From 04bb05670dfaac4ba29bbd614c3530036fdb6433 Mon Sep 17 00:00:00 2001 From: marshmellow42 Date: Wed, 3 Jun 2015 16:52:20 -0400 Subject: [PATCH] Testing animal tags --- client/cmddata.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++-- common/lfdemod.c | 27 ++++++++++++++++ common/lfdemod.h | 1 + 3 files changed, 107 insertions(+), 2 deletions(-) diff --git a/client/cmddata.c b/client/cmddata.c index 76552351..089e7d5f 100644 --- a/client/cmddata.c +++ b/client/cmddata.c @@ -40,7 +40,7 @@ void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx) size = MAX_DEMOD_BUF_LEN; size_t i = 0; - for (; i < size; i++){ +for (; i < size; i++){ DemodBuffer[i]=buff[startIdx++]; } DemodBufferLen=size; @@ -500,7 +500,7 @@ int ASKbiphaseDemod(const char *Cmd, bool verbose) int offset=0, clk=0, invert=0, maxErr=0, ans=0; ans = sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr); if (ans>0) - ans = ASKDemod(Cmd+1, FALSE, FALSE, 0); + ans = ASKDemod(Cmd+2, FALSE, FALSE, 0); else ans = ASKDemod(Cmd, FALSE, FALSE, 0); if (!ans) { @@ -1457,6 +1457,83 @@ int CmdFSKdemodPyramid(const char *Cmd) return 1; } +// ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits) +// 8 databits + 1 parity (1) +// CIITT 16 chksum +// NATIONAL CODE, ICAR database +// COUNTRY CODE (ISO3166) +// FLAG (animal/non-animal) +int CmdIso11784demodBI(const char *Cmd){ + + int invert = 1; + int clk = 32; + int errCnt = 0; + int maxErr = 0; + uint8_t BitStream[MAX_DEMOD_BUF_LEN]; + size_t size = getFromGraphBuf(BitStream); + + errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0); + if ( errCnt < 0 || errCnt > maxErr ) { + if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: 32", errCnt); + return 0; + } + + errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1); + if (errCnt < 0 || errCnt > maxErr ) { + if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt); + return 0; + } + + int preambleIndex = ISO11784demodBI(BitStream, &size); + if (preambleIndex < 0){ + if (g_debugMode) PrintAndLog("Error ISO11784Demod , no startmarker found :: %d",preambleIndex); + return 0; + } + + setDemodBuf(BitStream, 128, preambleIndex); + //printDemodBuff(); + + size = removeParity(BitStream, preambleIndex + 11, 9, 1, 117); + if ( size <= 0 ) { + if (g_debugMode) PrintAndLog("Error removeParity:: %d", size); + return 0; + } + PrintAndLog("startmarker %d; Size %d", preambleIndex, size); + + //return 1; + //got a good demod + uint32_t NationalCodeA = bytebits_to_byteLSBF(BitStream,32); + uint32_t NationalCodeB = bytebits_to_byteLSBF(BitStream+32,6); + uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10); + uint8_t dataBlockBit = BitStream[48]; + uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14); + uint8_t animalBit = BitStream[63]; + uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16); + uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24); + + PrintAndLog("NationalCode: %x%08x",NationalCodeB,NationalCodeA); + //add rest of print code here... + /* + uint8_t ByteStream[16] = {0x00}; + uint8_t bitCnt = 0; + uint8_t ByteCnt = 0; + size_t startIdx = preambleIndex + 11; //start after preamble + for (size_t idx = 0; idx < size-11; idx++){ + + //lsb first + ByteStream[ByteCnt] = ByteStream[ByteCnt] | (BitStream[startIdx+idx] << bitCnt); + bitCnt++; + if (bitCnt % 8 == 0){ + if (g_debugMode) PrintAndLog("byte %d: %02x", ByteCnt, ByteStream[ByteCnt]); + bitCnt = 0; + ByteCnt++; + } + } + */ + return 1; +} + + //by marshmellow //attempt to psk1 demod graph buffer int PSKDemod(const char *Cmd, bool verbose) diff --git a/common/lfdemod.c b/common/lfdemod.c index 7d40d22e..c0f2bb71 100644 --- a/common/lfdemod.c +++ b/common/lfdemod.c @@ -537,6 +537,18 @@ uint32_t bytebits_to_byte(uint8_t* src, size_t numbits) return num; } +//least significant bit first +uint32_t bytebits_to_byteLSBF(uint8_t* src, size_t numbits) +{ + uint32_t num = 0; + for(int i = 0 ; i < numbits ; i++) + { + num = (num << 1) | (*src); + src++; + } + return num; +} + int IOdemodFSK(uint8_t *dest, size_t size) { if (justNoise(dest, size)) return -1; @@ -590,6 +602,21 @@ size_t removeParity(uint8_t *BitStream, size_t startIdx, uint8_t pLen, uint8_t p return bitCnt; } +// Ask/Biphase Demod then try to locate an ISO 11784/85 ID +// BitStream must contain previously askrawdemod and biphasedemoded data +int ISO11784demodBI(uint8_t *dest, size_t *size) +{ + //make sure buffer has enough data + if (*size < 128) return -1; + + size_t startIdx = 0; + uint8_t preamble[] = {0,0,0,0,0,0,0,0,0,0,1}; + + uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx); + if (errChk == 0) return -2; //preamble not found + return (int)startIdx; +} + // by marshmellow // FSK Demod then try to locate an AWID ID int AWIDdemodFSK(uint8_t *dest, size_t *size) diff --git a/common/lfdemod.h b/common/lfdemod.h index ab81c34c..81157d19 100644 --- a/common/lfdemod.h +++ b/common/lfdemod.h @@ -19,6 +19,7 @@ int askdemod(uint8_t *BinStream, size_t *size, int *clk, int *invert, int maxErr, uint8_t amp, uint8_t askType); int BiphaseRawDecode(uint8_t * BitStream, size_t *size, int offset, int invert); uint32_t bytebits_to_byte(uint8_t* src, size_t numbits); +uint32_t bytebits_to_byteLSBF(uint8_t* src, size_t numbits); uint16_t countFC(uint8_t *BitStream, size_t size, uint8_t fskAdj); int DetectASKClock(uint8_t dest[], size_t size, int *clock, int maxErr); uint8_t DetectCleanAskWave(uint8_t dest[], size_t size, uint8_t high, uint8_t low); -- 2.39.2