintf(fp, " (%.1f , %.1f : %.1f°) ", gpx.vx, gpx.vy, gpx.vD2);
|
|
fprintf(fp, " vH: %.1f D: %.1f° vV: %.1f ", gpx.vH, gpx.vD, gpx.vV);
|
|
}
|
|
}
|
|
}
|
|
fprintf(fp, "\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
FILE *fp;
|
|
char *fpname;
|
|
int i, len;
|
|
char bitbuf[8];
|
|
|
|
int bitl1 = 0,
|
|
bitl2 = 0,
|
|
bitl4 = 0,
|
|
bytepos = 0,
|
|
bitpos = 0,
|
|
head = 0,
|
|
inout = 0,
|
|
byteval = 0;
|
|
|
|
#ifdef CYGWIN
|
|
_setmode(fileno(stdin), _O_BINARY); // _setmode(_fileno(stdin), _O_BINARY);
|
|
#endif
|
|
setbuf(stdout, NULL);
|
|
|
|
fpname = argv[0];
|
|
++argv;
|
|
while ((*argv) && (!wavloaded)) {
|
|
if ( (strcmp(*argv, "-h") == 0) || (strcmp(*argv, "--help") == 0) ) {
|
|
fprintf(stderr, "%s [options] audio.wav\n", fpname);
|
|
fprintf(stderr, " options:\n");
|
|
fprintf(stderr, " -r, --raw\n");
|
|
fprintf(stderr, " -i, --invert\n");
|
|
fprintf(stderr, " -v, --verbose\n");
|
|
fprintf(stderr, " -1 (v1: TOW/s)\n");
|
|
fprintf(stderr, " -2 (v2: TOW/ms)\n");
|
|
return 0;
|
|
}
|
|
else if ( (strcmp(*argv, "-v") == 0) || (strcmp(*argv, "--verbose") == 0) ) {
|
|
option_verbose = 1;
|
|
}
|
|
else if (strcmp(*argv, "-vv") == 0) { option_verbose = 2; }
|
|
else if ( (strcmp(*argv, "-r") == 0) || (strcmp(*argv, "--raw") == 0) ) {
|
|
option_raw = 1;
|
|
}
|
|
else if ( (strcmp(*argv, "-c") == 0) || (strcmp(*argv, "--color") == 0) ) {
|
|
option_color = 1;
|
|
}
|
|
else if ( (strcmp(*argv, "-i") == 0) || (strcmp(*argv, "--invert") == 0) ) {
|
|
option_inv = 1;
|
|
}
|
|
else if ( (strcmp(*argv, "-1") == 0) ) { option_gps = 1; } // Trimble
|
|
else if ( (strcmp(*argv, "-2") == 0) ) { option_gps = 2; } // ublox
|
|
else {
|
|
fp = fopen(*argv, "rb");
|
|
if (fp == NULL) {
|
|
fprintf(stderr, "%s konnte nicht geoeffnet werden\n", *argv);
|
|
return -1;
|
|
}
|
|
wavloaded = 1;
|
|
}
|
|
++argv;
|
|
}
|
|
if (!wavloaded) fp = stdin;
|
|
|
|
i = read_wav_header(fp);
|
|
if (i) {
|
|
fclose(fp);
|
|
return -1;
|
|
}
|
|
|
|
|
|
bitl1 = 0;
|
|
bitl2 = 0;
|
|
bitl4 = 0;
|
|
bytepos = 0;
|
|
bitpos = 0;
|
|
head = 0;
|
|
|
|
while (!read_afsk_bits(fp, &len)) {
|
|
|
|
if (len == 0) continue;
|
|
|
|
if (len == 1) {
|
|
bitl1++;
|
|
if (bitl1 < 2) continue;
|
|
}
|
|
if (len == 2) bitl2++;
|
|
if (len == 4) {
|
|
bitl4++;
|
|
inout = 1;
|
|
bitl1 = 0;
|
|
bitl2 = 0;
|
|
}
|
|
|
|
if (len == 3) {
|
|
if (bitl1 == 1 && bitpos < 7) {
|
|
bitl1 = 0; bitbuf[bitpos++] = 1;
|
|
bitl2++;
|
|
len = 2;
|
|
}
|
|
}
|
|
|
|
if (len > 0 && len < 3) {
|
|
bitl4 = 0;
|
|
inout = 0;
|
|
if (head > 0) {
|
|
head = 0;
|
|
if (bytepos > pos_GPSalt+4) print_frame(FRAMELEN);
|
|
bitpos = 0;
|
|
bytepos = 0;
|
|
for (i=0; i<FRAMELEN; i++) frame[i] = 0;
|
|
}
|
|
}
|
|
|
|
if (bitl1 == 2) { bitl1 = 0; bitbuf[bitpos++] = 1; }
|
|
if (bitl2 == 1) { bitl2 = 0; bitbuf[bitpos++] = 0; }
|
|
|
|
if (bitpos > 7 || inout) {
|
|
if (bitpos > 2) {
|
|
if (bytepos < FRAMELEN) {
|
|
byteval = bits2byte(bitbuf);
|
|
if (byteval == 0x10 && frame[bytepos-1] == 0x10) frame[bytepos-1] = 0x10;
|
|
else { // woher die doppelte 0x10?
|
|
frame[bytepos] = byteval & 0xFF; // koennte vom TSIP-Protokoll kommen:
|
|
bytepos++; // <DLE><id><data_bytes><DLE><ETX>,
|
|
} // wobei <DLE>=0x10, <ETX>=0x03.
|
|
} // wenn 0x10 in data, dann doppelt.
|
|
|
|
}
|
|
bitpos = 0;
|
|
}
|
|
|
|
if (bitl4 > 2) { head = 1; }
|
|
|
|
}
|
|
printf("\n");
|
|
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
|