kopia lustrzana https://github.com/rs1729/RS
645 wiersze
20 KiB
C
645 wiersze
20 KiB
C
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/*
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* big endian forest
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*
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* Meisei radiosondes
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* author: zilog80
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*
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*/
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/*
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PCM-FM, 1200 baud biphase-S
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1200 bit pro Sekunde: zwei Frames, die wiederum in zwei Subframes unterteilt werden koennen, d.h. 4 mal 300 bit.
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Variante 1 (RS-11G ?)
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<option -1>
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049DCE1C667FDD8F537C8100004F20764630A20000000010040436 FB623080801F395FFE08A76540000FE01D0C2C1E75025006DE0A07
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049DCE1C67008C73D7168200004F0F764B31A2FFFF000010270B14 FB6230000000000000000000000000000000000000000000001D59
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0x00..0x02 HEADER 0x049DCE
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0x03..0x04 16 bit 0.5s-counter, count%2=0:
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0x1B..0x1D HEADER 0xFB6230
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0x20..0x23 32 bit GPS-lat * 1e7 (DD.dddddd)
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0x24..0x27 32 bit GPS-lon * 1e7 (DD.dddddd)
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0x28..0x2B 32 bit GPS-alt * 1e2 (m)
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0x32..0x35 32 bit date jjJJMMTT
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0x00..0x02 HEADER 0x049DCE
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0x03..0x04 16 bit 0.5s-counter, count%2=1:
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0x17..0x18 16 bit time ms xxyy, 00.000-59.000
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0x19..0x1A 16 bit time hh:mm
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0x1B..0x1D HEADER 0xFB6230
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0x049DCE ^ 0xFB6230 = 0xFFFFFE
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Variante 2 (iMS-100 ?)
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<option -2>
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049DCE3E228023DBF53FA700003C74628430C100000000ABE00B3B FB62302390031EECCC00E656E42327562B2436C4C01CDB0F18B09A
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049DCE3E23516AF62B3FC700003C7390D131C100000000AB090000 FB62300000000000032423222422202014211B13220000000067C4
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0x00..0x02 HEADER 0x049DCE
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0x03..0x04 16 bit 0.5s-counter, count%2=0:
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0x17..0x18 16 bit time ms yyxx, 00.000-59.000
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0x19..0x1A 16 bit time hh:mm
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0x1B..0x1D HEADER 0xFB6230
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0x1E..0x1F 16 bit ? date (TT,MM,JJ)=(date/1000,(date/10)%100,(date%10)+10)
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0x20..0x23 32 bit GPS-lat * 1e4 (NMEA DDMM.mmmm)
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0x24..0x27 32 bit GPS-lon * 1e4 (NMEA DDMM.mmmm)
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0x28..0x2A 24 bit GPS-alt * 1e2 (m)
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0x00..0x02 HEADER 0x049DCE
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0x03..0x04 16 bit 0.5s-counter, count%2=1:
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0x17..0x18 16 bit 1024-counter yyxx, +0x400=1024; rollover synchron zu ms-counter, nach rollover auch +0x300=768
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0x1B..0x1D HEADER 0xFB6230
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Die 46bit-Bloecke sind BCH-Codewoerter. Es handelt sich um einen (63,51)-Code mit Generatorpolynom
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x^12+x^10+x^8+x^5+x^4+x^3+1;
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gekuerzt auf (46,34), die letzten 12 bit sind die BCH-Kontrollbits.
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Die 34 Nachrichtenbits sind aufgeteilt in 16+1+16+1, d.h. nach einem 16 bit Block kommt ein Paritaetsbit,
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dass 1 ist, wenn die Anzahl 1en in den 16 bit davor gerade ist, und sonst 0.
