+//=============================================================================
+// An ISO15693 decoder for reader commands.
+//
+// This function is called 4 times per bit (every 2 subcarrier cycles).
+// Subcarrier frequency fs is 848kHz, 1/fs = 1,18us, i.e. function is called every 2,36us
+// LED handling:
+// LED B -> ON once we have received the SOF and are expecting the rest.
+// LED B -> OFF once we have received EOF or are in error state or unsynced
+//
+// Returns: true if we received a EOF
+// false if we are still waiting for some more
+//=============================================================================
+
+typedef struct DecodeReader {
+ enum {
+ STATE_READER_UNSYNCD,
+ STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF,
+ STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF,
+ STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF,
+ STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF,
+ STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4,
+ STATE_READER_RECEIVE_DATA_1_OUT_OF_4,
+ STATE_READER_RECEIVE_DATA_1_OUT_OF_256,
+ STATE_READER_RECEIVE_JAMMING
+ } state;
+ enum {
+ CODING_1_OUT_OF_4,
+ CODING_1_OUT_OF_256
+ } Coding;
+ uint8_t shiftReg;
+ uint8_t bitCount;
+ int byteCount;
+ int byteCountMax;
+ int posCount;
+ int sum1, sum2;
+ uint8_t *output;
+ uint8_t jam_search_len;
+ uint8_t *jam_search_string;
+} DecodeReader_t;
+
+
+static void DecodeReaderInit(DecodeReader_t* DecodeReader, uint8_t *data, uint16_t max_len, uint8_t jam_search_len, uint8_t *jam_search_string) {
+ DecodeReader->output = data;
+ DecodeReader->byteCountMax = max_len;
+ DecodeReader->state = STATE_READER_UNSYNCD;
+ DecodeReader->byteCount = 0;
+ DecodeReader->bitCount = 0;
+ DecodeReader->posCount = 1;
+ DecodeReader->shiftReg = 0;
+ DecodeReader->jam_search_len = jam_search_len;
+ DecodeReader->jam_search_string = jam_search_string;
+}
+
+
+static void DecodeReaderReset(DecodeReader_t* DecodeReader) {
+ DecodeReader->state = STATE_READER_UNSYNCD;
+}
+
+
+static int inline __attribute__((always_inline)) Handle15693SampleFromReader(bool bit, DecodeReader_t *DecodeReader) {
+ switch (DecodeReader->state) {
+ case STATE_READER_UNSYNCD:
+ // wait for unmodulated carrier
+ if (bit) {
+ DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
+ }
+ break;
+
+ case STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF:
+ if (!bit) {
+ // we went low, so this could be the beginning of a SOF
+ DecodeReader->posCount = 1;
+ DecodeReader->state = STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF;
+ }
+ break;
+
+ case STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF:
+ DecodeReader->posCount++;
+ if (bit) { // detected rising edge
+ if (DecodeReader->posCount < 4) { // rising edge too early (nominally expected at 5)
+ DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
+ } else { // SOF
+ DecodeReader->state = STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF;
+ }
+ } else {
+ if (DecodeReader->posCount > 5) { // stayed low for too long
+ DecodeReaderReset(DecodeReader);
+ } else {
+ // do nothing, keep waiting
+ }
+ }
+ break;
+
+ case STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF:
+ DecodeReader->posCount++;
+ if (!bit) { // detected a falling edge
+ if (DecodeReader->posCount < 20) { // falling edge too early (nominally expected at 21 earliest)
+ DecodeReaderReset(DecodeReader);
+ } else if (DecodeReader->posCount < 23) { // SOF for 1 out of 4 coding
+ DecodeReader->Coding = CODING_1_OUT_OF_4;
+ DecodeReader->state = STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF;
+ } else if (DecodeReader->posCount < 28) { // falling edge too early (nominally expected at 29 latest)
+ DecodeReaderReset(DecodeReader);
+ } else { // SOF for 1 out of 256 coding
+ DecodeReader->Coding = CODING_1_OUT_OF_256;
+ DecodeReader->state = STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF;
+ }
+ } else {
+ if (DecodeReader->posCount > 29) { // stayed high for too long
+ DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
+ } else {
+ // do nothing, keep waiting
+ }
+ }
+ break;
+
+ case STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF:
+ DecodeReader->posCount++;
+ if (bit) { // detected rising edge
+ if (DecodeReader->Coding == CODING_1_OUT_OF_256) {
+ if (DecodeReader->posCount < 32) { // rising edge too early (nominally expected at 33)
+ DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
+ } else {
+ DecodeReader->posCount = 1;
+ DecodeReader->bitCount = 0;
+ DecodeReader->byteCount = 0;
+ DecodeReader->sum1 = 1;
+ DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_256;
+ LED_B_ON();
+ }
+ } else { // CODING_1_OUT_OF_4
+ if (DecodeReader->posCount < 24) { // rising edge too early (nominally expected at 25)
+ DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
+ } else {
+ DecodeReader->posCount = 1;
+ DecodeReader->state = STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4;
+ }
+ }
+ } else {
+ if (DecodeReader->Coding == CODING_1_OUT_OF_256) {
+ if (DecodeReader->posCount > 34) { // signal stayed low for too long
