From 812555f6575fcc960d764586d38716b47c7054d4 Mon Sep 17 00:00:00 2001 From: Zilog80 Date: Mon, 27 May 2019 18:31:30 +0200 Subject: [PATCH] Mk2a/LMS6-1680MHz: full ID, json-output --- mk2a/mk2a_lms1680.c | 765 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 765 insertions(+) create mode 100644 mk2a/mk2a_lms1680.c diff --git a/mk2a/mk2a_lms1680.c b/mk2a/mk2a_lms1680.c new file mode 100644 index 0000000..0d07dac --- /dev/null +++ b/mk2a/mk2a_lms1680.c @@ -0,0 +1,765 @@ + +/* + Sippican MkIIa + LMS-6 (1680 MHz) +*/ + +#include +#include +#include + + +typedef unsigned char ui8_t; +typedef unsigned short ui16_t; +typedef unsigned int ui32_t; + + +int option_verbose = 0, // ausfuehrliche Anzeige + option_raw = 0, // rohe Frames + option_inv = 0, // invertiert Signal + option_crc = 0, // check CRC + option_res = 0, // genauere Bitmessung + option_b = 0, + option_jsn = 0, // JSON output (auto_rx) + wavloaded = 0; + + +/* -------------------------------------------------------------------------- */ + +#define BAUD_RATE 9616 // 9616..9618 + +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 +unsigned long sample_count = 0; + +int read_signed_sample(FILE *fp) { // int = i32_t + int byte, i, ret; // 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) ret = byte; + + if (bits_sample == 16) { + byte = fgetc(fp); + if (byte == EOF) return EOF_INT; + if (i == 0) ret += byte << 8; + } + + } + + sample_count++; + + if (bits_sample == 8) return ret-128; // 8bit: 00..FF, centerpoint 0x80=128 + if (bits_sample == 16) return (short)ret; + + return ret; +} + +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++; + 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; + scount++; + } while (scount < bitgrenze); // n < samples_per_bit + + if (sum >= 0) *bit = 1; + else *bit = 0; + + if (option_inv) *bit ^= 1; + + return 0; +} + +/* -------------------------------------------------------------------------- */ + + +#define BITS (1+8+1) // 8N1 = 10bit/byte + +#define HEADLEN 40 +#define HEADOFS 0 + // CA CA CA 24 52 +char header[] = "0010100111""0010100111""0010100111""0001001001"; //"0010010101"; +// moeglicherweise auch anderes sync-byte als 0xCA moeglich +char sync[] = "0010100111""0010100111""0010100111""0010100111"; // CA CA CA CA + +#define FRAMESTART 0 + +#define FRAME_LEN (960+2) // max; min 36+3 GPS +#define BITFRAME_LEN (FRAME_LEN*BITS) + +char buf[HEADLEN]; +int bufpos = -1; + +ui8_t frame_bytes[FRAME_LEN] = { 0x24 }; // = { 0x24, 0x52, ... }; +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; +} + +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 findsync() { + int i, j; + + i = 0; + j = bufpos; + // SYNCLEN=HEADLEN + while (i < HEADLEN) { + if (j < 0) j = HEADLEN-1; + if (buf[j] != sync[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 = 1; i < BITS-1; i++) { + bit = *(bitstr+bitpos+i); /* little endian */ + //bit = *(bitstr+bitpos+BITS-1-i); /* big endian */ + if (bit == '\0') goto frame_end; + if (bit == '1') byteval += d; + else /*if ((bit == '0') */ byteval += 0; + d <<= 1; + } + bitpos += BITS; + bytes[bytepos++] = byteval; + + } +frame_end: + for (i = bytepos; i < FRAME_LEN; i++) bytes[i] = 0; + + return bytepos; +} + +/* -------------------------------------------------------------------------- */ + +int crc16_0(ui8_t frame[], int len) { + int crc16poly = 0x1021; + int rem = 0x0, i, j; + int byte; + + for (i = 0; i < len; i++) { + byte = frame[i]; + rem = rem ^ (byte << 8); + for (j = 0; j < 8; j++) { + if (rem & 0x8000) { + rem = (rem << 1) ^ crc16poly; + } + else { + rem = (rem << 1); + } + rem &= 0xFFFF; + } + } + return rem; +} + +typedef struct { + int frnr; + ui32_t id; + int week; int gpstow; + int jahr; int monat; int tag; + int wday; + int std; int min; float sek; + double lat; double lon; double alt; + double vH; double vD; double vV; + double vE; double vN; double vU; + //int freq; +} gpx_t; + +gpx_t gpx; + + +#define OFS 2 // (0x2452 ..) +#define pos_SondeID (OFS+0x02) // 2 byte (LSB) +#define pos_FrameNb (OFS+0x04) // 2 byte +//GPS Position +#define pos_GPSTOW (OFS+0x08) // 4 byte, subframe 0x(2452)54 +#define pos_GPSlat (OFS+0x10) // 4 byte, subframe 0x(2452)54 +#define pos_GPSlon (OFS+0x14) // 4 byte, subframe 0x(2452)54 +#define pos_GPSalt (OFS+0x18) // 4 byte, subframe 0x(2452)54 +//GPS Velocity East-North-Up (ENU) +#define pos_GPSvO (OFS+0x1C) // 3 byte, subframe 0x(2452)54 +#define pos_GPSvN (OFS+0x1F) // 3 byte, subframe 0x(2452)54 +#define pos_GPSvV (OFS+0x22) // 3 byte, subframe 0x(2452)54 +// full 1680MHz-ID, config-subblock:sonde_id +#define pos_FullID (OFS+0x30) // 2+2 byte (LSB,MSB), subframe 0x(2452)4D + + +int check_CRC(int len) { + ui32_t crclen = 0, + crcdat = 0; +/* + if (frame_bytes[OFS] == 0x4D) crclen = 67; + else if (frame_bytes[OFS] == 0x54) crclen = 172; // 172, 146? variable? Mk2a, LMS6-1680? + else crclen = len; +*/ + crclen = len; + crcdat = (frame_bytes[crclen]<<8) | frame_bytes[crclen+1]; + if ( crcdat != crc16_0(frame_bytes, crclen) ) { + return 1; // CRC NO + } + else return 0; // CRC OK +} + +int get_FrameNb() { + int i; + unsigned byte; + ui8_t frnr_bytes[2]; + int frnr; + + for (i = 0; i < 2; i++) { + byte = frame_bytes[pos_FrameNb + i]; + frnr_bytes[i] = byte; + } + + frnr = (frnr_bytes[0] << 8) + frnr_bytes[1] ; + gpx.frnr = frnr; + + return 0; +} + + +//char weekday[7][3] = { "So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"}; +char weekday[7][4] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}; + +int get_GPStime() { + int i; + unsigned byte; + ui8_t gpstime_bytes[4]; + int gpstime = 0, // 32bit + day; + float ms; + + for (i = 0; i < 4; i++) { + byte = frame_bytes[pos_GPSTOW + i]; + gpstime_bytes[i] = byte; + } + gpstime = 0; + for (i = 0; i < 4; i++) { + gpstime |= gpstime_bytes[i] << (8*(3-i)); + } + + gpx.gpstow = gpstime; + + ms = gpstime % 1000; + gpstime /= 1000; + + day = gpstime / (24 * 3600); + gpstime %= (24*3600); + + if ((day < 0) || (day > 6)) return -1; + gpx.wday = day; + gpx.std = gpstime / 3600; + gpx.min = (gpstime % 3600) / 60; + gpx.sek = gpstime % 60 + ms/1000.0; + + return 0; +} + +double B60B60 = 0xB60B60; // 2^32/360 = 0xB60B60.xxx + +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]; + if (byte > 0xFF) return -1; + gpslat_bytes[i] = byte; + } + + gpslat = 0; + for (i = 0; i < 4; i++) { + gpslat |= gpslat_bytes[i] << (8*(3-i)); + } + lat = gpslat / B60B60; + gpx.