//
// minimum time between the start bits of consecutive transfers from reader to tag: 7000 carrier (13.56Mhz) cycles
#define REQUEST_GUARD_TIME (7000/16 + 1)
//
// minimum time between the start bits of consecutive transfers from reader to tag: 7000 carrier (13.56Mhz) cycles
#define REQUEST_GUARD_TIME (7000/16 + 1)
-// minimum time between last modulation of tag and next start bit from reader to tag: 1172 carrier cycles
-#define FRAME_DELAY_TIME_PICC_TO_PCD (1172/16 + 1)
+// minimum time between last modulation of tag and next start bit from reader to tag: 1172 carrier cycles
+#define FRAME_DELAY_TIME_PICC_TO_PCD (1172/16 + 1)
// 8 ticks until bit_to_arm is assigned from curbit
// 8*16 ticks for the transfer from FPGA to ARM
// 4*16 ticks until we measure the time
// 8 ticks until bit_to_arm is assigned from curbit
// 8*16 ticks for the transfer from FPGA to ARM
// 4*16 ticks until we measure the time
-// - 8*16 ticks because we measure the time of the previous transfer
-#define DELAY_AIR2ARM_AS_READER (3 + 16 + 8 + 8*16 + 4*16 - 8*16)
+// - 8*16 ticks because we measure the time of the previous transfer
+#define DELAY_AIR2ARM_AS_READER (3 + 16 + 8 + 8*16 + 4*16 - 8*16)
// When the PM acts as a reader and is sending, it takes
// 4*16 ticks until we can write data to the sending hold register
// When the PM acts as a reader and is sending, it takes
// 4*16 ticks until we can write data to the sending hold register
// 8 ticks until the SSC samples the first data
// 7*16 ticks to complete the transfer from FPGA to ARM
// 8 ticks until the next ssp_clk rising edge
// 8 ticks until the SSC samples the first data
// 7*16 ticks to complete the transfer from FPGA to ARM
// 8 ticks until the next ssp_clk rising edge
-// 4*16 ticks until we measure the time
-// - 8*16 ticks because we measure the time of the previous transfer
+// 4*16 ticks until we measure the time
+// - 8*16 ticks because we measure the time of the previous transfer
// The FPGA will report its internal sending delay in
uint16_t FpgaSendQueueDelay;
// the 5 first bits are the number of bits buffered in mod_sig_buf
// The FPGA will report its internal sending delay in
uint16_t FpgaSendQueueDelay;
// the 5 first bits are the number of bits buffered in mod_sig_buf
// 8 ticks (on average) until the result is stored in to_arm
// + the delays in transferring data - which is the same for
// sniffing reader and tag data and therefore not relevant
// 8 ticks (on average) until the result is stored in to_arm
// + the delays in transferring data - which is the same for
// sniffing reader and tag data and therefore not relevant
// start bit, which marks the start of the communication)
// 3 ticks A/D conversion
// 8 ticks on average until the data is stored in to_arm.
// + the delays in transferring data - which is the same for
// sniffing reader and tag data and therefore not relevant
// start bit, which marks the start of the communication)
// 3 ticks A/D conversion
// 8 ticks on average until the data is stored in to_arm.
// + the delays in transferring data - which is the same for
// sniffing reader and tag data and therefore not relevant
// Sequence X: 00001100 drop after half a period
// Sequence Y: 00000000 no drop
// Sequence Z: 11000000 drop at start
// Sequence X: 00001100 drop after half a period
// Sequence Y: 00000000 no drop
// Sequence Z: 11000000 drop at start
// Generate the parity bits
parityBits |= ((oddparity8(pbtCmd[i])) << (7-paritybit_cnt));
if (paritybit_cnt == 7) {
// Generate the parity bits
parityBits |= ((oddparity8(pbtCmd[i])) << (7-paritybit_cnt));
if (paritybit_cnt == 7) {
- par[paritybyte_cnt] = parityBits; // save 8 Bits parity
- parityBits = 0; // and advance to next Parity Byte
+ par[paritybyte_cnt] = parityBits; // save 8 Bits parity
+ parityBits = 0; // and advance to next Parity Byte
//=============================================================================
// Basics:
// This decoder is used when the PM3 acts as a tag.
//=============================================================================
// Basics:
// This decoder is used when the PM3 acts as a tag.
-// The reader will generate "pauses" by temporarily switching of the field.
-// At the PM3 antenna we will therefore measure a modulated antenna voltage.
+// The reader will generate "pauses" by temporarily switching of the field.
+// At the PM3 antenna we will therefore measure a modulated antenna voltage.
// The FPGA does a comparison with a threshold and would deliver e.g.:
// ........ 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 .......
// The Miller decoder needs to identify the following sequences:
// The FPGA does a comparison with a threshold and would deliver e.g.:
// ........ 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 .......
// The Miller decoder needs to identify the following sequences:
-// 2 (or 3) ticks pause followed by 6 (or 5) ticks unmodulated: pause at beginning - Sequence Z ("start of communication" or a "0")
-// 8 ticks without a modulation: no pause - Sequence Y (a "0" or "end of communication" or "no information")
-// 4 ticks unmodulated followed by 2 (or 3) ticks pause: pause in second half - Sequence X (a "1")
+// 2 (or 3) ticks pause followed by 6 (or 5) ticks unmodulated: pause at beginning - Sequence Z ("start of communication" or a "0")
+// 8 ticks without a modulation: no pause - Sequence Y (a "0" or "end of communication" or "no information")
+// 4 ticks unmodulated followed by 2 (or 3) ticks pause: pause in second half - Sequence X (a "1")
// Note 1: the bitstream may start at any time. We therefore need to sync.
// Note 2: the interpretation of Sequence Y and Z depends on the preceding sequence.
//-----------------------------------------------------------------------------
// Note 1: the bitstream may start at any time. We therefore need to sync.
// Note 2: the interpretation of Sequence Y and Z depends on the preceding sequence.
