From f1b6dca70e35fe49faaa982600217ba0ba730459 Mon Sep 17 00:00:00 2001 From: Zilog80 Date: Wed, 7 Jun 2017 12:52:52 +0200 Subject: [PATCH] m12: ury 20170601 test --- m10/pilotsonde/m12m10mod_20170601ury.c | 819 +++++++++++++++++++++++++ 1 file changed, 819 insertions(+) create mode 100644 m10/pilotsonde/m12m10mod_20170601ury.c diff --git a/m10/pilotsonde/m12m10mod_20170601ury.c b/m10/pilotsonde/m12m10mod_20170601ury.c new file mode 100644 index 0000000..7a9e32c --- /dev/null +++ b/m10/pilotsonde/m12m10mod_20170601ury.c @@ -0,0 +1,819 @@ + +/* big endian forest + * + * M12 w/ M10 modulation ? + * 2017-06-01 Ury + * + */ + + +#include +#include +#include +#include +#ifdef CYGWIN + #include // cygwin: _setmode() + #include +#endif + +typedef unsigned char ui8_t; +typedef unsigned short ui16_t; + +typedef struct { + int date; int time; + double lat; double lon; double alt; + double vH; double vD; double vV; +} datum_t; + +datum_t datum; + +int option_verbose = 0, // ausfuehrliche Anzeige + option_raw = 0, // rohe Frames + option_inv = 0, // invertiert Signal + option_res = 0, // genauere Bitmessung + option_avg = 0, // moving average + option_b = 0, + option_color = 0, + option_rawbits = 0, + wavloaded = 0; + + +/* -------------------------------------------------------------------------- */ + +/* + alternative Demodulation: M10 problematisch + bits_per_sample klein, sync laeuft auseinander + exakte Baudrate entscheidend + 9600 baud -> 9616 baud ? +*/ + +// option_b: exakte Baudrate wichtig! +// im Prinzip in sync-preamble ermittelbar +#define BAUD_RATE 9616 //2*4800 + +int sample_rate = 0, bits_sample = 0, channels = 0; +float samples_per_bit = 0; + +int findstr(char *buf, char *str, int pos) { + int i; + for (i = 0; i < 4; i++) { + if (buf[(pos+i)%4] != str[i]) break; + } + return i; +} + +int read_wav_header(FILE *fp) { + char txt[4+1] = "\0\0\0\0"; + unsigned char dat[4]; + int byte, p=0; + + if (fread(txt, 1, 4, fp) < 4) return -1; + if (strncmp(txt, "RIFF", 4)) return -1; + if (fread(txt, 1, 4, fp) < 4) return -1; + // pos_WAVE = 8L + if (fread(txt, 1, 4, fp) < 4) return -1; + if (strncmp(txt, "WAVE", 4)) return -1; + // pos_fmt = 12L + for ( ; ; ) { + if ( (byte=fgetc(fp)) == EOF ) return -1; + txt[p % 4] = byte; + p++; if (p==4) p=0; + if (findstr(txt, "fmt ", p) == 4) break; + } + if (fread(dat, 1, 4, fp) < 4) return -1; + if (fread(dat, 1, 2, fp) < 2) return -1; + + if (fread(dat, 1, 2, fp) < 2) return -1; + channels = dat[0] + (dat[1] << 8); + + if (fread(dat, 1, 4, fp) < 4) return -1; + memcpy(&sample_rate, dat, 4); //sample_rate = dat[0]|(dat[1]<<8)|(dat[2]<<16)|(dat[3]<<24); + + if (fread(dat, 1, 4, fp) < 4) return -1; + if (fread(dat, 1, 2, fp) < 2) return -1; + //byte = dat[0] + (dat[1] << 8); + + if (fread(dat, 1, 2, fp) < 2) return -1; + bits_sample = dat[0] + (dat[1] << 8); + + // pos_dat = 36L + info + for ( ; ; ) { + if ( (byte=fgetc(fp)) == EOF ) return -1; + txt[p % 4] = byte; + p++; if (p==4) p=0; + if (findstr(txt, "data", p) == 4) break; + } + if (fread(dat, 1, 4, fp) < 4) return -1; + + + fprintf(stderr, "sample_rate: %d\n", sample_rate); + fprintf(stderr, "bits : %d\n", bits_sample); + fprintf(stderr, "channels : %d\n", channels); + + if ((bits_sample != 8) && (bits_sample != 16)) return -1; + + samples_per_bit = sample_rate/(float)BAUD_RATE; + + fprintf(stderr, "samples/bit: %.2f\n", samples_per_bit); + + return 