git.zerfleddert.de Git - proxmark3-svn/blobdiff

index 5e770a776737af05c741d74ce06c86eb1979bade..0f36c7c7b33c6810371c6333db686d751337ce69 100644 (file)

--- a/armsrc/iso14443b.c

+++ b/armsrc/iso14443b.c

@@ -14,12 +14,14 @@

#include "proxmark3.h"

#include "apps.h"

#include "proxmark3.h"

#include "apps.h"

+#include "usb_cdc.h"

#include "util.h"

#include "string.h"

#include "iso14443crc.h"

#include "fpgaloader.h"

#include "util.h"

#include "string.h"

#include "iso14443crc.h"

#include "fpgaloader.h"

+#include "BigBuf.h"

-#define RECEIVE_SAMPLES_TIMEOUT 1000 // TR0 max is 256/fs = 256/(848kHz) = 302us or 64 samples from FPGA. 1000 seems to be much too high?

+#define RECEIVE_SAMPLES_TIMEOUT 64 // TR0 max is 256/fs = 256/(848kHz) = 302us or 64 samples from FPGA

#define ISO14443B_DMA_BUFFER_SIZE 128

// PCB Block number for APDUs

#define ISO14443B_DMA_BUFFER_SIZE 128

// PCB Block number for APDUs

@@ -585,9 +587,10 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq)

Demod.state = DEMOD_UNSYNCD;

} else {

LED_C_ON(); // Got SOF

Demod.state = DEMOD_UNSYNCD;

} else {

LED_C_ON(); // Got SOF

- Demod.state = DEMOD_AWAITING_START_BIT;

Demod.posCount = 0;

+ Demod.bitCount = 0;

Demod.len = 0;

+ Demod.state = DEMOD_AWAITING_START_BIT;

/* this had been used to add RSSI (Received Signal Strength Indication) to traces. Currently not implemented.

Demod.metricN = 0;

Demod.metric = 0;

/* this had been used to add RSSI (Received Signal Strength Indication) to traces. Currently not implemented.

Demod.metricN = 0;

Demod.metric = 0;

@@ -604,13 +607,16 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq)

case DEMOD_AWAITING_START_BIT:

Demod.posCount++;

MAKE_SOFT_DECISION();

case DEMOD_AWAITING_START_BIT:

Demod.posCount++;

MAKE_SOFT_DECISION();

- if(v > 0) {

- if(Demod.posCount > 3*2) { // max 19us between characters = 16 1/fs, max 3 etu after low phase of SOF = 24 1/fs

- Demod.state = DEMOD_UNSYNCD;

+ if (v > 0) {

+ if (Demod.posCount > 3*2) { // max 19us between characters = 16 1/fs, max 3 etu after low phase of SOF = 24 1/fs

LED_C_OFF();

+ if (Demod.bitCount == 0 && Demod.len == 0) { // received SOF only, this is valid for iClass/Picopass

+ return true;

+ } else {

+ Demod.state = DEMOD_UNSYNCD;

+ }

}

} else { // start bit detected

}

} else { // start bit detected

- Demod.bitCount = 0;

Demod.posCount = 1; // this was the first half

Demod.thisBit = v;

Demod.shiftReg = 0;

Demod.posCount = 1; // this was the first half

Demod.thisBit = v;

Demod.shiftReg = 0;

@@ -620,7 +626,7 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq)

case DEMOD_RECEIVING_DATA:

MAKE_SOFT_DECISION();

case DEMOD_RECEIVING_DATA:

MAKE_SOFT_DECISION();

- if(Demod.posCount == 0) { // first half of bit

+ if (Demod.posCount == 0) { // first half of bit

Demod.thisBit = v;

Demod.posCount = 1;

} else { // second half of bit

Demod.thisBit = v;

Demod.posCount = 1;

} else { // second half of bit

@@ -636,22 +642,23 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq)

Demod.shiftReg >>= 1;

- if(Demod.thisBit > 0) { // logic '1'

+ if (Demod.thisBit > 0) { // logic '1'

Demod.shiftReg |= 0x200;

}

Demod.bitCount++;

Demod.shiftReg |= 0x200;

}

Demod.bitCount++;