//-----------------------------------------------------------------------------
#define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x000000F0) >> 4])
#define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x0000000F)])
#define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x000000F0) >> 4])
#define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x0000000F)])
- Uart.len = 0; // number of decoded data bytes
- Uart.parityLen = 0; // number of decoded parity bytes
- Uart.shiftReg = 0; // shiftreg to hold decoded data bits
- Uart.parityBits = 0; // holds 8 parity bits
- Uart.startTime = 0;
- Uart.endTime = 0;
+ Uart.len = 0; // number of decoded data bytes
+ Uart.parityLen = 0; // number of decoded parity bytes
+ Uart.shiftReg = 0; // shiftreg to hold decoded data bits
+ Uart.parityBits = 0; // holds 8 parity bits
// The start bit is one ore more Sequence Y followed by a Sequence Z (... 11111111 00x11111). We need to distinguish from
// Sequence X followed by Sequence Y followed by Sequence Z (111100x1 11111111 00x11111)
// The start bit is one ore more Sequence Y followed by a Sequence Z (... 11111111 00x11111). We need to distinguish from
// Sequence X followed by Sequence Y followed by Sequence Z (111100x1 11111111 00x11111)
- #define ISO14443A_STARTBIT_MASK 0x07FFEF80 // mask is 00000111 11111111 11101111 10000000
- #define ISO14443A_STARTBIT_PATTERN 0x07FF8F80 // pattern is 00000111 11111111 10001111 10000000
- if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 0)) == ISO14443A_STARTBIT_PATTERN >> 0) Uart.syncBit = 7;
+ #define ISO14443A_STARTBIT_MASK 0x07FFEF80 // mask is 00000111 11111111 11101111 10000000
+ #define ISO14443A_STARTBIT_PATTERN 0x07FF8F80 // pattern is 00000111 11111111 10001111 10000000
+ if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 0)) == ISO14443A_STARTBIT_PATTERN >> 0) Uart.syncBit = 7;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 1)) == ISO14443A_STARTBIT_PATTERN >> 1) Uart.syncBit = 6;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 2)) == ISO14443A_STARTBIT_PATTERN >> 2) Uart.syncBit = 5;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 3)) == ISO14443A_STARTBIT_PATTERN >> 3) Uart.syncBit = 4;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 1)) == ISO14443A_STARTBIT_PATTERN >> 1) Uart.syncBit = 6;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 2)) == ISO14443A_STARTBIT_PATTERN >> 2) Uart.syncBit = 5;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 3)) == ISO14443A_STARTBIT_PATTERN >> 3) Uart.syncBit = 4;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 6)) == ISO14443A_STARTBIT_PATTERN >> 6) Uart.syncBit = 1;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 7)) == ISO14443A_STARTBIT_PATTERN >> 7) Uart.syncBit = 0;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 6)) == ISO14443A_STARTBIT_PATTERN >> 6) Uart.syncBit = 1;
else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 7)) == ISO14443A_STARTBIT_PATTERN >> 7) Uart.syncBit = 0;
Uart.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8);
Uart.startTime -= Uart.syncBit;
Uart.endTime = Uart.startTime;
Uart.state = STATE_START_OF_COMMUNICATION;
Uart.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8);
Uart.startTime -= Uart.syncBit;
Uart.endTime = Uart.startTime;
Uart.state = STATE_START_OF_COMMUNICATION;
- if (IsMillerModulationNibble1(Uart.fourBits >> Uart.syncBit)) {
- if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) { // Modulation in both halves - error
+ if (IsMillerModulationNibble1(Uart.fourBits >> Uart.syncBit)) {
+ if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) { // Modulation in both halves - error
+ LED_B_OFF();
- } else { // Modulation in first half = Sequence Z = logic "0"
- if (Uart.state == STATE_MILLER_X) { // error - must not follow after X
+ } else { // Modulation in first half = Sequence Z = logic "0"
+ if (Uart.state == STATE_MILLER_X) { // error - must not follow after X
+ LED_B_OFF();
- Uart.parityBits <<= 1; // make room for the parity bit
- Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit
+ Uart.parityBits <<= 1; // make room for the parity bit
+ Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit
- if((Uart.len&0x0007) == 0) { // every 8 data bytes
- Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits
+ if((Uart.len&0x0007) == 0) { // every 8 data bytes
+ Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits
- Uart.parityBits <<= 1; // make room for the new parity bit
- Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit
+ Uart.parityBits <<= 1; // make room for the new parity bit
+ Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit
- if ((Uart.len&0x0007) == 0) { // every 8 data bytes
- Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits
+ if ((Uart.len&0x0007) == 0) { // every 8 data bytes
+ Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits
- } else { // no modulation in both halves - Sequence Y
- if (Uart.state == STATE_MILLER_Z || Uart.state == STATE_MILLER_Y) { // Y after logic "0" - End of Communication
+ } else { // no modulation in both halves - Sequence Y
+ if (Uart.state == STATE_MILLER_Z || Uart.state == STATE_MILLER_Y) { // Y after logic "0" - End of Communication
+ LED_B_OFF();
- Uart.bitCount--; // last "0" was part of EOC sequence
- Uart.shiftReg <<= 1; // drop it
- if(Uart.bitCount > 0) { // if we decoded some bits
- Uart.shiftReg >>= (9 - Uart.bitCount); // right align them
- Uart.output[Uart.len++] = (Uart.shiftReg & 0xff); // add last byte to the output
- Uart.parityBits <<= 1; // add a (void) parity bit
- Uart.parityBits <<= (8 - (Uart.len&0x0007)); // left align parity bits
- Uart.parity[Uart.parityLen++] = Uart.parityBits; // and store it
+ Uart.bitCount--; // last "0" was part of EOC sequence
+ Uart.shiftReg <<= 1; // drop it
+ if(Uart.bitCount > 0) { // if we decoded some bits
+ Uart.shiftReg >>= (9 - Uart.bitCount); // right align them
+ Uart.output[Uart.len++] = (Uart.shiftReg & 0xff); // add last byte to the output
+ Uart.parityBits <<= 1; // add a (void) parity bit
+ Uart.parityBits <<= (8 - (Uart.len&0x0007)); // left align parity bits
+ Uart.parity[Uart.parityLen++] = Uart.parityBits; // and store it
- } else if (Uart.len & 0x0007) { // there are some parity bits to store
- Uart.parityBits <<= (8 - (Uart.len&0x0007)); // left align remaining parity bits
- Uart.parity[Uart.parityLen++] = Uart.parityBits; // and store them
+ } else if (Uart.len & 0x0007) { // there are some parity bits to store
+ Uart.parityBits <<= (8 - (Uart.len&0x0007)); // left align remaining parity bits
+ Uart.parity[Uart.parityLen++] = Uart.parityBits; // and store them
- Uart.parityBits <<= 1; // make room for the parity bit
- Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit
+ Uart.parityBits <<= 1; // make room for the parity bit
+ Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit
- if ((Uart.len&0x0007) == 0) { // every 8 data bytes
- Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits
+ if ((Uart.len&0x0007) == 0) { // every 8 data bytes
+ Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits
// at the reader antenna will be modulated as well. The FPGA detects the modulation for us and would deliver e.g. the following:
// ........ 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .......
// The Manchester decoder needs to identify the following sequences:
// at the reader antenna will be modulated as well. The FPGA detects the modulation for us and would deliver e.g. the following:
// ........ 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .......
// The Manchester decoder needs to identify the following sequences:
-// 4 ticks modulated followed by 4 ticks unmodulated: Sequence D = 1 (also used as "start of communication")
-// 4 ticks unmodulated followed by 4 ticks modulated: Sequence E = 0
-// 8 ticks unmodulated: Sequence F = end of communication
-// 8 ticks modulated: A collision. Save the collision position and treat as Sequence D
+// 4 ticks modulated followed by 4 ticks unmodulated: Sequence D = 1 (also used as "start of communication")
+// 4 ticks unmodulated followed by 4 ticks modulated: Sequence E = 0
+// 8 ticks unmodulated: Sequence F = end of communication
+// 8 ticks modulated: A collision. Save the collision position and treat as Sequence D
// Note 1: the bitstream may start at any time. We therefore need to sync.
// Note 2: parameter offset is used to determine the position of the parity bits (required for the anticollision command only)
static tDemod Demod;
// Note 1: the bitstream may start at any time. We therefore need to sync.