+ DecodeReaderReset(DecodeReader);
+ } else {
+ // do nothing, keep waiting
+ }
+ } else { // CODING_1_OUT_OF_4
+ if (DecodeReader->posCount > 26) { // signal stayed low for too long
+ DecodeReaderReset(DecodeReader);
+ } else {
+ // do nothing, keep waiting
+ }
+ }
+ }
+ break;
+
+ case STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4:
+ DecodeReader->posCount++;
+ if (bit) {
+ if (DecodeReader->posCount == 9) {
+ DecodeReader->posCount = 1;
+ DecodeReader->bitCount = 0;
+ DecodeReader->byteCount = 0;
+ DecodeReader->sum1 = 1;
+ DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_4;
+ LED_B_ON();
+ } else {
+ // do nothing, keep waiting
+ }
+ } else { // unexpected falling edge
+ DecodeReaderReset(DecodeReader);
+ }
+ break;
+
+ case STATE_READER_RECEIVE_DATA_1_OUT_OF_4:
+ DecodeReader->posCount++;
+ if (DecodeReader->posCount == 1) {
+ DecodeReader->sum1 = bit?1:0;
+ } else if (DecodeReader->posCount <= 4) {
+ if (bit) DecodeReader->sum1++;
+ } else if (DecodeReader->posCount == 5) {
+ DecodeReader->sum2 = bit?1:0;
+ } else {
+ if (bit) DecodeReader->sum2++;
+ }
+ if (DecodeReader->posCount == 8) {
+ DecodeReader->posCount = 0;
+ if (DecodeReader->sum1 <= 1 && DecodeReader->sum2 >= 3) { // EOF
+ LED_B_OFF(); // Finished receiving
+ DecodeReaderReset(DecodeReader);
+ if (DecodeReader->byteCount != 0) {
+ return true;
+ }
+ } else if (DecodeReader->sum1 >= 3 && DecodeReader->sum2 <= 1) { // detected a 2bit position
+ DecodeReader->shiftReg >>= 2;
+ DecodeReader->shiftReg |= (DecodeReader->bitCount << 6);
+ }
+ if (DecodeReader->bitCount == 15) { // we have a full byte
+ DecodeReader->output[DecodeReader->byteCount++] = DecodeReader->shiftReg;
+ if (DecodeReader->byteCount > DecodeReader->byteCountMax) {
+ // buffer overflow, give up
+ LED_B_OFF();
+ DecodeReaderReset(DecodeReader);
+ }
+ DecodeReader->bitCount = 0;
+ DecodeReader->shiftReg = 0;
+ if (DecodeReader->byteCount == DecodeReader->jam_search_len) {
+ if (!memcmp(DecodeReader->output, DecodeReader->jam_search_string, DecodeReader->jam_search_len)) {
+ LED_D_ON();
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_JAM);
+ DecodeReader->state = STATE_READER_RECEIVE_JAMMING;
+ }
+ }
+ } else {
+ DecodeReader->bitCount++;
+ }
+ }
+ break;
+
+ case STATE_READER_RECEIVE_DATA_1_OUT_OF_256:
+ DecodeReader->posCount++;
+ if (DecodeReader->posCount == 1) {
+ DecodeReader->sum1 = bit?1:0;
+ } else if (DecodeReader->posCount <= 4) {
+ if (bit) DecodeReader->sum1++;
+ } else if (DecodeReader->posCount == 5) {
+ DecodeReader->sum2 = bit?1:0;
+ } else if (bit) {
+ DecodeReader->sum2++;
+ }
+ if (DecodeReader->posCount == 8) {
+ DecodeReader->posCount = 0;
+ if (DecodeReader->sum1 <= 1 && DecodeReader->sum2 >= 3) { // EOF
+ LED_B_OFF(); // Finished receiving
+ DecodeReaderReset(DecodeReader);
+ if (DecodeReader->byteCount != 0) {
+ return true;
+ }
+ } else if (DecodeReader->sum1 >= 3 && DecodeReader->sum2 <= 1) { // detected the bit position
+ DecodeReader->shiftReg = DecodeReader->bitCount;
+ }
+ if (DecodeReader->bitCount == 255) { // we have a full byte
+ DecodeReader->output[DecodeReader->byteCount++] = DecodeReader->shiftReg;
+ if (DecodeReader->byteCount > DecodeReader->byteCountMax) {
+ // buffer overflow, give up
+ LED_B_OFF();
+ DecodeReaderReset(DecodeReader);
+ }
+ if (DecodeReader->byteCount == DecodeReader->jam_search_len) {
+ if (!memcmp(DecodeReader->output, DecodeReader->jam_search_string, DecodeReader->jam_search_len)) {
+ LED_D_ON();
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_JAM);
+ DecodeReader->state = STATE_READER_RECEIVE_JAMMING;
+ }
+ }
+ }
+ DecodeReader->bitCount++;
+ }
+ break;
+
+ case STATE_READER_RECEIVE_JAMMING:
+ DecodeReader->posCount++;
+ if (DecodeReader->Coding == CODING_1_OUT_OF_4) {
+ if (DecodeReader->posCount == 7*16) { // 7 bits jammed
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SNOOP_AMPLITUDE); // stop jamming
+ // FpgaDisableTracing();
+ LED_D_OFF();
+ } else if (DecodeReader->posCount == 8*16) {
+ DecodeReader->posCount = 0;
+ DecodeReader->output[DecodeReader->byteCount++] = 0x00;
+ DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_4;
+ }
+ } else {
+ if (DecodeReader->posCount == 7*256) { // 7 bits jammend
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SNOOP_AMPLITUDE); // stop jamming
+ LED_D_OFF();
+ } else if (DecodeReader->posCount == 8*256) {
+ DecodeReader->posCount = 0;
+ DecodeReader->output[DecodeReader->byteCount++] = 0x00;
+ DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_256;
+ }
+ }
+ break;
+
+ default:
+ LED_B_OFF();
+ DecodeReaderReset(DecodeReader);
+ break;
+ }
+
+ return false;
+}
+
+
+//-----------------------------------------------------------------------------
+// Receive a command (from the reader to us, where we are the simulated tag),
+// and store it in the given buffer, up to the given maximum length. Keeps
+// spinning, waiting for a well-framed command, until either we get one
+// (returns len) or someone presses the pushbutton on the board (returns -1).
