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Merge branch 'master' of https://github.com/Proxmark/proxmark3
[proxmark3-svn] / armsrc / iclass.c
diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index b14a0db5080738749f6d3145d2d8d80ded0977b6..67130804910a13428772e31189182d3874d1c7af 100644 (file)
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -36,7 +36,7 @@
 //
 //-----------------------------------------------------------------------------
 
 //
 //-----------------------------------------------------------------------------
 
-#include "proxmark3.h"
+#include "../include/proxmark3.h"
 #include "apps.h"
 #include "util.h"
 #include "string.h"
 #include "apps.h"
 #include "util.h"
 #include "string.h"
@@ -45,8 +45,10 @@
 // Needed for CRC in emulation mode;
 // same construction as in ISO 14443;
 // different initial value (CRC_ICLASS)
 // Needed for CRC in emulation mode;
 // same construction as in ISO 14443;
 // different initial value (CRC_ICLASS)
-#include "iso14443crc.h"
-#include "iso15693tools.h"
+#include "../common/iso14443crc.h"
+#include "../common/iso15693tools.h"
+//#include "iso15693tools.h"
+
 
 static int timeout = 4096;
 
 
 static int timeout = 4096;
 
@@ -71,14 +73,13 @@ static struct {
     int     nOutOfCnt;
     int     OutOfCnt;
     int     syncBit;
     int     nOutOfCnt;
     int     OutOfCnt;
     int     syncBit;
-    int     parityBits;
     int     samples;
     int     highCnt;
     int     swapper;
     int     counter;
     int     bitBuffer;
     int     dropPosition;
     int     samples;
     int     highCnt;
     int     swapper;
     int     counter;
     int     bitBuffer;
     int     dropPosition;
-    uint8_t   *output;
+    uint8_t *output;
 } Uart;
 
 static RAMFUNC int OutOfNDecoding(int bit)
 } Uart;
 
