]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/iso14443a.c
"hf mf sniff" low level logics works.
[proxmark3-svn] / armsrc / iso14443a.c
index ce8467bfe37ed1bf78d7136a03002a90360eb03f..a564a32ffcc345b9630f61cf77b4ee0ca6f355aa 100644 (file)
@@ -1,5 +1,5 @@
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
-// Merlok - June 2011
+// Merlok - June 2011, 2012
 // Gerhard de Koning Gans - May 2008
 // Hagen Fritsch - June 2010
 //
 // Gerhard de Koning Gans - May 2008
 // Hagen Fritsch - June 2010
 //
 #include "crapto1.h"
 #include "mifareutil.h"
 
 #include "crapto1.h"
 #include "mifareutil.h"
 
-static uint8_t *trace = (uint8_t *) BigBuf;
-static int traceLen = 0;
-static int rsamples = 0;
-static int tracing = TRUE;
 static uint32_t iso14a_timeout;
 static uint32_t iso14a_timeout;
+uint8_t *trace = (uint8_t *) BigBuf;
+int traceLen = 0;
+int rsamples = 0;
+int tracing = TRUE;
+uint8_t trigger = 0;
 
 // CARD TO READER - manchester
 // Sequence D: 11110000 modulation with subcarrier during first half
 
 // CARD TO READER - manchester
 // Sequence D: 11110000 modulation with subcarrier during first half
@@ -41,7 +42,7 @@ static uint32_t iso14a_timeout;
 #define        SEC_Y 0x00
 #define        SEC_Z 0xc0
 
 #define        SEC_Y 0x00
 #define        SEC_Z 0xc0
 
-static const uint8_t OddByteParity[256] = {
+const uint8_t OddByteParity[256] = {
   1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
   0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
   0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
   1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
   0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
   0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
@@ -60,11 +61,18 @@ static const uint8_t OddByteParity[256] = {
   1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1
 };
 
   1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1
 };
 
-uint8_t trigger = 0;
+
 void iso14a_set_trigger(int enable) {
        trigger = enable;
 }
 
 void iso14a_set_trigger(int enable) {
        trigger = enable;
 }
 
+void iso14a_clear_tracelen(void) {
+       traceLen = 0;
+}
+void iso14a_set_tracing(int enable) {
+       tracing = enable;
+}
+
 //-----------------------------------------------------------------------------
 // Generate the parity value for a byte sequence
 //
 //-----------------------------------------------------------------------------
 // Generate the parity value for a byte sequence
 //
@@ -92,10 +100,11 @@ void AppendCrc14443a(uint8_t* data, int len)
   ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1);
 }
 
   ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1);
 }
 
-int LogTrace(const uint8_t * btBytes, int iLen, int iSamples, uint32_t dwParity, int bReader)
+// The function LogTrace() is also used by the iClass implementation in iClass.c
+int RAMFUNC LogTrace(const uint8_t * btBytes, int iLen, int iSamples, uint32_t dwParity, int bReader)
 {
   // Return when trace is full
 {
   // Return when trace is full
-  if (traceLen >= TRACE_LENGTH) return FALSE;
+  if (traceLen >= TRACE_SIZE) return FALSE;
 
   // Trace the random, i'm curious
   rsamples += iSamples;
 
   // Trace the random, i'm curious
   rsamples += iSamples;
@@ -120,36 +129,11 @@ int LogTrace(const uint8_t * btBytes, int iLen, int iSamples, uint32_t dwParity,
 // The software UART that receives commands from the reader, and its state
 // variables.
 //-----------------------------------------------------------------------------
 // The software UART that receives commands from the reader, and its state
 // variables.
 //-----------------------------------------------------------------------------
-static struct {
-    enum {
-        STATE_UNSYNCD,
-        STATE_START_OF_COMMUNICATION,
-               STATE_MILLER_X,
-               STATE_MILLER_Y,
-               STATE_MILLER_Z,
-        STATE_ERROR_WAIT
-    }       state;
-    uint16_t    shiftReg;
-    int     bitCnt;
-    int     byteCnt;
-    int     byteCntMax;
-    int     posCnt;
-    int     syncBit;
-       int     parityBits;
-       int     samples;
-    int     highCnt;
-    int     bitBuffer;
-       enum {
-               DROP_NONE,
-               DROP_FIRST_HALF,
-               DROP_SECOND_HALF
-       }               drop;
-    uint8_t   *output;
-} Uart;
+static tUart Uart;
 
 static RAMFUNC int MillerDecoding(int bit)
 {
 
 static RAMFUNC int MillerDecoding(int bit)
 {
-       int error = 0;
+       //int error = 0;
        int bitright;
 
        if(!Uart.bitBuffer) {
        int bitright;
 
        if(!Uart.bitBuffer) {
@@ -195,7 +179,7 @@ static RAMFUNC int MillerDecoding(int bit)
                                // measured a drop in first and second half
                                // which should not be possible
                                Uart.state = STATE_ERROR_WAIT;
                                // measured a drop in first and second half
                                // which should not be possible
                                Uart.state = STATE_ERROR_WAIT;
-                               error = 0x01;
+                               //error = 0x01;
                        }
 
                        Uart.posCnt = 0;
                        }
 
                        Uart.posCnt = 0;
@@ -206,7 +190,7 @@ static RAMFUNC int MillerDecoding(int bit)
                                        if(Uart.drop == DROP_SECOND_HALF) {
                                                // error, should not happen in SOC
                                                Uart.state = STATE_ERROR_WAIT;
                                        if(Uart.drop == DROP_SECOND_HALF) {
                                                // error, should not happen in SOC
                                                Uart.state = STATE_ERROR_WAIT;
-                                               error = 0x02;
+                                               //error = 0x02;
                                        }
                                        else {
                                                // correct SOC
                                        }
                                        else {
                                                // correct SOC
@@ -244,7 +228,7 @@ static RAMFUNC int MillerDecoding(int bit)
                                                // Would be STATE_MILLER_Z
                                                // but Z does not follow X, so error
                                                Uart.state = STATE_ERROR_WAIT;
                                                // Would be STATE_MILLER_Z
                                                // but Z does not follow X, so error
                                                Uart.state = STATE_ERROR_WAIT;
-                                               error = 0x03;
+                                               //error = 0x03;
                                        }
                                        if(Uart.drop == DROP_SECOND_HALF) {
                                                // We see a '1' and stay in state X
                                        }
                                        if(Uart.drop == DROP_SECOND_HALF) {
                                                // We see a '1' and stay in state X
@@ -365,7 +349,7 @@ static RAMFUNC int MillerDecoding(int bit)
                                Uart.bitCnt = 0;
                                Uart.byteCnt = 0;
                                Uart.parityBits = 0;
                                Uart.bitCnt = 0;
                                Uart.byteCnt = 0;
                                Uart.parityBits = 0;
-                               error = 0;
+                               //error = 0;
                        }
                        else {
                                Uart.highCnt = 0;
                        }
                        else {
                                Uart.highCnt = 0;
@@ -384,38 +368,13 @@ static RAMFUNC int MillerDecoding(int bit)
 //=============================================================================
 // ISO 14443 Type A - Manchester
 //=============================================================================
 //=============================================================================
 // ISO 14443 Type A - Manchester
 //=============================================================================
-
-static struct {
-    enum {
-        DEMOD_UNSYNCD,
-               DEMOD_START_OF_COMMUNICATION,
-               DEMOD_MANCHESTER_D,
-               DEMOD_MANCHESTER_E,
-               DEMOD_MANCHESTER_F,
-        DEMOD_ERROR_WAIT
-    }       state;
-    int     bitCount;
-    int     posCount;
-       int     syncBit;
-       int     parityBits;
-    uint16_t    shiftReg;
-       int     buffer;
-       int     buff;
-       int     samples;
-    int     len;
-       enum {
-               SUB_NONE,
-               SUB_FIRST_HALF,
-               SUB_SECOND_HALF
-       }               sub;
-    uint8_t   *output;
-} Demod;
+static tDemod Demod;
 
 static RAMFUNC int ManchesterDecoding(int v)
 {
        int bit;
        int modulation;
 
 static RAMFUNC int ManchesterDecoding(int v)
 {
        int bit;
        int modulation;
-       int error = 0;
+       //int error = 0;
 
        if(!Demod.buff) {
                Demod.buff = 1;
 
        if(!Demod.buff) {
                Demod.buff = 1;
@@ -472,7 +431,7 @@ static RAMFUNC int ManchesterDecoding(int v)
                                        case 0x01: Demod.samples = 0; break;
                                }
                        }
                                        case 0x01: Demod.samples = 0; break;
                                }
                        }
-                       error = 0;
+                       //error = 0;
                }
        }
        else {
                }
        }
        else {
@@ -496,7 +455,7 @@ static RAMFUNC int ManchesterDecoding(int v)
                                if(Demod.state!=DEMOD_ERROR_WAIT) {
                                        Demod.state = DEMOD_ERROR_WAIT;
                                        Demod.output[Demod.len] = 0xaa;
                                if(Demod.state!=DEMOD_ERROR_WAIT) {
                                        Demod.state = DEMOD_ERROR_WAIT;
                                        Demod.output[Demod.len] = 0xaa;
-                                       error = 0x01;
+                                       //error = 0x01;
                                }
                        }
                        else if(modulation) {
                                }
                        }
                        else if(modulation) {
@@ -511,7 +470,7 @@ static RAMFUNC int ManchesterDecoding(int v)
                                        else {
                                                Demod.output[Demod.len] = 0xab;
                                                Demod.state = DEMOD_ERROR_WAIT;
                                        else {
                                                Demod.output[Demod.len] = 0xab;
                                                Demod.state = DEMOD_ERROR_WAIT;
-                                               error = 0x02;
+                                               //error = 0x02;
                                        }
                                        break;
 
                                        }
                                        break;
 
@@ -549,7 +508,7 @@ static RAMFUNC int ManchesterDecoding(int v)
                                        else {
                                                Demod.output[Demod.len] = 0xad;
                                                Demod.state = DEMOD_ERROR_WAIT;
                                        else {
                                                Demod.output[Demod.len] = 0xad;
                                                Demod.state = DEMOD_ERROR_WAIT;
-                                               error = 0x03;
+                                               //error = 0x03;
                                        }
                                        break;
 
                                        }
                                        break;
 