// Note 2: parameter offset is used to determine the position of the parity bits (required for the anticollision command only)
static tDemod Demod;
- Demod.shiftReg = 0; // shiftreg to hold decoded data bits
- Demod.parityBits = 0; //
- Demod.collisionPos = 0; // Position of collision bit
- Demod.twoBits = 0xffff; // buffer for 2 Bits
+ Demod.shiftReg = 0; // shiftreg to hold decoded data bits
+ Demod.parityBits = 0; //
+ Demod.collisionPos = 0; // Position of collision bit
+ Demod.twoBits = 0xffff; // buffer for 2 Bits
else if ((Demod.twoBits & 0x3B80) == 0x3800) Demod.syncBit = 6;
else if ((Demod.twoBits & 0x1DC0) == 0x1C00) Demod.syncBit = 5;
else if ((Demod.twoBits & 0x0EE0) == 0x0E00) Demod.syncBit = 4;
else if ((Demod.twoBits & 0x3B80) == 0x3800) Demod.syncBit = 6;
else if ((Demod.twoBits & 0x1DC0) == 0x1C00) Demod.syncBit = 5;
else if ((Demod.twoBits & 0x0EE0) == 0x0E00) Demod.syncBit = 4;
if (Demod.syncBit != 0xFFFF) {
Demod.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8);
Demod.startTime -= Demod.syncBit;
if (Demod.syncBit != 0xFFFF) {
Demod.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8);
Demod.startTime -= Demod.syncBit;
- if (IsManchesterModulationNibble1(Demod.twoBits >> Demod.syncBit)) { // modulation in first half
- if (IsManchesterModulationNibble2(Demod.twoBits >> Demod.syncBit)) { // ... and in second half = collision
+ if (IsManchesterModulationNibble1(Demod.twoBits >> Demod.syncBit)) { // modulation in first half
+ if (IsManchesterModulationNibble2(Demod.twoBits >> Demod.syncBit)) { // ... and in second half = collision
- Demod.shiftReg = (Demod.shiftReg >> 1) | 0x100; // in both cases, add a 1 to the shiftreg
- if(Demod.bitCount == 9) { // if we decoded a full byte (including parity)
+ Demod.shiftReg = (Demod.shiftReg >> 1) | 0x100; // in both cases, add a 1 to the shiftreg
+ if(Demod.bitCount == 9) { // if we decoded a full byte (including parity)
- Demod.parityBits <<= 1; // make room for the parity bit
- Demod.parityBits |= ((Demod.shiftReg >> 8) & 0x01); // store parity bit
+ Demod.parityBits <<= 1; // make room for the parity bit
+ Demod.parityBits |= ((Demod.shiftReg >> 8) & 0x01); // store parity bit
- if((Demod.len&0x0007) == 0) { // every 8 data bytes
- Demod.parity[Demod.parityLen++] = Demod.parityBits; // store 8 parity bits
+ if((Demod.len&0x0007) == 0) { // every 8 data bytes
+ Demod.parity[Demod.parityLen++] = Demod.parityBits; // store 8 parity bits
- } else { // no modulation in first half
- if (IsManchesterModulationNibble2(Demod.twoBits >> Demod.syncBit)) { // and modulation in second half = Sequence E = 0
+ } else { // no modulation in first half
+ if (IsManchesterModulationNibble2(Demod.twoBits >> Demod.syncBit)) { // and modulation in second half = Sequence E = 0
- Demod.shiftReg = (Demod.shiftReg >> 1); // add a 0 to the shiftreg
- if(Demod.bitCount >= 9) { // if we decoded a full byte (including parity)
+ Demod.shiftReg = (Demod.shiftReg >> 1); // add a 0 to the shiftreg
+ if(Demod.bitCount >= 9) { // if we decoded a full byte (including parity)
- if ((Demod.len&0x0007) == 0) { // every 8 data bytes
- Demod.parity[Demod.parityLen++] = Demod.parityBits; // store 8 parity bits1
+ if ((Demod.len&0x0007) == 0) { // every 8 data bytes
+ Demod.parity[Demod.parityLen++] = Demod.parityBits; // store 8 parity bits1
- } else { // no modulation in both halves - End of communication
- if(Demod.bitCount > 0) { // there are some remaining data bits
- Demod.shiftReg >>= (9 - Demod.bitCount); // right align the decoded bits
- Demod.output[Demod.len++] = Demod.shiftReg & 0xff; // and add them to the output
- Demod.parityBits <<= 1; // add a (void) parity bit
- Demod.parityBits <<= (8 - (Demod.len&0x0007)); // left align remaining parity bits
- Demod.parity[Demod.parityLen++] = Demod.parityBits; // and store them
+ } else { // no modulation in both halves - End of communication
+ LED_C_OFF();
+ if(Demod.bitCount > 0) { // there are some remaining data bits
+ Demod.shiftReg >>= (9 - Demod.bitCount); // right align the decoded bits
+ Demod.output[Demod.len++] = Demod.shiftReg & 0xff; // and add them to the output
+ Demod.parityBits <<= 1; // add a (void) parity bit
+ Demod.parityBits <<= (8 - (Demod.len&0x0007)); // left align remaining parity bits
+ Demod.parity[Demod.parityLen++] = Demod.parityBits; // and store them
- } else if (Demod.len & 0x0007) { // there are some parity bits to store
- Demod.parityBits <<= (8 - (Demod.len&0x0007)); // left align remaining parity bits
- Demod.parity[Demod.parityLen++] = Demod.parityBits; // and store them
+ } else if (Demod.len & 0x0007) { // there are some parity bits to store
+ Demod.parityBits <<= (8 - (Demod.len&0x0007)); // left align remaining parity bits
+ Demod.parity[Demod.parityLen++] = Demod.parityBits; // and store them
- return true; // we are finished with decoding the raw data sequence
- } else { // nothing received. Start over
+ return true; // we are finished with decoding the raw data sequence
+ } else { // nothing received. Start over
// The command (reader -> tag) that we're receiving.
uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE);
// The command (reader -> tag) that we're receiving.
uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE);
// The response (tag -> reader) that we're receiving.
uint8_t *receivedResponse = BigBuf_malloc(MAX_FRAME_SIZE);
uint8_t *receivedResponsePar = BigBuf_malloc(MAX_PARITY_SIZE);
// The response (tag -> reader) that we're receiving.
uint8_t *receivedResponse = BigBuf_malloc(MAX_FRAME_SIZE);
uint8_t *receivedResponsePar = BigBuf_malloc(MAX_PARITY_SIZE);
// The DMA buffer, used to stream samples from the FPGA
uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
// The DMA buffer, used to stream samples from the FPGA
uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
// Set up the demodulator for tag -> reader responses.
DemodInit(receivedResponse, receivedResponsePar);
// Set up the demodulator for tag -> reader responses.
DemodInit(receivedResponse, receivedResponsePar);
// Set up the demodulator for the reader -> tag commands
UartInit(receivedCmd, receivedCmdPar);
// Set up the demodulator for the reader -> tag commands
UartInit(receivedCmd, receivedCmdPar);
// We won't start recording the frames that we acquire until we trigger;
// a good trigger condition to get started is probably when we see a
// response from the tag.
// triggered == false -- to wait first for card
// We won't start recording the frames that we acquire until we trigger;
// a good trigger condition to get started is probably when we see a
// response from the tag.
// triggered == false -- to wait first for card
uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
if (MillerDecoding(readerdata, (rsamples-1)*4)) {
uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
if (MillerDecoding(readerdata, (rsamples-1)*4)) {
Uart.startTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER,
Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER,
Uart.startTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER,
Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER,
/* And also reset the demod code, which might have been */
/* false-triggered by the commands from the reader. */
DemodReset();
/* And also reset the demod code, which might have been */
/* false-triggered by the commands from the reader. */
DemodReset();
- if(ManchesterDecoding(tagdata, 0, (rsamples-1)*4)) {
- LED_B_ON();
-
- if (!LogTrace(receivedResponse,
- Demod.len,
- Demod.startTime*16 - DELAY_TAG_AIR2ARM_AS_SNIFFER,
+ if (ManchesterDecoding(tagdata, 0, (rsamples-1)*4)) {
+ if (!LogTrace(receivedResponse,
+ Demod.len,
+ Demod.startTime*16 - DELAY_TAG_AIR2ARM_AS_SNIFFER,
// And ready to receive another response.
DemodReset();
// And reset the Miller decoder including itS (now outdated) input buffer
UartInit(receivedCmd, receivedCmdPar);
// And ready to receive another response.
DemodReset();
// And reset the Miller decoder including itS (now outdated) input buffer
UartInit(receivedCmd, receivedCmdPar);
Dbprintf("maxDataLen=%d, Uart.state=%x, Uart.len=%d", maxDataLen, Uart.state, Uart.len);
Dbprintf("traceLen=%d, Uart.output[0]=%08x", BigBuf_get_traceLen(), (uint32_t)Uart.output[0]);
Dbprintf("maxDataLen=%d, Uart.state=%x, Uart.len=%d", maxDataLen, Uart.state, Uart.len);
Dbprintf("traceLen=%d, Uart.output[0]=%08x", BigBuf_get_traceLen(), (uint32_t)Uart.output[0]);
}
//-----------------------------------------------------------------------------
// Prepare tag messages
//-----------------------------------------------------------------------------
}
//-----------------------------------------------------------------------------
// Prepare tag messages
//-----------------------------------------------------------------------------
static void EmLogTraceTag(uint8_t *tag_data, uint16_t tag_len, uint8_t *tag_Parity, uint32_t ProxToAirDuration) {
uint32_t tag_StartTime = LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG;
uint32_t tag_EndTime = (LastTimeProxToAirStart + ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG;
static void EmLogTraceTag(uint8_t *tag_data, uint16_t tag_len, uint8_t *tag_Parity, uint32_t ProxToAirDuration) {
uint32_t tag_StartTime = LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG;
uint32_t tag_EndTime = (LastTimeProxToAirStart + ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG;
// Stop when button is pressed
// Or return true when command is captured
//-----------------------------------------------------------------------------
// Stop when button is pressed
// Or return true when command is captured
//-----------------------------------------------------------------------------
-static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int *len)
-{
- // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
- // only, since we are receiving, not transmitting).
