#include "iso14443crc.h"
#define RECEIVE_SAMPLES_TIMEOUT 2000
-#define ISO14443B_DMA_BUFFER_SIZE 512
//=============================================================================
// An ISO 14443 Type B tag. We listen for commands from the reader, using
} else if(Uart.shiftReg == 0x000) {
// this is an EOF byte
LED_A_OFF(); // Finished receiving
+ if (Uart.byteCnt != 0) {
return TRUE;
+ }
+ Uart.posCnt = 0;
+ Uart.state = STATE_ERROR_WAIT;
} else {
// this is an error
Uart.posCnt = 0;
uint8_t *receivedResponse = BigBuf_malloc(MAX_FRAME_SIZE);
// The DMA buffer, used to stream samples from the FPGA
- int8_t *dmaBuf = (int8_t*) BigBuf_malloc(ISO14443B_DMA_BUFFER_SIZE);
+ int8_t *dmaBuf = (int8_t*) BigBuf_malloc(DMA_BUFFER_SIZE);
// Set up the demodulator for tag -> reader responses.
DemodInit(receivedResponse);
// Setup and start DMA.
- FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE);
+ FpgaSetupSscDma((uint8_t*) dmaBuf, DMA_BUFFER_SIZE);
int8_t *upTo = dmaBuf;
- lastRxCounter = ISO14443B_DMA_BUFFER_SIZE;
+ lastRxCounter = DMA_BUFFER_SIZE;
// 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);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ);
for(;;) {
int behindBy = lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR;
if(behindBy > max) max = behindBy;
- while(((lastRxCounter-AT91C_BASE_PDC_SSC->PDC_RCR) & (ISO14443B_DMA_BUFFER_SIZE-1)) > 2) {
+ while(((lastRxCounter-AT91C_BASE_PDC_SSC->PDC_RCR) & (DMA_BUFFER_SIZE-1)) > 2) {
ci = upTo[0];
cq = upTo[1];
upTo += 2;
- if(upTo >= dmaBuf + ISO14443B_DMA_BUFFER_SIZE) {
+ if(upTo >= dmaBuf + DMA_BUFFER_SIZE) {
upTo = dmaBuf;
AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo;
- AT91C_BASE_PDC_SSC->PDC_RNCR = ISO14443B_DMA_BUFFER_SIZE;
+ AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
}
lastRxCounter -= 2;
if(lastRxCounter <= 0) {
- lastRxCounter += ISO14443B_DMA_BUFFER_SIZE;
+ lastRxCounter += DMA_BUFFER_SIZE;
}
samples += 2;
//Tracing
if (tracing && Demod.len > 0) {
uint8_t parity[MAX_PARITY_SIZE];
- GetParity(Demod.output, Demod.len, parity);
+ //GetParity(Demod.output, Demod.len, parity);
LogTrace(Demod.output, Demod.len, 0, 0, parity, FALSE);
}
}
}
-//-----------------------------------------------------------------------------
-// Read an ISO 14443B tag. We send it some set of commands, and record the
-// responses.