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*/
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#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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typedef struct {
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int jahr; int monat; int tag;
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int std; int min; int sek;
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double lat; double lon; double alt;
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} datum_t;
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datum_t datum;
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int option_verbose = 0, // ausfuehrliche Anzeige
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option_raw = 0, // rohe Frames
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option_inv = 0, // invertiert Signal
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option_res = 0, // genauere Bitmessung
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option1 = 0,
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option2 = 0,
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wavloaded = 0;
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/* -------------------------------------------------------------------------- */
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#define BAUD_RATE 2400
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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; // 8bit: 00..FF, centerpoint 0x80=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, par_alt=1;
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unsigned long sample_count = 0;
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int read_bits_fsk(FILE *fp, int *bit, int *len) {
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int n, sample, y0;
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float l, x1;
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static float x0;
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n = 0;
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do{
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y0 = sample;
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sample = read_signed_sample(fp);
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if (sample == EOF_INT) return EOF;
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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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if (!option_res) l = (float)n / samples_per_bit;
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else { // genauere Bitlaengen-Messung
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x1 = sample/(float)(sample-y0); // hilft bei niedriger sample rate
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l = (n+x0-x1) / samples_per_bit; // meist mehr frames (nicht immer)
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x0 = x1;
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}
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*len = (int)(l+0.5);
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if (!option_inv) *bit = (1+par_alt)/2; // oben 1, unten -1
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else *bit = (1-par_alt)/2; // sdr#<rev1381?, invers: unten 1, oben -1
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/* Y-offset ? */
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return 0;
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}
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/* ------------------------------------------------------------------------------------ */
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#define BITFRAME_LEN 1200
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#define RAWBITFRAME_LEN (BITFRAME_LEN*2)
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char frame_rawbits[RAWBITFRAME_LEN+10]; // braucht eigentlich nur 1/4
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char frame_bits[BITFRAME_LEN+10];
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#define HEADLEN 24
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#define RAWHEADLEN (2*HEADLEN)
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char header0x049DCE[] = // 0x049DCE =
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"101010101011010100101011001101001100101011001101"; // 00000100 10011101 11001110
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char header0x049DCEbits[] = "000001001001110111001110";
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//111110110110001000110000
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char header0xFB6230[] = // 0xFB6230 =
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"110011001101001101001101010100101010110010101010"; // 11111011 01100010 00110000
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char header0xFB6230bits[] = "111110110110001000110000";
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// 0x049DCE ^ 0xFB6230 = 0xFFFFFE
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char buf[RAWHEADLEN+1] = "xxxxxxxxxx\0";
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int bufpos = 0;
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/* -------------------------------------------------------------------------- */
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void inc_bufpos() {
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bufpos = (bufpos+1) % RAWHEADLEN;
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}
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char cb_inv(char c) {
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if (c == '0') return '1';
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if (c == '1') return '0';
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return c;
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}
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int compare_subheader() {
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int i, j;
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i = 0;
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j = bufpos;
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while (i < RAWHEADLEN) {
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if (j < 0) j = RAWHEADLEN-1;
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if (buf[j] != header0x049DCE[RAWHEADLEN-1-i]) break;
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j--;
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i++;
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}
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if (i == RAWHEADLEN) return 1;
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i = 0;
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j = bufpos;
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while (i < RAWHEADLEN) {
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if (j < 0) j = RAWHEADLEN-1;
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if (buf[j] != cb_inv(header0x049DCE[RAWHEADLEN-1-i])) break;
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j--;
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i++;
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}
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if (i == RAWHEADLEN) return 3;
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i = 0;
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j = bufpos;
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while (i < RAWHEADLEN) {
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if (j < 0) j = RAWHEADLEN-1;
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if (buf[j] != header0xFB6230[RAWHEADLEN-1-i]) break;
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j--;
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i++;
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}
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if (i == RAWHEADLEN) return 2;
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i = 0;
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j = bufpos;
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while (i < RAWHEADLEN) {
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if (j < 0) j = RAWHEADLEN-1;
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if (buf[j] != cb_inv(header0xFB6230[RAWHEADLEN-1-i])) break;
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j--;
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i++;
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}
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if (i == RAWHEADLEN) return 4;
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return 0;
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}
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/* -------------------------------------------------------------------------- */
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int biphi_s0(char* frame_rawbits, char *frame_bits) {
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int j = 0;
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int byt, bytes[2];
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int c = 0;
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j = 0;
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while (byt = frame_rawbits[j]) {
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if ((byt >= 0x30) && (byt <= 0x31)) {