@@ -609,169 +568,148 @@ static RAMFUNC int ManchesterDecoding(int v)
 // triggering so that we start recording at the point that the tag is moved
 // near the reader.
 //-----------------------------------------------------------------------------
 // triggering so that we start recording at the point that the tag is moved
 // near the reader.
 //-----------------------------------------------------------------------------
-void RAMFUNC SnoopIso14443a(void)
-{
-//     #define RECV_CMD_OFFSET         2032    // original (working as of 21/2/09) values
-//     #define RECV_RES_OFFSET         2096    // original (working as of 21/2/09) values
-//     #define DMA_BUFFER_OFFSET       2160    // original (working as of 21/2/09) values
-//     #define DMA_BUFFER_SIZE         4096    // original (working as of 21/2/09) values
-//     #define TRACE_LENGTH            2000    // original (working as of 21/2/09) values
-
-    // 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.
-    int triggered = FALSE; // FALSE to wait first for card
-
-    // The command (reader -> tag) that we're receiving.
+void RAMFUNC SnoopIso14443a(uint8_t param) {
+       // param:
+       // bit 0 - trigger from first card answer
+       // bit 1 - trigger from first reader 7-bit request
+       
+       LEDsoff();
+       // init trace buffer
+       traceLen = 0;
+       memset(trace, 0x44, TRACE_SIZE);
+
+       // 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
+       int triggered = !(param & 0x03); 
+
+       // The command (reader -> tag) that we're receiving.
        // The length of a received command will in most cases be no more than 18 bytes.
        // So 32 should be enough!
        // The length of a received command will in most cases be no more than 18 bytes.
        // So 32 should be enough!
-    uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
-    // The response (tag -> reader) that we're receiving.
-    uint8_t *receivedResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
-
-    // As we receive stuff, we copy it from receivedCmd or receivedResponse
-    // into trace, along with its length and other annotations.
-    //uint8_t *trace = (uint8_t *)BigBuf;
-    
-    traceLen = 0; // uncommented to fix ISSUE 15 - gerhard - jan2011
-
-    // The DMA buffer, used to stream samples from the FPGA
-    int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET;
-    int lastRxCounter;
-    int8_t *upTo;
-    int smpl;
-    int maxBehindBy = 0;
-
-    // Count of samples received so far, so that we can include timing
-    // information in the trace buffer.
-    int samples = 0;
-    int rsamples = 0;
-
-    memset(trace, 0x44, RECV_CMD_OFFSET);
-
-    // Set up the demodulator for tag -> reader responses.
-    Demod.output = receivedResponse;
-    Demod.len = 0;
-    Demod.state = DEMOD_UNSYNCD;
-
-    // Setup for the DMA.
-    FpgaSetupSsc();
-    upTo = dmaBuf;
-    lastRxCounter = DMA_BUFFER_SIZE;
-    FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
-
-    // And the reader -> tag commands
-    memset(&Uart, 0, sizeof(Uart));
-    Uart.output = receivedCmd;
-    Uart.byteCntMax = 32; // was 100 (greg)////////////////////////////////////////////////////////////////////////
-    Uart.state = STATE_UNSYNCD;
+       uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       // The response (tag -> reader) that we're receiving.
+       uint8_t *receivedResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
 
 
-    // And put the FPGA in the appropriate mode
-    // Signal field is off with the appropriate LED
-    LED_D_OFF();
-    FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER);
-    SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+       // As we receive stuff, we copy it from receivedCmd or receivedResponse
+       // into trace, along with its length and other annotations.
+       //uint8_t *trace = (uint8_t *)BigBuf;
+       
+       // The DMA buffer, used to stream samples from the FPGA
+       int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET;
+       int8_t *data = dmaBuf;
+       int maxDataLen = 0;
+       int dataLen = 0;
 
 
+       // Set up the demodulator for tag -> reader responses.
+       Demod.output = receivedResponse;
+       Demod.len = 0;
+       Demod.state = DEMOD_UNSYNCD;
 
 
-    // And now we loop, receiving samples.
-    for(;;) {
-        LED_A_ON();
-        WDT_HIT();
-        int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) &
-                                (DMA_BUFFER_SIZE-1);
-        if(behindBy > maxBehindBy) {
-            maxBehindBy = behindBy;
-            if(behindBy > 400) {
-                Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
-                goto done;
-            }
-        }
-        if(behindBy < 1) continue;
+       // Set up the demodulator for the reader -> tag commands
+       memset(&Uart, 0, sizeof(Uart));
+       Uart.output = receivedCmd;
+       Uart.byteCntMax = 32;                        // was 100 (greg)//////////////////
+       Uart.state = STATE_UNSYNCD;
 
 
-       LED_A_OFF();
-        smpl = upTo[0];
-        upTo++;
-        lastRxCounter -= 1;
-        if(upTo - dmaBuf > DMA_BUFFER_SIZE) {
-            upTo -= DMA_BUFFER_SIZE;
-            lastRxCounter += DMA_BUFFER_SIZE;
-            AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo;
-            AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
-        }
+       // Setup for the DMA.
+       FpgaSetupSsc();
+       FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
 
 
-        samples += 4;
-        if(MillerDecoding((smpl & 0xF0) >> 4)) {
-            rsamples = samples - Uart.samples;
-            LED_C_ON();
-            if(triggered) {
-                trace[traceLen++] = ((rsamples >>  0) & 0xff);
-                trace[traceLen++] = ((rsamples >>  8) & 0xff);
-                trace[traceLen++] = ((rsamples >> 16) & 0xff);
-                trace[traceLen++] = ((rsamples >> 24) & 0xff);
-                trace[traceLen++] = ((Uart.parityBits >>  0) & 0xff);
-                trace[traceLen++] = ((Uart.parityBits >>  8) & 0xff);
-                trace[traceLen++] = ((Uart.parityBits >> 16) & 0xff);
-                trace[traceLen++] = ((Uart.parityBits >> 24) & 0xff);
-                trace[traceLen++] = Uart.byteCnt;
-                memcpy(trace+traceLen, receivedCmd, Uart.byteCnt);
-                traceLen += Uart.byteCnt;
-                if(traceLen > TRACE_LENGTH) 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. */
-            Demod.state = DEMOD_UNSYNCD;
-            LED_B_OFF();
-        }
+       // And put the FPGA in the appropriate mode
+       // Signal field is off with the appropriate LED
+       LED_D_OFF();
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER);
+       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
 
-        if(ManchesterDecoding(smpl & 0x0F)) {
-            rsamples = samples - Demod.samples;
-            LED_B_ON();
-
-            // timestamp, as a count of samples
-            trace[traceLen++] = ((rsamples >>  0) & 0xff);
-            trace[traceLen++] = ((rsamples >>  8) & 0xff);
-            trace[traceLen++] = ((rsamples >> 16) & 0xff);
-            trace[traceLen++] = 0x80 | ((rsamples >> 24) & 0xff);
-            trace[traceLen++] = ((Demod.parityBits >>  0) & 0xff);
-            trace[traceLen++] = ((Demod.parityBits >>  8) & 0xff);
-            trace[traceLen++] = ((Demod.parityBits >> 16) & 0xff);
-            trace[traceLen++] = ((Demod.parityBits >> 24) & 0xff);
-            // length
-            trace[traceLen++] = Demod.len;
-            memcpy(trace+traceLen, receivedResponse, Demod.len);
-            traceLen += Demod.len;
-            if(traceLen > TRACE_LENGTH) break;
-
-            triggered = TRUE;
-
-            // And ready to receive another response.
-            memset(&Demod, 0, sizeof(Demod));
-            Demod.output = receivedResponse;
-            Demod.state = DEMOD_UNSYNCD;
-            LED_C_OFF();
-        }
+       // 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()) {
+                       DbpString("cancelled by button");
+                       goto done;
+               }
 
 
-        if(BUTTON_PRESS()) {
-            DbpString("cancelled_a");
-            goto done;
-        }
-    }
+               LED_A_ON();
+               WDT_HIT();
+
+               int register readBufDataP = data - dmaBuf;
+               int register dmaBufDataP = DMA_BUFFER_SIZE - AT91C_BASE_PDC_SSC->PDC_RCR;
+               if (readBufDataP <= dmaBufDataP){
+                       dataLen = dmaBufDataP - readBufDataP;
+               } else {
+                       dataLen = DMA_BUFFER_SIZE - readBufDataP + dmaBufDataP + 1;
+               }
+               // test for length of buffer
+               if(dataLen > maxDataLen) {
+                       maxDataLen = dataLen;
+                       if(dataLen > 400) {
+                               Dbprintf("blew circular buffer! dataLen=0x%x", dataLen);
+                               goto done;
+                       }
+               }
+               if(dataLen < 1) continue;
+
+               // primary buffer was stopped( <-- we lost data!
+               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;
+               }
+               // secondary buffer sets as primary, secondary buffer was stopped
+               if (!AT91C_BASE_PDC_SSC->PDC_RNCR) {
+                       AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf;
+                       AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
+               }
+
+               LED_A_OFF();
+               
+               rsamples += 4;
+               if(MillerDecoding((data[0] & 0xF0) >> 4)) {
+                       LED_C_ON();
 
 
-    DbpString("COMMAND FINISHED");
+                       // check - if there is a short 7bit request from reader
+                       if ((!triggered) && (param & 0x02) && (Uart.byteCnt == 1) && (Uart.bitCnt = 9)) triggered = TRUE;
 
 
-    Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
-    Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
+                       if(triggered) {
+                               if (!LogTrace(receivedCmd, Uart.byteCnt, 0 - Uart.samples, Uart.parityBits, 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. */
+                       Demod.state = DEMOD_UNSYNCD;
+                       LED_B_OFF();
+               }
+
+               if(ManchesterDecoding(data[0] & 0x0F)) {
+                       LED_B_ON();
+
+                       if (!LogTrace(receivedResponse, Demod.len, 0 - Demod.samples, Demod.parityBits, FALSE)) break;
+
+                       if ((!triggered) && (param & 0x01)) triggered = TRUE;
+
+                       // And ready to receive another response.
+                       memset(&Demod, 0, sizeof(Demod));
+                       Demod.output = receivedResponse;
+                       Demod.state = DEMOD_UNSYNCD;
+                       LED_C_OFF();
+               }
+
+               data++;
+               if(data > dmaBuf + DMA_BUFFER_SIZE) {
+                       data = dmaBuf;
+               }
+       } // main cycle
+
+       DbpString("COMMAND FINISHED");
 
 done:
 
 done:
-    AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
-    Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
-    Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
-    LED_A_OFF();
-    LED_B_OFF();
-       LED_C_OFF();
-       LED_D_OFF();
+       AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
+       Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.byteCnt=%x", maxDataLen, Uart.state, Uart.byteCnt);
+       Dbprintf("Uart.byteCntMax=%x, traceLen=%x, Uart.output[0]=%08x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
+       LEDsoff();
 }
 
 //-----------------------------------------------------------------------------
 }
 
 //-----------------------------------------------------------------------------
@@ -780,7 +718,6 @@ done:
 static void CodeIso14443aAsTagPar(const uint8_t *cmd, int len, uint32_t dwParity)
 {
        int i;
 static void CodeIso14443aAsTagPar(const uint8_t *cmd, int len, uint32_t dwParity)
 {
        int i;
-//     int oddparity;
 
        ToSendReset();
 
 
        ToSendReset();
 
@@ -802,9 +739,7 @@ static void CodeIso14443aAsTagPar(const uint8_t *cmd, int len, uint32_t dwParity
                uint8_t b = cmd[i];
 
                // Data bits
                uint8_t b = cmd[i];
 
                // Data bits
-//             oddparity = 0x01;
                for(j = 0; j < 8; j++) {
                for(j = 0; j < 8; j++) {
-//                     oddparity ^= (b & 1);
                        if(b & 1) {
                                ToSend[++ToSendMax] = SEC_D;
                        } else {
                        if(b & 1) {
                                ToSend[++ToSendMax] = SEC_D;
                        } else {
@@ -813,38 +748,19 @@ static void CodeIso14443aAsTagPar(const uint8_t *cmd, int len, uint32_t dwParity
                        b >>= 1;
                }
 
                        b >>= 1;
                }
 
-       // Get the parity bit
+               // Get the parity bit
                if ((dwParity >> i) & 0x01) {
                        ToSend[++ToSendMax] = SEC_D;
                } else {
                        ToSend[++ToSendMax] = SEC_E;
                }
                if ((dwParity >> i) & 0x01) {
                        ToSend[++ToSendMax] = SEC_D;
                } else {
                        ToSend[++ToSendMax] = SEC_E;
                }
-               
-                       // Parity bit
-//                     if(oddparity) {
-//                             ToSend[++ToSendMax] = SEC_D;
-//                     } else {
-//                             ToSend[++ToSendMax] = SEC_E;
-//                     }
-
-//             if (oddparity != ((dwParity >> i) & 0x01))
-//               Dbprintf("par error. i=%d", i);
        }
 
