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"hf mf sniff" low level logics works.

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This commit is contained in:
Merlokbr@gmail.com 2012-07-11 15:52:33 +00:00
commit 39864b0bd4
10 changed files with 322 additions and 25 deletions
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44
armsrc/iso14443a.c
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@ -656,7 +656,6 @@ void RAMFUNC SnoopIso14443a(uint8_t param) {
if (!AT91C_BASE_PDC_SSC->PDC_RCR) {
AT91C_BASE_PDC_SSC->PDC_RPR = (uint32_t) dmaBuf;
AT91C_BASE_PDC_SSC->PDC_RCR = DMA_BUFFER_SIZE;
Dbprintf("RxEmpty ERROR!!! %d", dataLen); // temporary
}
// secondary buffer sets as primary, secondary buffer was stopped
if (!AT91C_BASE_PDC_SSC->PDC_RNCR) {
@ -2356,7 +2355,8 @@ void RAMFUNC SniffMifare(uint8_t param) {
// param:
// bit 0 - trigger from first card answer
// bit 1 - trigger from first reader 7-bit request
// C(red) A(yellow) B(green)
LEDsoff();
// init trace buffer
traceLen = 0;
@ -2378,7 +2378,6 @@ void RAMFUNC SniffMifare(uint8_t param) {
int8_t *data = dmaBuf;
int maxDataLen = 0;
int dataLen = 0;
// data = dmaBuf;
// Set up the demodulator for tag -> reader responses.
Demod.output = receivedResponse;
@ -2400,10 +2399,11 @@ void RAMFUNC SniffMifare(uint8_t param) {
LED_D_OFF();
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER);
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
// init sniffer
MfSniffInit();
int sniffCounter = 0;
// Count of samples received so far, so that we can include timing
// information in the trace buffer.
rsamples = 0;
// And now we loop, receiving samples.
while(true) {
if(BUTTON_PRESS()) {
@ -2413,6 +2413,13 @@ void RAMFUNC SniffMifare(uint8_t param) {
LED_A_ON();
WDT_HIT();
if (++sniffCounter > 65) {
if (MfSniffSend(2000)) {
AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN;
}
sniffCounter = 0;
}
int register readBufDataP = data - dmaBuf;
int register dmaBufDataP = DMA_BUFFER_SIZE - AT91C_BASE_PDC_SSC->PDC_RCR;
@ -2445,33 +2452,30 @@ void RAMFUNC SniffMifare(uint8_t param) {
LED_A_OFF();
rsamples += 4;
if(MillerDecoding((data[0] & 0xF0) >> 4)) {
LED_C_ON();
LED_C_INV();
// check - if there is a short 7bit request from reader
if ((Uart.byteCnt == 1) && (Uart.bitCnt = 9)) {
}
if (!LogTrace(receivedCmd, Uart.byteCnt, 0 - Uart.samples, Uart.parityBits, TRUE)) break;
if (MfSniffLogic(receivedCmd, Uart.byteCnt, Uart.bitCnt, TRUE)) break;
/* And ready to receive another command. */
Uart.state = STATE_UNSYNCD;
/* And also reset the demod code, which might have been */
/* false-triggered by the commands from the reader. */
/* And also reset the demod code */
Demod.state = DEMOD_UNSYNCD;
LED_B_OFF();
}
if(ManchesterDecoding(data[0] & 0x0F)) {
LED_B_ON();
LED_C_INV();
if (!LogTrace(receivedResponse, Demod.len, 0 - Demod.samples, Demod.parityBits, FALSE)) break;
if (MfSniffLogic(receivedResponse, Demod.len, Uart.bitCnt, FALSE)) break;
// And ready to receive another response.
memset(&Demod, 0, sizeof(Demod));
Demod.output = receivedResponse;
Demod.state = DEMOD_UNSYNCD;
LED_C_OFF();
/* And also reset the uart code */
Uart.state = STATE_UNSYNCD;
}
data++;
@ -2484,7 +2488,9 @@ void RAMFUNC SniffMifare(uint8_t param) {
done:
AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
MfSniffEnd();
Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.byteCnt=%x", maxDataLen, Uart.state, Uart.byteCnt);
Dbprintf("Uart.byteCntMax=%x, traceLen=%x, Uart.output[0]=%x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
Dbprintf("Uart.byteCntMax=%x, traceLen=%x", Uart.byteCntMax, traceLen);
LEDsoff();
}