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bytes[c] = byt;
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c = !c;
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if ((j > 0) && (c == 0)) {
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if ( bytes[0] == bytes[1] ) { byt = '1'; }
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else
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if ( bytes[0] != bytes[1] ) { byt = '0'; }
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frame_bits[j/2] = byt;
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}
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j++;
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}
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}
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frame_bits[j/2] = '\0';
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return j/2;
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}
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int biphi_s(char* frame_rawbits, char *frame_bits) {
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int j = 0;
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int byt;
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j = 0;
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while ( (byt = frame_rawbits[2*j]) && frame_rawbits[2*j+1] ) {
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if ((byt < 0x30) || (byt > 0x31)) break;
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if ( frame_rawbits[2*j] == frame_rawbits[2*j+1] ) { byt = '1'; }
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else { byt = '0'; }
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frame_bits[j] = byt;
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j++;
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}
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frame_bits[j] = '\0';
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return j;
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}
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/* -------------------------------------------------------------------------- */
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ui32_t bitstr2val(char *bits, int len) {
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int j;
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ui8_t bit;
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ui32_t val;
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if ((len < 0) || (len > 32)) return -1;
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val = 0;
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for (j = 0; j < len; j++) {
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bit = bits[j] - 0x30;
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val |= (bit << (len-1-j)); // big endian
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//val |= (bit << j); // little endian
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}
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return val;
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}
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/* -------------------------------------------------------------------------- */
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int main(int argc, char **argv) {
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FILE *fp;
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char *fpname;
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int i, j;
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int bit_count = 0,
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header_found = 0,
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bit, len;
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int counter;
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ui32_t val;
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ui32_t dat2;
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int lat, lat1, lat2,
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lon, lon1, lon2,
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alt, alt1, alt2;
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int latdeg,londeg;
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double latmin, lonmin;
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ui32_t t1, t2, ms, min, std, tt, mm, jj;
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#ifdef CYGWIN
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_setmode(fileno(stdin), _O_BINARY); // _setmode(_fileno(stdin), _O_BINARY);
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#endif
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setbuf(stdout, NULL);
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fpname = argv[0];
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++argv;
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while ((*argv) && (!wavloaded)) {
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if ( (strcmp(*argv, "-h") == 0) || (strcmp(*argv, "--help") == 0) ) {
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help_out:
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fprintf(stderr, "%s <-n> [options] audio.wav\n", fpname);
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fprintf(stderr, " n=1,2\n");
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fprintf(stderr, " options:\n");
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//fprintf(stderr, " -v, --verbose\n");
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fprintf(stderr, " -r, --raw\n");
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return 0;
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}
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/*
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else if ( (strcmp(*argv, "-v") == 0) || (strcmp(*argv, "--verbose") == 0) ) {
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option_verbose = 1;
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}
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*/
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else if ( (strcmp(*argv, "-r") == 0) || (strcmp(*argv, "--raw") == 0) ) {
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option_raw = 1;
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}
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else if (strcmp(*argv, "--res") == 0) { option_res = 1; }
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else if ( (strcmp(*argv, "-i") == 0) || (strcmp(*argv, "--invert") == 0) ) {
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option_inv = 1; // nicht noetig
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}
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else if ( (strcmp(*argv, "-2") == 0) ) {
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option2 = 1;
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}
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else if ( (strcmp(*argv, "-1") == 0) ) {
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option1 = 1;
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}
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else {
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if ((option1 == 1 && option2 == 1) || (!option_raw && option1 == 0 && option2 == 0)) goto help_out;
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fp = fopen(*argv, "rb");
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if (fp == NULL) {
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fprintf(stderr, "%s konnte nicht geoeffnet werden\n", *argv);
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return -1;
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}
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wavloaded = 1;
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}
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++argv;
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}
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if (!wavloaded) fp = stdin;
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i = read_wav_header(fp);
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if (i) {
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fclose(fp);
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return -1;
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}
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bufpos = 0;
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bit_count = 0;
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while (!read_bits_fsk(fp, &bit, &len)) {
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if (len == 0) { // reset_frame();
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/*
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if (byte_count > FRAME_LEN-20) {
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print_frame(byte_count);
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bit_count = 0;
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byte_count = FRAMESTART;
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header_found = 0;
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}
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*/
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//inc_bufpos();
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//buf[bufpos] = 'x';
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continue; // ...