0; +} + + +#define EOF_INT 0x1000000 + +#define LEN_movAvg 3 +int movAvg[LEN_movAvg]; +unsigned long sample_count = 0; +double bitgrenze = 0; + +int read_signed_sample(FILE *fp) { // int = i32_t + int byte, i, sample, s=0; // EOF -> 0x1000000 + + for (i = 0; i < channels; i++) { + // i = 0: links bzw. mono + byte = fgetc(fp); + if (byte == EOF) return EOF_INT; + if (i == 0) sample = byte; + + if (bits_sample == 16) { + byte = fgetc(fp); + if (byte == EOF) return EOF_INT; + if (i == 0) sample += byte << 8; + } + + } + + if (bits_sample == 8) s = sample-128; // 8bit: 00..FF, centerpoint 0x80=128 + if (bits_sample == 16) s = (short)sample; + + if (option_avg) { + movAvg[sample_count % LEN_movAvg] = s; + s = 0; + for (i = 0; i < LEN_movAvg; i++) s += movAvg[i]; + s = (s+0.5) / LEN_movAvg; + } + + sample_count++; + + return s; +} + +int par=1, par_alt=1; + +int read_bits_fsk(FILE *fp, int *bit, int *len) { + static int sample; + int n, y0; + float l, x1; + static float x0; + + n = 0; + do{ + y0 = sample; + sample = read_signed_sample(fp); + if (sample == EOF_INT) return EOF; + //sample_count++; // in read_signed_sample() + par_alt = par; + par = (sample >= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127) + n++; + } while (par*par_alt > 0); + + if (!option_res) l = (float)n / samples_per_bit; + else { // genauere Bitlaengen-Messung + x1 = sample/(float)(sample-y0); // hilft bei niedriger sample rate + l = (n+x0-x1) / samples_per_bit; // meist mehr frames (nicht immer) + x0 = x1; + } + + *len = (int)(l+0.5); + + if (!option_inv) *bit = (1+par_alt)/2; // oben 1, unten -1 + else *bit = (1-par_alt)/2; // sdr#= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127) + sum += sample; + n++; + } while (sample_count < bitgrenze); // n < samples_per_bit + + if (sum >= 0) *bit = 1; + else *bit = 0; + + if (option_inv) *bit ^= 1; + + return 0; +} + +/* -------------------------------------------------------------------------- */ + +/* +Header = Sync-Header + Sonde-Header: +1100110011001100 1010011001001100 1101010011010011 0100110101010101 0011010011001100 +uudduudduudduudd ududduuddudduudd uudududduududduu dudduudududududu dduududduudduudd (oder:) +dduudduudduudduu duduudduuduudduu ddududuudduduudd uduuddududududud uudduduudduudduu (komplement) + 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 +*/ + +#define BITS 8 +#define HEADLEN 32 // HEADLEN+HEADOFS=32 <= strlen(header) +#define HEADOFS 0 + // Sync-Header // Sonde-Header +char header[] = "11001100110011001010011001001100"; //"011001001001111100100000"; // M10: 64 9F 20 , M2K2: 64 8F 20 + //"011101101001111100100000"; // M??: 76 9F 20 + //"011001000100100100001001"; // M10-dop: 64 49 09 + +#define FRAME_LEN 48 +#define BITFRAME_LEN (FRAME_LEN*BITS) +#define RAWBITFRAME_LEN (BITFRAME_LEN*2) + +char buf[HEADLEN]; +int bufpos = -1; + +ui8_t frame_bytes[FRAME_LEN+10]; + +#define FRAMESTART 0 +char frame_rawbits[RAWBITFRAME_LEN+8]; // frame_rawbits-32="11001100110011001010011001001100"; +char frame_bits[BITFRAME_LEN+4]; + + +void inc_bufpos() { + bufpos = (bufpos+1) % HEADLEN; +} + +char cb_inv(char c) { + if (c == '0') return '1'; + if (c == '1') return '0'; + return c; +} + +// Gefahr bei Manchester-Codierung: inverser Header wird leicht fehl-erkannt +// da manchester1 und manchester2 nur um 1 bit verschoben +int compare2() { + int i, j; + + i = 0; + j = bufpos; + while (i < HEADLEN) { + if (j < 0) j = HEADLEN-1; + if (buf[j] != header[HEADOFS+HEADLEN-1-i]) break; + j--; + i++; + } + if (i == HEADLEN) return 1; + + i = 0; + j = bufpos; + while (i < HEADLEN) { + if (j < 0) j = HEADLEN-1; + if (buf[j] != cb_inv(header[HEADOFS+HEADLEN-1-i])) break; + j--; + i++; + } + if (i == HEADLEN) return -1; + + return 0; + +} + +int bits2bytes(char *bitstr, ui8_t *bytes) { + int i, bit, d, byteval; + int bitpos, bytepos; + + bitpos = 0; + bytepos = 0; + + while (bytepos < FRAME_LEN) { + + byteval = 0; + d = 1; + for (i = 0; i < BITS; i++) { + //bit=*(bitstr+bitpos+i); /* little endian */ + bit=*(bitstr+bitpos+7-i); /* big endian */ + // bit == 'x' ? + if (bit == '1') byteval += d; + else /*if ((bit == '0') || (bit == 'x'))*/ byteval += 0; + d <<= 1; + } + bitpos += BITS; + bytes[bytepos++] = byteval & 0xFF; + + } + + //while (bytepos < FRAME_LEN) bytes[bytepos++] = 0; + + return 0; +} + +/* -------------------------------------------------------------------------- */ +// PSK (bzw. biphase-M (oder differential Manchester?)) +// nach Synchronisation: 00,11->0 ; 01,10->1 (Phasenwechsel) +void psk_bpm(char* frame_rawbits, char *frame_bits) { + int i; + char bit; + //int err = 0; + + for (i = 0; i < BITFRAME_LEN; i++) { + + //if (i > 0 && (frame_rawbits[2*i] == frame_rawbits[2*i-1])) err = 1; + + if (frame_rawbits[2*i] == frame_rawbits[2*i+1]) bit = '0'; + else bit = '1'; + + //if (err) frame_bits[i] = 'x'; else + frame_bits[i] = bit; + //err = 0; + + } +} + +/* -------------------------------------------------------------------------- */ + +#define OFS (0x02) +#define pos_GPSlat (OFS+0x03) // 4 byte +#define pos_GPSlon (OFS+0x07) // 4 byte +#define pos_GPSalt (OFS+0x0C) // 3 byte +#define pos_GPSvE (OFS+0x0F) // 2 byte +#define pos_GPSvN (OFS+0x11) // 2 byte +#define pos_GPSvU (OFS+0x13) // 2 byte +#define pos_GPStime (OFS+0x15) // 4 byte +#define pos_GPSdate (OFS+0x19) // 4 byte +#define pos_Check (OFS+0x2B) // 2 byte + + +#define ANSI_COLOR_RED "\x1b[31m" +#define ANSI_COLOR_GREEN "\x1b[32m" +#define ANSI_COLOR_YELLOW "\x1b[33m" +#define ANSI_COLOR_BLUE "\x1b[34m" +#define ANSI_COLOR_MAGENTA "\x1b[35m" +#define ANSI_COLOR_CYAN "\x1b[36m" +#define ANSI_COLOR_RESET "\x1b[0m" + +#define XTERM_COLOR_BROWN "\x1b[38;5;94m" // 38;5;{0..255}m + +#define col_GPStime "\x1b[38;5;27m" // 4 byte +#define col_GPSdate "\x1b[38;5;94m" // 4 byte +#define col_GPSlat "\x1b[38;5;34m" // 4 byte +#define col_GPSlon "\x1b[38;5;70m" // 4 byte +#define col_GPSalt "\x1b[38;5;82m" // 4 byte +#define col_GPSvel "\x1b[38;5;36m" // 6 byte +#define col_Check "\x1b[38;5;11m" // 2 byte +#define col_TXT "\x1b[38;5;244m" +#define col_FRTXT "\x1b[38;5;244m" +#define col_CSok "\x1b[38;5;2m" +#define col_CSno "\x1b[38;5;1m" + + +int get_GPStime() { + int i; + ui8_t bytes[4]; + int val; + + for (i = 0; i < 4; i++) bytes[i] = frame_bytes[pos_GPStime + i]; + val = 0; + for (i = 0; i < 4; i++) val |= bytes[i] << (8*(3-i)); + datum.time = val; + + return 0; +} + +int get_GPSdate() { + int i; + ui8_t bytes[4]; + int val; + + for (i = 0; i < 4; i++) bytes[i] = frame_bytes[pos_GPSdate + i]; + val = 0; + for (i = 0; i < 4; i++) val |= bytes[i] << (8*(3-i)); + datum.date = val; + + return 0; +} + +int get_GPSlat() { + int i; + unsigned byte; + ui8_t gpslat_bytes[4]; + int gpslat; + double lat; + + for (i = 0; i < 4; i++) { + byte = frame_bytes[pos_GPSlat + i]; + gpslat_bytes[i] = byte; + } + + gpslat = 