        // Send stopbit
        ToSend[++ToSendMax] = SEC_F;
 
        }
 
        // Send stopbit
        ToSend[++ToSendMax] = SEC_F;
 
-       // Flush the buffer in FPGA!!
-       for(i = 0; i < 5; i++) {
-               ToSend[++ToSendMax] = SEC_F;
-       }
-
        // Convert from last byte pos to length
        ToSendMax++;
        // Convert from last byte pos to length
        ToSendMax++;
-
-    // Add a few more for slop
-//    ToSend[ToSendMax++] = 0x00;
-//     ToSend[ToSendMax++] = 0x00;
 }
 
 static void CodeIso14443aAsTag(const uint8_t *cmd, int len){
 }
 
 static void CodeIso14443aAsTag(const uint8_t *cmd, int len){
@@ -980,45 +896,92 @@ static int EmSendCmd14443aRaw(uint8_t *resp, int respLen, int correctionNeeded);
 // 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 TagUid)
+void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd)
 {
 {
-       // This function contains the tag emulation
-
-       // Prepare protocol messages
-    // static const uint8_t cmd1[] = { 0x26 };
-//     static const uint8_t response1[] = { 0x02, 0x00 }; // Says: I am Mifare 4k - original line - greg
-//
-       static const uint8_t response1[] = { 0x44, 0x03 }; // Says: I am a DESFire Tag, ph33r me
-//     static const uint8_t response1[] = { 0x44, 0x00 }; // Says: I am a ULTRALITE Tag, 0wn me
-
-       // UID response
-    // static const uint8_t cmd2[] = { 0x93, 0x20 };
-    //static const uint8_t response2[] = { 0x9a, 0xe5, 0xe4, 0x43, 0xd8 }; // original value - greg
+  // Enable and clear the trace
+       tracing = TRUE;
+       traceLen = 0;
+  memset(trace, 0x44, TRACE_SIZE);
 
 
-// my desfire
-    static const uint8_t response2[] = { 0x88, 0x04, 0x21, 0x3f, 0x4d }; // known uid - note cascade (0x88), 2nd byte (0x04) = NXP/Phillips
+       // This function contains the tag emulation
+       uint8_t sak;
 
 
+       // The first response contains the ATQA (note: bytes are transmitted in reverse order).
+       uint8_t response1[2];
+       
+       switch (tagType) {
+               case 1: { // MIFARE Classic
+                       // Says: I am Mifare 1k - original line
+                       response1[0] = 0x04;
+                       response1[1] = 0x00;
+                       sak = 0x08;
+               } break;
+               case 2: { // MIFARE Ultralight
+                       // Says: I am a stupid memory tag, no crypto
+                       response1[0] = 0x04;
+                       response1[1] = 0x00;
+                       sak = 0x00;
+               } break;
+               case 3: { // MIFARE DESFire
+                       // Says: I am a DESFire tag, ph33r me
+                       response1[0] = 0x04;
+                       response1[1] = 0x03;
+                       sak = 0x20;
+               } break;
+               case 4: { // ISO/IEC 14443-4
+                       // Says: I am a javacard (JCOP)
+                       response1[0] = 0x04;
+                       response1[1] = 0x00;
+                       sak = 0x28;
+               } break;
+               default: {
+                       Dbprintf("Error: unkown tagtype (%d)",tagType);
+                       return;
+               } break;
+       }
+       
+       // The second response contains the (mandatory) first 24 bits of the UID
+       uint8_t response2[5];
+
+       // Check if the uid uses the (optional) part
+       uint8_t response2a[5];
+       if (uid_2nd) {
+               response2[0] = 0x88;
+               num_to_bytes(uid_1st,3,response2+1);
+               num_to_bytes(uid_2nd,4,response2a);
+               response2a[4] = response2a[0] ^ response2a[1] ^ response2a[2] ^ response2a[3];
+
+               // Configure the ATQA and SAK accordingly
+               response1[0] |= 0x40;
+               sak |= 0x04;
+       } else {
+               num_to_bytes(uid_1st,4,response2);
+               // Configure the ATQA and SAK accordingly
+               response1[0] &= 0xBF;
+               sak &= 0xFB;
+       }
 
 
-// When reader selects us during cascade1 it will send cmd3
-//uint8_t response3[] = { 0x04, 0x00, 0x00 }; // SAK Select (cascade1) successful response (ULTRALITE)
-uint8_t response3[] = { 0x24, 0x00, 0x00 }; // SAK Select (cascade1) successful response (DESFire)
-ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]);
+       // Calculate the BitCountCheck (BCC) for the first 4 bytes of the UID.
+       response2[4] = response2[0] ^ response2[1] ^ response2[2] ^ response2[3];
 
 
-// send cascade2 2nd half of UID
-static const uint8_t response2a[] = { 0x51, 0x48, 0x1d, 0x80, 0x84 }; //  uid - cascade2 - 2nd half (4 bytes) of UID+ BCCheck
-// NOTE : THE CRC on the above may be wrong as I have obfuscated the actual UID
+       // Prepare the mandatory SAK (for 4 and 7 byte UID)
+       uint8_t response3[3];
+       response3[0] = sak;
+       ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]);
 
 
-// When reader selects us during cascade2 it will send cmd3a
-//uint8_t response3a[] = { 0x00, 0x00, 0x00 }; // SAK Select (cascade2) successful response (ULTRALITE)
-uint8_t response3a[] = { 0x20, 0x00, 0x00 }; // SAK Select (cascade2) successful response (DESFire)
-ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
+       // Prepare the optional second SAK (for 7 byte UID), drop the cascade bit
+       uint8_t response3a[3];
+       response3a[0] = sak & 0xFB;
+       ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
 
 
-    static const uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce
+       uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce
+       uint8_t response6[] = { 0x03, 0x3B, 0x00, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS
+       ComputeCrc14443(CRC_14443_A, response6, 3, &response6[3], &response6[4]);
 
 
-    uint8_t *resp;
-    int respLen;
+       uint8_t *resp;
+       int respLen;
 
 
-    // Longest possible response will be 16 bytes + 2 CRC = 18 bytes
+  // Longest possible response will be 16 bytes + 2 CRC = 18 bytes
        // This will need
        //    144        data bits (18 * 8)
        //     18        parity bits
        // This will need
        //    144        data bits (18 * 8)
        //     18        parity bits
@@ -1031,41 +994,41 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
        // 166 bytes, since every bit that needs to be send costs us a byte
        //
 
        // 166 bytes, since every bit that needs to be send costs us a byte
        //
 
-    // Respond with card type
-    uint8_t *resp1 = (((uint8_t *)BigBuf) + 800);
-    int resp1Len;
+       // Respond with card type
+       uint8_t *resp1 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET);
+       int resp1Len;
 
 
-    // Anticollision cascade1 - respond with uid
-    uint8_t *resp2 = (((uint8_t *)BigBuf) + 970);
-    int resp2Len;
+       // Anticollision cascade1 - respond with uid
+       uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 166);
+       int resp2Len;
 
 
-    // Anticollision cascade2 - respond with 2nd half of uid if asked
-    // we're only going to be asked if we set the 1st byte of the UID (during cascade1) to 0x88
-    uint8_t *resp2a = (((uint8_t *)BigBuf) + 1140);
-    int resp2aLen;
+       // Anticollision cascade2 - respond with 2nd half of uid if asked
+       // we're only going to be asked if we set the 1st byte of the UID (during cascade1) to 0x88
+       uint8_t *resp2a = (((uint8_t *)BigBuf) + 1140);
+       int resp2aLen;
 
 
-    // Acknowledge select - cascade 1
-    uint8_t *resp3 = (((uint8_t *)BigBuf) + 1310);
-    int resp3Len;
+       // Acknowledge select - cascade 1
+       uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + (166*2));
+       int resp3Len;
 
 
-    // Acknowledge select - cascade 2
-    uint8_t *resp3a = (((uint8_t *)BigBuf) + 1480);
-    int resp3aLen;
+       // Acknowledge select - cascade 2
+       uint8_t *resp3a = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + (166*3));
+       int resp3aLen;
 
 
-    // Response to a read request - not implemented atm
-    uint8_t *resp4 = (((uint8_t *)BigBuf) + 1550);
-    int resp4Len;
+       // Response to a read request - not implemented atm
+       uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + (166*4));
+       int resp4Len;
 
 
-    // Authenticate response - nonce
-    uint8_t *resp5 = (((uint8_t *)BigBuf) + 1720);
-    int resp5Len;
+       // Authenticate response - nonce
+       uint8_t *resp5 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + (166*5));
+       int resp5Len;
 
 
-    uint8_t *receivedCmd = (uint8_t *)BigBuf;
-    int len;
+       // Authenticate response - nonce
+       uint8_t *resp6 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + (166*6));
+       int resp6Len;
 
 
-    int i;
-       int u;
-       uint8_t b;
+       uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       int len;
 
        // To control where we are in the protocol
        int order = 0;
 
        // To control where we are in the protocol
        int order = 0;
@@ -1075,34 +1038,35 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
        int happened = 0;
        int happened2 = 0;
 
        int happened = 0;
        int happened2 = 0;
 
-    int cmdsRecvd = 0;
+       int cmdsRecvd = 0;
+       uint8_t* respdata = NULL;
+       int respsize = 0;
+       uint8_t nack = 0x04;
 
 
-       int fdt_indicator;
-
-    memset(receivedCmd, 0x44, 400);
+       memset(receivedCmd, 0x44, RECV_CMD_SIZE);
 
        // Prepare the responses of the anticollision phase
        // there will be not enough time to do this at the moment the reader sends it REQA
 
        // Answer to request
        CodeIso14443aAsTag(response1, sizeof(response1));
 
        // Prepare the responses of the anticollision phase
        // there will be not enough time to do this at the moment the reader sends it REQA
 
        // Answer to request
        CodeIso14443aAsTag(response1, sizeof(response1));
-    memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax;
+       memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax;
 
        // Send our UID (cascade 1)
        CodeIso14443aAsTag(response2, sizeof(response2));
 
        // Send our UID (cascade 1)
        CodeIso14443aAsTag(response2, sizeof(response2));
-    memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax;
+       memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax;
 
        // Answer to select (cascade1)
        CodeIso14443aAsTag(response3, sizeof(response3));
 
        // Answer to select (cascade1)
        CodeIso14443aAsTag(response3, sizeof(response3));
-    memcpy(resp3, ToSend, ToSendMax); resp3Len = ToSendMax;
+       memcpy(resp3, ToSend, ToSendMax); resp3Len = ToSendMax;
 
        // Send the cascade 2 2nd part of the uid
        CodeIso14443aAsTag(response2a, sizeof(response2a));
 
        // Send the cascade 2 2nd part of the uid
        CodeIso14443aAsTag(response2a, sizeof(response2a));
-    memcpy(resp2a, ToSend, ToSendMax); resp2aLen = ToSendMax;
+       memcpy(resp2a, ToSend, ToSendMax); resp2aLen = ToSendMax;
 
        // Answer to select (cascade 2)
        CodeIso14443aAsTag(response3a, sizeof(response3a));
 