- // Signal field is off with the appropriate LED
- LED_D_OFF();
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int *len) {
+ // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
+ // only, since we are receiving, not transmitting).
+ // Signal field is off with the appropriate LED
+ LED_D_OFF();
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
- if(BUTTON_PRESS()) return false;
-
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
int EmSend4bit(uint8_t resp);
static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, uint8_t *par);
int EmSend4bit(uint8_t resp);
static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, uint8_t *par);
// Prepare the tag modulation bits from the message
GetParity(response_info->response, response_info->response_n, &(response_info->par));
CodeIso14443aAsTagPar(response_info->response,response_info->response_n, &(response_info->par));
// Prepare the tag modulation bits from the message
GetParity(response_info->response, response_info->response_n, &(response_info->par));
CodeIso14443aAsTagPar(response_info->response,response_info->response_n, &(response_info->par));
- Dbprintf("Out of memory, when modulating bits for tag answer:");
- Dbhexdump(response_info->response_n, response_info->response, false);
- return false;
+ Dbprintf("Out of memory, when modulating bits for tag answer:");
+ Dbhexdump(response_info->response_n, response_info->response, false);
+ return false;
// Copy the byte array, used for this modulation to the buffer position
memcpy(response_info->modulation, ToSend, ToSendMax);
// Copy the byte array, used for this modulation to the buffer position
memcpy(response_info->modulation, ToSend, ToSendMax);
// Store the number of bytes that were used for encoding/modulation and the time needed to transfer them
response_info->modulation_n = ToSendMax;
response_info->ProxToAirDuration = LastProxToAirDuration;
// Store the number of bytes that were used for encoding/modulation and the time needed to transfer them
response_info->modulation_n = ToSendMax;
response_info->ProxToAirDuration = LastProxToAirDuration;
-// Coded responses need one byte per bit to transfer (data, parity, start, stop, correction)
+// Coded responses need one byte per bit to transfer (data, parity, start, stop, correction)
// 28 * 8 data bits, 28 * 1 parity bits, 7 start bits, 7 stop bits, 7 correction bits for the modulation
// -> need 273 bytes buffer
#define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 273
// 28 * 8 data bits, 28 * 1 parity bits, 7 start bits, 7 stop bits, 7 correction bits for the modulation
// -> need 273 bytes buffer
#define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 273
// Forward the prepare tag modulation function to the inner function
if (prepare_tag_modulation(response_info, *max_buffer_size)) {
// Forward the prepare tag modulation function to the inner function
if (prepare_tag_modulation(response_info, *max_buffer_size)) {
// Main loop of simulated tag: receive commands from reader, decide what
// response to send, and send it.
//-----------------------------------------------------------------------------
// Main loop of simulated tag: receive commands from reader, decide what
// response to send, and send it.
//-----------------------------------------------------------------------------
-void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
-{
+void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, uint8_t* data) {
+
// The second response contains the (mandatory) first 24 bits of the UID
uint8_t response2[5] = {0x00};
// Check if the uid uses the (optional) part
uint8_t response2a[5] = {0x00};
// The second response contains the (mandatory) first 24 bits of the UID
uint8_t response2[5] = {0x00};
// Check if the uid uses the (optional) part
uint8_t response2a[5] = {0x00};
ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce
ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce
- uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS:
- // Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present,
+ uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS:
+ // Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present,
// TA(1) = 0x80: different divisors not supported, DR = 1, DS = 1
// TB(1) = not present. Defaults: FWI = 4 (FWT = 256 * 16 * 2^4 * 1/fc = 4833us), SFGI = 0 (SFG = 256 * 16 * 2^0 * 1/fc = 302us)
// TC(1) = 0x02: CID supported, NAD not supported
// TA(1) = 0x80: different divisors not supported, DR = 1, DS = 1
// TB(1) = not present. Defaults: FWI = 4 (FWT = 256 * 16 * 2^4 * 1/fc = 4833us), SFGI = 0 (SFG = 256 * 16 * 2^0 * 1/fc = 302us)
// TC(1) = 0x02: CID supported, NAD not supported
// We need to listen to the high-frequency, peak-detected path.
iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
// We need to listen to the high-frequency, peak-detected path.
iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
// Clean receive command buffer
if(!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)) {
DbpString("Button press");
// Clean receive command buffer
if(!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)) {
DbpString("Button press");
// Okay, look at the command now.
lastorder = order;
if(receivedCmd[0] == 0x26) { // Received a REQUEST
p_response = &responses[0]; order = 1;
} else if(receivedCmd[0] == 0x52) { // Received a WAKEUP
p_response = &responses[0]; order = 6;
// Okay, look at the command now.
lastorder = order;
if(receivedCmd[0] == 0x26) { // Received a REQUEST
p_response = &responses[0]; order = 1;
} else if(receivedCmd[0] == 0x52) { // Received a WAKEUP
p_response = &responses[0]; order = 6;
- } else if(receivedCmd[0] == 0x30) { // Received a (plain) READ
- EmSendCmdEx(data+(4*receivedCmd[1]),16);
+ } else if(receivedCmd[0] == 0x30) { // Received a (plain) READ
+ EmSendCmd(data+(4*receivedCmd[1]),16);
// Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]);
// We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
p_response = NULL;
// Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]);
// We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
p_response = NULL;
- } else if(receivedCmd[0] == 0xE0) { // Received a RATS request
- if (tagType == 1 || tagType == 2) { // RATS not supported
+ } else if(receivedCmd[0] == 0xE0) { // Received a RATS request
+ if (tagType == 1 || tagType == 2) { // RATS not supported
case 0xBA: { //
memcpy(dynamic_response_info.response,"\xAB\x00",2);
dynamic_response_info.response_n = 2;
case 0xBA: { //
memcpy(dynamic_response_info.response,"\xAB\x00",2);
dynamic_response_info.response_n = 2;
if (dynamic_response_info.response_n > 0) {
// Copy the CID from the reader query
dynamic_response_info.response[1] = receivedCmd[1];
if (dynamic_response_info.response_n > 0) {
// Copy the CID from the reader query
dynamic_response_info.response[1] = receivedCmd[1];
// Add CRC bytes, always used in ISO 14443A-4 compliant cards
AppendCrc14443a(dynamic_response_info.response,dynamic_response_info.response_n);
dynamic_response_info.response_n += 2;
// Add CRC bytes, always used in ISO 14443A-4 compliant cards
AppendCrc14443a(dynamic_response_info.response,dynamic_response_info.response_n);
dynamic_response_info.response_n += 2;
if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) {
Dbprintf("Error preparing tag response");
break;
if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) {
Dbprintf("Error preparing tag response");
break;
// prepare a delayed transfer. This simply shifts ToSend[] by a number
// of bits specified in the delay parameter.
// prepare a delayed transfer. This simply shifts ToSend[] by a number
// of bits specified in the delay parameter.
// Transmit the command (to the tag) that was placed in ToSend[].
// Parameter timing:
// if NULL: transfer at next possible time, taking into account
// Transmit the command (to the tag) that was placed in ToSend[].
