kopia lustrzana https://github.com/rs1729/RS
651 wiersze
17 KiB
C
651 wiersze
17 KiB
C
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/* big endian forest
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*
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* gcc -o m1x12 m1x12.c -lm
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* 2016-07-04 Ury
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* M10 w/ G.top GPS (like pilotsonde)
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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 WIN
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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 struct {
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int lat; int lon; int alt;
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int vE; int vN; int vU;
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double vH; double vD; double vV;
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int date; int time;
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char SN[12];
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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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option_color = 0,
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wavloaded = 0;
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/* -------------------------------------------------------------------------- */
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#define BAUD_RATE 9600 //2*4800
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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 *buf, 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 (buf[(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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static int sample;
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int n, 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; // 8bit: 0..127,128..255 (-128..-1,0..127)
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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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// *bit = (1+inv*par_alt)/2; // ausser inv=0
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/* Y-offset ? */
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return 0;
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}
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/* -------------------------------------------------------------------------- */
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/*
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Header = Sync-Header + Sonde-Header:
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1100110011001100 1010011001001100 1101010011010011 0100110101010101 0011010011001100
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uudduudduudduudd ududduuddudduudd uudududduududduu dudduudududududu dduududduudduudd (oder:)
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dduudduudduudduu duduudduuduudduu ddududuudduduudd uduuddududududud uudduduudduudduu (komplement)
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0 0 0 0 0 0 0 0 1 1 - - - 0 0 0 0 1 1 0 0 1 0 0 1 0 0 1 1 1 1 1 0 0 1 0 0 0 0 0
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*/
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#define BITS 8
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#define HEADLEN 32 // HEADLEN+HEADOFS=32 <= strlen(header)
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#define HEADOFS 0
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// Sync-Header // Sonde-Header
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char header[] = "11001100110011001010011001001100"; //"011001001001111100100000"; // M10: 64 9F 20 , M2K2: 64 8F 20
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//"011101101001111100100000"; // M??: 76 9F 20
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//"011001000100100100001001"; // M10-dop: 64 49 09
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#define FRAME_LEN 102
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#define BITFRAME_LEN (FRAME_LEN*BITS)
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#define RAWBITFRAME_LEN (BITFRAME_LEN*2)
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char buf[HEADLEN];
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int bufpos = -1;
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ui8_t frame_bytes[FRAME_LEN+10];
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#define FRAMESTART 0
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char frame_rawbits[RAWBITFRAME_LEN+8]; // frame_rawbits-32="11001100110011001010011001001100";
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char frame_bits[BITFRAME_LEN+4];
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void inc_bufpos() {
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bufpos = (bufpos+1) % HEADLEN;
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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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// Gefahr bei Manchester-Codierung: inverser Header wird leicht fehl-erkannt
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// da manchester1 und manchester2 nur um 1 bit verschoben
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int compare2() {
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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 < HEADLEN) {
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if (j < 0) j = HEADLEN-1;
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if (buf[j] != header[HEADOFS+HEADLEN-1-i]) break;
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j--;
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i++;
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}
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if (i == HEADLEN) return 1;
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i = 0;
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j = bufpos;
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while (i < HEADLEN) {
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if (j < 0) j = HEADLEN-1;
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if (buf[j] != cb_inv(header[HEADOFS+HEADLEN-1-i])) break;
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j--;
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i++;
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}
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if (i == HEADLEN) return -1;
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return 0;
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}
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int bits2bytes(char *bitstr, ui8_t *bytes) {
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int i, bit, d, byteval;
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int bitpos, bytepos;
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bitpos = 0;
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bytepos = 0;
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while (bytepos < FRAME_LEN) {
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byteval = 0;
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d = 1;
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for (i = 0; i < BITS; i++) {
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//bit=*(bitstr+bitpos+i); /* little endian */
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bit=*(bitstr+bitpos+7-i); /* big endian */
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// bit == 'x' ?