- if(Demod.bitCount == 10) {

+ if (Demod.bitCount == 10) {

uint16_t s = Demod.shiftReg;

- if((s & 0x200) && !(s & 0x001)) { // stop bit == '1', start bit == '0'

+ if ((s & 0x200) && !(s & 0x001)) { // stop bit == '1', start bit == '0'

uint8_t b = (s >> 1);

Demod.output[Demod.len] = b;

Demod.len++;

uint8_t b = (s >> 1);

Demod.output[Demod.len] = b;

Demod.len++;

+ Demod.bitCount = 0;

Demod.state = DEMOD_AWAITING_START_BIT;

} else {

Demod.state = DEMOD_UNSYNCD;

LED_C_OFF();

Demod.state = DEMOD_AWAITING_START_BIT;

} else {

Demod.state = DEMOD_UNSYNCD;

LED_C_OFF();

- if(s == 0x000) {

+ if (s == 0x000) {

// This is EOF (start, stop and all data bits == '0'

return true;

}

// This is EOF (start, stop and all data bits == '0'

return true;

}

@@ -692,8 +699,8 @@ static void DemodInit(uint8_t *data)

* Demodulate the samples we received from the tag, also log to tracebuffer

* quiet: set to 'true' to disable debug output

* Demodulate the samples we received from the tag, also log to tracebuffer

* quiet: set to 'true' to disable debug output

-static void GetSamplesFor14443bDemod(int n, bool quiet)

+static int GetSamplesFor14443bDemod(int timeout, bool quiet) {

+ int ret = 0;

int maxBehindBy = 0;

bool gotFrame = false;

int lastRxCounter, samples = 0;

int maxBehindBy = 0;

bool gotFrame = false;

int lastRxCounter, samples = 0;

@@ -716,7 +723,7 @@ static void GetSamplesFor14443bDemod(int n, bool quiet)

while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY))

// Setup and start DMA.

while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY))

// Setup and start DMA.

- FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);

+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);

FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE);

uint16_t *upTo = dmaBuf;

FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE);

uint16_t *upTo = dmaBuf;

@@ -725,7 +732,7 @@ static void GetSamplesFor14443bDemod(int n, bool quiet)

// Signal field is ON with the appropriate LED:

LED_D_ON();

// And put the FPGA in the appropriate mode

// Signal field is ON with the appropriate LED:

LED_D_ON();

// And put the FPGA in the appropriate mode

- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ);

+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_848_KHZ | FPGA_HF_READER_MODE_RECEIVE_IQ);

for(;;) {

int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (ISO14443B_DMA_BUFFER_SIZE-1);

for(;;) {

int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (ISO14443B_DMA_BUFFER_SIZE-1);

@@ -749,12 +756,15 @@ static void GetSamplesFor14443bDemod(int n, bool quiet)

}

samples++;

}

samples++;

- if(Handle14443bSamplesDemod(ci, cq)) {

+ if (Handle14443bSamplesDemod(ci, cq)) {

+ ret = Demod.len;

gotFrame = true;

break;

}

gotFrame = true;

break;

}

- if(samples > n) {

+ if(samples > timeout && Demod.state < DEMOD_PHASE_REF_TRAINING) {

+ ret = -1;

+ LED_C_OFF();

break;

}

break;

}

@@ -762,10 +772,14 @@ static void GetSamplesFor14443bDemod(int n, bool quiet)

FpgaDisableSscDma();

if (!quiet) Dbprintf("max behindby = %d, samples = %d, gotFrame = %d, Demod.len = %d, Demod.sumI = %d, Demod.sumQ = %d", maxBehindBy, samples, gotFrame, Demod.len, Demod.sumI, Demod.sumQ);

FpgaDisableSscDma();

if (!quiet) Dbprintf("max behindby = %d, samples = %d, gotFrame = %d, Demod.len = %d, Demod.sumI = %d, Demod.sumQ = %d", maxBehindBy, samples, gotFrame, Demod.len, Demod.sumI, Demod.sumQ);

- //Tracing

- if (Demod.len > 0) {

- LogTrace(Demod.output, Demod.len, 0, 0, NULL, false);