// Parameter timing:
// if NULL: transfer at next possible time, taking into account
-// request guard time, startup frame guard time and frame delay time
-// if == 0: transfer immediately and return time of transfer
+// request guard time, startup frame guard time and frame delay time
+// if == 0: transfer immediately and return time of transfer
// if != 0: delay transfer until time specified
//-------------------------------------------------------------------------------------
// if != 0: delay transfer until time specified
//-------------------------------------------------------------------------------------
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
uint32_t ThisTransferTime = 0;
if (timing) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
uint32_t ThisTransferTime = 0;
if (timing) {
- if(MF_DBGLEVEL >= 4 && GetCountSspClk() >= (*timing & 0xfffffff8)) Dbprintf("TransmitFor14443a: Missed timing");
- while(GetCountSspClk() < (*timing & 0xfffffff8)); // Delay transfer (multiple of 8 MF clock ticks)
+ if (MF_DBGLEVEL >= 4 && GetCountSspClk() >= (*timing & 0xfffffff8)) Dbprintf("TransmitFor14443a: Missed timing");
+ while (GetCountSspClk() < (*timing & 0xfffffff8)); // Delay transfer (multiple of 8 MF clock ticks)
LastTimeProxToAirStart = *timing;
} else {
ThisTransferTime = ((MAX(NextTransferTime, GetCountSspClk()) & 0xfffffff8) + 8);
LastTimeProxToAirStart = *timing;
} else {
ThisTransferTime = ((MAX(NextTransferTime, GetCountSspClk()) & 0xfffffff8) + 8);
}
//-----------------------------------------------------------------------------
// Prepare reader command (in bits, support short frames) to send to FPGA
//-----------------------------------------------------------------------------
}
//-----------------------------------------------------------------------------
// Prepare reader command (in bits, support short frames) to send to FPGA
//-----------------------------------------------------------------------------
-static void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity)
-{
+static void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity) {
// Stop when button is pressed (return 1) or field was gone (return 2)
// Or return 0 when command is captured
//-----------------------------------------------------------------------------
// Stop when button is pressed (return 1) or field was gone (return 2)
// Or return 0 when command is captured
//-----------------------------------------------------------------------------
-int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)
-{
+int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) {
+ uint32_t field_off_time = -1;
+ uint32_t samples = 0;
+ int ret = 0;
+ uint8_t b = 0;;
+ uint8_t dmaBuf[DMA_BUFFER_SIZE];
+ uint8_t *upTo = dmaBuf;
+
- // Set ADC to read field strength
- AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST;
- AT91C_BASE_ADC->ADC_MR =
- ADC_MODE_PRESCALE(63) |
- ADC_MODE_STARTUP_TIME(1) |
- ADC_MODE_SAMPLE_HOLD_TIME(15);
- AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ADC_CHAN_HF);
- do {
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
- AT91C_BASE_SSC->SSC_THR = SEC_F;
- uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; (void) b;
- }
- } while (GetCountSspClk() < LastTimeProxToAirStart + LastProxToAirDuration + (FpgaSendQueueDelay>>3));
+ while (GetCountSspClk() < LastTimeProxToAirStart + LastProxToAirDuration + (FpgaSendQueueDelay>>3) - 8 - 3) /* wait */ ;
// Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
// only, since we are receiving, not transmitting).
// Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
// only, since we are receiving, not transmitting).
+ // clear receive register, measure time of next transfer
+ uint32_t temp = AT91C_BASE_SSC->SSC_RHR; (void) temp;
+ while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)) ;
+ uint32_t start_time = GetCountSspClk() & 0xfffffff8;
+
+ // Setup and start DMA.
+ FpgaSetupSscDma(dmaBuf, DMA_BUFFER_SIZE);
+
- if (BUTTON_PRESS()) return 1;
-
- // test if the field exists
- if (AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ADC_CHAN_HF)) {
- analogCnt++;
- analogAVG += AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF];
- AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;
- if (analogCnt >= 32) {
- if ((MAX_ADC_HF_VOLTAGE * (analogAVG / analogCnt) >> 10) < MF_MINFIELDV) {
- vtime = GetTickCount();
- if (!timer) timer = vtime;
- // 50ms no field --> card to idle state
- if (vtime - timer > 50) return 2;
- } else
- if (timer) timer = 0;
- analogCnt = 0;
- analogAVG = 0;
+ b = *upTo++;
+
+ if(upTo >= dmaBuf + 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*DMA_BUFFER_SIZE/10)) {
+ Dbprintf("About to blow circular buffer - aborted! behindBy=%d", behindBy);
+ ret = 1;
+ break;
- // receive and test the miller decoding
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
- if(MillerDecoding(b, 0)) {
- *len = Uart.len;
- EmLogTraceReader();
- return 0;
+ if (BUTTON_PRESS()) {
+ ret = 1;
+ break;
+ }
+
+ // check reader's HF field
+ if (AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ADC_CHAN_HF_LOW)) {
+ if ((MAX_ADC_HF_VOLTAGE_LOW * AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF_LOW]) >> 10 < MF_MINFIELDV) {
+ if (GetTickCount() - field_off_time > 50) {
+ ret = 2; // reader has switched off HF field for more than 50ms. Timeout
+ break;
+ }
+ } else {
+ field_off_time = GetTickCount(); // HF field is still there. Reset timer
- for (uint16_t j = 0; j < 5; j++) { // allow timeout - better late than never
- while(!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY));
+ for (uint16_t j = 0; j < 5; j++) { // allow timeout - better late than never
+ while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY));
if (AT91C_BASE_SSC->SSC_RHR) break;
}
LastTimeProxToAirStart = (GetCountSspClk() & 0xfffffff8) + (correctionNeeded?8:0);
// send cycle
if (AT91C_BASE_SSC->SSC_RHR) break;
}
LastTimeProxToAirStart = (GetCountSspClk() & 0xfffffff8) + (correctionNeeded?8:0);
// send cycle
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
AT91C_BASE_SSC->SSC_THR = resp[i++];
FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
AT91C_BASE_SSC->SSC_THR = resp[i++];
FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
}
Code4bitAnswerAsTag(resp);
int res = EmSendCmd14443aRaw(ToSend, ToSendMax);
Code4bitAnswerAsTag(resp);
int res = EmSendCmd14443aRaw(ToSend, ToSendMax);
EmLogTraceTag(&resp, 1, NULL, LastProxToAirDuration);
return res;
}
EmLogTraceTag(&resp, 1, NULL, LastProxToAirDuration);
return res;
}
static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, uint8_t *par){
CodeIso14443aAsTagPar(resp, respLen, par);
int res = EmSendCmd14443aRaw(ToSend, ToSendMax);
static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, uint8_t *par){
CodeIso14443aAsTagPar(resp, respLen, par);
int res = EmSendCmd14443aRaw(ToSend, ToSendMax);
EmLogTraceTag(resp, respLen, par, LastProxToAirDuration);
return res;
}
EmLogTraceTag(resp, respLen, par, LastProxToAirDuration);
return res;
}
-int EmSendCmdEx(uint8_t *resp, uint16_t respLen){
- uint8_t par[MAX_PARITY_SIZE];
- GetParity(resp, respLen, par);
- return EmSendCmdExPar(resp, respLen, par);
-}
-
-
int EmSendCmd(uint8_t *resp, uint16_t respLen){
uint8_t par[MAX_PARITY_SIZE];
GetParity(resp, respLen, par);
int EmSendCmd(uint8_t *resp, uint16_t respLen){
uint8_t par[MAX_PARITY_SIZE];
GetParity(resp, respLen, par);
int EmSendPrecompiledCmd(tag_response_info_t *response_info) {
int ret = EmSendCmd14443aRaw(response_info->modulation, response_info->modulation_n);
int EmSendPrecompiledCmd(tag_response_info_t *response_info) {
int ret = EmSendCmd14443aRaw(response_info->modulation, response_info->modulation_n);
EmLogTraceTag(response_info->response, response_info->response_n, &(response_info->par), response_info->ProxToAirDuration);
return ret;
}
EmLogTraceTag(response_info->response, response_info->response_n, &(response_info->par), response_info->ProxToAirDuration);
return ret;
}
// If a response is captured return true
// If it takes too long return false
//-----------------------------------------------------------------------------
// If a response is captured return true
// If it takes too long return false
//-----------------------------------------------------------------------------
-static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset)
-{
+static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset) {
// Set FPGA mode to "reader listen mode", no modulation (listen
// only, since we are receiving, not transmitting).