+//
+// Assume that we're called with the SSC (to the FPGA) and ADC path set
+// correctly.
+//-----------------------------------------------------------------------------
+
+int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time) {
+ int samples = 0;
+ bool gotFrame = false;
+ uint8_t b;
+
+ uint8_t dmaBuf[ISO15693_DMA_BUFFER_SIZE];
+
+ // the decoder data structure
+ DecodeReader_t DecodeReader = {0};
+ DecodeReaderInit(&DecodeReader, received, max_len, 0, NULL);
+
+ // wait for last transfer to complete
+ while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY));
+
+ LED_D_OFF();
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
+
+ // clear receive register and wait for next transfer
+ uint32_t temp = AT91C_BASE_SSC->SSC_RHR;
+ (void) temp;
+ while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)) ;
+
+ uint32_t dma_start_time = GetCountSspClk() & 0xfffffff8;
+
+ // Setup and start DMA.
+ FpgaSetupSscDma(dmaBuf, ISO15693_DMA_BUFFER_SIZE);
+ uint8_t *upTo = dmaBuf;
+
+ for (;;) {
+ uint16_t behindBy = ((uint8_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1);
+
+ if (behindBy == 0) continue;
+
+ b = *upTo++;
+ if (upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content.
+ upTo = dmaBuf; // start reading the circular buffer from the beginning
+ if (behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) {
+ Dbprintf("About to blow circular buffer - aborted! behindBy=%d", behindBy);
+ break;
+ }
+ }
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated.
+ AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and
+ AT91C_BASE_PDC_SSC->PDC_RNCR = ISO15693_DMA_BUFFER_SIZE; // DMA Next Counter registers
+ }
+
+ for (int i = 7; i >= 0; i--) {
+ if (Handle15693SampleFromReader((b >> i) & 0x01, &DecodeReader)) {
+ *eof_time = dma_start_time + samples - DELAY_READER_TO_ARM; // end of EOF
+ gotFrame = true;
+ break;
+ }
+ samples++;
+ }
+
+ if (gotFrame) {
+ break;
+ }
+
+ if (BUTTON_PRESS()) {
+ DecodeReader.byteCount = -1;
+ break;
+ }
+
+ WDT_HIT();
+ }
+
+ FpgaDisableSscDma();
+
+ if (DEBUG) Dbprintf("samples = %d, gotFrame = %d, Decoder: state = %d, len = %d, bitCount = %d, posCount = %d",
+ samples, gotFrame, DecodeReader.state, DecodeReader.byteCount, DecodeReader.bitCount, DecodeReader.posCount);
+
+ if (DecodeReader.byteCount > 0) {
+ uint32_t sof_time = *eof_time
+ - DecodeReader.byteCount * (DecodeReader.Coding==CODING_1_OUT_OF_4?128:2048) // time for byte transfers
+ - 32 // time for SOF transfer
+ - 16; // time for EOF transfer
+ LogTrace_ISO15693(DecodeReader.output, DecodeReader.byteCount, sof_time*32, *eof_time*32, NULL, true);
+ }
+
+ return DecodeReader.byteCount;
+}
+
+
+// Construct an identify (Inventory) request, which is the first
+// thing that you must send to a tag to get a response.
+static void BuildIdentifyRequest(uint8_t *cmd) {
+ uint16_t crc;
+ // one sub-carrier, inventory, 1 slot, fast rate
+ cmd[0] = ISO15693_REQ_INVENTORY | ISO15693_REQINV_SLOT1 | ISO15693_REQ_DATARATE_HIGH;
+ // inventory command code
+ cmd[1] = 0x01;
+ // no mask
+ cmd[2] = 0x00;
+ //Now the CRC
+ crc = Iso15693Crc(cmd, 3);
+ cmd[3] = crc & 0xff;
+ cmd[4] = crc >> 8;
+}
+
+
+//-----------------------------------------------------------------------------
+// Start to read an ISO 15693 tag. We send an identify request, then wait
+// for the response. The response is not demodulated, just left in the buffer
+// so that it can be downloaded to a PC and processed there.
+//-----------------------------------------------------------------------------
+void AcquireRawAdcSamplesIso15693(void) {
+ LED_A_ON();
+
+ uint8_t *dest = BigBuf_get_addr();
+
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER);
+ LED_D_ON();
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+
+ uint8_t cmd[5];
+ BuildIdentifyRequest(cmd);
+ CodeIso15693AsReader(cmd, sizeof(cmd));
+
+ // Give the tags time to energize
+ SpinDelay(100);
+
+ // Now send the command
+ uint32_t start_time = 0;
+ TransmitTo15693Tag(ToSend, ToSendMax, &start_time);
+
+ // wait for last transfer to complete
+ while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY)) ;
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_424_KHZ | FPGA_HF_READER_MODE_RECEIVE_AMPLITUDE);
+
+ for(int c = 0; c < 4000; ) {
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ uint16_t r = AT91C_BASE_SSC->SSC_RHR;
+ dest[c++] = r >> 5;
+ }
+ }
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LEDsoff();
+}
+
+
+void SnoopIso15693(uint8_t jam_search_len, uint8_t *jam_search_string) {
+
+ LED_A_ON();
+
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+
+ clear_trace();
+ set_tracing(true);
+
+ // The DMA buffer, used to stream samples from the FPGA
+ uint16_t dmaBuf[ISO15693_DMA_BUFFER_SIZE];
+
+ // Count of samples received so far, so that we can include timing
+ // information in the trace buffer.
