Increase threshold to 160, fix for issue 756 (#760)

[proxmark3-svn] / armsrc / iso14443a.c

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index a8273e5e1bc1fda9d4ea358d15258ab49f070611..f5fcc91c49dbdd530c2b2b0f74499c3634e3fda9 100644 (file)
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -1220,7 +1220,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                        EmSendPrecompiledCmd(p_response);
                }
                
-               if (!tracing) {
+               if (!get_tracing()) {
                        Dbprintf("Trace Full. Simulation stopped.");
                        break;
                }
@@ -1405,7 +1405,7 @@ int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)
                                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);
+       AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ADC_CHAN_HF_LOW);
        // start ADC
        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;
        
@@ -1432,12 +1432,12 @@ int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)
                if (BUTTON_PRESS()) return 1;
 
                // test if the field exists
-               if (AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ADC_CHAN_HF)) {
+               if (AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ADC_CHAN_HF_LOW)) {
                        analogCnt++;
-                       analogAVG += AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF];
+                       analogAVG += AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF_LOW];
                        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;
                        if (analogCnt >= 32) {
-                               if ((MAX_ADC_HF_VOLTAGE * (analogAVG / analogCnt) >> 10) < MF_MINFIELDV) {
+                               if ((MAX_ADC_HF_VOLTAGE_LOW * (analogAVG / analogCnt) >> 10) < MF_MINFIELDV) {
                                        vtime = GetTickCount();
                                        if (!timer) timer = vtime;
                                        // 50ms no field --> card to idle state
@@ -1619,9 +1619,7 @@ void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t
                LED_A_ON();
   
        // Log reader command in trace buffer
-       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);
 }
 
 
@@ -1652,9 +1650,7 @@ void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing)
 static int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity)
 {
        if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, offset)) return 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);
        return Demod.len;
 }
 
@@ -1662,9 +1658,7 @@ static int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t
 int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity)
 {
        if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, 0)) return 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);
        return Demod.len;
 }
 
@@ -1889,7 +1883,7 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
 void iso14443a_setup(uint8_t fpga_minor_mode) {
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        // Set up the synchronous serial port
-       FpgaSetupSsc();
+       FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A);
        // connect Demodulated Signal to ADC:
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
@@ -1935,15 +1929,21 @@ b8 b7 b6 b5 b4 b3 b2 b1
 b5,b6 = 00 - DESELECT
         11 - WTX 
 */    
-int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
+int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data, uint8_t *res) {
        uint8_t parity[MAX_PARITY_SIZE];
        uint8_t real_cmd[cmd_len + 4];
        
-       // 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) 
+               // 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;
+       }
        AppendCrc14443a(real_cmd, cmd_len + 1);
  
        ReaderTransmit(real_cmd, cmd_len + 3, NULL);
@@ -1982,9 +1982,13 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
                {
                        iso14_pcb_blocknum ^= 1;
                }
+               
+               // if we received I-block with chaining we need to send ACK and receive another block of data
+               if (res)
+                       *res = data_bytes[0];
 
                // crc check
-               if (len >=3 && !CheckCrc14443(CRC_14443_A, data_bytes, len)) {
+               if (len >= 3 && !CheckCrc14443(CRC_14443_A, data_bytes, len)) {
                        return -1;
                }
                
@@ -2050,9 +2054,10 @@ void ReaderIso14443a(UsbCommand *c)
        }
 
        if(param & ISO14A_APDU && !cantSELECT) {
-               arg0 = iso14_apdu(cmd, len, buf);
+               uint8_t res;
+               arg0 = iso14_apdu(cmd, len, buf, &res);
                LED_B_ON();
-               cmd_send(CMD_ACK, arg0, 0, 0, buf, sizeof(buf));
+               cmd_send(CMD_ACK, arg0, res, 0, buf, sizeof(buf));
                LED_B_OFF();
        }