// Signal field is on with the appropriate LED
LED_D_ON();
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN);
// Set FPGA mode to "reader listen mode", no modulation (listen
// only, since we are receiving, not transmitting).
// Signal field is on with the appropriate LED
LED_D_ON();
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN);
// Now get the answer from the card
DemodInit(receivedResponse, receivedResponsePar);
// clear RXRDY:
// Now get the answer from the card
DemodInit(receivedResponse, receivedResponsePar);
// clear RXRDY:
NextTransferTime = MAX(NextTransferTime, Demod.endTime - (DELAY_AIR2ARM_AS_READER + DELAY_ARM2AIR_AS_READER)/16 + FRAME_DELAY_TIME_PICC_TO_PCD);
return true;
} else if (c++ > iso14a_timeout && Demod.state == DEMOD_UNSYNCD) {
NextTransferTime = MAX(NextTransferTime, Demod.endTime - (DELAY_AIR2ARM_AS_READER + DELAY_ARM2AIR_AS_READER)/16 + FRAME_DELAY_TIME_PICC_TO_PCD);
return true;
} else if (c++ > iso14a_timeout && Demod.state == DEMOD_UNSYNCD) {
-void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing)
-{
+void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing) {
+
- if (tracing) {
- LogTrace(frame, nbytes(bits), LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_READER, (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_READER, par, true);
- }
+ LogTrace(frame, nbytes(bits), LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_READER, (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_READER, par, true);
-void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *timing)
-{
- ReaderTransmitBitsPar(frame, len*8, par, timing);
+void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *timing) {
+ ReaderTransmitBitsPar(frame, len*8, par, timing);
// Generate parity and redirect
uint8_t par[MAX_PARITY_SIZE];
GetParity(frame, len/8, par);
// Generate parity and redirect
uint8_t par[MAX_PARITY_SIZE];
GetParity(frame, len/8, par);
// Generate parity and redirect
uint8_t par[MAX_PARITY_SIZE];
GetParity(frame, len, par);
// Generate parity and redirect
uint8_t par[MAX_PARITY_SIZE];
GetParity(frame, len, par);
- if (tracing) {
- LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, false);
- }
+ LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, false);
- if (tracing) {
- LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, false);
- }
+
+ LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, false);
-
- if (ats[0] > 1) { // there is a format byte T0
- if ((ats[1] & 0x20) == 0x20) { // there is an interface byte TB(1)
- if ((ats[1] & 0x10) == 0x10) { // there is an interface byte TA(1) preceding TB(1)
+
+ if (ats[0] > 1) { // there is a format byte T0
+ if ((ats[1] & 0x20) == 0x20) { // there is an interface byte TB(1)
+ if ((ats[1] & 0x10) == 0x10) { // there is an interface byte TA(1) preceding TB(1)
-#define WUPA_RETRY_TIMEOUT 10 // 10ms
- uint8_t wupa[] = { 0x52 }; // 0x26 - REQA 0x52 - WAKE-UP
+#define WUPA_RETRY_TIMEOUT 10 // 10ms
+ uint8_t wupa[] = {ISO14443A_CMD_WUPA}; // 0x26 - REQA 0x52 - WAKE-UP
// we may need several tries if we did send an unknown command or a wrong authentication before...
do {
// Broadcast for a card, WUPA (0x52) will force response from all cards in the field
// we may need several tries if we did send an unknown command or a wrong authentication before...
do {
// Broadcast for a card, WUPA (0x52) will force response from all cards in the field
// Receive the ATQA
len = ReaderReceive(resp, resp_par);
} while (len == 0 && GetTickCount() <= start_time + WUPA_RETRY_TIMEOUT);
// Receive the ATQA
len = ReaderReceive(resp, resp_par);
} while (len == 0 && GetTickCount() <= start_time + WUPA_RETRY_TIMEOUT);
// performs iso14443a anticollision (optional) and card select procedure
// fills the uid and cuid pointer unless NULL
// fills the card info record unless NULL
// performs iso14443a anticollision (optional) and card select procedure
// fills the uid and cuid pointer unless NULL
// fills the card info record unless NULL
// and num_cascades must be set (1: 4 Byte UID, 2: 7 Byte UID, 3: 10 Byte UID)
// requests ATS unless no_rats is true
// and num_cascades must be set (1: 4 Byte UID, 2: 7 Byte UID, 3: 10 Byte UID)
// requests ATS unless no_rats is true
-int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades, bool no_rats) {
+int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades, bool no_rats) {
uint8_t sel_all[] = { 0x93,0x20 };
uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t rats[] = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
uint8_t resp[MAX_FRAME_SIZE]; // theoretically. A usual RATS will be much smaller
uint8_t resp_par[MAX_PARITY_SIZE];
uint8_t sel_all[] = { 0x93,0x20 };
uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t rats[] = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
uint8_t resp[MAX_FRAME_SIZE]; // theoretically. A usual RATS will be much smaller
uint8_t resp_par[MAX_PARITY_SIZE];
p_hi14a_card->uidlen = 0;
memset(p_hi14a_card->uid, 0, 10);
p_hi14a_card->ats_len = 0;
p_hi14a_card->uidlen = 0;
memset(p_hi14a_card->uid, 0, 10);
p_hi14a_card->ats_len = 0;
// OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in
// which case we need to make a cascade 2 request and select - this is a long UID
// OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in
// which case we need to make a cascade 2 request and select - this is a long UID
- // While the UID is not complete, the 3nd bit (from the right) is set in the SAK.
- for(; sak & 0x04; cascade_level++) {
+ // While the UID is not complete, the 3rd bit (from the right) is set in the SAK.