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]; + if (byte > 0xFF) return -1; + gpslon_bytes[i] = byte; + } + + gpslon = 0; + for (i = 0; i < 4; i++) { + gpslon |= gpslon_bytes[i] << (8*(3-i)); + } + lon = gpslon / B60B60; + gpx.lon = lon; + + return 0; +} + +int get_GPSalt() { + int i; + unsigned byte; + ui8_t gpsheight_bytes[4]; + int gpsheight; + double height; + + for (i = 0; i < 4; i++) { + byte = frame_bytes[pos_GPSalt + i]; + if (byte > 0xFF) return -1; + gpsheight_bytes[i] = byte; + } + + gpsheight = 0; + for (i = 0; i < 4; i++) { + gpsheight |= gpsheight_bytes[i] << (8*(3-i)); + } + height = gpsheight / 1000.0; + gpx.alt = height; + + if (height < -100 || height > 60000) return -1; + return 0; +} + +int get_GPSvel24() { + int i; + unsigned byte; + ui8_t gpsVel_bytes[3]; + int vel24; + double vx, vy, vz, dir; //, alpha; + + for (i = 0; i < 3; i++) { + byte = frame_bytes[pos_GPSvO + i]; + if (byte > 0xFF) return -1; + gpsVel_bytes[i] = byte; + } + vel24 = gpsVel_bytes[0] << 16 | gpsVel_bytes[1] << 8 | gpsVel_bytes[2]; + if (vel24 > (0x7FFFFF)) vel24 -= 0x1000000; + vx = vel24 / 1e3; // ost + + for (i = 0; i < 3; i++) { + byte = frame_bytes[pos_GPSvN + i]; + if (byte > 0xFF) return -1; + gpsVel_bytes[i] = byte; + } + vel24 = gpsVel_bytes[0] << 16 | gpsVel_bytes[1] << 8 | gpsVel_bytes[2]; + if (vel24 > (0x7FFFFF)) vel24 -= 0x1000000; + vy= vel24 / 1e3; // nord + + for (i = 0; i < 3; i++) { + byte = frame_bytes[pos_GPSvV + i]; + if (byte > 0xFF) return -1; + gpsVel_bytes[i] = byte; + } + vel24 = gpsVel_bytes[0] << 16 | gpsVel_bytes[1] << 8 | gpsVel_bytes[2]; + if (vel24 > (0x7FFFFF)) vel24 -= 0x1000000; + vz = vel24 / 1e3; // hoch + + gpx.vE = vx; + gpx.vN = vy; + gpx.vU = vz; + + + gpx.vH = sqrt(vx*vx+vy*vy); +/* + alpha = atan2(vy, vx)*180/M_PI; // ComplexPlane (von x-Achse nach links) - GeoMeteo (von y-Achse nach rechts) + dir = 90-alpha; // z=x+iy= -> i*conj(z)=y+ix=re(i(pi/2-t)), Achsen und Drehsinn vertauscht + if (dir < 0) dir += 360; // atan2(y,x)=atan(y/x)=pi/2-atan(x/y) , atan(1/t) = pi/2 - atan(t) + gpx.vD2 = dir; +*/ + dir = atan2(vx, vy) * 180 / M_PI; + if (dir < 0) dir += 360; + gpx.vD = dir; + + gpx.vV = vz; + + return 0; +} + +void print_frame(int len) { + + int i, crc_err = 0; + int flen = len/BITS; + + for (i = len; i < BITFRAME_LEN; i++) frame_bits[i] = 0; // oder: '0' + bits2bytes(frame_bits, frame_bytes+1); + + while (flen > 2 && frame_bytes[flen-1] == 0xCA) flen--; // if crc != 0xYYCA ... + + crc_err = check_CRC(flen-2); + if (crc_err) { // crc_bytes == sync_bytes? + crc_err = check_CRC(flen-1); + if (crc_err == 0) flen += 1; + else { + crc_err = check_CRC(flen); + if (crc_err == 0) flen += 2; + } + } + + if (option_raw) { + for (i = 0; i < flen; i++) printf("%02x ", frame_bytes[i]); + if (option_crc) { + if (crc_err==0) printf(" [OK]"); else printf(" [NO]"); + } + printf("\n"); + } + else { + + if (frame_bytes[OFS] == 0x4D && len/BITS > pos_FullID+4) { + if ( !crc_err ) { + if (frame_bytes[pos_SondeID] == frame_bytes[pos_FullID] && + frame_bytes[pos_SondeID+1] == frame_bytes[pos_FullID+1]) { + ui32_t __id = (frame_bytes[pos_FullID+2]<<24) | (frame_bytes[pos_FullID+3]<<16) + | (frame_bytes[pos_FullID] << 8) | frame_bytes[pos_FullID+1]; + gpx.id = __id; + } + } + } + + if (frame_bytes[OFS] == 0x54 && len/BITS > pos_GPSalt+4) { + + get_FrameNb(); + get_GPStime(); + get_GPSlat(); + get_GPSlon(); + get_GPSalt(); + + if ( !crc_err ) { + ui32_t _id = (frame_bytes[pos_SondeID]<<8) | frame_bytes[pos_SondeID+1]; + if ((gpx.id & 0xFFFF) != _id) gpx.id = _id; + } + if (option_verbose && !crc_err) { + if (gpx.id & 0xFFFF0000) printf(" (%u)", gpx.id); + else if (gpx.id) printf(" (0x%04X)", gpx.id); + } + + printf(" [%5d] ", gpx.frnr); + + printf("%s ", weekday[gpx.wday]); + printf("%02d:%02d:%06.3f ", gpx.std, gpx.min, gpx.sek); // falls Rundung auf 60s: Ueberlauf + printf(" lat: %.5f ", gpx.lat); + printf(" lon: %.5f ", gpx.lon); + printf(" alt: %.2fm ", gpx.alt); + + get_GPSvel24(); + printf(" vH: %.1fm/s D: %.1f vV: %.1fm/s ", gpx.vH, gpx.vD, gpx.vV); + //if (option_verbose == 2) printf(" (%.1f ,%.1f,%.1f) ", gpx.vE, gpx.vN, gpx.vU); + + if (option_crc) { + if (crc_err==0) printf(" [OK]"); else printf(" [NO]"); + } + + printf("\n"); + + if (option_jsn) { + // Print JSON output required by auto_rx. + if (crc_err==0 && (gpx.id & 0xFFFF0000)) { // CRC-OK and FullID + // UTC oder GPS? + printf("{ \"frame\": %d, \"id\": \"%d\", \"time\": \"%02d:%02d:%06.3fZ\", \"lat\": %.5f, \"lon\": %.5f, \"alt\": %.5f, \"vel_h\": %.5f, \"heading\": %.5f, \"vel_v\": %.5f }\n", + gpx.frnr, gpx.id, gpx.std, gpx.min, gpx.sek, gpx.lat, gpx.lon, gpx.alt, gpx.vH, gpx.vD, gpx.vV ); + printf("\n"); + } + } + + } + + } + +} + + +int main(int argc, char **argv) { + + FILE *fp; + char *fpname; + int i, bit, len; + int pos; + int header_found = 0; + + + 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"); + 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; + } + else if (strcmp(*argv, "-b" ) == 0) { option_b = 1; } + else if (strcmp(*argv, "--crc") == 0) { option_crc = 1; } + else if (strcmp(*argv, "--res") == 0) { option_res = 1; } + else if (strcmp(*argv, "--json") == 0) { + option_jsn = 1; + option_crc = 1; + option_verbose = 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 > BITS*(pos_GPSalt+4)) { + print_frame(pos); + header_found = 0; + pos = FRAMESTART; + } + //inc_bufpos(); + //buf[bufpos] = 'x'; + continue; // ... + } + + for (i = 0; i < len; i++) { + + inc_bufpos(); + buf[bufpos] = bit + 0x30; + + if (!header_found) { + header_found = compare2(); + } + else { + frame_bits[pos] = bit + 0x30; + pos++; + if ( pos == BITFRAME_LEN || findsync() ) { + print_frame(pos);//FRAME_LEN + header_found = 0; + pos = FRAMESTART; + } + } + } + if (header_found && option_b==1) { + bitstart = 1; + + while ( pos < BITFRAME_LEN && !findsync()) { + if (read_rawbit(fp, &bit) == EOF) break; + inc_bufpos(); + buf[bufpos] = bit + 0x30; + frame_bits[pos] = bit + 0x30; + pos++; + } + frame_bits[pos] = '\0'; + print_frame(pos);//FRAME_LEN + + header_found = 0; + pos = FRAMESTART; + } + + } + + printf("\n"); + + fclose(fp); + + return 0; +} +