+ if (ret < 0) {

+ return ret;

}

+ //Tracing

+ LogTrace(Demod.output, Demod.len, 0, 0, NULL, false);

+ return ret;

}

@@ -774,28 +788,21 @@ static void GetSamplesFor14443bDemod(int n, bool quiet)

//-----------------------------------------------------------------------------

static void TransmitFor14443b(void)

{

//-----------------------------------------------------------------------------

static void TransmitFor14443b(void)

{

- int c;

- FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_TX);

- // Signal field is ON with the appropriate Red LED

- LED_D_ON();

- // Signal we are transmitting with the Green LED

+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_SHALLOW_MOD);

LED_B_ON();

- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX | FPGA_HF_READER_TX_SHALLOW_MOD);

- c = 0;

- for(;;) {

- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {

- AT91C_BASE_SSC->SSC_THR = ~ToSend[c];

- c++;

- if(c >= ToSendMax) {

- break;

- }

+ for(int c = 0; c < ToSendMax; c++) {

+ uint8_t data = ToSend[c];

+ for (int i = 0; i < 8; i++) {

+ uint16_t send_word = (data & 0x80) ? 0x0000 : 0xffff;

+ while (!(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY))) ;

+ AT91C_BASE_SSC->SSC_THR = send_word;

+ while (!(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY))) ;

+ AT91C_BASE_SSC->SSC_THR = send_word;

+ data <<= 1;

}

WDT_HIT();

}

WDT_HIT();

}

- LED_B_OFF(); // Finished sending

+ LED_B_OFF();

}

@@ -863,8 +870,7 @@ static void CodeAndTransmit14443bAsReader(const uint8_t *cmd, int len)

/* Sends an APDU to the tag

* TODO: check CRC and preamble

/* Sends an APDU to the tag

* TODO: check CRC and preamble

-int iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *response)

+int iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *response) {

LED_A_ON();

uint8_t message_frame[message_length + 4];

// PCB

LED_A_ON();

uint8_t message_frame[message_length + 4];

// PCB

@@ -879,21 +885,19 @@ int iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *respo

// send

CodeAndTransmit14443bAsReader(message_frame, message_length + 4);

// get response

// send

CodeAndTransmit14443bAsReader(message_frame, message_length + 4);

// get response

- GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

+ int ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

FpgaDisableTracing();

- if(Demod.len < 3)

- {

+ if (ret < 3) {

LED_A_OFF();

return 0;

}

// TODO: Check CRC

// copy response contents

LED_A_OFF();

return 0;

}

// TODO: Check CRC

// copy response contents

- if(response != NULL)

- {

+ if (response != NULL) {

memcpy(response, Demod.output, Demod.len);

}

LED_A_OFF();

memcpy(response, Demod.output, Demod.len);

}

LED_A_OFF();

- return Demod.len;

+ return ret;

}

/* Perform the ISO 14443 B Card Selection procedure

}

/* Perform the ISO 14443 B Card Selection procedure

@@ -912,10 +916,9 @@ int iso14443b_select_card()

// first, wake up the tag

CodeAndTransmit14443bAsReader(wupb, sizeof(wupb));

// first, wake up the tag

CodeAndTransmit14443bAsReader(wupb, sizeof(wupb));

- GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

+ int ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

// ATQB too short?

- if (Demod.len < 14)

- {

+ if (ret < 14) {

return 2;

}

return 2;

}

@@ -927,10 +930,9 @@ int iso14443b_select_card()

attrib[7] = Demod.output[10] & 0x0F;

ComputeCrc14443(CRC_14443_B, attrib, 9, attrib + 9, attrib + 10);

CodeAndTransmit14443bAsReader(attrib, sizeof(attrib));

attrib[7] = Demod.output[10] & 0x0F;

ComputeCrc14443(CRC_14443_B, attrib, 9, attrib + 9, attrib + 10);

CodeAndTransmit14443bAsReader(attrib, sizeof(attrib));

- GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

+ ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

// Answer to ATTRIB too short?