+ for (; sak & 0x04; cascade_level++) {
// SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97)
sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2;
if (anticollision) {
// SELECT_ALL
ReaderTransmit(sel_all, sizeof(sel_all), NULL);
// SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97)
sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2;
if (anticollision) {
// SELECT_ALL
ReaderTransmit(sel_all, sizeof(sel_all), NULL);
memset(uid_resp, 0, 4);
uint16_t uid_resp_bits = 0;
uint16_t collision_answer_offset = 0;
// anti-collision-loop:
while (Demod.collisionPos) {
Dbprintf("Multiple tags detected. Collision after Bit %d", Demod.collisionPos);
memset(uid_resp, 0, 4);
uint16_t uid_resp_bits = 0;
uint16_t collision_answer_offset = 0;
// anti-collision-loop:
while (Demod.collisionPos) {
Dbprintf("Multiple tags detected. Collision after Bit %d", Demod.collisionPos);
uint16_t UIDbit = (resp[i/8] >> (i % 8)) & 0x01;
uid_resp[uid_resp_bits / 8] |= UIDbit << (uid_resp_bits % 8);
}
uint16_t UIDbit = (resp[i/8] >> (i % 8)) & 0x01;
uid_resp[uid_resp_bits / 8] |= UIDbit << (uid_resp_bits % 8);
}
for (uint16_t i = 0; i <= uid_resp_bits/8; i++) {
sel_uid[2+i] = uid_resp[i];
}
collision_answer_offset = uid_resp_bits%8;
ReaderTransmitBits(sel_uid, 16 + uid_resp_bits, NULL);
for (uint16_t i = 0; i <= uid_resp_bits/8; i++) {
sel_uid[2+i] = uid_resp[i];
}
collision_answer_offset = uid_resp_bits%8;
ReaderTransmitBits(sel_uid, 16 + uid_resp_bits, NULL);
}
// finally, add the last bits and BCC of the UID
for (uint16_t i = collision_answer_offset; i < (Demod.len-1)*8; i++, uid_resp_bits++) {
}
// finally, add the last bits and BCC of the UID
for (uint16_t i = collision_answer_offset; i < (Demod.len-1)*8; i++, uid_resp_bits++) {
- sel_uid[1] = 0x70; // transmitting a full UID (1 Byte cmd, 1 Byte NVB, 4 Byte UID, 1 Byte BCC, 2 Bytes CRC)
- memcpy(sel_uid+2, uid_resp, 4); // the UID received during anticollision, or the provided UID
- sel_uid[6] = sel_uid[2] ^ sel_uid[3] ^ sel_uid[4] ^ sel_uid[5]; // calculate and add BCC
- AppendCrc14443a(sel_uid, 7); // calculate and add CRC
+ sel_uid[1] = 0x70; // transmitting a full UID (1 Byte cmd, 1 Byte NVB, 4 Byte UID, 1 Byte BCC, 2 Bytes CRC)
+ memcpy(sel_uid+2, uid_resp, 4); // the UID received during anticollision, or the provided UID
+ sel_uid[6] = sel_uid[2] ^ sel_uid[3] ^ sel_uid[4] ^ sel_uid[5]; // calculate and add BCC
+ AppendCrc14443a(sel_uid, 7); // calculate and add CRC
// Test if more parts of the uid are coming
if ((sak & 0x04) /* && uid_resp[0] == 0x88 */) {
// Remove first byte, 0x88 is not an UID byte, it CT, see page 3 of:
// http://www.nxp.com/documents/application_note/AN10927.pdf
uid_resp[0] = uid_resp[1];
uid_resp[1] = uid_resp[2];
// Test if more parts of the uid are coming
if ((sak & 0x04) /* && uid_resp[0] == 0x88 */) {
// Remove first byte, 0x88 is not an UID byte, it CT, see page 3 of:
// http://www.nxp.com/documents/application_note/AN10927.pdf
uid_resp[0] = uid_resp[1];
uid_resp[1] = uid_resp[2];
if (!no_rats) {
// Request for answer to select
AppendCrc14443a(rats, 2);
ReaderTransmit(rats, sizeof(rats), NULL);
if (!no_rats) {
// Request for answer to select
AppendCrc14443a(rats, 2);
ReaderTransmit(rats, sizeof(rats), NULL);
}
void iso14443a_setup(uint8_t fpga_minor_mode) {
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Set up the synchronous serial port
}
void iso14443a_setup(uint8_t fpga_minor_mode) {
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Set up the synchronous serial port
+ // Set ADC to read field strength
+ AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST;
+ AT91C_BASE_ADC->ADC_MR =
+ ADC_MODE_PRESCALE(63) |
+ ADC_MODE_STARTUP_TIME(1) |
+ ADC_MODE_SAMPLE_HOLD_TIME(15);
+ AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ADC_CHAN_HF_LOW);
+
- 11 - WTX
-*/
-int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
+ 11 - WTX
+*/
+int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, bool send_chaining, void *data, uint8_t *res) {
-
- // ISO 14443 APDU frame: PCB [CID] [NAD] APDU CRC PCB=0x02
- real_cmd[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00)
- // put block number into the PCB
- real_cmd[0] |= iso14_pcb_blocknum;
- memcpy(real_cmd + 1, cmd, cmd_len);
+
+ if (cmd_len) {
+ // ISO 14443 APDU frame: PCB [CID] [NAD] APDU CRC PCB=0x02
+ real_cmd[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00)
+ if (send_chaining) {
+ real_cmd[0] |= 0x10;
+ }
+ // put block number into the PCB
+ real_cmd[0] |= iso14_pcb_blocknum;
+ memcpy(real_cmd + 1, cmd, cmd_len);
+ } else {
+ // R-block. ACK
+ real_cmd[0] = 0xA2; // r-block + ACK
+ real_cmd[0] |= iso14_pcb_blocknum;
+ }
ReaderTransmit(real_cmd, cmd_len + 3, NULL);
size_t len = ReaderReceive(data, parity);
ReaderTransmit(real_cmd, cmd_len + 3, NULL);
size_t len = ReaderReceive(data, parity);
uint32_t save_iso14a_timeout = iso14a_get_timeout();
// temporarily increase timeout
iso14a_set_timeout(MAX((data_bytes[1] & 0x3f) * save_iso14a_timeout, MAX_ISO14A_TIMEOUT));
uint32_t save_iso14a_timeout = iso14a_get_timeout();
// temporarily increase timeout
iso14a_set_timeout(MAX((data_bytes[1] & 0x3f) * save_iso14a_timeout, MAX_ISO14A_TIMEOUT));
// byte1 - WTXM [1..59]. command FWT=FWT*WTXM
data_bytes[1] = data_bytes[1] & 0x3f; // 2 high bits mandatory set to 0b
// now need to fix CRC.
AppendCrc14443a(data_bytes, len - 2);
// transmit S-Block
ReaderTransmit(data_bytes, len, NULL);
// byte1 - WTXM [1..59]. command FWT=FWT*WTXM
data_bytes[1] = data_bytes[1] & 0x3f; // 2 high bits mandatory set to 0b
// now need to fix CRC.
AppendCrc14443a(data_bytes, len - 2);
// transmit S-Block
ReaderTransmit(data_bytes, len, NULL);
// if we received an I- or R(ACK)-Block with a block number equal to the
// current block number, toggle the current block number
if (len >= 3 // PCB+CRC = 3 bytes
// if we received an I- or R(ACK)-Block with a block number equal to the
// current block number, toggle the current block number
if (len >= 3 // PCB+CRC = 3 bytes
- && ((data_bytes[0] & 0xC0) == 0 // I-Block
- || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
- && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers
+ && ((data_bytes[0] & 0xC0) == 0 // I-Block
+ || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
+ && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers
-
- // cut frame byte
- len -= 1;
- // memmove(data_bytes, data_bytes + 1, len);
- for (int i = 0; i < len; i++)
- data_bytes[i] = data_bytes[i + 1];
-
+
+ if (len) {
+ // cut frame byte
+ len -= 1;
+ // memmove(data_bytes, data_bytes + 1, len);
+ for (int i = 0; i < len; i++)
+ data_bytes[i] = data_bytes[i + 1];
+ }
+
// Read an ISO 14443a tag. Send out commands and store answers.
//
//-----------------------------------------------------------------------------
// Read an ISO 14443a tag. Send out commands and store answers.
//
//-----------------------------------------------------------------------------
iso14a_command_t param = c->arg[0];
uint8_t *cmd = c->d.asBytes;
size_t len = c->arg[1] & 0xffff;
size_t lenbits = c->arg[1] >> 16;
uint32_t timeout = c->arg[2];
uint32_t arg0 = 0;
iso14a_command_t param = c->arg[0];
uint8_t *cmd = c->d.asBytes;
size_t len = c->arg[1] & 0xffff;
size_t lenbits = c->arg[1] >> 16;
uint32_t timeout = c->arg[2];
uint32_t arg0 = 0;
LED_B_ON();
cmd_send(CMD_ACK,arg0,card->uidlen,0,buf,sizeof(iso14a_card_select_t));
LED_B_OFF();
LED_B_ON();
cmd_send(CMD_ACK,arg0,card->uidlen,0,buf,sizeof(iso14a_card_select_t));
LED_B_OFF();
- arg0 = iso14_apdu(cmd, len, buf);
+ uint8_t res;
+ arg0 = iso14_apdu(cmd, len, (param & ISO14A_SEND_CHAINING), buf, &res);
+ FpgaDisableTracing();
- cmd_send(CMD_ACK, arg0, 0, 0, buf, sizeof(buf));
+ cmd_send(CMD_ACK, arg0, res, 0, buf, sizeof(buf));
- ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 7), NULL, NULL); // first byte is always short (7bits) and no parity
+ ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 7), NULL, NULL); // first byte is always short (7bits) and no parity
- ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 8), NULL, NULL); // following bytes are 8 bit and no parity
+ ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 8), NULL, NULL); // following bytes are 8 bit and no parity
- ReaderTransmitBitsPar(cmd, lenbits, par, NULL); // bytes are 8 bit with odd parity
+ ReaderTransmitBitsPar(cmd, lenbits, par, NULL); // bytes are 8 bit with odd parity
- ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL); // first byte: 7 bits, no paritiy
+ ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL); // first byte: 7 bits, no paritiy
- ReaderTransmitBitsPar(&cmd[i++], 8, NULL, NULL); // following bytes: 8 bits, no paritiy
+ ReaderTransmitBitsPar(&cmd[i++], 8, NULL, NULL); // following bytes: 8 bits, no paritiy
- ReaderTransmit(cmd,len, NULL); // 8 bits, odd parity
+ ReaderTransmit(cmd,len, NULL); // 8 bits, odd parity
LED_B_ON();
cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf));
LED_B_ON();
cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf));
for (i = 1; i < 32768; i++) {
nttmp1 = prng_successor(nttmp1, 1);
if (nttmp1 == nt2) return i;
nttmp2 = prng_successor(nttmp2, 1);
if (nttmp2 == nt1) return -i;
}
for (i = 1; i < 32768; i++) {
nttmp1 = prng_successor(nttmp1, 1);
if (nttmp1 == nt2) return i;
nttmp2 = prng_successor(nttmp2, 1);
if (nttmp2 == nt1) return -i;
}
- byte_t nt_diff = 0;
- uint8_t par[1] = {0}; // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough
- static byte_t par_low = 0;
+ uint8_t nt_diff = 0;
+ uint8_t par[1] = {0}; // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough
+ static uint8_t par_low = 0;
- #define MAX_UNEXPECTED_RANDOM 4 // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up.