0; + for (i = 0; i < 4; i++) { + gpslat |= gpslat_bytes[i] << (8*(3-i)); + } + lat = gpslat / 1e6; + datum.lat = lat; + + return 0; +} + +int get_GPSlon() { + int i; + unsigned byte; + ui8_t gpslon_bytes[4]; + int gpslon; + double lon; + + for (i = 0; i < 4; i++) { + byte = frame_bytes[pos_GPSlon + i]; + gpslon_bytes[i] = byte; + } + + gpslon = 0; + for (i = 0; i < 4; i++) { + gpslon |= gpslon_bytes[i] << (8*(3-i)); + } + lon = gpslon / 1e6; + datum.lon = lon; + + return 0; +} + +int get_GPSalt() { + int i; + unsigned byte; + ui8_t gpsalt_bytes[4]; + int gpsalt; + double alt; + + for (i = 0; i < 3; i++) { + byte = frame_bytes[pos_GPSalt + i]; + gpsalt_bytes[i] = byte; + } + + gpsalt = 0; + for (i = 0; i < 3; i++) { + gpsalt |= gpsalt_bytes[i] << (8*(2-i)); + } + alt = gpsalt / 100.0; + datum.alt = alt; + + return 0; +} + +int get_GPSvel() { + int i; + ui8_t bytes[2]; + short vel16; + double vx, vy, vz, dir; + + for (i = 0; i < 2; i++) bytes[i] = frame_bytes[pos_GPSvE + i]; + vel16 = bytes[0] << 8 | bytes[1]; + vx = vel16 / 1e2; // east + + for (i = 0; i < 2; i++) bytes[i] = frame_bytes[pos_GPSvN + i]; + vel16 = bytes[0] << 8 | bytes[1]; + vy= vel16 / 1e2; // north + + for (i = 0; i < 2; i++) bytes[i] = frame_bytes[pos_GPSvU + i]; + vel16 = bytes[0] << 8 | bytes[1]; + vz = vel16 / 1e2; // up + + datum.vH = sqrt(vx*vx+vy*vy); + dir = atan2(vx, vy) * 180 / M_PI; + if (dir < 0) dir += 360; + datum.vD = dir; + datum.vV = vz; + + return 0; +} + + +/* -------------------------------------------------------------------------- */ +/* +g : F^n -> F^16 // checksum, linear +g(m||b) = f(g(m),b) + +// update checksum +f : F^16 x F^8 -> F^16 linear + +010100001000000101000000 +001010000100000010100000 +000101000010000001010000 +000010100001000000101000 +000001010000100000010100 +100000100000010000001010 +000000011010100000000100 +100000000101010000000010 +000000001000000000000000 +000000000100000000000000 +000000000010000000000000 +000000000001000000000000 +000000000000100000000000 +000000000000010000000000 +000000000000001000000000 +000000000000000100000000 +*/ + +int update_checkM10(int c, ui8_t b) { + int c0, c1, t, t6, t7, s; + + c1 = c & 0xFF; + + // B + b = (b >> 1) | ((b & 1) << 7); + b ^= (b >> 2) & 0xFF; + + // A1 + t6 = ( c & 1) ^ ((c>>2) & 1) ^ ((c>>4) & 1); + t7 = ((c>>1) & 1) ^ ((c>>3) & 1) ^ ((c>>5) & 1); + t = (c & 0x3F) | (t6 << 6) | (t7 << 7); + + // A2 + s = (c >> 7) & 0xFF; + s ^= (s >> 2) & 0xFF; + + + c0 = b ^ t ^ s; + + return ((c1<<8) | c0) & 0xFFFF; +} + +int checkM10(ui8_t *msg, int len) { + int i, cs; + + cs = 0; + for (i = 0; i < len; i++) { + cs = update_checkM10(cs, msg[i]); + } + + return cs & 0xFFFF; +} + +/* -------------------------------------------------------------------------- */ + +int print_pos(int csOK) { + int err; + + err = 0; + err |= get_GPStime(); + err |= get_GPSdate(); + err |= get_GPSlat(); + err |= get_GPSlon(); + err |= get_GPSalt(); + + if (!err) { + + if (option_color) { + printf(col_TXT); + printf(col_GPSdate"%02d-%02d-%02d"col_TXT" ", datum.date/10000, (datum.date%10000)/100, datum.date%100); + printf(col_GPStime"%02d:%02d:%06.3f"col_TXT" ", datum.time/10000000, (datum.time%10000000)/100000, (datum.time%100000)/1000.0); + printf(" lat: "col_GPSlat"%.6f"col_TXT" ", datum.lat); + printf(" lon: "col_GPSlon"%.6f"col_TXT" ", datum.lon); + printf(" alt: "col_GPSalt"%.2f"col_TXT" ", datum.alt); + if (option_verbose) { + err |= get_GPSvel(); + if (!err) { + printf(" vH: "col_GPSvel"%.1f"col_TXT" D: "col_GPSvel"%.1f°"col_TXT" vV: "col_GPSvel"%.1f"col_TXT" ", datum.vH, datum.vD, datum.vV); + } + if (option_verbose >= 2) { + fprintf(stdout, " # "); + if (csOK) fprintf(stdout, " "col_CSok"[OK]"col_TXT); + else fprintf(stdout, " "col_CSno"[NO]"col_TXT); + } + } + printf(ANSI_COLOR_RESET""); + } + else { + printf("%02d-%02d-%02d ", datum.date/10000, (datum.date%10000)/100, datum.date%100); + printf("%02d:%02d:%06.3f ", datum.time/10000000, (datum.time%10000000)/100000, (datum.time%100000)/1000.0); + printf(" lat: %.6f ", datum.lat); + printf(" lon: %.6f ", datum.lon); + printf(" alt: %.2f ", datum.alt); + if (option_verbose) { + err |= get_GPSvel(); + if (!err) { + printf(" vH: %.1f D: %.1f° vV: %.1f ", datum.vH, datum.vD, datum.vV); + } + if (option_verbose >= 2) { + fprintf(stdout, " # "); + if (csOK) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]"); + } + } + } + printf("\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_rawbits == 1) { + printf("%s\n", frame_rawbits); + } + else + if (option_raw) { + + if (option_color && frame_bytes[1] != 0x49) { + fprintf(stdout, col_FRTXT); + for (i = 0; i < FRAME_LEN-1; i++) { + byte = frame_bytes[i]; + if ((i >= pos_GPStime) && (i < pos_GPStime+4)) fprintf(stdout, col_GPStime); + if ((i >= pos_GPSdate) && (i < pos_GPSdate+4)) fprintf(stdout, col_GPSdate); + if ((i >= pos_GPSlat) && (i < pos_GPSlat+4)) fprintf(stdout, col_GPSlat); + if ((i >= pos_GPSlon) && (i < pos_GPSlon+4)) fprintf(stdout, col_GPSlon); + if ((i >= pos_GPSalt) && (i < pos_GPSalt+4)) fprintf(stdout, col_GPSalt); + if ((i >= pos_GPSvE) && (i < pos_GPSvE+6)) fprintf(stdout, col_GPSvel); + if ((i >= pos_Check) && (i < pos_Check+2)) fprintf(stdout, col_Check); + fprintf(stdout, "%02x", byte); + fprintf(stdout, col_FRTXT); + } + if (option_verbose) { + if (cs1 == cs2) fprintf(stdout, " "col_CSok"[OK]"col_TXT); + else fprintf(stdout, " "col_CSno"[NO]"col_TXT); + } + fprintf(stdout, ANSI_COLOR_RESET"\n"); + } + else { + for (i = 0; i < FRAME_LEN-1; i++) { + byte = frame_bytes[i]; + fprintf(stdout, "%02x", byte); + } + if (option_verbose) { + if (cs1 == cs2) fprintf(stdout, " [OK]"); else fprintf(stdout, " [NO]"); + } + fprintf(stdout, "\n"); + } + + } + else if (frame_bytes[1] == 0x49) { + if (option_verbose == 3) { + for (i = 0; i < FRAME_LEN-1; i++) { + byte = frame_bytes[i]; + fprintf(stdout, "%02x", byte); + } + 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 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, " -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, "-vvv") == 0) ) option_verbose = 3; + 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 if ( (strcmp(*argv, "--avg") == 0) ) { + option_avg = 1; + } + else if (strcmp(*argv, "-b") == 0) { option_b = 1; } + else if ( (strcmp(*argv, "--rawbits") == 0) ) { + option_rawbits = 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) { + frame_rawbits[pos] = '\0'; + print_frame(pos);//FRAME_LEN + header_found = 0; + pos = FRAMESTART; + } + } + + } + if (header_found && option_b) { + bitstart = 1; + + while ( pos < RAWBITFRAME_LEN ) { + if (read_rawbit(fp, &bit) == EOF) break; + frame_rawbits[pos] = 0x30 + bit; + pos++; + } + frame_rawbits[pos] = '\0'; + print_frame(pos);//FRAME_LEN + header_found = 0; + pos = FRAMESTART; + } + } + + printf("\n"); + + fclose(fp); + + return 0; +} +