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}
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for (i = 0; i < len; i++) {
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inc_bufpos();
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buf[bufpos] = 0x30 + bit; // Ascii
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if (!header_found) {
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header_found = compare_subheader();
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if (header_found) {
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bit_count = 0;
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for (j = 0; j < HEADLEN; j++) {
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if (header_found % 2 == 1) frame_bits[j] = header0x049DCEbits[j];
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else frame_bits[j] = header0xFB6230bits[j];
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}
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}
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}
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else {
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frame_rawbits[bit_count] = 0x30 + bit;
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bit_count++;
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if (bit_count >= RAWBITFRAME_LEN/4-RAWHEADLEN) { // 600-48
|
|
frame_rawbits[bit_count] = '\0';
|
|
|
|
biphi_s(frame_rawbits, frame_bits+HEADLEN);
|
|
|
|
if (!option2 && !option_raw) {
|
|
|
|
if (header_found % 2 == 1) {
|
|
val = bitstr2val(frame_bits+HEADLEN, 16);
|
|
counter = val & 0xFFFF;
|
|
if (counter % 2 == 0) printf("\n");
|
|
//printf("[0x%04X = %d] ", counter, counter);
|
|
printf("[%d] ", counter);
|
|
|
|
if (counter % 2 == 1) {
|
|
t2 = bitstr2val(frame_bits+HEADLEN+5*46 , 8); // LSB
|
|
t1 = bitstr2val(frame_bits+HEADLEN+5*46+8, 8);
|
|
ms = (t1 << 8) | t2;
|
|
std = bitstr2val(frame_bits+HEADLEN+5*46+17, 8);
|
|
min = bitstr2val(frame_bits+HEADLEN+5*46+25, 8);
|
|
printf(" ");
|
|
printf("%02d:%02d:%06.3f ", std, min, (double)ms/1000.0);
|
|
printf(" ");
|
|
|
|
//printf("\n");
|
|
}
|
|
}
|
|
|
|
if (header_found % 2 == 0) {
|
|
val = bitstr2val(frame_bits+HEADLEN, 16);
|
|
//printf("%04x ", val & 0xFFFF);
|
|
if ((counter % 2 == 0)) { // (val & 0xFFFF) > 0) {// == 0x8080
|
|
//offset=24+16+1;
|
|
|
|
lat1 = bitstr2val(frame_bits+HEADLEN+17, 16);
|
|
lat2 = bitstr2val(frame_bits+HEADLEN+46, 16);
|
|
lon1 = bitstr2val(frame_bits+HEADLEN+46+17, 16);
|
|
lon2 = bitstr2val(frame_bits+HEADLEN+46+46, 16);
|
|
alt1 = bitstr2val(frame_bits+HEADLEN+46+46+17, 16);
|
|
alt2 = bitstr2val(frame_bits+HEADLEN+46+46+46, 16);
|
|
|
|
lat = (lat1 << 16) | lat2;
|
|
lon = (lon1 << 16) | lon2;
|
|
alt = (alt1 << 16) | alt2;
|
|
//printf("%08X %08X %08X : ", lat, lon, alt);