- #define MAX_SYNC_TRIES 32
- #define NUM_DEBUG_INFOS 8 // per strategy
- #define MAX_STRATEGY 3
+
+ #define MAX_UNEXPECTED_RANDOM 4 // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up.
+ #define MAX_SYNC_TRIES 32
+ #define SYNC_TIME_BUFFER 16 // if there is only SYNC_TIME_BUFFER left before next planned sync, wait for next PRNG cycle
+ #define NUM_DEBUG_INFOS 8 // per strategy
+ #define MAX_STRATEGY 3
if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
- // if we missed the sync time already, advance to the next nonce repeat
- while(GetCountSspClk() > sync_time) {
+ // if we missed the sync time already or are about to miss it, advance to the next nonce repeat
+ while(sync_time < GetCountSspClk() + SYNC_TIME_BUFFER) {
ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time);
} else {
// collect some information on tag nonces for debugging:
ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time);
} else {
// collect some information on tag nonces for debugging:
if (strategy == 0) {
// nonce distances at fixed time after card select:
sync_time = select_time + DEBUG_FIXED_SYNC_CYCLES;
if (strategy == 0) {
// nonce distances at fixed time after card select:
sync_time = select_time + DEBUG_FIXED_SYNC_CYCLES;
sync_time = DEBUG_FIXED_SYNC_CYCLES;
}
ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time);
sync_time = DEBUG_FIXED_SYNC_CYCLES;
}
ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time);
// Receive the (4 Byte) "random" nonce
if (!ReaderReceive(receivedAnswer, receivedAnswerPar)) {
// Receive the (4 Byte) "random" nonce
if (!ReaderReceive(receivedAnswer, receivedAnswerPar)) {
if (nt_distance == -99999) { // invalid nonce received
unexpected_random++;
if (unexpected_random > MAX_UNEXPECTED_RANDOM) {
if (nt_distance == -99999) { // invalid nonce received
unexpected_random++;
if (unexpected_random > MAX_UNEXPECTED_RANDOM) {
}
if (consecutive_resyncs < 3) {
if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d. nt_distance=%d. Consecutive Resyncs = %d. Trying one time catch up...\n", i, -catch_up_cycles, consecutive_resyncs);
}
}
if (consecutive_resyncs < 3) {
if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d. nt_distance=%d. Consecutive Resyncs = %d. Trying one time catch up...\n", i, -catch_up_cycles, consecutive_resyncs);
}
sync_cycles = sync_cycles + catch_up_cycles;
if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d for the fourth time consecutively (nt_distance = %d). Adjusting sync_cycles to %d.\n", i, -catch_up_cycles, sync_cycles);
last_catch_up = 0;
sync_cycles = sync_cycles + catch_up_cycles;
if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d for the fourth time consecutively (nt_distance = %d). Adjusting sync_cycles to %d.\n", i, -catch_up_cycles, sync_cycles);
last_catch_up = 0;
// Receive answer. This will be a 4 Bit NACK when the 8 parity bits are OK after decoding
if (ReaderReceive(receivedAnswer, receivedAnswerPar)) {
// Receive answer. This will be a 4 Bit NACK when the 8 parity bits are OK after decoding
if (ReaderReceive(receivedAnswer, receivedAnswerPar)) {
Dbprintf("collected debug info[%d][%d] = %d", i, j, debug_info[i][j]);
}
}
}
}
Dbprintf("collected debug info[%d][%d] = %d", i, j, debug_info[i][j]);
}
}
}
}
memcpy(buf + 0, uid, 4);
num_to_bytes(nt, 4, buf + 4);
memcpy(buf + 8, par_list, 8);
memcpy(buf + 16, ks_list, 8);
memcpy(buf + 0, uid, 4);
num_to_bytes(nt, 4, buf + 4);
memcpy(buf + 8, par_list, 8);
memcpy(buf + 16, ks_list, 8);
- memcpy(buf + 24, mf_nr_ar, 4);
-
- cmd_send(CMD_ACK, isOK, 0, 0, buf, 28);
+ memcpy(buf + 24, mf_nr_ar, 8);
+
+ cmd_send(CMD_ACK, isOK, 0, 0, buf, 32);
//-----------------------------------------------------------------------------
void RAMFUNC SniffMifare(uint8_t param) {
// param:
//-----------------------------------------------------------------------------
void RAMFUNC SniffMifare(uint8_t param) {
// param:
// check if a transaction is completed (timeout after 2000ms).
// if yes, stop the DMA transfer and send what we have so far to the client
// check if a transaction is completed (timeout after 2000ms).
// if yes, stop the DMA transfer and send what we have so far to the client
- if (readBufDataP <= dmaBufDataP){ // we are processing the same block of data which is currently being transferred
- dataLen = dmaBufDataP - readBufDataP; // number of bytes still to be processed
- } else {
+ if (readBufDataP <= dmaBufDataP){ // we are processing the same block of data which is currently being transferred
+ dataLen = dmaBufDataP - readBufDataP; // number of bytes still to be processed
+ } else {
dataLen = DMA_BUFFER_SIZE - readBufDataP + dmaBufDataP; // number of bytes still to be processed
}
// test for length of buffer
dataLen = DMA_BUFFER_SIZE - readBufDataP + dmaBufDataP; // number of bytes still to be processed
}
// test for length of buffer
if(dataLen > (9 * DMA_BUFFER_SIZE / 10)) {
Dbprintf("blew circular buffer! dataLen=0x%x", dataLen);
break;
if(dataLen > (9 * DMA_BUFFER_SIZE / 10)) {
Dbprintf("blew circular buffer! dataLen=0x%x", dataLen);
break;
uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
if(MillerDecoding(readerdata, (sniffCounter-1)*4)) {
uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
if(MillerDecoding(readerdata, (sniffCounter-1)*4)) {
if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, true)) break;
/* And ready to receive another command. */
UartInit(receivedCmd, receivedCmdPar);
if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, true)) break;
/* And ready to receive another command. */
UartInit(receivedCmd, receivedCmdPar);
uint8_t tagdata = (previous_data << 4) | (*data & 0x0F);
if(ManchesterDecoding(tagdata, 0, (sniffCounter-1)*4)) {
uint8_t tagdata = (previous_data << 4) | (*data & 0x0F);
if(ManchesterDecoding(tagdata, 0, (sniffCounter-1)*4)) {
if (MfSniffLogic(receivedResponse, Demod.len, Demod.parity, Demod.bitCount, false)) break;
if (MfSniffLogic(receivedResponse, Demod.len, Demod.parity, Demod.bitCount, false)) break;
Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
projects / proxmark3-svn / blobdiff