diff --git a/dump1090.c b/dump1090.c index c54dcf6..2cb7b1b 100644 --- a/dump1090.c +++ b/dump1090.c @@ -184,22 +184,23 @@ struct { int onlyaddr; /* Print only ICAO addresses. */ int metric; /* Use metric units. */ int aggressive; /* Aggressive detection algorithm. */ + int mlat; /* Use mlat format for raw data output, i.e. @...; iso *...; */ //&&& /* Interactive mode */ struct aircraft *aircrafts; uint64_t interactive_last_update; /* Last screen update in milliseconds */ /* Statistics */ - int64_t stat_valid_preamble; - int64_t stat_demodulated; - int64_t stat_goodcrc; - int64_t stat_badcrc; - int64_t stat_fixed; - int64_t stat_single_bit_fix; - int64_t stat_two_bits_fix; - int64_t stat_http_requests; - int64_t stat_sbs_connections; - int64_t stat_out_of_phase; + uint64_t stat_valid_preamble; + uint64_t stat_demodulated; + uint64_t stat_goodcrc; + uint64_t stat_badcrc; + uint64_t stat_fixed; + uint64_t stat_single_bit_fix; + uint64_t stat_two_bits_fix; + uint64_t stat_http_requests; + uint64_t stat_sbs_connections; + uint64_t stat_out_of_phase; } Modes; /* The struct we use to store information about a decoded message. */ @@ -218,7 +219,6 @@ struct modesMessage { /* DF 11 */ int ca; /* Responder capabilities. */ - int iid; /* DF 17 */ int metype; /* Extended squitter message type. */ @@ -298,6 +298,7 @@ void modesInitConfig(void) { Modes.interactive_ttl = MODES_INTERACTIVE_TTL; Modes.quiet = 0; Modes.aggressive = 0; +Modes.mlat = 0; //&&& } void modesInit(void) { @@ -697,22 +698,20 @@ uint32_t modes_checksum_table[112] = { }; uint32_t modesChecksum(unsigned char *msg, int bits) { - uint32_t crc = 0; - int offset = (bits == 112) ? 0 : (112-56); - uint8_t theByte = *msg; - uint32_t * pCRCTable = &modes_checksum_table[offset]; + uint32_t crc = 0; + int offset = (bits == 112) ? 0 : (112-56); int j; for(j = 0; j < bits; j++) { - if ((j & 7) == 0) - {theByte = *msg++;} + int byte = j/8; + int bit = j%8; + int bitmask = 1 << (7-bit); - // If bit is set, xor with corresponding table entry. - if (theByte & 0x80) {crc ^= *pCRCTable;} - pCRCTable++; - theByte = theByte << 1; + /* If bit is set, xor with corresponding table entry. */ + if (msg[byte] & bitmask) + crc ^= modes_checksum_table[j+offset]; } - return crc; // 24 bit checksum. + return crc; /* 24 bit checksum. */ } /* Given the Downlink Format (DF) of the message, return the message length @@ -994,27 +993,23 @@ void decodeModesMessage(struct modesMessage *mm, unsigned char *msg) { char *ais_charset = "?ABCDEFGHIJKLMNOPQRSTUVWXYZ????? ???????????????0123456789??????"; /* Work on our local copy */ - memcpy(mm->msg, msg, MODES_LONG_MSG_BYTES); + memcpy(mm->msg,msg,MODES_LONG_MSG_BYTES); msg = mm->msg; /* Get the message type ASAP as other operations depend on this */ - mm->msgtype = msg[0] >> 3; /* Downlink Format */ + mm->msgtype = msg[0]>>3; /* Downlink Format */ mm->msgbits = modesMessageLenByType(mm->msgtype); /* CRC is always the last three bytes. */ mm->crc = ((uint32_t)msg[(mm->msgbits/8)-3] << 16) | ((uint32_t)msg[(mm->msgbits/8)-2] << 8) | (uint32_t)msg[(mm->msgbits/8)-1]; - crc2 = modesChecksum(msg, mm->msgbits); - mm->iid = (mm->crc ^ crc2); + crc2 = modesChecksum(msg,mm->msgbits); /* Check CRC and fix single bit errors using the CRC when * possible (DF 11 and 17). */ mm->errorbit = -1; /* No error */ - if (mm->msgtype == 