        // Answer to select (cascade 2)
        CodeIso14443aAsTag(response3a, sizeof(response3a));
-    memcpy(resp3a, ToSend, ToSendMax); resp3aLen = ToSendMax;
+       memcpy(resp3a, ToSend, ToSendMax); resp3aLen = ToSendMax;
 
        // Strange answer is an example of rare message size (3 bits)
        CodeStrangeAnswerAsTag();
 
        // Strange answer is an example of rare message size (3 bits)
        CodeStrangeAnswerAsTag();
@@ -1110,95 +1074,83 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
 
        // Authentication answer (random nonce)
        CodeIso14443aAsTag(response5, sizeof(response5));
 
        // Authentication answer (random nonce)
        CodeIso14443aAsTag(response5, sizeof(response5));
-    memcpy(resp5, ToSend, ToSendMax); resp5Len = ToSendMax;
+       memcpy(resp5, ToSend, ToSendMax); resp5Len = ToSendMax;
 
 
-    // We need to listen to the high-frequency, peak-detected path.
-    SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
-    FpgaSetupSsc();
+       // dummy ATS (pseudo-ATR), answer to RATS
+       CodeIso14443aAsTag(response6, sizeof(response6));
+       memcpy(resp6, ToSend, ToSendMax); resp6Len = ToSendMax;
 
 
-    cmdsRecvd = 0;
+       // We need to listen to the high-frequency, peak-detected path.
+       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+       FpgaSetupSsc();
 
 
-    LED_A_ON();
-       for(;;) {
+       cmdsRecvd = 0;
 
 
-               if(!GetIso14443aCommandFromReader(receivedCmd, &len, 100)) {
-            DbpString("button press");
-            break;
-        }
-       // doob - added loads of debug strings so we can see what the reader is saying to us during the sim as hi14alist is not populated
-        // Okay, look at the command now.
-        lastorder = order;
-               i = 1; // first byte transmitted
-        if(receivedCmd[0] == 0x26) {
-                       // Received a REQUEST
+       LED_A_ON();
+       for(;;) {
+       
+               if(!GetIso14443aCommandFromReader(receivedCmd, &len, RECV_CMD_SIZE)) {
+                       DbpString("button press");
+                       break;
+               }
+               // doob - added loads of debug strings so we can see what the reader is saying to us during the sim as hi14alist is not populated
+               // Okay, look at the command now.
+               lastorder = order;
+               if(receivedCmd[0] == 0x26) { // Received a REQUEST
                        resp = resp1; respLen = resp1Len; order = 1;
                        resp = resp1; respLen = resp1Len; order = 1;
-                       //DbpString("Hello request from reader:");
-               } else if(receivedCmd[0] == 0x52) {
-                       // Received a WAKEUP
+                       respdata = response1;
+                       respsize = sizeof(response1);
+               } else if(receivedCmd[0] == 0x52) { // Received a WAKEUP
                        resp = resp1; respLen = resp1Len; order = 6;
                        resp = resp1; respLen = resp1Len; order = 6;
-//                     //DbpString("Wakeup request from reader:");
-
-               } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x93) {   // greg - cascade 1 anti-collision
-                       // Received request for UID (cascade 1)
+                       respdata = response1;
+                       respsize = sizeof(response1);
+               } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x93) {   // Received request for UID (cascade 1)
                        resp = resp2; respLen = resp2Len; order = 2;
                        resp = resp2; respLen = resp2Len; order = 2;
-//                     DbpString("UID (cascade 1) request from reader:");
-//                     DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]);
-
-
-               } else if(receivedCmd[1] == 0x20 && receivedCmd[0] ==0x95) {    // greg - cascade 2 anti-collision
-                       // Received request for UID (cascade 2)
+                       respdata = response2;
+                       respsize = sizeof(response2);
+               } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x95) { // Received request for UID (cascade 2)
                        resp = resp2a; respLen = resp2aLen; order = 20;
                        resp = resp2a; respLen = resp2aLen; order = 20;
-//                     DbpString("UID (cascade 2) request from reader:");
-//                     DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]);
-
-
-               } else if(receivedCmd[1] == 0x70 && receivedCmd[0] ==0x93) {    // greg - cascade 1 select
-                       // Received a SELECT
+                       respdata = response2a;
+                       respsize = sizeof(response2a);
+               } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x93) {   // Received a SELECT (cascade 1)
                        resp = resp3; respLen = resp3Len; order = 3;
                        resp = resp3; respLen = resp3Len; order = 3;
-//                     DbpString("Select (cascade 1) request from reader:");
-//                     DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]);
-
-
-               } else if(receivedCmd[1] == 0x70 && receivedCmd[0] ==0x95) {    // greg - cascade 2 select
-                       // Received a SELECT
+                       respdata = response3;
+                       respsize = sizeof(response3);
+               } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x95) {   // Received a SELECT (cascade 2)
                        resp = resp3a; respLen = resp3aLen; order = 30;
                        resp = resp3a; respLen = resp3aLen; order = 30;
-//                     DbpString("Select (cascade 2) request from reader:");
-//                     DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]);
-
-
-               } else if(receivedCmd[0] == 0x30) {
-                       // Received a READ
+                       respdata = response3a;
+                       respsize = sizeof(response3a);
+               } else if(receivedCmd[0] == 0x30) {     // Received a (plain) READ
                        resp = resp4; respLen = resp4Len; order = 4; // Do nothing
                        resp = resp4; respLen = resp4Len; order = 4; // Do nothing
-                       Dbprintf("Read request from reader: %x %x %x",
-                               receivedCmd[0], receivedCmd[1], receivedCmd[2]);
-
-
-               } else if(receivedCmd[0] == 0x50) {
-                       // Received a HALT
-                       resp = resp1; respLen = 0; order = 5; // Do nothing
+                       Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]);
+                       respdata = &nack;
+                       respsize = sizeof(nack); // 4-bit answer
+               } else if(receivedCmd[0] == 0x50) {     // Received a HALT
                        DbpString("Reader requested we HALT!:");
                        DbpString("Reader requested we HALT!:");
-
-               } else if(receivedCmd[0] == 0x60) {
-                       // Received an authentication request
+                       // Do not respond
+                       resp = resp1; respLen = 0; order = 0;
+                       respdata = NULL;
+                       respsize = 0;
+               } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) {   // Received an authentication request
                        resp = resp5; respLen = resp5Len; order = 7;
                        resp = resp5; respLen = resp5Len; order = 7;
-                       Dbprintf("Authenticate request from reader: %x %x %x",
-                               receivedCmd[0], receivedCmd[1], receivedCmd[2]);
-
-               } else if(receivedCmd[0] == 0xE0) {
-                       // Received a RATS request
-                       resp = resp1; respLen = 0;order = 70;
-                       Dbprintf("RATS request from reader: %x %x %x",
-                               receivedCmd[0], receivedCmd[1], receivedCmd[2]);
-        } else {
-            // Never seen this command before
-               Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x",
+                       respdata = response5;
+                       respsize = sizeof(response5);
+               } else if(receivedCmd[0] == 0xE0) {     // Received a RATS request
+                       resp = resp6; respLen = resp6Len; order = 70;
+                       respdata = response6;
+                       respsize = sizeof(response6);
+               } else {
+                       // Never seen this command before
+                       Dbprintf("Received (len=%d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",
                        len,
                        receivedCmd[0], receivedCmd[1], receivedCmd[2],
                        receivedCmd[3], receivedCmd[4], receivedCmd[5],
                        receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                        // Do not respond
                        resp = resp1; respLen = 0; order = 0;
                        len,
                        receivedCmd[0], receivedCmd[1], receivedCmd[2],
                        receivedCmd[3], receivedCmd[4], receivedCmd[5],
                        receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                        // Do not respond
                        resp = resp1; respLen = 0; order = 0;
-        }
+                       respdata = NULL;
+                       respsize = 0;
+               }
 
                // Count number of wakeups received after a halt
                if(order == 6 && lastorder == 5) { happened++; }
 
                // Count number of wakeups received after a halt
                if(order == 6 && lastorder == 5) { happened++; }
@@ -1209,60 +1161,33 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
                // Look at last parity bit to determine timing of answer
                if((Uart.parityBits & 0x01) || receivedCmd[0] == 0x52) {
                        // 1236, so correction bit needed
                // Look at last parity bit to determine timing of answer
                if((Uart.parityBits & 0x01) || receivedCmd[0] == 0x52) {
                        // 1236, so correction bit needed
-                       i = 0;
+                       //i = 0;
                }
 
                }
 
-        memset(receivedCmd, 0x44, 32);
-
                if(cmdsRecvd > 999) {
                        DbpString("1000 commands later...");
                if(cmdsRecvd > 999) {
                        DbpString("1000 commands later...");
-            break;
-        }
-               else {
+                       break;
+               } else {
                        cmdsRecvd++;
                }
 
                        cmdsRecvd++;
                }
 
-        if(respLen <= 0) continue;
-               //----------------------------
-               u = 0;
-               b = 0x00;
-               fdt_indicator = FALSE;
-
-               EmSendCmd14443aRaw(resp, respLen, receivedCmd[0] == 0x52);
-/*        // Modulate Manchester
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD);
-        AT91C_BASE_SSC->SSC_THR = 0x00;
-        FpgaSetupSsc();
-
-               // ### Transmit the response ###
-               u = 0;
-               b = 0x00;
-               fdt_indicator = FALSE;
-        for(;;) {
-            if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
-                               volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                (void)b;
-            }
-            if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
-                               if(i > respLen) {
-                                       b = 0x00;
-                                       u++;
-                               } else {
-                                       b = resp[i];
-                                       i++;
-                               }
-                               AT91C_BASE_SSC->SSC_THR = b;
-
-                if(u > 4) {
-                    break;
-                }
-            }
-                       if(BUTTON_PRESS()) {
-                           break;
+               if(respLen > 0) {
+                       EmSendCmd14443aRaw(resp, respLen, receivedCmd[0] == 0x52);
+               }
+               
+               if (tracing) {
+                       LogTrace(receivedCmd,len, 0, Uart.parityBits, TRUE);
+                       if (respdata != NULL) {
+                               LogTrace(respdata,respsize, 0, SwapBits(GetParity(respdata,respsize),respsize), FALSE);
                        }
                        }
-        }
-*/
-    }
+                       if(traceLen > TRACE_SIZE) {
+                               DbpString("Trace full");
+                               break;
+                       }
+               }
+
+               memset(receivedCmd, 0x44, RECV_CMD_SIZE);
+  }
 
        Dbprintf("%x %x %x", happened, happened2, cmdsRecvd);
        LED_A_OFF();
 
        Dbprintf("%x %x %x", happened, happened2, cmdsRecvd);
        LED_A_OFF();
@@ -1888,7 +1813,7 @@ void ReaderMifare(uint32_t parameter)
        byte_t nt_diff = 0;
        LED_A_OFF();
        byte_t par = 0;
        byte_t nt_diff = 0;
        LED_A_OFF();
        byte_t par = 0;
-       byte_t par_mask = 0xff;
+       //byte_t par_mask = 0xff;
        byte_t par_low = 0;
        int led_on = TRUE;
        uint8_t uid[8];
        byte_t par_low = 0;
        int led_on = TRUE;
        uint8_t uid[8];
@@ -1932,14 +1857,14 @@ void ReaderMifare(uint32_t parameter)
                {
                        if ( (parameter != 0) && (memcmp(nt, nt_noattack, 4) == 0) ) continue;
 
                {
                        if ( (parameter != 0) && (memcmp(nt, nt_noattack, 4) == 0) ) continue;
 
