X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/463871be6e6e2a23c8a7391aac47fa1048d5ca11..02ab5afa8701ecc9434e7d8c30850d0d4ec5903f:/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) {