- if(Demod.len < 3)

- {

+ if (ret < 3) {

return 2;

}

// reset PCB block number

return 2;

}

// reset PCB block number

@@ -942,13 +944,13 @@ int iso14443b_select_card()

void iso14443b_setup() {

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

// Set up the synchronous serial port

void iso14443b_setup() {

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

// Set up the synchronous serial port

- FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_TX);

+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);

// connect Demodulated Signal to ADC:

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

// Signal field is on with the appropriate LED

LED_D_ON();

// connect Demodulated Signal to ADC:

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

// Signal field is on with the appropriate LED

LED_D_ON();

- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX | FPGA_HF_READER_TX_SHALLOW_MOD);

+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_SHALLOW_MOD);

DemodReset();

UartReset();

DemodReset();

UartReset();

@@ -976,12 +978,12 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)

SpinDelay(200);

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

SpinDelay(200);

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

- FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);

+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);

// Now give it time to spin up.

// Signal field is on with the appropriate LED

LED_D_ON();

// Now give it time to spin up.

// Signal field is on with the appropriate LED

LED_D_ON();

- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ);

+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_SHALLOW_MOD);

SpinDelay(200);

clear_trace();

SpinDelay(200);

clear_trace();

@@ -990,9 +992,9 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)

// First command: wake up the tag using the INITIATE command

uint8_t cmd1[] = {0x06, 0x00, 0x97, 0x5b};

CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1));

// First command: wake up the tag using the INITIATE command

uint8_t cmd1[] = {0x06, 0x00, 0x97, 0x5b};

CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1));

- GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

+ int ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

- if (Demod.len == 0) {

+ if (ret < 0) {

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

DbpString("No response from tag");

LEDsoff();

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

DbpString("No response from tag");

LEDsoff();

@@ -1008,7 +1010,7 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)

cmd1[1] = Demod.output[0];

ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]);

CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1));

cmd1[1] = Demod.output[0];

ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]);

CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1));

- GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

+ ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

if (Demod.len != 3) {

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

Dbprintf("Expected 3 bytes from tag, got %d", Demod.len);

if (Demod.len != 3) {

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

Dbprintf("Expected 3 bytes from tag, got %d", Demod.len);

@@ -1036,8 +1038,8 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)

cmd1[0] = 0x0B;

ComputeCrc14443(CRC_14443_B, cmd1, 1 , &cmd1[1], &cmd1[2]);

CodeAndTransmit14443bAsReader(cmd1, 3); // Only first three bytes for this one

cmd1[0] = 0x0B;

ComputeCrc14443(CRC_14443_B, cmd1, 1 , &cmd1[1], &cmd1[2]);

CodeAndTransmit14443bAsReader(cmd1, 3); // Only first three bytes for this one

- GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

- if (Demod.len != 10) {

+ ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

+ if (ret != 10) {

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

Dbprintf("Expected 10 bytes from tag, got %d", Demod.len);

LEDsoff();

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

Dbprintf("Expected 10 bytes from tag, got %d", Demod.len);

LEDsoff();

@@ -1067,8 +1069,8 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)

cmd1[1] = i;

ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]);

CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1));

cmd1[1] = i;

ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]);

CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1));

- GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

- if (Demod.len != 6) { // Check if we got an answer from the tag

+ ret = GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

+ if (ret != 6) { // Check if we got an answer from the tag

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

DbpString("Expected 6 bytes from tag, got less...");

LEDsoff();

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

DbpString("Expected 6 bytes from tag, got less...");

LEDsoff();

@@ -1076,7 +1078,7 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)

}

// The check the CRC of the answer (use cmd1 as temporary variable):

ComputeCrc14443(CRC_14443_B, Demod.output, 4, &cmd1[2], &cmd1[3]);

}

// The check the CRC of the answer (use cmd1 as temporary variable):

ComputeCrc14443(CRC_14443_B, Demod.output, 4, &cmd1[2], &cmd1[3]);

- if(cmd1[2] != Demod.output[4] || cmd1[3] != Demod.output[5]) {

+ if (cmd1[2] != Demod.output[4] || cmd1[3] != Demod.output[5]) {

Dbprintf("CRC Error reading block! Expected: %04x got: %04x",

(cmd1[2]<<8)+cmd1[3], (Demod.output[4]<<8)+Demod.output[5]);

// Do not return;, let's go on... (we should retry, maybe ?)