-                       isNULL = (nt_attacked[0] = 0) && (nt_attacked[1] = 0) && (nt_attacked[2] = 0) && (nt_attacked[3] = 0);
+                       isNULL = !(nt_attacked[0] == 0) && (nt_attacked[1] == 0) && (nt_attacked[2] == 0) && (nt_attacked[3] == 0);
                        if ( (isNULL != 0 ) && (memcmp(nt, nt_attacked, 4) != 0) ) continue;
 
                        if (nt_diff == 0)
                        {
                                LED_A_ON();
                                memcpy(nt_attacked, nt, 4);
                        if ( (isNULL != 0 ) && (memcmp(nt, nt_attacked, 4) != 0) ) continue;
 
                        if (nt_diff == 0)
                        {
                                LED_A_ON();
                                memcpy(nt_attacked, nt, 4);
-                               par_mask = 0xf8;
+                               //par_mask = 0xf8;
                                par_low = par & 0x07;
                        }
 
                                par_low = par & 0x07;
                        }
 
@@ -1989,708 +1914,131 @@ void ReaderMifare(uint32_t parameter)
        if (MF_DBGLEVEL >= 1)   DbpString("COMMAND mifare FINISHED");
 }
 
        if (MF_DBGLEVEL >= 1)   DbpString("COMMAND mifare FINISHED");
 }
 
+
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
-// Select, Authenticaate, Read an MIFARE tag
-// read block
+// MIFARE 1K simulate
+// 
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
-void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
+void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 {
 {
-  // params
-       uint8_t blockNo = arg0;
-       uint8_t keyType = arg1;
-       uint64_t ui64Key = 0;
-       ui64Key = bytes_to_num(datain, 6);
-       
-       // variables
-       byte_t isOK = 0;
-       byte_t dataoutbuf[16];
-       uint8_t uid[8];
-       uint32_t cuid;
+       int cardSTATE = MFEMUL_NOFIELD;
+       int _7BUID = 0;
+       int vHf = 0;    // in mV
+       //int nextCycleTimeout = 0;
+       int res;
+//     uint32_t timer = 0;
+       uint32_t selTimer = 0;
+       uint32_t authTimer = 0;
+       uint32_t par = 0;
+       int len = 0;
+       uint8_t cardWRBL = 0;
+       uint8_t cardAUTHSC = 0;
+       uint8_t cardAUTHKEY = 0xff;  // no authentication
+       //uint32_t cardRn = 0;
+       uint32_t cardRr = 0;
+       uint32_t cuid = 0;
+       //uint32_t rn_enc = 0;
+       uint32_t ans = 0;
+       uint32_t cardINTREG = 0;
+       uint8_t cardINTBLOCK = 0;
        struct Crypto1State mpcs = {0, 0};
        struct Crypto1State *pcs;
        pcs = &mpcs;
        struct Crypto1State mpcs = {0, 0};
        struct Crypto1State *pcs;
        pcs = &mpcs;
-
-       // clear trace
-       traceLen = 0;
-//     tracing = false;
-
-       iso14443a_setup();
-
-       LED_A_ON();
-       LED_B_OFF();
-       LED_C_OFF();
-
-       while (true) {
-               if(!iso14443a_select_card(uid, NULL, &cuid)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
-                       break;
-               };
-
-               if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
-                       break;
-               };
-               
-               if(mifare_classic_readblock(pcs, cuid, blockNo, dataoutbuf)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Read block error");
-                       break;
-               };
-
-               if(mifare_classic_halt(pcs, cuid)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
-                       break;
-               };
-               
-               isOK = 1;
-               break;
-       }
        
        
-       //  ----------------------------- crypto1 destroy
-       crypto1_destroy(pcs);
-       
-       if (MF_DBGLEVEL >= 2)   DbpString("READ BLOCK FINISHED");
-
-       // add trace trailer
-       memset(uid, 0x44, 4);
-       LogTrace(uid, 4, 0, 0, TRUE);
-
-       UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
-       memcpy(ack.d.asBytes, dataoutbuf, 16);
+       uint8_t* receivedCmd = eml_get_bigbufptr_recbuf();
+       uint8_t *response = eml_get_bigbufptr_sendbuf();
        
        
-       LED_B_ON();
-       UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
-       LED_B_OFF();
+       static uint8_t rATQA[] = {0x04, 0x00}; // Mifare classic 1k 4BUID
 
 
+       static uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; 
+       static uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!!
+               
+       static uint8_t rSAK[] = {0x08, 0xb6, 0xdd};
+       static uint8_t rSAK1[] = {0x04, 0xda, 0x17};
 
 
-  // Thats it...
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LEDsoff();
-//  tracing = TRUE;
+       static uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04};
+//     static uint8_t rAUTH_NT[] = {0x1a, 0xac, 0xff, 0x4f};
+       static uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
 
 
-}
+       // clear trace
+       traceLen = 0;
+       tracing = true;
 
 
-//-----------------------------------------------------------------------------
-// Select, Authenticaate, Read an MIFARE tag. 
-// read sector (data = 4 x 16 bytes = 64 bytes)
-//-----------------------------------------------------------------------------
-void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
-{
-  // params
-       uint8_t sectorNo = arg0;
-       uint8_t keyType = arg1;
-       uint64_t ui64Key = 0;
-       ui64Key = bytes_to_num(datain, 6);
+  // Authenticate response - nonce
+       uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
        
        
-       // variables
-       byte_t isOK = 0;
-       byte_t dataoutbuf[16 * 4];
-       uint8_t uid[8];
-       uint32_t cuid;
-       struct Crypto1State mpcs = {0, 0};
-       struct Crypto1State *pcs;
-       pcs = &mpcs;
+       // get UID from emul memory
+       emlGetMemBt(receivedCmd, 7, 1);
+       _7BUID = !(receivedCmd[0] == 0x00);
+       if (!_7BUID) {                     // ---------- 4BUID
+               rATQA[0] = 0x04;
+
+               emlGetMemBt(rUIDBCC1, 0, 4);
+               rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
+       } else {                           // ---------- 7BUID
+               rATQA[0] = 0x44;
+
+               rUIDBCC1[0] = 0x88;
+               emlGetMemBt(&rUIDBCC1[1], 0, 3);
+               rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
+               emlGetMemBt(rUIDBCC2, 3, 4);
+               rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
+       }
 
 
-       // clear trace
-       traceLen = 0;
-//     tracing = false;
+// --------------------------------------      test area
 
 
-       iso14443a_setup();
+// --------------------------------------      END test area
+       // start mkseconds counter
+       StartCountUS();
 
 
-       LED_A_ON();
-       LED_B_OFF();
-       LED_C_OFF();
+       // We need to listen to the high-frequency, peak-detected path.
+       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+       FpgaSetupSsc();
+
+  FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+       SpinDelay(200);
 
 
+       if (MF_DBGLEVEL >= 1)   Dbprintf("Started. 7buid=%d", _7BUID);
+       // calibrate mkseconds counter
+       GetDeltaCountUS();
        while (true) {
        while (true) {
-               if(!iso14443a_select_card(uid, NULL, &cuid)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
-                       break;
-               };
+               WDT_HIT();
 
 
-               if(mifare_classic_auth(pcs, cuid, sectorNo * 4, keyType, ui64Key, AUTH_FIRST)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
+               if(BUTTON_PRESS()) {
                        break;
                        break;
-               };
+               }
+
+               // find reader field
+               // Vref = 3300mV, and an 10:1 voltage divider on the input
+               // can measure voltages up to 33000 mV
+               if (cardSTATE == MFEMUL_NOFIELD) {
+                       vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10;
+                       if (vHf > MF_MINFIELDV) {
+                               cardSTATE_TO_IDLE();
+                               LED_A_ON();
+                       }
+               } 
+
+               if (cardSTATE != MFEMUL_NOFIELD) {
+                       res = EmGetCmd(receivedCmd, &len, RECV_CMD_SIZE); // (+ nextCycleTimeout)
+                       if (res == 2) {
+                               cardSTATE = MFEMUL_NOFIELD;
+                               LEDsoff();
+                               continue;
+                       }
+                       if(res) break;
+               }
                
                
-               if(mifare_classic_readblock(pcs, cuid, sectorNo * 4 + 0, dataoutbuf + 16 * 0)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Read block 0 error");
-                       break;
-               };
-               if(mifare_classic_readblock(pcs, cuid, sectorNo * 4 + 1, dataoutbuf + 16 * 1)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Read block 1 error");
-                       break;
-               };
-               if(mifare_classic_readblock(pcs, cuid, sectorNo * 4 + 2, dataoutbuf + 16 * 2)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Read block 2 error");
-                       break;
-               };
-               if(mifare_classic_readblock(pcs, cuid, sectorNo * 4 + 3, dataoutbuf + 16 * 3)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Read block 3 error");
-                       break;
-               };
+               //nextCycleTimeout = 0;
                
                
-               if(mifare_classic_halt(pcs, cuid)) {
-               if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
-                       break;
-               };
-
-               isOK = 1;
-               break;
-       }
-       
-       //  ----------------------------- crypto1 destroy
-       crypto1_destroy(pcs);
-       
-       if (MF_DBGLEVEL >= 2) DbpString("READ SECTOR FINISHED");
+//             if (len) Dbprintf("len:%d cmd: %02x %02x %02x %02x", len, receivedCmd[0], receivedCmd[1], receivedCmd[2], receivedCmd[3]);
 