|
|
printf(" ");
|
|
printf("%.6f %.6f %.2f", (double)lat/1e7, (double)lon/1e7, (double)alt/1e2);
|
|
printf(" ");
|
|
|
|
jj = bitstr2val(frame_bits+HEADLEN+5*46+ 8, 8) + 0x0700;
|
|
mm = bitstr2val(frame_bits+HEADLEN+5*46+17, 8);
|
|
tt = bitstr2val(frame_bits+HEADLEN+5*46+25, 8);
|
|
printf(" ");
|
|
printf("%4d-%02d-%02d ", jj, mm, tt);
|
|
printf(" ");
|
|
|
|
//printf("\n");
|
|
}
|
|
}
|
|
|
|
}
|
|
else if (option2 && !option_raw) {
|
|
|
|
if (header_found % 2 == 1) {
|
|
val = bitstr2val(frame_bits+HEADLEN, 16);
|
|
counter = val & 0xFFFF;
|
|
if (counter % 2 == 0) printf("\n");
|
|
//printf("[0x%04X = %d] ", counter, counter);
|
|
printf("[%d] ", counter);
|
|
|
|
if (counter % 2 == 0) {
|
|
t1 = bitstr2val(frame_bits+HEADLEN+5*46 , 8); // MSB
|
|
t2 = bitstr2val(frame_bits+HEADLEN+5*46+8, 8);
|
|
ms = (t1 << 8) | t2;
|
|
std = bitstr2val(frame_bits+HEADLEN+5*46+17, 8);
|
|
min = bitstr2val(frame_bits+HEADLEN+5*46+25, 8);
|
|
printf(" ");
|
|
printf("%02d:%02d:%06.3f ", std, min, (double)ms/1000.0);
|
|
printf(" ");
|
|
}
|
|
}
|
|
|
|
if (header_found % 2 == 0) {
|
|
val = bitstr2val(frame_bits+HEADLEN, 16);
|
|
//printf("%04x ", val & 0xFFFF);
|
|
if ((counter % 2 == 0)) { // (val & 0xFFFF) > 0) {// == 0x2390
|
|
//offset=24+16+1;
|
|
|
|
dat2 = bitstr2val(frame_bits+HEADLEN, 16);
|
|
printf("%05u (?%02d-%02d-%02d) ", dat2, dat2/1000,(dat2/10)%100, (dat2%10)+10);
|
|
|
|
lat1 = bitstr2val(frame_bits+HEADLEN+17, 16);
|
|
lat2 = bitstr2val(frame_bits+HEADLEN+46, 16);
|
|
lon1 = bitstr2val(frame_bits+HEADLEN+46+17, 16);
|
|
lon2 = bitstr2val(frame_bits+HEADLEN+46+46, 16);
|
|
alt1 = bitstr2val(frame_bits+HEADLEN+46+46+17, 16);
|
|
alt2 = bitstr2val(frame_bits+HEADLEN+46+46+46, 8);
|
|
|
|
lat = (lat1 << 16) | lat2;
|
|
lon = (lon1 << 16) | lon2;
|
|
alt = (alt1 << 8) | alt2;
|
|
latdeg = (int)lat / 1e6;
|
|
latmin = (double)(lat/1e6-latdeg)*100/60.0;
|
|
londeg = (int)lon / 1e6;
|
|
lonmin = (double)(lon/1e6-londeg)*100/60.0;
|
|
//printf("%08X %08X %08X : ", lat, lon, alt);
|
|
printf(" ");
|
|
printf("%.6f %.6f %.2f", (double)latdeg+latmin, (double)londeg+lonmin, (double)alt/1e2);
|
|
printf(" ");
|
|
}
|
|
//else { printf("\n"); }
|
|
}
|
|
|
|
}
|
|
else { // raw
|
|
|
|
val = bitstr2val(frame_bits, HEADLEN);
|
|
printf("%06X ", val & 0xFFFFFF);
|
|
printf(" ");
|
|
for (i = 0; i < 6; i++) {
|
|
|
|
val = bitstr2val(frame_bits+HEADLEN+46*i , 16);
|
|
printf("%04X ", val & 0xFFFF);
|
|
|
|
val = bitstr2val(frame_bits+HEADLEN+46*i+17, 16);
|
|
printf("%04X ", val & 0xFFFF);
|
|
|
|
val = bitstr2val(frame_bits+HEADLEN+46*i+34, 12);
|
|
//printf("%03X ", val & 0xFFF);
|
|
//printf(" ");
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
bit_count = 0;
|
|
header_found = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
|