+ int samples = 0;
+
+ DecodeTag_t DecodeTag = {0};
+ uint8_t response[ISO15693_MAX_RESPONSE_LENGTH];
+ DecodeTagInit(&DecodeTag, response, sizeof(response));
+
+ DecodeReader_t DecodeReader = {0};
+ uint8_t cmd[ISO15693_MAX_COMMAND_LENGTH];
+ DecodeReaderInit(&DecodeReader, cmd, sizeof(cmd), jam_search_len, jam_search_string);
+
+ // Print some debug information about the buffer sizes
+ if (DEBUG) {
+ Dbprintf("Snooping buffers initialized:");
+ Dbprintf(" Trace: %i bytes", BigBuf_max_traceLen());
+ Dbprintf(" Reader -> tag: %i bytes", ISO15693_MAX_COMMAND_LENGTH);
+ Dbprintf(" tag -> Reader: %i bytes", ISO15693_MAX_RESPONSE_LENGTH);
+ Dbprintf(" DMA: %i bytes", ISO15693_DMA_BUFFER_SIZE * sizeof(uint16_t));
+ }
+ Dbprintf("Snoop started. Press PM3 Button to stop.");
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SNOOP_AMPLITUDE);
+ LED_D_OFF();
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
+ StartCountSspClk();
+ FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE);
+
+ bool TagIsActive = false;
+ bool ReaderIsActive = false;
+ bool ExpectTagAnswer = false;
+ uint32_t dma_start_time = 0;
+ uint16_t *upTo = dmaBuf;
+
+ uint16_t max_behindBy = 0;
+
+ // And now we loop, receiving samples.
+ for(;;) {
+ uint16_t behindBy = ((uint16_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1);
+ if (behindBy > max_behindBy) {
+ max_behindBy = behindBy;
+ }
+
+ if (behindBy == 0) continue;
+
+ samples++;
+ if (samples == 1) {
+ // DMA has transferred the very first data
+ dma_start_time = GetCountSspClk() & 0xfffffff0;
+ }
+
+ uint16_t snoopdata = *upTo++;
+
+ if (upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content.
+ upTo = dmaBuf; // start reading the circular buffer from the beginning
+ if (behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) {
+ // FpgaDisableTracing();
+ Dbprintf("About to blow circular buffer - aborted! behindBy=%d, samples=%d", behindBy, samples);
+ break;
+ }
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated.
+ AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and
+ AT91C_BASE_PDC_SSC->PDC_RNCR = ISO15693_DMA_BUFFER_SIZE; // DMA Next Counter registers
+ WDT_HIT();
+ if (BUTTON_PRESS()) {
+ DbpString("Snoop stopped.");
+ break;
+ }
+ }
+ }
+
+ if (!TagIsActive) { // no need to try decoding reader data if the tag is sending
+ if (Handle15693SampleFromReader(snoopdata & 0x02, &DecodeReader)) {
+ // FpgaDisableSscDma();
+ uint32_t eof_time = dma_start_time + samples*16 + 8 - DELAY_READER_TO_ARM_SNOOP; // end of EOF
+ if (DecodeReader.byteCount > 0) {
+ uint32_t sof_time = eof_time
+ - DecodeReader.byteCount * (DecodeReader.Coding==CODING_1_OUT_OF_4?128*16:2048*16) // time for byte transfers
+ - 32*16 // time for SOF transfer
+ - 16*16; // time for EOF transfer
+ LogTrace_ISO15693(DecodeReader.output, DecodeReader.byteCount, sof_time*4, eof_time*4, NULL, true);
+ }
+ /* And ready to receive another command. */
+ DecodeReaderReset(&DecodeReader);
+ /* And also reset the demod code, which might have been */
+ /* false-triggered by the commands from the reader. */
+ DecodeTagReset(&DecodeTag);
+ ReaderIsActive = false;
+ ExpectTagAnswer = true;
+ // upTo = dmaBuf;
+ // samples = 0;
+ // FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE);
+ // continue;
+ } else if (Handle15693SampleFromReader(snoopdata & 0x01, &DecodeReader)) {
+ // FpgaDisableSscDma();
+ uint32_t eof_time = dma_start_time + samples*16 + 16 - DELAY_READER_TO_ARM_SNOOP; // end of EOF
+ if (DecodeReader.byteCount > 0) {
+ uint32_t sof_time = eof_time
+ - DecodeReader.byteCount * (DecodeReader.Coding==CODING_1_OUT_OF_4?128*16:2048*16) // time for byte transfers
+ - 32*16 // time for SOF transfer
+ - 16*16; // time for EOF transfer
+ LogTrace_ISO15693(DecodeReader.output, DecodeReader.byteCount, sof_time*4, eof_time*4, NULL, true);
+ }
+ /* And ready to receive another command. */
+ DecodeReaderReset(&DecodeReader);
+ /* And also reset the demod code, which might have been */
+ /* false-triggered by the commands from the reader. */
+ DecodeTagReset(&DecodeTag);
+ ReaderIsActive = false;
+ ExpectTagAnswer = true;
+ // upTo = dmaBuf;
+ // samples = 0;
+ // FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE);
+ // continue;
+ } else {
+ ReaderIsActive = (DecodeReader.state >= STATE_READER_RECEIVE_DATA_1_OUT_OF_4);
+ }
+ }
+
+ if (!ReaderIsActive && ExpectTagAnswer) { // no need to try decoding tag data if the reader is currently sending or no answer expected yet
+ if (Handle15693SamplesFromTag(snoopdata >> 2, &DecodeTag)) {
+ // FpgaDisableSscDma();
+ uint32_t eof_time = dma_start_time + samples*16 - DELAY_TAG_TO_ARM_SNOOP; // end of EOF
+ if (DecodeTag.lastBit == SOF_PART2) {
+ eof_time -= 8*16; // needed 8 additional samples to confirm single SOF (iCLASS)
+ }
+ uint32_t sof_time = eof_time
+ - DecodeTag.len * 8 * 8 * 16 // time for byte transfers
+ - 32 * 16 // time for SOF transfer
+ - (DecodeTag.lastBit != SOF_PART2?32*16:0); // time for EOF transfer
+ LogTrace_ISO15693(DecodeTag.output, DecodeTag.len, sof_time*4, eof_time*4, NULL, false);
+ // And ready to receive another response.