 
-       // add trace trailer
-       memset(uid, 0x44, 4);
-       LogTrace(uid, 4, 0, 0, TRUE);
-
-       UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
-       memcpy(ack.d.asBytes, dataoutbuf, 16 * 2);
-       
-       LED_B_ON();
-       UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
-
-       SpinDelay(100);
-       
-       memcpy(ack.d.asBytes, dataoutbuf + 16 * 2, 16 * 2);
-       UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
-       LED_B_OFF();    
-
-       // Thats it...
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LEDsoff();
-//  tracing = TRUE;
-
-}
-
-//-----------------------------------------------------------------------------
-// Select, Authenticaate, Read an MIFARE tag. 
-// read block
-//-----------------------------------------------------------------------------
-void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
-{
-       // params
-       uint8_t blockNo = arg0;
-       uint8_t keyType = arg1;
-       uint64_t ui64Key = 0;
-       byte_t blockdata[16];
-
-       ui64Key = bytes_to_num(datain, 6);
-       memcpy(blockdata, datain + 10, 16);
-       
-       // variables
-       byte_t isOK = 0;
-       uint8_t uid[8];
-       uint32_t cuid;
-       struct Crypto1State mpcs = {0, 0};
-       struct Crypto1State *pcs;
-       pcs = &mpcs;
-
-       // clear trace
-       traceLen = 0;
-//  tracing = false;
-
-       iso14443a_setup();
-
-       LED_A_ON();
-       LED_B_OFF();
-       LED_C_OFF();
-
-       while (true) {
-                       if(!iso14443a_select_card(uid, NULL, &cuid)) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
-                       break;
-               };
-
-               if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
-                       break;
-               };
-               
-               if(mifare_classic_writeblock(pcs, cuid, blockNo, blockdata)) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Write block error");
-                       break;
-               };
-
-               if(mifare_classic_halt(pcs, cuid)) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
-                       break;
-               };
-               
-               isOK = 1;
-               break;
-       }
-       
-       //  ----------------------------- crypto1 destroy
-       crypto1_destroy(pcs);
-       
-       if (MF_DBGLEVEL >= 2)   DbpString("WRITE BLOCK FINISHED");
-
-       // add trace trailer
-       memset(uid, 0x44, 4);
-       LogTrace(uid, 4, 0, 0, TRUE);
-
-       UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
-       
-       LED_B_ON();
-       UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
-       LED_B_OFF();    
-
-
-       // Thats it...
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LEDsoff();
-//  tracing = TRUE;
-
-}
-
-// Return 1 if the nonce is invalid else return 0
-int valid_nonce(uint32_t Nt, uint32_t NtEnc, uint32_t Ks1, byte_t * parity) {
-       return ((oddparity((Nt >> 24) & 0xFF) == ((parity[0]) ^ oddparity((NtEnc >> 24) & 0xFF) ^ BIT(Ks1,16))) & \
-       (oddparity((Nt >> 16) & 0xFF) == ((parity[1]) ^ oddparity((NtEnc >> 16) & 0xFF) ^ BIT(Ks1,8))) & \
-       (oddparity((Nt >> 8) & 0xFF) == ((parity[2]) ^ oddparity((NtEnc >> 8) & 0xFF) ^ BIT(Ks1,0)))) ? 1 : 0;
-}
-
-
-//-----------------------------------------------------------------------------
-// MIFARE nested authentication. 
-// 
-//-----------------------------------------------------------------------------
-void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain)
-{
-       // params
-       uint8_t blockNo = arg0;
-       uint8_t keyType = arg1;
-       uint8_t targetBlockNo = arg2 & 0xff;
-       uint8_t targetKeyType = (arg2 >> 8) & 0xff;
-       uint64_t ui64Key = 0;
-
-       ui64Key = bytes_to_num(datain, 6);
-       
-       // variables
-       int rtr, i, j, m, len;
-       int davg, dmin, dmax;
-       uint8_t uid[8];
-       uint32_t cuid, nt1, nt2, nttmp, nttest, par, ks1;
-       uint8_t par_array[4];
-       nestedVector nvector[NES_MAX_INFO + 1][10];
-       int nvectorcount[NES_MAX_INFO + 1];
-       int ncount = 0;
-       UsbCommand ack = {CMD_ACK, {0, 0, 0}};
-       struct Crypto1State mpcs = {0, 0};
-       struct Crypto1State *pcs;
-       pcs = &mpcs;
-       uint8_t* receivedAnswer = mifare_get_bigbufptr();
-
-       //init
-       for (i = 0; i < NES_MAX_INFO + 1; i++) nvectorcount[i] = 11;  //  11 - empty block;
-       
-       // clear trace
-       traceLen = 0;
-  tracing = false;
-       
-       iso14443a_setup();
-
-       LED_A_ON();
-       LED_B_ON();
-       LED_C_OFF();
-
-  FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-  SpinDelay(200);
-       
-       davg = dmax = 0;
-       dmin = 2000;
-
-       // test nonce distance
-       for (rtr = 0; rtr < 10; rtr++) {
-    FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-    SpinDelay(100);
-    FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
-
-    // Test if the action was cancelled
-    if(BUTTON_PRESS()) {
-      break;
-    }
-
-               if(!iso14443a_select_card(uid, NULL, &cuid)) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
-                       break;
-               };
-               
-               if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1)) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Auth1 error");
-                       break;
-               };
-
-               if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_NESTED, &nt2)) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Auth2 error");
-                       break;
-               };
-               
-               nttmp = prng_successor(nt1, 500);
-               for (i = 501; i < 2000; i++) {
-                       nttmp = prng_successor(nttmp, 1);
-                       if (nttmp == nt2) break;
-               }
-               
-               if (i != 2000) {
-                       davg += i;
-                       if (dmin > i) dmin = i;
-                       if (dmax < i) dmax = i;
-                       if (MF_DBGLEVEL >= 4)   Dbprintf("r=%d nt1=%08x nt2=%08x distance=%d", rtr, nt1, nt2, i);
-               }
-       }
-       
-       if (rtr == 0)   return;
-
-       davg = davg / rtr;
-       if (MF_DBGLEVEL >= 3)   Dbprintf("distance: min=%d max=%d avg=%d", dmin, dmax, davg);
-
-       LED_B_OFF();
-
-//  -------------------------------------------------------------------------------------------------  
-       
-       LED_C_ON();
-
-       //  get crypted nonces for target sector
-       for (rtr = 0; rtr < NS_RETRIES_GETNONCE; rtr++) {
-       if (MF_DBGLEVEL >= 4)                   Dbprintf("------------------------------");
-
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-    SpinDelay(100);
-    FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
-
-    // Test if the action was cancelled
-    if(BUTTON_PRESS()) {
-      break;
-    }
-
-               if(!iso14443a_select_card(uid, NULL, &cuid)) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
-                       break;
-               };
-               
-               if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1)) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Auth1 error");
-                       break;
-               };
-
-               // nested authentication
-               len = mifare_sendcmd_shortex(pcs, AUTH_NESTED, 0x60 + (targetKeyType & 0x01), targetBlockNo, receivedAnswer, &par);
-               if (len != 4) {
-                       if (MF_DBGLEVEL >= 1)   Dbprintf("Auth2 error len=%d", len);
-                       break;
-               };
-       
-               nt2 = bytes_to_num(receivedAnswer, 4);          
-               if (MF_DBGLEVEL >= 4)   Dbprintf("r=%d nt1=%08x nt2enc=%08x nt2par=%08x", rtr, nt1, nt2, par);
-               
-               // Parity validity check
-               for (i = 0; i < 4; i++) {
-                       par_array[i] = (oddparity(receivedAnswer[i]) != ((par & 0x08) >> 3));
-                       par = par << 1;
-               }
-               
-               ncount = 0;
-               for (m = dmin - NS_TOLERANCE; m < dmax + NS_TOLERANCE; m++) {
-                       nttest = prng_successor(nt1, m);
-                       ks1 = nt2 ^ nttest;
-
-                       if (valid_nonce(nttest, nt2, ks1, par_array) && (ncount < 11)){
-                               
-                               nvector[NES_MAX_INFO][ncount].nt = nttest;
-                               nvector[NES_MAX_INFO][ncount].ks1 = ks1;
-                               ncount++;
-                               nvectorcount[NES_MAX_INFO] = ncount;
-                               if (MF_DBGLEVEL >= 4)   Dbprintf("valid m=%d ks1=%08x nttest=%08x", m, ks1, nttest);
-                       }
-
-               }
-               
-               // select vector with length less than got
-               if (nvectorcount[NES_MAX_INFO] != 0) {
-                       m = NES_MAX_INFO;
-                       
-                       for (i = 0; i < NES_MAX_INFO; i++)
-                               if (nvectorcount[i] > 10) {
-                                       m = i;
-                                       break;
-                               }
-                               
-                       if (m == NES_MAX_INFO)
-                               for (i = 0; i < NES_MAX_INFO; i++)
-                                       if (nvectorcount[NES_MAX_INFO] < nvectorcount[i]) {
-                                               m = i;
-                                               break;
-                                       }
-                                       
-                       if (m != NES_MAX_INFO) {
-                               for (i = 0; i < nvectorcount[m]; i++) {
-                                       nvector[m][i] = nvector[NES_MAX_INFO][i];
-                               }
-                               nvectorcount[m] = nvectorcount[NES_MAX_INFO];
-                       }
-               }
-       }
-
-       LED_C_OFF();
-       
-       //  ----------------------------- crypto1 destroy
-       crypto1_destroy(pcs);
-       
-       // add trace trailer
-       memset(uid, 0x44, 4);
-       LogTrace(uid, 4, 0, 0, TRUE);
-
-       for (i = 0; i < NES_MAX_INFO; i++) {
-               if (nvectorcount[i] > 10) continue;
-               
-               for (j = 0; j < nvectorcount[i]; j += 5) {
-                       ncount = nvectorcount[i] - j;
-                       if (ncount > 5) ncount = 5; 
-
-                       ack.arg[0] = 0; // isEOF = 0
-                       ack.arg[1] = ncount;
-                       ack.arg[2] = targetBlockNo + (targetKeyType * 0x100);
-                       memset(ack.d.asBytes, 0x00, sizeof(ack.d.asBytes));
-                       
-                       memcpy(ack.d.asBytes, &cuid, 4);
-                       for (m = 0; m < ncount; m++) {
-                               memcpy(ack.d.asBytes + 8 + m * 8 + 0, &nvector[i][m + j].nt, 4);
-                               memcpy(ack.d.asBytes + 8 + m * 8 + 4, &nvector[i][m + j].ks1, 4);
-                       }
-       
-                       LED_B_ON();
-                       SpinDelay(100);
-                       UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
-                       LED_B_OFF();    
-               }
-       }
-
-       // finalize list
-       ack.arg[0] = 1; // isEOF = 1
-       ack.arg[1] = 0;
-       ack.arg[2] = 0;
-       memset(ack.d.asBytes, 0x00, sizeof(ack.d.asBytes));
-       
-       LED_B_ON();
-       SpinDelay(300);
-       UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
-       LED_B_OFF();    
-
-       if (MF_DBGLEVEL >= 4)   DbpString("NESTED FINISHED");
-
-       // Thats it...
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LEDsoff();
-       
-  tracing = TRUE;
-}
-
-//-----------------------------------------------------------------------------
-// MIFARE check keys. key count up to 8. 
-// 
-//-----------------------------------------------------------------------------
-void MifareChkKeys(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
-{
-  // params
-       uint8_t blockNo = arg0;
-       uint8_t keyType = arg1;
-       uint8_t keyCount = arg2;
-       uint64_t ui64Key = 0;
-       
-       // variables
-       int i;
-       byte_t isOK = 0;
-       uint8_t uid[8];
-       uint32_t cuid;
-       struct Crypto1State mpcs = {0, 0};
-       struct Crypto1State *pcs;
-       pcs = &mpcs;
-       
-       // clear debug level
-       int OLD_MF_DBGLEVEL = MF_DBGLEVEL;      
-       MF_DBGLEVEL = MF_DBG_NONE;
-       
-       // clear trace
-       traceLen = 0;
-  tracing = TRUE;
-
-       iso14443a_setup();
-
-       LED_A_ON();
-       LED_B_OFF();
-       LED_C_OFF();
-
-       SpinDelay(300);
-       for (i = 0; i < keyCount; i++) {
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-    SpinDelay(100);
-    FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
-
-               if(!iso14443a_select_card(uid, NULL, &cuid)) {
-                       if (OLD_MF_DBGLEVEL >= 1)       Dbprintf("Can't select card");
-                       break;
-               };
-
-               ui64Key = bytes_to_num(datain + i * 6, 6);
-               if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
-                       continue;
-               };
-               
-               isOK = 1;
-               break;
-       }
-       
-       //  ----------------------------- crypto1 destroy
-       crypto1_destroy(pcs);
-       
-       // add trace trailer
-       memset(uid, 0x44, 4);
-       LogTrace(uid, 4, 0, 0, TRUE);
-
-       UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
-       if (isOK) memcpy(ack.d.asBytes, datain + i * 6, 6);
-       
-       LED_B_ON();
-       UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
-       LED_B_OFF();
-
-  // Thats it...
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LEDsoff();
-
-       // restore debug level
-       MF_DBGLEVEL = OLD_MF_DBGLEVEL;  
-}
-
-//-----------------------------------------------------------------------------
-// MIFARE 1K simulate. 
-// 
-//-----------------------------------------------------------------------------
-void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
-{
-       int cardSTATE = MFEMUL_NOFIELD;
-       int vHf = 0;    // in mV
-       int nextCycleTimeout = 0;
-       int res;
-       uint32_t timer = 0;
-       uint32_t selTimer = 0;
-       uint32_t authTimer = 0;
-       uint32_t par = 0;
-       int len = 0;
-       uint8_t cardWRBL = 0;
-       uint8_t cardAUTHSC = 0;
-       uint8_t cardAUTHKEY = 0xff;  // no authentication
-       uint32_t cuid = 0;
-       struct Crypto1State mpcs = {0, 0};
-       struct Crypto1State *pcs;
-       pcs = &mpcs;
-       
-       uint64_t key64 = 0xffffffffffffULL;
-       
-       uint8_t* receivedCmd = eml_get_bigbufptr_recbuf();
-       uint8_t *response = eml_get_bigbufptr_sendbuf();
-       
-       static uint8_t rATQA[] = {0x04, 0x00}; // Mifare classic 1k
-
-       static uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; 
-       static uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!!
-               
-       static uint8_t rSAK[] = {0x08, 0xb6, 0xdd};
-
-       static uint8_t rAUTH_NT[] = {0x1a, 0xac, 0xff, 0x4f};
-       static uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
-       
-       // clear trace
-       traceLen = 0;
-       tracing = true;
-       
-       // emulator memory
-       emlClearMem();
-       emlGetMemBt(rUIDBCC1, 0, 4);
-       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
-       
-// --------------------------------------      test area
-
-   // Authenticate response - nonce
-    uint8_t *resp1 = (((uint8_t *)BigBuf) + EML_RESPONSES);
-    int resp1Len;
-//    uint8_t *resp2 = (((uint8_t *)BigBuf) + EML_RESPONSES + 200);
-//    int resp2Len;
-       CodeIso14443aAsTag(rAUTH_NT, sizeof(rAUTH_NT));
-    memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax;
-               
-       timer = GetTickCount();
-       uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
-       uint32_t rn_enc = 0x98d76b77; // !!!!!!!!!!!!!!!!!
-       uint32_t ans = 0;
-       cuid = bytes_to_num(rUIDBCC1, 4);
-/*     
-       crypto1_create(pcs, key64);
-  crypto1_word(pcs, cuid ^ nonce, 0);
-  crypto1_word(pcs, rn_enc , 1);
-  crypto1_word(pcs, 0, 0);
-  ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
-       num_to_bytes(ans, 4, rAUTH_AT);
-       CodeIso14443aAsTag(rAUTH_AT, sizeof(rAUTH_AT));
-  memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax;
-       Dbprintf("crypto auth time: %d", GetTickCount() - timer);
-*/
-// --------------------------------------      END test area
-       // start mkseconds counter
-       StartCountUS();
-
-       // We need to listen to the high-frequency, peak-detected path.
-       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
-       FpgaSetupSsc();
-
-  FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-       SpinDelay(200);
-
-       Dbprintf("--> start");
-       // calibrate mkseconds counter
-       GetDeltaCountUS();
-       while (true) {
-               WDT_HIT();
-
-               if(BUTTON_PRESS()) {
-                       break;
-               }
-
-               // find reader field
-               // Vref = 3300mV, and an 10:1 voltage divider on the input
-               // can measure voltages up to 33000 mV
-               if (cardSTATE == MFEMUL_NOFIELD) {
-                       vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10;
-                       if (vHf > MF_MINFIELDV) {
-                               cardSTATE = MFEMUL_IDLE;
-                               LED_A_ON();
-                       }
-               } 
-
-               if (cardSTATE != MFEMUL_NOFIELD) {
-                       res = EmGetCmd(receivedCmd, &len, 100); // (+ nextCycleTimeout)
-                       if (res == 2) {
-                               cardSTATE = MFEMUL_NOFIELD;
-                               LEDsoff();
-                               continue;
-                       }
-                       if(res) break;
-               }
-               
-               nextCycleTimeout = 0;
-               
-//             if (len) Dbprintf("len:%d cmd: %02x %02x %02x %02x", len, receivedCmd[0], receivedCmd[1], receivedCmd[2], receivedCmd[3]);
-
-               if (len != 4 && cardSTATE != MFEMUL_NOFIELD) { // len != 4 <---- speed up the code 4 authentication
-                       // REQ or WUP request in ANY state and WUP in HALTED state
-                       if (len == 1 && ((receivedCmd[0] == 0x26 && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == 0x52)) {
-                               selTimer = GetTickCount();
-                               EmSendCmdEx(rATQA, sizeof(rATQA), (receivedCmd[0] == 0x52));
-                               cardSTATE = MFEMUL_SELECT1;
+               if (len != 4 && cardSTATE != MFEMUL_NOFIELD) { // len != 4 <---- speed up the code 4 authentication
+                       // REQ or WUP request in ANY state and WUP in HALTED state
+                       if (len == 1 && ((receivedCmd[0] == 0x26 && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == 0x52)) {
+                               selTimer = GetTickCount();
+                               EmSendCmdEx(rATQA, sizeof(rATQA), (receivedCmd[0] == 0x52));
+                               cardSTATE = MFEMUL_SELECT1;
 