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if (bit == '1') byteval += d;
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else /*if ((bit == '0') || (bit == 'x'))*/ byteval += 0;
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d <<= 1;
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}
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bitpos += BITS;
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bytes[bytepos++] = byteval & 0xFF;
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}
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//while (bytepos < FRAME_LEN) bytes[bytepos++] = 0;
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return 0;
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}
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/* -------------------------------------------------------------------------- */
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// PSK (bzw. biphase-M (oder differential Manchester?))
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// nach Synchronisation: 00,11->0 ; 01,10->1 (Phasenwechsel)
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void psk_bpm(char* frame_rawbits, char *frame_bits) {
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int i;
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char bit;
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//int err = 0;
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for (i = 0; i < BITFRAME_LEN; i++) {
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//if (i > 0 && (frame_rawbits[2*i] == frame_rawbits[2*i-1])) err = 1;
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if (frame_rawbits[2*i] == frame_rawbits[2*i+1]) bit = '0';
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else bit = '1';
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//if (err) frame_bits[i] = 'x'; else
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frame_bits[i] = bit;
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//err = 0;
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}
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}
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/* -------------------------------------------------------------------------- */
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#define OFS (0x02)
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#define pos_GPSlat (OFS+0x03) // 4 byte
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#define pos_GPSlon (OFS+0x07) // 4 byte
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#define pos_GPSalt (OFS+0x0B) // 4 byte
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#define pos_GPSvE (OFS+0x0F) // 2 byte
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#define pos_GPSvN (OFS+0x11) // 2 byte
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#define pos_GPSvU (OFS+0x13) // 2 byte
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#define pos_GPStime (OFS+0x15) // 4 byte
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#define pos_GPSdate (OFS+0x19) // 4 byte
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#define pos_SN 0x5D // 2+3 byte
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#define pos_Check 0x63 // 2 byte
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/* -------------------------------------------------------------------------- */
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int get_GPSpos() {
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int i;
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ui8_t bytes[4];
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int val;
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for (i = 0; i < 4; i++) bytes[i] = frame_bytes[pos_GPSlat + i];
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val = 0;
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for (i = 0; i < 4; i++) val |= bytes[i] << (8*(3-i));
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datum.lat = val;
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for (i = 0; i < 4; i++) bytes[i] = frame_bytes[pos_GPSlon + i];
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val = 0;
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for (i = 0; i < 4; i++) val |= bytes[i] << (8*(3-i));
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datum.lon = val;
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for (i = 0; i < 4; i++) bytes[i] = frame_bytes[pos_GPSalt + i];
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val = 0;
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for (i = 0; i < 4; i++) val |= bytes[i] << (8*(3-i));
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datum.alt = val;
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return 0;
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}
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int get_GPSvel() {
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int i;
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ui8_t bytes[2];
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short vel16;
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double vx, vy, vz, dir;
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for (i = 0; i < 2; i++) bytes[i] = frame_bytes[pos_GPSvE + i];
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vel16 = bytes[0] << 8 | bytes[1];
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datum.vE = vel16;
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vx = vel16 / 1e2; // east
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for (i = 0; i < 2; i++) bytes[i] = frame_bytes[pos_GPSvN + i];
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vel16 = bytes[0] << 8 | bytes[1];
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datum.vN = vel16;
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vy= vel16 / 1e2; // north