+ DecodeTagReset(&DecodeTag);
+ DecodeReaderReset(&DecodeReader);
+ ExpectTagAnswer = false;
+ TagIsActive = false;
+ // upTo = dmaBuf;
+ // samples = 0;
+ // FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE);
+ // continue;
+ } else {
+ TagIsActive = (DecodeTag.state >= STATE_TAG_RECEIVING_DATA);
+ }
+ }
+
+ }
+
+ FpgaDisableSscDma();
+
+ DbpString("Snoop statistics:");
+ Dbprintf(" ExpectTagAnswer: %d, TagIsActive: %d, ReaderIsActive: %d", ExpectTagAnswer, TagIsActive, ReaderIsActive);
+ Dbprintf(" DecodeTag State: %d", DecodeTag.state);
+ Dbprintf(" DecodeTag byteCnt: %d", DecodeTag.len);
+ Dbprintf(" DecodeTag posCount: %d", DecodeTag.posCount);
+ Dbprintf(" DecodeReader State: %d", DecodeReader.state);
+ Dbprintf(" DecodeReader byteCnt: %d", DecodeReader.byteCount);
+ Dbprintf(" DecodeReader posCount: %d", DecodeReader.posCount);
+ Dbprintf(" Trace length: %d", BigBuf_get_traceLen());
+ Dbprintf(" Max behindBy: %d", max_behindBy);
+}
+
+
+// Initialize the proxmark as iso15k reader
+void Iso15693InitReader(void) {
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+
+ // switch field off and wait until tag resets
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+ SpinDelay(10);
+
+ // switch field on
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER);
+ LED_D_ON();
+
+ // initialize SSC and select proper AD input
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+
+ // give tags some time to energize
+ SpinDelay(250);
+}
+
+///////////////////////////////////////////////////////////////////////
+// ISO 15693 Part 3 - Air Interface
+// This section basically contains transmission and receiving of bits
+///////////////////////////////////////////////////////////////////////
+
+
+// uid is in transmission order (which is reverse of display order)
+static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber, uint8_t *cmd) {
+ uint16_t crc;
+ // If we set the Option_Flag in this request, the VICC will respond with the security status of the block
+ // followed by the block data
+ cmd[0] = ISO15693_REQ_OPTION | ISO15693_REQ_ADDRESS | ISO15693_REQ_DATARATE_HIGH;
+ // READ BLOCK command code
+ cmd[1] = ISO15693_READBLOCK;
+ // UID may be optionally specified here
+ // 64-bit UID
+ cmd[2] = uid[0];
+ cmd[3] = uid[1];
+ cmd[4] = uid[2];
+ cmd[5] = uid[3];
+ cmd[6] = uid[4];
+ cmd[7] = uid[5];
+ cmd[8] = uid[6];
+ cmd[9] = uid[7]; // 0xe0; // always e0 (not exactly unique)
+ // Block number to read
+ cmd[10] = blockNumber;
+ //Now the CRC
+ crc = Iso15693Crc(cmd, 11); // the crc needs to be calculated over 11 bytes
+ cmd[11] = crc & 0xff;
+ cmd[12] = crc >> 8;
+
+}
+
+
+// Now the VICC>VCD responses when we are simulating a tag
+static void BuildInventoryResponse(uint8_t *uid) {
+ uint8_t cmd[12];
+
+ uint16_t crc;
+
+ cmd[0] = 0; // No error, no protocol format extension
+ cmd[1] = 0; // DSFID (data storage format identifier). 0x00 = not supported
+ // 64-bit UID
+ cmd[2] = uid[7]; //0x32;
+ cmd[3] = uid[6]; //0x4b;
+ cmd[4] = uid[5]; //0x03;
+ cmd[5] = uid[4]; //0x01;
+ cmd[6] = uid[3]; //0x00;
+ cmd[7] = uid[2]; //0x10;
+ cmd[8] = uid[1]; //0x05;
+ cmd[9] = uid[0]; //0xe0;
+ //Now the CRC
+ crc = Iso15693Crc(cmd, 10);
+ cmd[10] = crc & 0xff;
+ cmd[11] = crc >> 8;
+
+ CodeIso15693AsTag(cmd, sizeof(cmd));
+}
+
+// Universal Method for sending to and recv bytes from a tag
+// init ... should we initialize the reader?