                                // init crypto block
                                LED_B_OFF();
 
                                // init crypto block
                                LED_B_OFF();
@@ -2714,86 +2062,133 @@ void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
                                // select all
                                if (len == 2 && (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x20)) {
                                        EmSendCmd(rUIDBCC1, sizeof(rUIDBCC1));
                                // select all
                                if (len == 2 && (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x20)) {
                                        EmSendCmd(rUIDBCC1, sizeof(rUIDBCC1));
-
-                                       if (rUIDBCC1[0] == 0x88) {
-                                               cardSTATE = MFEMUL_SELECT2;
-                                       }
+                                       break;
                                }
 
                                // select card
                                if (len == 9 && 
                                                (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) {
                                }
 
                                // select card
                                if (len == 9 && 
                                                (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) {
-                                       EmSendCmd(rSAK, sizeof(rSAK));
+                                       if (!_7BUID) 
+                                               EmSendCmd(rSAK, sizeof(rSAK));
+                                       else
+                                               EmSendCmd(rSAK1, sizeof(rSAK1));
 
                                        cuid = bytes_to_num(rUIDBCC1, 4);
 
                                        cuid = bytes_to_num(rUIDBCC1, 4);
-                                       cardSTATE = MFEMUL_WORK;
-                                       LED_B_ON();
-                                       Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer);
+                                       if (!_7BUID) {
+                                               cardSTATE = MFEMUL_WORK;
+                                               LED_B_ON();
+                                               if (MF_DBGLEVEL >= 4)   Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer);
+                                               break;
+                                       } else {
+                                               cardSTATE = MFEMUL_SELECT2;
+                                               break;
+                                       }
                                }
                                
                                break;
                        }
                        case MFEMUL_SELECT2:{
                                }
                                
                                break;
                        }
                        case MFEMUL_SELECT2:{
+                               if (!len) break;
+                       
+                               if (len == 2 && (receivedCmd[0] == 0x95 && receivedCmd[1] == 0x20)) {
                                        EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2));
                                        EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2));
+                                       break;
+                               }
+
+                               // select 2 card
+                               if (len == 9 && 
+                                               (receivedCmd[0] == 0x95 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0)) {
+                                       EmSendCmd(rSAK, sizeof(rSAK));
 
 
-                               cuid = bytes_to_num(rUIDBCC2, 4);
+                                       cuid = bytes_to_num(rUIDBCC2, 4);
+                                       cardSTATE = MFEMUL_WORK;
+                                       LED_B_ON();
+                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer);
+                                       break;
+                               }
+                               
+                               // i guess there is a command). go into the work state.
+                               if (len != 4) break;
                                cardSTATE = MFEMUL_WORK;
                                cardSTATE = MFEMUL_WORK;
-                               LED_B_ON();
-Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer);
-                               break;
+                               goto lbWORK;
                        }
                        case MFEMUL_AUTH1:{
                                if (len == 8) {
                        }
                        case MFEMUL_AUTH1:{
                                if (len == 8) {
-// ---------------------------------
-       rn_enc = bytes_to_num(receivedCmd, 4);
-       crypto1_create(pcs, key64);
-  crypto1_word(pcs, cuid ^ nonce, 0);
-  crypto1_word(pcs, rn_enc , 1);
-  crypto1_word(pcs, 0, 0);
-  ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
-       num_to_bytes(ans, 4, rAUTH_AT);
-// ---------------------------------
-                               EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
+                                       // --- crypto
+                                       //rn_enc = bytes_to_num(receivedCmd, 4);
+                                       //cardRn = rn_enc ^ crypto1_word(pcs, rn_enc , 1);
+                                       cardRr = bytes_to_num(&receivedCmd[4], 4) ^ crypto1_word(pcs, 0, 0);
+                                       // test if auth OK
+                                       if (cardRr != prng_successor(nonce, 64)){
+                                               if (MF_DBGLEVEL >= 4)   Dbprintf("AUTH FAILED. cardRr=%08x, succ=%08x", cardRr, prng_successor(nonce, 64));
+                                               cardSTATE_TO_IDLE();
+                                               break;
+                                       }
+                                       ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
+                                       num_to_bytes(ans, 4, rAUTH_AT);
+                                       // --- crypto
+                                       EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
                                        cardSTATE = MFEMUL_AUTH2;
                                } else {
                                        cardSTATE = MFEMUL_AUTH2;
                                } else {
-                                       cardSTATE = MFEMUL_IDLE;
-                                       LED_B_OFF();
-                                       LED_C_OFF();
+                                       cardSTATE_TO_IDLE();
                                }
                                if (cardSTATE != MFEMUL_AUTH2) break;
                        }
                        case MFEMUL_AUTH2:{
                                }
                                if (cardSTATE != MFEMUL_AUTH2) break;
                        }
                        case MFEMUL_AUTH2:{
-                               // test auth info here...
-
                                LED_C_ON();
                                cardSTATE = MFEMUL_WORK;
                                LED_C_ON();
                                cardSTATE = MFEMUL_WORK;
-Dbprintf("AUTH COMPLETED. sec=%d, key=%d time=%d", cardAUTHSC, cardAUTHKEY, GetTickCount() - authTimer);
+                               if (MF_DBGLEVEL >= 4)   Dbprintf("AUTH COMPLETED. sec=%d, key=%d time=%d", cardAUTHSC, cardAUTHKEY, GetTickCount() - authTimer);
                                break;
                        }
                        case MFEMUL_WORK:{
                                break;
                        }
                        case MFEMUL_WORK:{
-                               // auth
-                               if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
-authTimer = GetTickCount();
-//                                     EmSendCmd(rAUTH_NT, sizeof(rAUTH_NT));
-                                       EmSendCmd14443aRaw(resp1, resp1Len, 0);
-LogTrace(NULL, 0, GetDeltaCountUS(), 0, TRUE);
-//                                     crypto1_create(pcs, key64);
-//                                     if (cardAUTHKEY == 0xff) { // first auth
-//                                     crypto1_word(pcs, cuid ^ bytes_to_num(rAUTH_NT, 4), 0); // uid ^ nonce
-//                                     } else { // nested auth
-//                                     }
-
-                                       cardAUTHSC = receivedCmd[1] / 4;  // received block num
-                                       cardAUTHKEY = receivedCmd[0] - 0x60;
-                                       cardSTATE = MFEMUL_AUTH1;
-                                       nextCycleTimeout = 10;
-                                       break;
-                               }
+lbWORK:        if (len == 0) break;
                                
