Uart.startTime -= Uart.syncBit;
Uart.endTime = Uart.startTime;
Uart.state = STATE_START_OF_COMMUNICATION;
+ LED_B_ON();
}
} else {
if (IsMillerModulationNibble1(Uart.fourBits >> Uart.syncBit)) {
if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) { // Modulation in both halves - error
+ LED_B_OFF();
UartReset();
} else { // Modulation in first half = Sequence Z = logic "0"
if (Uart.state == STATE_MILLER_X) { // error - must not follow after X
+ LED_B_OFF();
UartReset();
} else {
Uart.bitCount++;
}
} 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.state = STATE_UNSYNCD;
Uart.bitCount--; // last "0" was part of EOC sequence
Uart.shiftReg <<= 1; // drop it
}
}
if (Uart.state == STATE_START_OF_COMMUNICATION) { // error - must not follow directly after SOC
+ LED_B_OFF();
UartReset();
} else { // a logic "0"
Uart.bitCount++;
Demod.startTime -= Demod.syncBit;
Demod.bitCount = offset; // number of decoded data bits
Demod.state = DEMOD_MANCHESTER_DATA;
+ LED_C_ON();
}
}
}
Demod.endTime = Demod.startTime + 8*(9*Demod.len + Demod.bitCount + 1);
} 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
// bit 1 - trigger from first reader 7-bit request
LEDsoff();
+ LED_A_ON();
iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
break;
}
- LED_A_ON();
WDT_HIT();
int register readBufDataP = data - dmaBuf;
AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
}
- LED_A_OFF();
-
if (rsamples & 0x01) { // Need two samples to feed Miller and Manchester-Decoder
if(!TagIsActive) { // no need to try decoding reader data if the tag is sending
uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
if (MillerDecoding(readerdata, (rsamples-1)*4)) {
- LED_C_ON();
-
// check - if there is a short 7bit request from reader
- if ((!triggered) && (param & 0x02) && (Uart.len == 1) && (Uart.bitCount == 7)) triggered = true;
-
+ if ((!triggered) && (param & 0x02) && (Uart.len == 1) && (Uart.bitCount == 7)) {
+ triggered = true;
+ }
if(triggered) {
if (!LogTrace(receivedCmd,
Uart.len,
/* And also reset the demod code, which might have been */
/* false-triggered by the commands from the reader. */
DemodReset();
- LED_B_OFF();
}
ReaderIsActive = (Uart.state != STATE_UNSYNCD);
}
- if(!ReaderIsActive) { // no need to try decoding tag data if the reader is sending - and we cannot afford the time
+ if (!ReaderIsActive) { // no need to try decoding tag data if the reader is sending - and we cannot afford the time
uint8_t tagdata = (previous_data << 4) | (*data & 0x0F);
- if(ManchesterDecoding(tagdata, 0, (rsamples-1)*4)) {
- LED_B_ON();
-
+ if (ManchesterDecoding(tagdata, 0, (rsamples-1)*4)) {
if (!LogTrace(receivedResponse,
Demod.len,
Demod.startTime*16 - DELAY_TAG_AIR2ARM_AS_SNIFFER,
Demod.endTime*16 - DELAY_TAG_AIR2ARM_AS_SNIFFER,
Demod.parity,
false)) break;
-
if ((!triggered) && (param & 0x01)) triggered = true;
-
// And ready to receive another response.
DemodReset();
// And reset the Miller decoder including itS (now outdated) input buffer
UartInit(receivedCmd, receivedCmdPar);
-
- LED_C_OFF();
}
TagIsActive = (Demod.state != DEMOD_UNSYNCD);
}
}
} // main cycle
- DbpString("COMMAND FINISHED");
-
FpgaDisableSscDma();
+ LEDsoff();
+
+ DbpString("COMMAND FINISHED");
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]);
- LEDsoff();
}
//-----------------------------------------------------------------------------
//-------------------------------------------------------------------------------------
static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing)
{
-
+ LED_D_ON();
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
uint32_t ThisTransferTime = 0;
bool correctionNeeded;
// Modulate Manchester
+ LED_D_OFF();
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD);
// include correction bit if necessary
// C(red) A(yellow) B(green)
LEDsoff();
+ LED_A_ON();
+
// init trace buffer
clear_trace();
set_tracing(true);
// Setup for the DMA.
FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); // set transfer address and number of bytes. Start transfer.
- LED_D_OFF();
-
// init sniffer
MfSniffInit();
break;
}
- LED_A_ON();
WDT_HIT();
if ((sniffCounter & 0x0000FFFF) == 0) { // from time to time
AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
}
- LED_A_OFF();
-
if (sniffCounter & 0x01) {
if(!TagIsActive) { // no need to try decoding tag data if the reader is sending
uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
if(MillerDecoding(readerdata, (sniffCounter-1)*4)) {
- LED_B_ON();
- LED_C_OFF();
if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, true)) break;
if(!ReaderIsActive) { // no need to try decoding tag data if the reader is sending
uint8_t tagdata = (previous_data << 4) | (*data & 0x0F);
if(ManchesterDecoding(tagdata, 0, (sniffCounter-1)*4)) {
- LED_B_OFF();
- LED_C_ON();
if (MfSniffLogic(receivedResponse, Demod.len, Demod.parity, Demod.bitCount, false)) break;
} // main cycle
+ FpgaDisableTracing();
+ FpgaDisableSscDma();
+ LEDsoff();
+
DbpString("COMMAND FINISHED.");
- FpgaDisableSscDma();
- FpgaDisableTracing();
MfSniffEnd();
Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
- LEDsoff();
}
projects / proxmark3-svn / blobdiff