Dbprintf("CRC Error reading block! Expected: %04x got: %04x",

(cmd1[2]<<8)+cmd1[3], (Demod.output[4]<<8)+Demod.output[5]);

// Do not return;, let's go on... (we should retry, maybe ?)

@@ -1143,15 +1145,15 @@ void RAMFUNC SnoopIso14443b(void)

Dbprintf(" tag -> Reader: %i bytes", MAX_FRAME_SIZE);

Dbprintf(" DMA: %i bytes", ISO14443B_DMA_BUFFER_SIZE);

Dbprintf(" tag -> Reader: %i bytes", MAX_FRAME_SIZE);

Dbprintf(" DMA: %i bytes", ISO14443B_DMA_BUFFER_SIZE);

- // Signal field is off, no reader signal, no tag signal

- LEDsoff();

+ // Signal field is off

+ LED_D_OFF();

// And put the FPGA in the appropriate mode

- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ | FPGA_HF_READER_RX_XCORR_SNOOP);

+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_848_KHZ | FPGA_HF_READER_MODE_SNOOP_IQ);

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

// Setup for the DMA.

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

// Setup for the DMA.

- FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);

+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);

upTo = dmaBuf;

lastRxCounter = ISO14443B_DMA_BUFFER_SIZE;

FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE);

upTo = dmaBuf;

lastRxCounter = ISO14443B_DMA_BUFFER_SIZE;

FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE);

@@ -1218,8 +1220,8 @@ void RAMFUNC SnoopIso14443b(void)

ReaderIsActive = (Uart.state > STATE_GOT_FALLING_EDGE_OF_SOF);

}

ReaderIsActive = (Uart.state > STATE_GOT_FALLING_EDGE_OF_SOF);

}

- if(!ReaderIsActive && triggered) { // no need to try decoding tag data if the reader is sending or not yet triggered

- if(Handle14443bSamplesDemod(ci/2, cq/2)) {

+ if (!ReaderIsActive && triggered) { // no need to try decoding tag data if the reader is sending or not yet triggered

+ if (Handle14443bSamplesDemod(ci/2, cq/2) >= 0) {

//Use samples as a time measurement

LogTrace(Demod.output, Demod.len, samples, samples, NULL, false);

// And ready to receive another response.

//Use samples as a time measurement

LogTrace(Demod.output, Demod.len, samples, samples, NULL, false);

// And ready to receive another response.

@@ -1255,12 +1257,14 @@ void RAMFUNC SnoopIso14443b(void)

void SendRawCommand14443B(uint32_t datalen, uint32_t recv, uint8_t powerfield, uint8_t data[])

{

void SendRawCommand14443B(uint32_t datalen, uint32_t recv, uint8_t powerfield, uint8_t data[])

{

+ LED_A_ON();

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

// switch field on and give tag some time to power up

LED_D_ON();

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

// switch field on and give tag some time to power up

LED_D_ON();

- FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_TX);

+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_SHALLOW_MOD);

+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);

SpinDelay(10);

if (datalen){

SpinDelay(10);

if (datalen){

@@ -1268,19 +1272,21 @@ void SendRawCommand14443B(uint32_t datalen, uint32_t recv, uint8_t powerfield, u

CodeAndTransmit14443bAsReader(data, datalen);

- if(recv) {

- GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, true);

+ if (recv) {

+ int ret = GetSamplesFor14443bDemod(5*RECEIVE_SAMPLES_TIMEOUT, true);

FpgaDisableTracing();

uint16_t iLen = MIN(Demod.len, USB_CMD_DATA_SIZE);

FpgaDisableTracing();

uint16_t iLen = MIN(Demod.len, USB_CMD_DATA_SIZE);

- cmd_send(CMD_ACK, iLen, 0, 0, Demod.output, iLen);

+ cmd_send(CMD_ACK, ret, 0, 0, Demod.output, iLen);

}

FpgaDisableTracing();

}

FpgaDisableTracing();

}

- if(!powerfield) {

+ if (!powerfield) {

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

LED_D_OFF();

}

FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

LED_D_OFF();

}

+ LED_A_OFF();

}