X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/09ffd16ee2d0d6d43fc562035487226cf4f58b86..0c4750c3ba006eebb8862ed5ae5a4a42983056d7:/armsrc/iso15693.c diff --git a/armsrc/iso15693.c b/armsrc/iso15693.c index e7145c5c..ad6f5cfc 100644 --- a/armsrc/iso15693.c +++ b/armsrc/iso15693.c @@ -81,7 +81,10 @@ #define AddCrc(data,datalen) Iso15693AddCrc(data,datalen) #define sprintUID(target,uid) Iso15693sprintUID(target,uid) -int DEBUG=0; +// approximate amplitude=sqrt(ci^2+cq^2) +#define AMPLITUDE(ci, cq) (MAX(ABS(ci), ABS(cq)) + (MIN(ABS(ci), ABS(cq))>>1)) + +static int DEBUG = 0; // --------------------------- @@ -303,13 +306,9 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int * // NOW READ RESPONSE FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); - //spindelay(60); // greg - experiment to get rid of some of the 0 byte/failed reads c = 0; - getNext = FALSE; + getNext = false; for(;;) { - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x43; - } if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { int8_t b; b = (int8_t)AT91C_BASE_SSC->SSC_RHR; @@ -319,22 +318,11 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int * // every other is Q. We just want power, so abs(I) + abs(Q) is // close to what we want. if(getNext) { - int8_t r; + uint8_t r = AMPLITUDE(b, prev); - if(b < 0) { - r = -b; - } else { - r = b; - } - if(prev < 0) { - r -= prev; - } else { - r += prev; - } + dest[c++] = r; - dest[c++] = (uint8_t)r; - - if(c >= 2000) { + if(c >= 4000) { break; } } else { @@ -352,12 +340,10 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int * int i, j; int max = 0, maxPos=0; - int skip = 4; - - // if(GraphTraceLen < 1000) return; // THIS CHECKS FOR A BUFFER TO SMALL + int skip = 2; // First, correlate for SOF - for(i = 0; i < 100; i++) { + for(i = 0; i < 200; i++) { // usually, SOF is found around i = 60 int corr = 0; for(j = 0; j < arraylen(FrameSOF); j += skip) { corr += FrameSOF[j]*dest[i+(j/skip)]; @@ -367,7 +353,7 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int * maxPos = i; } } - // DbpString("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip)); + if (DEBUG) Dbprintf("SOF at %d, correlation %d", maxPos, max/(arraylen(FrameSOF)/skip)); int k = 0; // this will be our return value @@ -381,10 +367,15 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int * memset(outBuf, 0, sizeof(outBuf)); uint8_t mask = 0x01; for(;;) { - int corr0 = 0, corr1 = 0, corrEOF = 0; + int corr0 = 0, corr00 = 0, corr01 = 0, corr1 = 0, corrEOF = 0; for(j = 0; j < arraylen(Logic0); j += skip) { corr0 += Logic0[j]*dest[i+(j/skip)]; } + corr01 = corr00 = corr0; + for(j = 0; j < arraylen(Logic0); j += skip) { + corr00 += Logic0[j]*dest[i+arraylen(Logic0)/skip+(j/skip)]; + corr01 += Logic1[j]*dest[i+arraylen(Logic0)/skip+(j/skip)]; + } for(j = 0; j < arraylen(Logic1); j += skip) { corr1 += Logic1[j]*dest[i+(j/skip)]; } @@ -392,11 +383,14 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int * corrEOF += FrameEOF[j]*dest[i+(j/skip)]; } // Even things out by the length of the target waveform. + corr00 *= 2; + corr01 *= 2; corr0 *= 4; corr1 *= 4; - if(corrEOF > corr1 && corrEOF > corr0) { - // DbpString("EOF at %d", i); + if(corrEOF > corr1 && corrEOF > corr00 && corrEOF > corr01) { + if (DEBUG) Dbprintf("EOF at %d, correlation %d (corr01: %d, corr00: %d, corr1: %d, corr0: %d)", + i, corrEOF, corr01, corr00, corr1, corr0); break; } else if(corr1 > corr0) { i += arraylen(Logic1)/skip; @@ -409,7 +403,7 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int * k++; mask = 0x01; } - if((i+(int)arraylen(FrameEOF)) >= 2000) { + if((i+(int)arraylen(FrameEOF)/skip) >= 4000) { DbpString("ran off end!"); break; } @@ -455,11 +449,8 @@ static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); //spindelay(60); // greg - experiment to get rid of some of the 0 byte/failed reads c = 0; - getNext = FALSE; + getNext = false; for(;;) { - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x43; - } if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { int8_t b = (int8_t)AT91C_BASE_SSC->SSC_RHR; @@ -468,22 +459,11 @@ static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int // every other is Q. We just want power, so abs(I) + abs(Q) is // close to what we want. if(getNext) { - int8_t r; - - if(b < 0) { - r = -b; - } else { - r = b; - } - if(prev < 0) { - r -= prev; - } else { - r += prev; - } + uint8_t r = AMPLITUDE(b, prev); - dest[c++] = (uint8_t)r; + dest[c++] = r; - if(c >= 20000) { + if(c >= BIGBUF_SIZE) { break; } } else { @@ -501,12 +481,10 @@ static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int int i, j; int max = 0, maxPos=0; - int skip = 4; - -// if(GraphTraceLen < 1000) return; // THIS CHECKS FOR A BUFFER TO SMALL + int skip = 2; // First, correlate for SOF - for(i = 0; i < 19000; i++) { + for(i = 0; i < 38000; i++) { int corr = 0; for(j = 0; j < arraylen(FrameSOF); j += skip) { corr += FrameSOF[j]*dest[i+(j/skip)]; @@ -516,7 +494,7 @@ static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int maxPos = i; } } -// DbpString("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip)); + if (DEBUG) Dbprintf("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip)); int k = 0; // this will be our return value @@ -530,10 +508,15 @@ static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int memset(outBuf, 0, sizeof(outBuf)); uint8_t mask = 0x01; for(;;) { - int corr0 = 0, corr1 = 0, corrEOF = 0; + int corr0 = 0, corr00 = 0, corr01 = 0, corr1 = 0, corrEOF = 0; for(j = 0; j < arraylen(Logic0); j += skip) { corr0 += Logic0[j]*dest[i+(j/skip)]; } + corr01 = corr00 = corr0; + for(j = 0; j < arraylen(Logic0); j += skip) { + corr00 += Logic0[j]*dest[i+arraylen(Logic0)/skip+(j/skip)]; + corr01 += Logic1[j]*dest[i+arraylen(Logic0)/skip+(j/skip)]; + } for(j = 0; j < arraylen(Logic1); j += skip) { corr1 += Logic1[j]*dest[i+(j/skip)]; } @@ -541,11 +524,14 @@ static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int corrEOF += FrameEOF[j]*dest[i+(j/skip)]; } // Even things out by the length of the target waveform. + corr00 *= 2; + corr01 *= 2; corr0 *= 4; corr1 *= 4; - if(corrEOF > corr1 && corrEOF > corr0) { - // DbpString("EOF at %d", i); + if(corrEOF > corr1 && corrEOF > corr00 && corrEOF > corr01) { + if (DEBUG) Dbprintf("EOF at %d, correlation %d (corr01: %d, corr00: %d, corr1: %d, corr0: %d)", + i, corrEOF, corr01, corr00, corr1, corr0); break; } else if(corr1 > corr0) { i += arraylen(Logic1)/skip; @@ -558,7 +544,7 @@ static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int k++; mask = 0x01; } - if((i+(int)arraylen(FrameEOF)) >= 2000) { + if((i+(int)arraylen(FrameEOF)/skip) >= BIGBUF_SIZE) { DbpString("ran off end!"); break; } @@ -624,21 +610,14 @@ void AcquireRawAdcSamplesIso15693(void) break; } } - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; - (void)r; - } WDT_HIT(); } FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); c = 0; - getNext = FALSE; + getNext = false; for(;;) { - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x43; - } if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { int8_t b; b = (int8_t)AT91C_BASE_SSC->SSC_RHR; @@ -648,22 +627,11 @@ void AcquireRawAdcSamplesIso15693(void) // every other is Q. We just want power, so abs(I) + abs(Q) is // close to what we want. if(getNext) { - int8_t r; + uint8_t r = AMPLITUDE(b, prev); - if(b < 0) { - r = -b; - } else { - r = b; - } - if(prev < 0) { - r -= prev; - } else { - r += prev; - } - - dest[c++] = (uint8_t)r; + dest[c++] = r; - if(c >= 2000) { + if(c >= 4000) { break; } } else { @@ -699,11 +667,8 @@ void RecordRawAdcSamplesIso15693(void) FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); c = 0; - getNext = FALSE; + getNext = false; for(;;) { - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x43; - } if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { int8_t b; b = (int8_t)AT91C_BASE_SSC->SSC_RHR; @@ -713,22 +678,11 @@ void RecordRawAdcSamplesIso15693(void) // every other is Q. We just want power, so abs(I) + abs(Q) is // close to what we want. if(getNext) { - int8_t r; - - if(b < 0) { - r = -b; - } else { - r = b; - } - if(prev < 0) { - r -= prev; - } else { - r += prev; - } + uint8_t r = AMPLITUDE(b, prev); - dest[c++] = (uint8_t)r; + dest[c++] = r; - if(c >= 7000) { + if(c >= 14000) { break; } } else { @@ -880,7 +834,7 @@ int SendDataTag(uint8_t *send, int sendlen, int init, int speed, uint8_t **recv) if (init) Iso15693InitReader(); int answerLen=0; - uint8_t *answer = BigBuf_get_addr() + 3660; + uint8_t *answer = BigBuf_get_addr() + 4000; if (recv != NULL) memset(answer, 0, 100); if (!speed) { @@ -1001,7 +955,7 @@ void ReaderIso15693(uint32_t parameter) int answerLen1 = 0; int answerLen2 = 0; - int answerLen3 = 0; + // int answerLen3 = 0; int i = 0; int samples = 0; int tsamples = 0; @@ -1011,11 +965,11 @@ void ReaderIso15693(uint32_t parameter) FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - uint8_t *answer1 = BigBuf_get_addr() + 3660; - uint8_t *answer2 = BigBuf_get_addr() + 3760; - uint8_t *answer3 = BigBuf_get_addr() + 3860; + uint8_t *answer1 = BigBuf_get_addr() + 4000; + uint8_t *answer2 = BigBuf_get_addr() + 4100; + // uint8_t *answer3 = BigBuf_get_addr() + 4200; // Blank arrays - memset(answer1, 0x00, 300); + memset(answer1, 0x00, 200); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); // Setup SSC @@ -1069,21 +1023,21 @@ void ReaderIso15693(uint32_t parameter) TagUID[3],TagUID[2],TagUID[1],TagUID[0]); - Dbprintf("%d octets read from SELECT request:", answerLen2); - DbdecodeIso15693Answer(answerLen2,answer2); - Dbhexdump(answerLen2,answer2,true); + // Dbprintf("%d octets read from SELECT request:", answerLen2); + // DbdecodeIso15693Answer(answerLen2,answer2); + // Dbhexdump(answerLen2,answer2,true); - Dbprintf("%d octets read from XXX request:", answerLen3); - DbdecodeIso15693Answer(answerLen3,answer3); - Dbhexdump(answerLen3,answer3,true); + // Dbprintf("%d octets read from XXX request:", answerLen3); + // DbdecodeIso15693Answer(answerLen3,answer3); + // Dbhexdump(answerLen3,answer3,true); // read all pages if (answerLen1>=12 && DEBUG) { i=0; while (i<32) { // sanity check, assume max 32 pages BuildReadBlockRequest(TagUID,i); - TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); - answerLen2 = GetIso15693AnswerFromTag(answer2, 100, &samples, &elapsed); + TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); + answerLen2 = GetIso15693AnswerFromTag(answer2, 100, &samples, &elapsed); if (answerLen2>0) { Dbprintf("READ SINGLE BLOCK %d returned %d octets:",i,answerLen2); DbdecodeIso15693Answer(answerLen2,answer2); @@ -1117,7 +1071,7 @@ void SimTagIso15693(uint32_t parameter, uint8_t *uid) FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - uint8_t *buf = BigBuf_get_addr() + 3660; + uint8_t *buf = BigBuf_get_addr() + 4000; memset(buf, 0x00, 100); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); @@ -1221,7 +1175,7 @@ void DirectTag15693Command(uint32_t datalen,uint32_t speed, uint32_t recv, uint8 if (recv) { LED_B_ON(); - cmd_send(CMD_ACK,recvlen>48?48:recvlen,0,0,recvbuf,48); + cmd_send(CMD_ACK,recvlen>48?48:recvlen,0,0,recvbuf,48); LED_B_OFF(); if (DEBUG) {