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for (i = 0; i < 2; i++) bytes[i] = frame_bytes[pos_GPSvU + i];
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vel16 = bytes[0] << 8 | bytes[1];
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datum.vU = vel16;
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vz = vel16 / 1e2; // up
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datum.vH = sqrt(vx*vx+vy*vy);
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dir = atan2(vx, vy) * 180 / M_PI;
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if (dir < 0) dir += 360;
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datum.vD = dir;
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datum.vV = vz;
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return 0;
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}
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int get_GPStime() {
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int i;
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ui8_t bytes[4];
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int val;
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for (i = 0; i < 4; i++) bytes[i] = frame_bytes[pos_GPStime + i];
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val = 0;
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for (i = 0; i < 4; i++) val |= bytes[i] << (8*(3-i));
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datum.time = val;
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return 0;
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}
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int get_GPSdate() {
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int i;
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ui8_t bytes[4];
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int val;
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for (i = 0; i < 4; i++) bytes[i] = frame_bytes[pos_GPSdate + i];
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val = 0;
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for (i = 0; i < 4; i++) val |= bytes[i] << (8*(3-i));
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datum.date = val;
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return 0;
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}
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/* -------------------------------------------------------------------------- */
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int get_SN() {
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int i;
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unsigned byte;
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ui8_t sn_bytes[5];
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for (i = 0; i < 11; i++) datum.SN[i] = ' '; datum.SN[11] = '\0';
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for (i = 0; i < 5; i++) {
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byte = frame_bytes[pos_SN + i];
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sn_bytes[i] = byte;
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}
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byte = sn_bytes[2];
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sprintf(datum.SN, "%1X%02u", (byte>>4)&0xF, byte&0xF);
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byte = sn_bytes[3] | (sn_bytes[4]<<8);
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sprintf(datum.SN+3, " %1X %1u%04u", sn_bytes[0]&0xF, (byte>>13)&0x7, byte&0x1FFF);
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return 0;
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}
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/* -------------------------------------------------------------------------- */
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/*
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g : F^n -> F^16 // checksum, linear
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g(m||b) = f(g(m),b)
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// update checksum
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f : F^16 x F^8 -> F^16 linear
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010100001000000101000000
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001010000100000010100000
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000101000010000001010000
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000010100001000000101000
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000001010000100000010100
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100000100000010000001010
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000000011010100000000100
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100000000101010000000010
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000000001000000000000000
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000000000100000000000000
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000000000010000000000000
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000000000001000000000000
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000000000000100000000000
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000000000000010000000000
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000000000000001000000000
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000000000000000100000000
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*/
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int update_checkM10(int c, ui8_t b) {
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int c0, c1, t, t6, t7, s;
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c1 = c & 0xFF;
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// B
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b = (b >> 1) | ((b & 1) << 7);
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b ^= (b >> 2) & 0xFF;