-// The command name is misleading, it actually decodes the reponse in HEX
-// into the output buffer (read the result using hexsamples, not hisamples)
-//
-// obsolete function only for test
-//-----------------------------------------------------------------------------
-void AcquireRawAdcSamplesIso14443b(uint32_t parameter)
-{
- uint8_t cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 }; // REQB with AFI=0, Request All, N=0
-
- SendRawCommand14443B(sizeof(cmd1),1,1,cmd1);
-}
-
-
/**
Convenience function to encode, transmit and trace iso 14443b comms
**/
// 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_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ);
SpinDelay(200);
// First command: wake up the tag using the INITIATE command
// LED_A_OFF();
if (Demod.len == 0) {
- DbpString("No response from tag");
- return;
+ DbpString("No response from tag");
+ return;
} else {
- Dbprintf("Randomly generated UID from tag (+ 2 byte CRC): %x %x %x",
+ Dbprintf("Randomly generated UID from tag (+ 2 byte CRC): %02x %02x %02x",
Demod.output[0], Demod.output[1],Demod.output[2]);
}
// There is a response, SELECT the uid
GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
// LED_A_OFF();
if (Demod.len != 3) {
- Dbprintf("Expected 3 bytes from tag, got %d", Demod.len);
- return;
+ Dbprintf("Expected 3 bytes from tag, got %d", Demod.len);
+ return;
}
// Check the CRC of the answer:
ComputeCrc14443(CRC_14443_B, Demod.output, 1 , &cmd1[2], &cmd1[3]);
if(cmd1[2] != Demod.output[1] || cmd1[3] != Demod.output[2]) {
- DbpString("CRC Error reading select response.");
- return;
+ DbpString("CRC Error reading select response.");
+ return;
}
// Check response from the tag: should be the same UID as the command we just sent:
if (cmd1[1] != Demod.output[0]) {
- Dbprintf("Bad response to SELECT from Tag, aborting: %x %x", cmd1[1], Demod.output[0]);
- return;
+ Dbprintf("Bad response to SELECT from Tag, aborting: %02x %02x", cmd1[1], Demod.output[0]);
+ return;
}
// Tag is now selected,
// First get the tag's UID:
GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
// LED_A_OFF();
if (Demod.len != 10) {
- Dbprintf("Expected 10 bytes from tag, got %d", Demod.len);
- return;
+ Dbprintf("Expected 10 bytes from tag, got %d", Demod.len);
+ return;
}
// The check the CRC of the answer (use cmd1 as temporary variable):
ComputeCrc14443(CRC_14443_B, Demod.output, 8, &cmd1[2], &cmd1[3]);
- if(cmd1[2] != Demod.output[8] || cmd1[3] != Demod.output[9]) {
- Dbprintf("CRC Error reading block! - Below: expected, got %x %x",
- (cmd1[2]<<8)+cmd1[3], (Demod.output[8]<<8)+Demod.output[9]);
+ if(cmd1[2] != Demod.output[8] || cmd1[3] != Demod.output[9]) {
+ Dbprintf("CRC Error reading block! Expected: %04x got: %04x",
+ (cmd1[2]<<8)+cmd1[3],
+ (Demod.output[8]<<8)+Demod.output[9]
+ );
// Do not return;, let's go on... (we should retry, maybe ?)
}
Dbprintf("Tag UID (64 bits): %08x %08x",
- (Demod.output[7]<<24) + (Demod.output[6]<<16) + (Demod.output[5]<<8) + Demod.output[4],
- (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0]);
+ (Demod.output[7]<<24) + (Demod.output[6]<<16) + (Demod.output[5]<<8) + Demod.output[4],
+ (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0]);
// Now loop to read all 16 blocks, address from 0 to last block
Dbprintf("Tag memory dump, block 0 to %d",dwLast);
// 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]) {
- Dbprintf("CRC Error reading block! - Below: expected, got %x %x",
- (cmd1[2]<<8)+cmd1[3], (Demod.output[4]<<8)+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 ?)
}
// Now print out the memory location:
- Dbprintf("Address=%x, Contents=%x, CRC=%x", i,
- (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0],
- (Demod.output[4]<<8)+Demod.output[5]);
- if (i == 0xff) {
- break;
- }
+ Dbprintf("Address=%02x, Contents=%08x, CRC=%04x", i,
+ (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0],
+ (Demod.output[4]<<8)+Demod.output[5]
+ );
+ if (i == 0xff) break;
i++;
}
}
* Memory usage for this function, (within BigBuf)
* Last Received command (reader->tag) - MAX_FRAME_SIZE
* Last Received command (tag->reader) - MAX_FRAME_SIZE
- * DMA Buffer - ISO14443B_DMA_BUFFER_SIZE
+ * DMA Buffer - DMA_BUFFER_SIZE
* Demodulated samples received - all the rest
*/
void RAMFUNC SnoopIso14443b(void)
set_tracing(TRUE);
// The DMA buffer, used to stream samples from the FPGA
- int8_t *dmaBuf = (int8_t*) BigBuf_malloc(ISO14443B_DMA_BUFFER_SIZE);
+ int8_t *dmaBuf = (int8_t*) BigBuf_malloc(DMA_BUFFER_SIZE);
int lastRxCounter;
int8_t *upTo;
int ci, cq;
Dbprintf(" Trace: %i bytes", BigBuf_max_traceLen());
Dbprintf(" Reader -> tag: %i bytes", MAX_FRAME_SIZE);
Dbprintf(" tag -> Reader: %i bytes", MAX_FRAME_SIZE);
- Dbprintf(" DMA: %i bytes", ISO14443B_DMA_BUFFER_SIZE);
+ Dbprintf(" DMA: %i bytes", DMA_BUFFER_SIZE);
// Signal field is off, no reader signal, no tag signal
LEDsoff();
// 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_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ | FPGA_HF_READER_RX_XCORR_SNOOP);
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
// Setup for the DMA.