+// speed ... 0 low speed, 1 hi speed
+// *recv will contain the tag's answer
+// return: length of received data, or -1 for timeout
+int SendDataTag(uint8_t *send, int sendlen, bool init, bool speed_fast, uint8_t *recv, uint16_t max_recv_len, uint32_t start_time, uint16_t timeout, uint32_t *eof_time) {
+
+ if (init) {
+ Iso15693InitReader();
+ StartCountSspClk();
+ }
+
+ int answerLen = 0;
+
+ if (speed_fast) {
+ // high speed (1 out of 4)
+ CodeIso15693AsReader(send, sendlen);
+ } else {
+ // low speed (1 out of 256)
+ CodeIso15693AsReader256(send, sendlen);
+ }
+
+ TransmitTo15693Tag(ToSend, ToSendMax, &start_time);
+ uint32_t end_time = start_time + 32*(8*ToSendMax-4); // substract the 4 padding bits after EOF
+ LogTrace_ISO15693(send, sendlen, start_time*4, end_time*4, NULL, true);
+
+ // Now wait for a response
+ if (recv != NULL) {
+ answerLen = GetIso15693AnswerFromTag(recv, max_recv_len, timeout, eof_time);
+ }
+
+ return answerLen;
+}
+
+
+int SendDataTagEOF(uint8_t *recv, uint16_t max_recv_len, uint32_t start_time, uint16_t timeout, uint32_t *eof_time) {
+
+ int answerLen = 0;
+
+ CodeIso15693AsReaderEOF();
+
+ TransmitTo15693Tag(ToSend, ToSendMax, &start_time);
+ uint32_t end_time = start_time + 32*(8*ToSendMax-4); // substract the 4 padding bits after EOF
+ LogTrace_ISO15693(NULL, 0, start_time*4, end_time*4, NULL, true);
+
+ // Now wait for a response
+ if (recv != NULL) {
+ answerLen = GetIso15693AnswerFromTag(recv, max_recv_len, timeout, eof_time);
+ }
+
+ return answerLen;
+}
+
+
+// --------------------------------------------------------------------
+// Debug Functions
+// --------------------------------------------------------------------
+
+// Decodes a message from a tag and displays its metadata and content
+#define DBD15STATLEN 48
+void DbdecodeIso15693Answer(int len, uint8_t *d) {
+ char status[DBD15STATLEN+1]={0};
+ uint16_t crc;
+
+ if (len > 3) {
+ if (d[0] & ISO15693_RES_EXT)
+ strncat(status,"ProtExt ", DBD15STATLEN);
+ if (d[0] & ISO15693_RES_ERROR) {
+ // error
+ strncat(status,"Error ", DBD15STATLEN);
+ switch (d[1]) {
+ case 0x01:
+ strncat(status,"01:notSupp", DBD15STATLEN);
+ break;
+ case 0x02:
+ strncat(status,"02:notRecog", DBD15STATLEN);
+ break;
+ case 0x03:
+ strncat(status,"03:optNotSupp", DBD15STATLEN);
+ break;
+ case 0x0f:
+ strncat(status,"0f:noInfo", DBD15STATLEN);
+ break;
+ case 0x10:
+ strncat(status,"10:doesn'tExist", DBD15STATLEN);
+ break;
+ case 0x11:
+ strncat(status,"11:lockAgain", DBD15STATLEN);
+ break;
+ case 0x12:
+ strncat(status,"12:locked", DBD15STATLEN);
+ break;
+ case 0x13:
+ strncat(status,"13:progErr", DBD15STATLEN);
+ break;
+ case 0x14:
+ strncat(status,"14:lockErr", DBD15STATLEN);
+ break;
+ default:
+ strncat(status,"unknownErr", DBD15STATLEN);
+ }
+ strncat(status," ", DBD15STATLEN);
+ } else {
+ strncat(status,"NoErr ", DBD15STATLEN);
+ }
+
+ crc=Iso15693Crc(d,len-2);
+ if ( (( crc & 0xff ) == d[len-2]) && (( crc >> 8 ) == d[len-1]) )
+ strncat(status,"CrcOK",DBD15STATLEN);
+ else
+ strncat(status,"CrcFail!",DBD15STATLEN);
+
+ Dbprintf("%s",status);
+ }
+}
+
+
+
+///////////////////////////////////////////////////////////////////////
+// Functions called via USB/Client
+///////////////////////////////////////////////////////////////////////
+
+void SetDebugIso15693(uint32_t debug) {
+ DEBUG=debug;
+ Dbprintf("Iso15693 Debug is now %s",DEBUG?"on":"off");
+ return;
+}
+
+
+//---------------------------------------------------------------------------------------
+// Simulate an ISO15693 reader, perform anti-collision and then attempt to read a sector.