                                
-                               if (len == 0) break;
-                               
-                               // decrypt seqence
-                               if (cardAUTHKEY != 0xff) mf_crypto1_decrypt(pcs, receivedCmd, len);
+                               if (cardAUTHKEY == 0xff) {
+                                       // first authentication
+                                       if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
+                                               authTimer = GetTickCount();
+
+                                               cardAUTHSC = receivedCmd[1] / 4;  // received block num
+                                               cardAUTHKEY = receivedCmd[0] - 0x60;
+
+                                               // --- crypto
+                                               crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
+                                               ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); 
+                                               num_to_bytes(nonce, 4, rAUTH_AT);
+                                               EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
+                                               // --- crypto
+                                               
+//   last working revision 
+//                                             EmSendCmd14443aRaw(resp1, resp1Len, 0);
+//                                             LogTrace(NULL, 0, GetDeltaCountUS(), 0, true);
+
+                                               cardSTATE = MFEMUL_AUTH1;
+                                               //nextCycleTimeout = 10;
+                                               break;
+                                       }
+                               } else {
+                                       // decrypt seqence
+                                       mf_crypto1_decrypt(pcs, receivedCmd, len);
+                                       
+                                       // nested authentication
+                                       if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
+                                               authTimer = GetTickCount();
+
+                                               cardAUTHSC = receivedCmd[1] / 4;  // received block num
+                                               cardAUTHKEY = receivedCmd[0] - 0x60;
+
+                                               // --- crypto
+                                               crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
+                                               ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); 
+                                               num_to_bytes(ans, 4, rAUTH_AT);
+                                               EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
+                                               // --- crypto
+
+                                               cardSTATE = MFEMUL_AUTH1;
+                                               //nextCycleTimeout = 10;
+                                               break;
+                                       }
+                               }
                                
                                // rule 13 of 7.5.3. in ISO 14443-4. chaining shall be continued
                                // BUT... ACK --> NACK
                                
                                // rule 13 of 7.5.3. in ISO 14443-4. chaining shall be continued
                                // BUT... ACK --> NACK
@@ -2810,7 +2205,7 @@ LogTrace(NULL, 0, GetDeltaCountUS(), 0, TRUE);
                                
                                // read block
                                if (len == 4 && receivedCmd[0] == 0x30) {
                                
                                // read block
                                if (len == 4 && receivedCmd[0] == 0x30) {
-                                       if (receivedCmd[1] >= 16 * 4) {
+                                       if (receivedCmd[1] >= 16 * 4 || receivedCmd[1] / 4 != cardAUTHSC) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                                break;
                                        }
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                                break;
                                        }
@@ -2823,32 +2218,72 @@ LogTrace(NULL, 0, GetDeltaCountUS(), 0, TRUE);
                                
                                // write block
                                if (len == 4 && receivedCmd[0] == 0xA0) {
                                
                                // write block
                                if (len == 4 && receivedCmd[0] == 0xA0) {
-                                       if (receivedCmd[1] >= 16 * 4) {
+                                       if (receivedCmd[1] >= 16 * 4 || receivedCmd[1] / 4 != cardAUTHSC) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                                break;
                                        }
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                                break;
                                        }
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       nextCycleTimeout = 50;
+                                       //nextCycleTimeout = 50;
                                        cardSTATE = MFEMUL_WRITEBL2;
                                        cardWRBL = receivedCmd[1];
                                        break;
                                }
                        
                                        cardSTATE = MFEMUL_WRITEBL2;
                                        cardWRBL = receivedCmd[1];
                                        break;
                                }
                        
+                               // works with cardINTREG
+                               
+                               // increment, decrement, restore
+                               if (len == 4 && (receivedCmd[0] == 0xC0 || receivedCmd[0] == 0xC1 || receivedCmd[0] == 0xC2)) {
+                                       if (receivedCmd[1] >= 16 * 4 || 
+                                                       receivedCmd[1] / 4 != cardAUTHSC || 
+                                                       emlCheckValBl(receivedCmd[1])) {
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                               break;
+                                       }
+                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+                                       if (receivedCmd[0] == 0xC1)
+                                               cardSTATE = MFEMUL_INTREG_INC;
+                                       if (receivedCmd[0] == 0xC0)
+                                               cardSTATE = MFEMUL_INTREG_DEC;
+                                       if (receivedCmd[0] == 0xC2)
+                                               cardSTATE = MFEMUL_INTREG_REST;
+                                       cardWRBL = receivedCmd[1];
+                                       
+                                       break;
+                               }
+                               
+
+                               // transfer
+                               if (len == 4 && receivedCmd[0] == 0xB0) {
+                                       if (receivedCmd[1] >= 16 * 4 || receivedCmd[1] / 4 != cardAUTHSC) {
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                               break;
+                                       }
+                                       
+                                       if (emlSetValBl(cardINTREG, cardINTBLOCK, receivedCmd[1]))
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                       else
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+                                               
+                                       break;
+                               }
+
                                // halt
                                if (len == 4 && (receivedCmd[0] == 0x50 && receivedCmd[1] == 0x00)) {
                                // halt
                                if (len == 4 && (receivedCmd[0] == 0x50 && receivedCmd[1] == 0x00)) {
-                                       cardSTATE = MFEMUL_HALTED;
                                        LED_B_OFF();
                                        LED_C_OFF();
                                        LED_B_OFF();
                                        LED_C_OFF();
-                                       Dbprintf("--> HALTED. Selected time: %d ms",  GetTickCount() - selTimer);
+                                       cardSTATE = MFEMUL_HALTED;
+                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> HALTED. Selected time: %d ms",  GetTickCount() - selTimer);
                                        break;
                                }
                                        break;
                                }
-                               break;
-
+                               
                                // command not allowed
                                if (len == 4) {
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                        break;
                                }
                                // command not allowed
                                if (len == 4) {
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                        break;
                                }
+
+                               // case break
+                               break;
                        }
                        case MFEMUL_WRITEBL2:{
                                if (len == 18){
                        }
                        case MFEMUL_WRITEBL2:{
                                if (len == 18){
@@ -2857,13 +2292,49 @@ LogTrace(NULL, 0, GetDeltaCountUS(), 0, TRUE);
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
                                        cardSTATE = MFEMUL_WORK;
                                        break;
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
                                        cardSTATE = MFEMUL_WORK;
                                        break;
+                               } else {
+                                       cardSTATE_TO_IDLE();
+                                       break;
                                }
                                }
-Dbprintf("err write block: %d len:%d", cardWRBL, len);
                                break;
                        }
                                break;
                        }
-               
+                       
+                       case MFEMUL_INTREG_INC:{
+                               mf_crypto1_decrypt(pcs, receivedCmd, len);
+                               memcpy(&ans, receivedCmd, 4);
+                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
+                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                       cardSTATE_TO_IDLE();
+                                       break;
+                               }
+                               cardINTREG = cardINTREG + ans;
+                               cardSTATE = MFEMUL_WORK;
+                               break;
+                       }
+                       case MFEMUL_INTREG_DEC:{
+                               mf_crypto1_decrypt(pcs, receivedCmd, len);
+                               memcpy(&ans, receivedCmd, 4);
+                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
+                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                       cardSTATE_TO_IDLE();
+                                       break;
+                               }
+                               cardINTREG = cardINTREG - ans;
+                               cardSTATE = MFEMUL_WORK;
+                               break;
+                       }
+                       case MFEMUL_INTREG_REST:{
+                               mf_crypto1_decrypt(pcs, receivedCmd, len);
+                               memcpy(&ans, receivedCmd, 4);
+                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
+                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                       cardSTATE_TO_IDLE();
+                                       break;
+                               }
+                               cardSTATE = MFEMUL_WORK;
+                               break;
+                       }
                }
                }
-       
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
@@ -2873,5 +2344,153 @@ Dbprintf("err write block: %d len:%d", cardWRBL, len);
        memset(rAUTH_NT, 0x44, 4);
        LogTrace(rAUTH_NT, 4, 0, 0, TRUE);
 
        memset(rAUTH_NT, 0x44, 4);
        LogTrace(rAUTH_NT, 4, 0, 0, TRUE);
 
-       DbpString("Emulator stopped.");
+       if (MF_DBGLEVEL >= 1)   Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ",    tracing, traceLen);
 }
 }
+
+//-----------------------------------------------------------------------------
+// MIFARE sniffer. 
+// 
+//-----------------------------------------------------------------------------
+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;
+       memset(trace, 0x44, TRACE_SIZE);
+
+       // The command (reader -> tag) that we're receiving.
+       // The length of a received command will in most cases be no more than 18 bytes.
+       // So 32 should be enough!
+       uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       // The response (tag -> reader) that we're receiving.
+       uint8_t *receivedResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
+
+       // As we receive stuff, we copy it from receivedCmd or receivedResponse
+       // into trace, along with its length and other annotations.
+       //uint8_t *trace = (uint8_t *)BigBuf;
+       
+       // The DMA buffer, used to stream samples from the FPGA
+       int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET;
+       int8_t *data = dmaBuf;
+       int maxDataLen = 0;
+       int dataLen = 0;
+
+       // Set up the demodulator for tag -> reader responses.
+       Demod.output = receivedResponse;
+       Demod.len = 0;
+       Demod.state = DEMOD_UNSYNCD;
+
+       // Set up the demodulator for the reader -> tag commands
+       memset(&Uart, 0, sizeof(Uart));
+       Uart.output = receivedCmd;
+       Uart.byteCntMax = 32; // was 100 (greg)//////////////////
+       Uart.state = STATE_UNSYNCD;
+
+       // Setup for the DMA.
+       FpgaSetupSsc();
+       FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
+
+       // And put the FPGA in the appropriate mode
+       // Signal field is off with the appropriate LED
+       LED_D_OFF();
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER);
+       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+       
+       // init sniffer
+       MfSniffInit();
+       int sniffCounter = 0;
+
+       // And now we loop, receiving samples.
+       while(true) {
+               if(BUTTON_PRESS()) {
+                       DbpString("cancelled by button");
+                       goto done;
+               }
+
+               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;
+               if (readBufDataP <= dmaBufDataP){
+                       dataLen = dmaBufDataP - readBufDataP;
+               } else {
+                       dataLen = DMA_BUFFER_SIZE - readBufDataP + dmaBufDataP + 1;
+               }
+               // test for length of buffer
+               if(dataLen > maxDataLen) {
+                       maxDataLen = dataLen;
+                       if(dataLen > 400) {
+                               Dbprintf("blew circular buffer! dataLen=0x%x", dataLen);
+                               goto done;
+                       }
+               }
+               if(dataLen < 1) continue;
+
+               // primary buffer was stopped( <-- we lost data!
+               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) {
+                       AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf;
+                       AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
+               }
+
+               LED_A_OFF();
+               
+               if(MillerDecoding((data[0] & 0xF0) >> 4)) {
+                       LED_C_INV();
+                       // check - if there is a short 7bit request from reader
+                       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 */
+                       Demod.state = DEMOD_UNSYNCD;
+               }
+
+               if(ManchesterDecoding(data[0] & 0x0F)) {
+                       LED_C_INV();
+
+                       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;
+
+                       /* And also reset the uart code */
+                       Uart.state = STATE_UNSYNCD;
+               }
+
+               data++;
+               if(data > dmaBuf + DMA_BUFFER_SIZE) {
+                       data = dmaBuf;
+               }
+       } // main cycle
+
+       DbpString("COMMAND FINISHED");
+
+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.byteCntMax, traceLen);
+       LEDsoff();
+}
\ No newline at end of file
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