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// A1
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t6 = ( c & 1) ^ ((c>>2) & 1) ^ ((c>>4) & 1);
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t7 = ((c>>1) & 1) ^ ((c>>3) & 1) ^ ((c>>5) & 1);
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t = (c & 0x3F) | (t6 << 6) | (t7 << 7);
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// A2
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s = (c >> 7) & 0xFF;
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s ^= (s >> 2) & 0xFF;
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c0 = b ^ t ^ s;
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return ((c1<<8) | c0) & 0xFFFF;
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}
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int checkM10(ui8_t *msg, int len) {
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int i, cs;
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cs = 0;
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for (i = 0; i < len; i++) {
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cs = update_checkM10(cs, msg[i]);
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}
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return cs & 0xFFFF;
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}
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/* -------------------------------------------------------------------------- */
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int print_pos(int csOK) {
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int err;
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err = 0;
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err |= get_GPSpos();
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err |= get_GPSvel();
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err |= get_GPStime();
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err |= get_GPSdate();
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if (!err) {
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//fprintf(stdout, " (%06d)", datum.date);
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fprintf(stdout, " %02d-%02d-%02d", datum.date/10000, (datum.date%10000)/100, datum.date%100);
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//fprintf(stdout, " (%09d)", datum.time);
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fprintf(stdout, " %02d:%02d:%06.3f ", datum.time/10000000, (datum.time%10000000)/100000, (datum.time%100000)/1000.0);
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fprintf(stdout, " lat: %.6f° ", datum.lat/1e6);
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fprintf(stdout, " lon: %.6f° ", datum.lon/1e6);
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fprintf(stdout, " alt: %.2fm ", datum.alt/1e2);
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//fprintf(stdout, " (%.1f , %.1f , %.1f) ", datum.vE/1e2, datum.vN/1e2, datum.vU/1e2);
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fprintf(stdout, " vH: %.1fm/s D: %.1f° vV: %.1fm/s", datum.vH, datum.vD, datum.vV);
|
|
|
|
if (option_verbose /*== 2*/) {
|
|
get_SN();
|
|
fprintf(stdout, " SN: %s", datum.SN);
|
|
fprintf(stdout, " # ");
|
|
if (csOK) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]");
|
|
}
|
|
|
|
}
|
|
fprintf(stdout, "\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
void print_frame(int pos) {
|
|
int i;
|
|
ui8_t byte;
|
|
int cs1, cs2;
|
|
|
|
psk_bpm(frame_rawbits, frame_bits);
|
|
bits2bytes(frame_bits, frame_bytes);
|
|
|
|
cs1 = (frame_bytes[pos_Check] << 8) | frame_bytes[pos_Check+1];
|
|
cs2 = checkM10(frame_bytes, pos_Check);
|
|
|
|
if (option_raw) {
|
|
|
|
for (i = 0; i < FRAME_LEN-1; i++) {
|
|
byte = frame_bytes[i];
|
|
fprintf(stdout, "%02x", byte);
|
|
}
|
|
if (option_verbose) {
|
|
fprintf(stdout, " # %04x", cs2);
|
|
if (cs1 == cs2) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]");
|
|
}
|
|
fprintf(stdout, "\n");
|
|
|
|
}
|
|
else print_pos(cs1 == cs2);
|
|
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
FILE *fp;
|
|
char *fpname;
|
|
int i, bit, len;
|
|
int pos;
|
|
int header_found = 0;
|
|
|
|
|
|
#ifdef WIN
|
|
_setmode(fileno(stdin), _O_BINARY); // _setmode(_fileno(stdin), _O_BINARY);
|
|
setbuf(stdout, NULL);
|
|
#endif
|
|
|
|
fpname = argv[0];
|
|
++argv;
|
|
while ((*argv) && (!wavloaded)) {
|
|
if ( (strcmp(*argv, "-h") == 0) || (strcmp(*argv, "--help") == 0) ) {
|
|
fprintf(stderr, "%s [options] audio.wav\n", fpname);
|
|
fprintf(stderr, " options:\n");
|
|
//fprintf(stderr, " -v, --verbose\n");
|
|
fprintf(stderr, " -r, --raw\n");
|
|
fprintf(stderr, " -c, --color\n");
|
|
//fprintf(stderr, " -o, --offset\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, "-i") == 0) || (strcmp(*argv, "--invert") == 0) ) {
|
|
option_inv = 1; // nicht noetig
|
|
}
|
|
else if ( (strcmp(*argv, "-c") == 0) || (strcmp(*argv, "--color") == 0) ) {
|
|
option_color = 1;
|
|
}
|
|
else if (strcmp(*argv, "--res") == 0) { option_res = 1; }
|
|
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;
|
|
}
|
|
|
|
|
|
pos = FRAMESTART;
|
|
|
|
while (!read_bits_fsk(fp, &bit, &len)) {
|
|
|
|
if (len == 0) { // reset_frame();
|
|
if (pos > (pos_GPSdate+4)*2*BITS) {
|
|
for (i = pos; i < RAWBITFRAME_LEN; i++) frame_rawbits[i] = 0x30 + 0;
|
|
print_frame(pos);//byte_count
|
|
header_found = 0;
|
|
pos = FRAMESTART;
|
|
}
|
|
//inc_bufpos();
|
|
//buf[bufpos] = 'x';
|
|
continue; // ...
|
|
}
|
|
|
|
for (i = 0; i < len; i++) {
|
|
|
|
inc_bufpos();
|
|
buf[bufpos] = 0x30 + bit; // Ascii
|
|
|
|
if (!header_found) {
|
|
header_found = compare2();
|
|
}
|
|
else {
|
|
frame_rawbits[pos] = 0x30 + bit; // Ascii
|
|
pos++;
|
|
|
|
if (pos == RAWBITFRAME_LEN) {
|
|
print_frame(pos);//FRAME_LEN
|
|
header_found = 0;
|
|
pos = FRAMESTART;
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
|