+// all demodulation performed in arm rather than host. - greg
+//---------------------------------------------------------------------------------------
+void ReaderIso15693(uint32_t parameter) {
+
+ LED_A_ON();
+
+ set_tracing(true);
+
+ uint8_t TagUID[8] = {0x00};
+ uint8_t answer[ISO15693_MAX_RESPONSE_LENGTH];
+
+ // FIRST WE RUN AN INVENTORY TO GET THE TAG UID
+ // THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME
+
+ // Now send the IDENTIFY command
+ uint8_t cmd[5];
+ BuildIdentifyRequest(cmd);
+ uint32_t start_time = 0;
+ uint32_t eof_time;
+ int answerLen = SendDataTag(cmd, sizeof(cmd), true, true, answer, sizeof(answer), start_time, ISO15693_READER_TIMEOUT, &eof_time);
+ start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER;
+
+ if (answerLen >= 12) { // we should do a better check than this
+ TagUID[0] = answer[2];
+ TagUID[1] = answer[3];
+ TagUID[2] = answer[4];
+ TagUID[3] = answer[5];
+ TagUID[4] = answer[6];
+ TagUID[5] = answer[7];
+ TagUID[6] = answer[8]; // IC Manufacturer code
+ TagUID[7] = answer[9]; // always E0
+ }
+
+ Dbprintf("%d octets read from IDENTIFY request:", answerLen);
+ DbdecodeIso15693Answer(answerLen, answer);
+ Dbhexdump(answerLen, answer, false);
+
+ // UID is reverse
+ if (answerLen >= 12)
+ Dbprintf("UID = %02hX%02hX%02hX%02hX%02hX%02hX%02hX%02hX",
+ TagUID[7],TagUID[6],TagUID[5],TagUID[4],
+ TagUID[3],TagUID[2],TagUID[1],TagUID[0]);
+
+ // read all pages
+ if (answerLen >= 12 && DEBUG) {
+ for (int i = 0; i < 32; i++) { // sanity check, assume max 32 pages
+ uint8_t cmd[13];
+ BuildReadBlockRequest(TagUID, i, cmd);
+ answerLen = SendDataTag(cmd, sizeof(cmd), false, true, answer, sizeof(answer), start_time, ISO15693_READER_TIMEOUT, &eof_time);
+ start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER;
+ if (answerLen > 0) {
+ Dbprintf("READ SINGLE BLOCK %d returned %d octets:", i, answerLen);
+ DbdecodeIso15693Answer(answerLen, answer);
+ Dbhexdump(answerLen, answer, false);
+ if ( *((uint32_t*) answer) == 0x07160101 ) break; // exit on NoPageErr
+ }
+ }
+ }
+
+ // for the time being, switch field off to protect RDV4
+ // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+
+ LED_A_OFF();
+}
+
+
+// Initialize the proxmark as iso15k tag
+void Iso15693InitTag(void) {
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
+ LED_D_OFF();
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
+ StartCountSspClk();
+}
+
+
+// Simulate an ISO15693 TAG.
+// For Inventory command: print command and send Inventory Response with given UID
+// TODO: interpret other reader commands and send appropriate response
+void SimTagIso15693(uint32_t parameter, uint8_t *uid) {
+
+ LED_A_ON();
+
+ Iso15693InitTag();
+
+ // Build a suitable response to the reader INVENTORY command
+ BuildInventoryResponse(uid);
+
+ // Listen to reader
+ while (!BUTTON_PRESS()) {
+ uint8_t cmd[ISO15693_MAX_COMMAND_LENGTH];
+ uint32_t eof_time = 0, start_time = 0;
+ int cmd_len = GetIso15693CommandFromReader(cmd, sizeof(cmd), &eof_time);
+
+ if ((cmd_len >= 5) && (cmd[0] & ISO15693_REQ_INVENTORY) && (cmd[1] == ISO15693_INVENTORY)) { // TODO: check more flags
+ bool slow = !(cmd[0] & ISO15693_REQ_DATARATE_HIGH);
+ start_time = eof_time + DELAY_ISO15693_VCD_TO_VICC_SIM;
+ TransmitTo15693Reader(ToSend, ToSendMax, &start_time, 0, slow);
+ }
+
+ Dbprintf("%d bytes read from reader:", cmd_len);
+ Dbhexdump(cmd_len, cmd, false);
+ }
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+ LED_A_OFF();
+}
+
+
+// Since there is no standardized way of reading the AFI out of a tag, we will brute force it
+// (some manufactures offer a way to read the AFI, though)
+void BruteforceIso15693Afi(uint32_t speed) {
+ LED_A_ON();
+
+ uint8_t data[6];
+ uint8_t recv[ISO15693_MAX_RESPONSE_LENGTH];
+ int datalen = 0, recvlen = 0;
+ uint32_t eof_time;
+
+ // first without AFI
+ // Tags should respond without AFI and with AFI=0 even when AFI is active
+
+ data[0] = ISO15693_REQ_DATARATE_HIGH | ISO15693_REQ_INVENTORY | ISO15693_REQINV_SLOT1;
+ data[1] = ISO15693_INVENTORY;
+ data[2] = 0; // mask length
+ datalen = Iso15693AddCrc(data,3);
+ uint32_t start_time = GetCountSspClk();
+ recvlen = SendDataTag(data, datalen, true, speed, recv, sizeof(recv), 0, ISO15693_READER_TIMEOUT, &eof_time);
+ start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER;
+ WDT_HIT();
+ if (recvlen>=12) {
+ Dbprintf("NoAFI UID=%s", Iso15693sprintUID(NULL, &recv[2]));
+ }
+
+ // now with AFI
+
+ data[0] = ISO15693_REQ_DATARATE_HIGH | ISO15693_REQ_INVENTORY | ISO15693_REQINV_AFI | ISO15693_REQINV_SLOT1;
+ data[1] = ISO15693_INVENTORY;
+ data[2] = 0; // AFI