11) - {mm->crcok = (mm->iid < 80);} - else - {mm->crcok = (mm->iid == 0);} + mm->crcok = (mm->crc == crc2); if (!mm->crcok && Modes.fix_errors && (mm->msgtype == 11 || mm->msgtype == 17)) @@ -1180,6 +1175,7 @@ void decodeModesMessage(struct modesMessage *mm, unsigned char *msg) { * in a human readable format. */ void displayModesMessage(struct modesMessage *mm) { int j; + char * pTimeStamp; //&&& /* Handle only addresses mode first. */ if (Modes.onlyaddr) { @@ -1188,10 +1184,19 @@ void displayModesMessage(struct modesMessage *mm) { } /* Show the raw message. */ - printf("*"); + if (Modes.mlat){ //&&& + printf("@"); //&&& + pTimeStamp = (char *) &mm->timestampMsg; + for (j=5; j>=0;j--) { + printf("%02X",pTimeStamp[j]); + } + } else + printf("*"); + for (j = 0; j < mm->msgbits/8; j++) printf("%02x", mm->msg[j]); printf(";\n"); + if (Modes.raw) { fflush(stdout); /* Provide data to the reader ASAP. */ return; /* Enough for --raw mode */ @@ -1568,7 +1573,6 @@ void detectModeS(uint16_t *m, uint32_t mlen) { /* Pass data to the next layer */ useModesMessage(&mm); - } else { if (Modes.debug & MODES_DEBUG_DEMODERR && use_correction) { printf("The following message has %d demod errors\n", errors); @@ -1576,11 +1580,12 @@ void detectModeS(uint16_t *m, uint32_t mlen) { } } - // Retry with phase correction if possible. + /* Retry with phase correction if possible. */ if (!good_message && !use_correction && j && detectOutOfPhase(pPreamble)) { - use_correction = 1; j--; + j--; + use_correction = 1; } else { - use_correction = 0; + use_correction = 0; } } } @@ -1864,13 +1869,16 @@ void interactiveShowData(void) { printf("\x1b[H\x1b[2J"); /* Clear the screen */ printf( -"Hex ModeA Flight Alt Speed Lat Lon Track Msgs Seen %c\n" +//&&& +//"Hex ModeA Flight Alt Speed Lat Lon Track Msgs Seen %c\n" +///123456 EZS789VA F222>290 +23 356 191 1373 + "Hex Flight Alt V/S GS TT SSR G*456^ Msgs Seen %c\n" "--------------------------------------------------------------------------------\n", progress); while(a && count < Modes.interactive_rows) { int altitude = a->altitude, speed = a->speed, msgs = a->messages; - char squawk[5] = "0"; + char squawk[5] = " "; char spacer = '\0'; /* Convert units to metric if --metric was specified. */ @@ -1885,6 +1893,9 @@ void interactiveShowData(void) { altitude = -9999; } +altitude=altitude/100; //&&& +if (altitude<0) altitude=0; + if (a->squawk > 0 && a->squawk <= 7777) { sprintf(squawk, "%04d", a->squawk); } @@ -1897,9 +1908,13 @@ void interactiveShowData(void) { spacer = ' '; } - printf("%-6s %-4s %-8s %-7d %-7d %-7.03f %-7.03f %-3d %-6d %d%c sec\n", - a->hexaddr, squawk, a->flight, altitude, speed, - a->lat, a->lon, a->track, msgs, (int)(now - a->seen), spacer); +printf("%-6s %-8s F%3d %3d %3d %4s %6d %d %c \n", //&&& + a->hexaddr, a->flight, altitude, speed, + a->track, squawk, msgs, (int)(now - a->seen), spacer); + +// printf("%-6s %-4s %-8s %-7d %-7d %-7.03f %-7.03f %-3d %-6d %d%c sec\n", +// a->hexaddr, squawk, a->flight, altitude, speed, +// a->lat, a->lon, a->track, msgs, (int)(now - a->seen), spacer); a = a->next; count++; } @@ -2101,18 +2116,28 @@ void modesSendBeastOutput(struct modesMessage *mm) { void modesSendRawOutput(struct modesMessage *mm) { char msg[128], *p = msg; int j; + char * pTimeStamp; + + if (Modes.mlat) { //&&& + *p++ = '@'; + pTimeStamp = (char *) &mm->timestampMsg; + for (j = 5; j >= 0; j--) { + sprintf(p, "%02X", pTimeStamp[j]); + p += 2; + } + } else + *p++ = '*'; - *p++ = '*'; for (j = 0; j < mm->msgbits/8; j++) { sprintf(p, "%02X", mm->msg[j]); p += 2; } + *p++ = ';'; *p++ = '\n'; modesSendAllClients(Modes.ros, msg, p-msg); } - /* Write SBS output to TCP clients. */ void modesSendSBSOutput(struct modesMessage *mm, struct aircraft *a) { char msg[256], *p = msg; @@ -2477,6 +2502,7 @@ void showHelp(void) { "--no-fix Disable single-bits error correction using CRC.\n" "--no-crc-check Disable messages with broken CRC (discouraged).\n" "--aggressive More CPU for more messages (two bits fixes, ...).\n" +"--mlat display raw messages in Beast ascii mode.\n" //&&& "--stats With --ifile print stats at exit. No other output.\n" "--onlyaddr Show only ICAO addresses (testing purposes).\n" "--metric Use metric units (meters, km/h, ...).\n" @@ -2600,6 +2626,8 @@ int main(int argc, char **argv) { Modes.ppm_error = atoi(argv[++j]); } else if (!strcmp(argv[j],"--quiet")) { Modes.quiet = 1; + } else if (!strcmp(argv[j],"--mlat")) { + Modes.mlat = 1; //&&& } else { fprintf(stderr, "Unknown or not enough arguments for option '%s'.\n\n", @@ -2660,17 +2688,40 @@ int main(int argc, char **argv) { if (Modes.exit) break; } + /* If --ifile and --stats were given, print statistics. */ } + computeMagnitudeVector(); + + /* Signal to the other thread that we processed the available data + * and we want more (useful for --ifile). */ + Modes.data_ready = 0; + pthread_cond_signal(&Modes.data_cond); + + /* Process data after releasing the lock, so that the capturing + * thread can read data while we perform computationally expensive + * stuff * at the same time. (This should only be useful with very + * slow processors). */ + pthread_mutex_unlock(&Modes.data_mutex); + detectModeS(Modes.magnitude, MODES_ASYNC_BUF_SAMPLES); + Modes.timestampBlk += (MODES_ASYNC_BUF_SAMPLES*6); + backgroundTasks(); + pthread_mutex_lock(&Modes.data_mutex); + if (Modes.exit) break; + } + /* If --ifile and --stats were given, print statistics. */ if (Modes.stats && Modes.filename) { - printf("%lld valid preambles\n", Modes.stat_valid_preamble); - printf("%lld demodulated again after phase correction\n", Modes.stat_out_of_phase); - printf("%lld demodulated with zero errors\n", Modes.stat_demodulated); - printf("%lld with good crc\n", Modes.stat_goodcrc); - printf("%lld with bad crc\n", Modes.stat_badcrc); - printf("%lld errors corrected\n", Modes.stat_fixed); - printf("%lld single bit errors\n", Modes.stat_single_bit_fix); - printf("%lld two bits errors\n", Modes.stat_two_bits_fix); - printf("%lld total usable messages\n", Modes.stat_goodcrc + Modes.stat_fixed); + printf("%lld valid preambles\n", Modes.stat_valid_preamble); + printf("%lld demodulated again after phase correction\n", + Modes.stat_out_of_phase); + printf("%lld demodulated with zero errors\n", + Modes.stat_demodulated); + printf("%lld with good crc\n", Modes.stat_goodcrc); + printf("%lld with bad crc\n", Modes.stat_badcrc); + printf("%lld errors corrected\n", Modes.stat_fixed); + printf("%lld single bit errors\n", Modes.stat_single_bit_fix); + printf("%lld two bits errors\n", Modes.stat_two_bits_fix); + printf("%lld total usable messages\n", + Modes.stat_goodcrc + Modes.stat_fixed); } rtlsdr_close(Modes.dev);