FpgaSetupSsc();
upTo = dmaBuf;
- lastRxCounter = ISO14443B_DMA_BUFFER_SIZE;
- FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE);
+ lastRxCounter = DMA_BUFFER_SIZE;
+ FpgaSetupSscDma((uint8_t*) dmaBuf, DMA_BUFFER_SIZE);
uint8_t parity[MAX_PARITY_SIZE];
bool TagIsActive = FALSE;
// And now we loop, receiving samples.
for(;;) {
int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) &
- (ISO14443B_DMA_BUFFER_SIZE-1);
+ (DMA_BUFFER_SIZE-1);
if(behindBy > maxBehindBy) {
maxBehindBy = behindBy;
}
cq = upTo[1];
upTo += 2;
lastRxCounter -= 2;
- if(upTo >= dmaBuf + ISO14443B_DMA_BUFFER_SIZE) {
+ if(upTo >= dmaBuf + DMA_BUFFER_SIZE) {
upTo = dmaBuf;
- lastRxCounter += ISO14443B_DMA_BUFFER_SIZE;
+ lastRxCounter += DMA_BUFFER_SIZE;
AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf;
- AT91C_BASE_PDC_SSC->PDC_RNCR = ISO14443B_DMA_BUFFER_SIZE;
+ AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
WDT_HIT();
- if(behindBy > (9*ISO14443B_DMA_BUFFER_SIZE/10)) { // TODO: understand whether we can increase/decrease as we want or not?
- Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
+ if(behindBy > (9*DMA_BUFFER_SIZE/10)) { // TODO: understand whether we can increase/decrease as we want or not?
+ Dbprintf("blew circular buffer! behindBy=%d", behindBy);
break;
}
if(!tracing) {
if (!TagIsActive) { // no need to try decoding reader data if the tag is sending
if(Handle14443bUartBit(ci & 0x01)) {
if(triggered && tracing) {
- GetParity(Uart.output, Uart.byteCnt, parity);
+ //GetParity(Uart.output, Uart.byteCnt, parity);
LogTrace(Uart.output,Uart.byteCnt,samples, samples,parity,TRUE);
}
/* And ready to receive another command. */
}
if(Handle14443bUartBit(cq & 0x01)) {
if(triggered && tracing) {
- GetParity(Uart.output, Uart.byteCnt, parity);
+ //GetParity(Uart.output, Uart.byteCnt, parity);
LogTrace(Uart.output,Uart.byteCnt,samples, samples, parity, TRUE);
}
/* And ready to receive another command. */
}
if(!ReaderIsActive) { // no need to try decoding tag data if the reader is sending - and we cannot afford the time
- if(Handle14443bSamplesDemod(ci & 0xFE, cq & 0xFE)) {
+ if(Handle14443bSamplesDemod(ci, cq)) {
//Use samples as a time measurement
if(tracing)
{
uint8_t parity[MAX_PARITY_SIZE];
- GetParity(Demod.output, Demod.len, parity);
+ //GetParity(Demod.output, Demod.len, parity);
LogTrace(Demod.output, Demod.len,samples, samples, parity, FALSE);
}
triggered = TRUE;
// And ready to receive another response.
DemodReset();
}
- TagIsActive = (Demod.state > DEMOD_PHASE_REF_TRAINING);
+ TagIsActive = (Demod.state > DEMOD_GOT_FALLING_EDGE_OF_SOF);
}
}
*/
// if(!GETBIT(GPIO_LED_D)) { // if field is off
- // FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
+ // FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ);
// // Signal field is on with the appropriate LED
// LED_D_ON();
// SpinDelay(200);
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