+ data[3] = 0; // mask length
+
+ for (int i = 0; i < 256; i++) {
+ data[2] = i & 0xFF;
+ datalen = Iso15693AddCrc(data,4);
+ recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), start_time, ISO15693_READER_TIMEOUT, &eof_time);
+ start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER;
+ WDT_HIT();
+ if (recvlen >= 12) {
+ Dbprintf("AFI=%i UID=%s", i, Iso15693sprintUID(NULL, &recv[2]));
+ }
+ }
+ Dbprintf("AFI Bruteforcing done.");
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+ LED_A_OFF();
+
+}
+
+// Allows to directly send commands to the tag via the client
+void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint8_t data[]) {
+
+ LED_A_ON();
+
+ int recvlen = 0;
+ uint8_t recvbuf[ISO15693_MAX_RESPONSE_LENGTH];
+ uint32_t eof_time;
+
+ uint16_t timeout;
+ bool request_answer = false;
+
+ switch (data[1]) {
+ case ISO15693_WRITEBLOCK:
+ case ISO15693_LOCKBLOCK:
+ case ISO15693_WRITE_MULTI_BLOCK:
+ case ISO15693_WRITE_AFI:
+ case ISO15693_LOCK_AFI:
+ case ISO15693_WRITE_DSFID:
+ case ISO15693_LOCK_DSFID:
+ timeout = ISO15693_READER_TIMEOUT_WRITE;
+ request_answer = data[0] & ISO15693_REQ_OPTION;
+ break;
+ default:
+ timeout = ISO15693_READER_TIMEOUT;
+ }
+
+ if (DEBUG) {
+ Dbprintf("SEND:");
+ Dbhexdump(datalen, data, false);
+ }
+
+ recvlen = SendDataTag(data, datalen, true, speed, (recv?recvbuf:NULL), sizeof(recvbuf), 0, timeout, &eof_time);
+
+ if (request_answer) { // send a single EOF to get the tag response
+ recvlen = SendDataTagEOF((recv?recvbuf:NULL), sizeof(recvbuf), 0, ISO15693_READER_TIMEOUT, &eof_time);
+ }
+
+ // for the time being, switch field off to protect rdv4.0
+ // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+
+ if (recv) {
+ if (DEBUG) {
+ Dbprintf("RECV:");
+ if (recvlen > 0) {
+ Dbhexdump(recvlen, recvbuf, false);
+ DbdecodeIso15693Answer(recvlen, recvbuf);
+ }
+ }
+ if (recvlen > ISO15693_MAX_RESPONSE_LENGTH) {
+ recvlen = ISO15693_MAX_RESPONSE_LENGTH;
+ }
+ cmd_send(CMD_ACK, recvlen, 0, 0, recvbuf, ISO15693_MAX_RESPONSE_LENGTH);
+ }
+
+ LED_A_OFF();
+}
+
+//-----------------------------------------------------------------------------
+// Work with "magic Chinese" card.
+//
+//-----------------------------------------------------------------------------
+
+// Set the UID on Magic ISO15693 tag (based on Iceman's LUA-script).
+void SetTag15693Uid(uint8_t *uid) {
+
+ LED_A_ON();
+
+ uint8_t cmd[4][9] = {
+ {ISO15693_REQ_DATARATE_HIGH, ISO15693_WRITEBLOCK, 0x3e, 0x00, 0x00, 0x00, 0x00},
+ {ISO15693_REQ_DATARATE_HIGH, ISO15693_WRITEBLOCK, 0x3f, 0x69, 0x96, 0x00, 0x00},
+ {ISO15693_REQ_DATARATE_HIGH, ISO15693_WRITEBLOCK, 0x38},
+ {ISO15693_REQ_DATARATE_HIGH, ISO15693_WRITEBLOCK, 0x39}
+ };
+
+ uint16_t crc;
+
+ int recvlen = 0;
+ uint8_t recvbuf[ISO15693_MAX_RESPONSE_LENGTH];
+ uint32_t eof_time;
+
+ // Command 3 : 022138u8u7u6u5 (where uX = uid byte X)
+ cmd[2][3] = uid[7];
+ cmd[2][4] = uid[6];
+ cmd[2][5] = uid[5];
+ cmd[2][6] = uid[4];
+
+ // Command 4 : 022139u4u3u2u1 (where uX = uid byte X)
+ cmd[3][3] = uid[3];
+ cmd[3][4] = uid[2];
+ cmd[3][5] = uid[1];
+ cmd[3][6] = uid[0];
+
+ uint32_t start_time = 0;
+
+ for (int i = 0; i < 4; i++) {
+ // Add the CRC
+ crc = Iso15693Crc(cmd[i], 7);
+ cmd[i][7] = crc & 0xff;
+ cmd[i][8] = crc >> 8;
+
+ recvlen = SendDataTag(cmd[i], sizeof(cmd[i]), i==0?true:false, true, recvbuf, sizeof(recvbuf), start_time, ISO15693_READER_TIMEOUT_WRITE, &eof_time);
+ start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER;
+ if (DEBUG) {
+ Dbprintf("SEND:");
+ Dbhexdump(sizeof(cmd[i]), cmd[i], false);
+ Dbprintf("RECV:");
+ if (recvlen > 0) {
+ Dbhexdump(recvlen, recvbuf, false);
+ DbdecodeIso15693Answer(recvlen, recvbuf);
+ }
+ }
+ // Note: need to know if we expect an answer from one of the magic commands
+ // if (recvlen < 0) {
+ // break;
+ // }
+ }
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+
+ cmd_send(CMD_ACK, recvlen, 0, 0, recvbuf, recvlen);
+ LED_A_OFF();
+}
+
+
+
+// --------------------------------------------------------------------
+// -- Misc & deprecated functions
+// --------------------------------------------------------------------
+
+/*
+
+// do not use; has a fix UID
+static void __attribute__((unused)) BuildSysInfoRequest(uint8_t *uid)
+{
+ uint8_t cmd[12];
+
+ uint16_t crc;
+ // If we set the Option_Flag in this request, the VICC will respond with the security status of the block
+ // followed by the block data
+ // one sub-carrier, inventory, 1 slot, fast rate
+ cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit
+ // System Information command code
+ cmd[1] = 0x2B;
projects / proxmark3-svn / blobdiff