 static RAMFUNC int OutOfNDecoding(int bit)
@@ -137,11 +138,8 @@ static RAMFUNC int OutOfNDecoding(int bit)
                                        if(Uart.byteCnt == 0) {
                                                // Its not straightforward to show single EOFs
                                                // So just leave it and do not return TRUE
                                        if(Uart.byteCnt == 0) {
                                                // Its not straightforward to show single EOFs
                                                // So just leave it and do not return TRUE
-                                               Uart.output[Uart.byteCnt] = 0xf0;
+                                               Uart.output[0] = 0xf0;
                                                Uart.byteCnt++;
                                                Uart.byteCnt++;
-
-                                               // Calculate the parity bit for the client...
-                                               Uart.parityBits = 1;
                                        }
                                        else {
                                                return TRUE;
                                        }
                                        else {
                                                return TRUE;
@@ -223,11 +221,6 @@ static RAMFUNC int OutOfNDecoding(int bit)
                                                if(Uart.bitCnt == 8) {
                                                        Uart.output[Uart.byteCnt] = (Uart.shiftReg & 0xff);
                                                        Uart.byteCnt++;
                                                if(Uart.bitCnt == 8) {
                                                        Uart.output[Uart.byteCnt] = (Uart.shiftReg & 0xff);
                                                        Uart.byteCnt++;
-
-                                                       // Calculate the parity bit for the client...
-                                                       Uart.parityBits <<= 1;
-                                                       Uart.parityBits ^= OddByteParity[(Uart.shiftReg & 0xff)];
-
                                                        Uart.bitCnt = 0;
                                                        Uart.shiftReg = 0;
                                                }
                                                        Uart.bitCnt = 0;
                                                        Uart.shiftReg = 0;
                                                }
@@ -246,11 +239,6 @@ static RAMFUNC int OutOfNDecoding(int bit)
                                        Uart.dropPosition--;
                                        Uart.output[Uart.byteCnt] = (Uart.dropPosition & 0xff);
                                        Uart.byteCnt++;
                                        Uart.dropPosition--;
                                        Uart.output[Uart.byteCnt] = (Uart.dropPosition & 0xff);
                                        Uart.byteCnt++;
-
-                                       // Calculate the parity bit for the client...
-                                       Uart.parityBits <<= 1;
-                                       Uart.parityBits ^= OddByteParity[(Uart.dropPosition & 0xff)];
-
                                        Uart.bitCnt = 0;
                                        Uart.shiftReg = 0;
                                        Uart.nOutOfCnt = 0;
                                        Uart.bitCnt = 0;
                                        Uart.shiftReg = 0;
                                        Uart.nOutOfCnt = 0;
@@ -311,7 +299,6 @@ static RAMFUNC int OutOfNDecoding(int bit)
                                Uart.state = STATE_START_OF_COMMUNICATION;
                                Uart.bitCnt = 0;
                                Uart.byteCnt = 0;
                                Uart.state = STATE_START_OF_COMMUNICATION;
                                Uart.bitCnt = 0;
                                Uart.byteCnt = 0;
-                               Uart.parityBits = 0;
                                Uart.nOutOfCnt = 0;
                                Uart.OutOfCnt = 4; // Start at 1/4, could switch to 1/256
                                Uart.dropPosition = 0;
                                Uart.nOutOfCnt = 0;
                                Uart.OutOfCnt = 4; // Start at 1/4, could switch to 1/256
                                Uart.dropPosition = 0;
@@ -353,7 +340,6 @@ static struct {
     int     bitCount;
     int     posCount;
        int     syncBit;
     int     bitCount;
     int     posCount;
        int     syncBit;
-       int     parityBits;
     uint16_t    shiftReg;
        int     buffer;
        int     buffer2;
     uint16_t    shiftReg;
        int     buffer;
        int     buffer2;
@@ -420,7 +406,6 @@ static RAMFUNC int ManchesterDecoding(int v)
                        Demod.sub = SUB_FIRST_HALF;
                        Demod.bitCount = 0;
                        Demod.shiftReg = 0;
                        Demod.sub = SUB_FIRST_HALF;
                        Demod.bitCount = 0;
                        Demod.shiftReg = 0;
-                       Demod.parityBits = 0;
                        Demod.samples = 0;
                        if(Demod.posCount) {
                                //if(trigger) LED_A_OFF();  // Not useful in this case...
                        Demod.samples = 0;
                        if(Demod.posCount) {
                                //if(trigger) LED_A_OFF();  // Not useful in this case...
@@ -450,7 +435,6 @@ static RAMFUNC int ManchesterDecoding(int v)
        else {
                modulation = bit & Demod.syncBit;
                modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
        else {
                modulation = bit & Demod.syncBit;
                modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
-               //modulation = ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
 
                Demod.samples += 4;
 
 
                Demod.samples += 4;
 
@@ -485,8 +469,6 @@ static RAMFUNC int ManchesterDecoding(int v)
                                if(Demod.state == DEMOD_SOF_COMPLETE) {
                                        Demod.output[Demod.len] = 0x0f;
                                        Demod.len++;
                                if(Demod.state == DEMOD_SOF_COMPLETE) {
                                        Demod.output[Demod.len] = 0x0f;
                                        Demod.len++;
-                                       Demod.parityBits <<= 1;
-                                       Demod.parityBits ^= OddByteParity[0x0f];
                                        Demod.state = DEMOD_UNSYNCD;
 //                                     error = 0x0f;
                                        return TRUE;
                                        Demod.state = DEMOD_UNSYNCD;
 //                                     error = 0x0f;
                                        return TRUE;
@@ -567,11 +549,9 @@ static RAMFUNC int ManchesterDecoding(int v)
                                        // Tag response does not need to be a complete byte!
                                        if(Demod.len > 0 || Demod.bitCount > 0) {
                                                if(Demod.bitCount > 1) {  // was > 0, do not interpret last closing bit, is part of EOF
                                        // Tag response does not need to be a complete byte!
                                        if(Demod.len > 0 || Demod.bitCount > 0) {
                                                if(Demod.bitCount > 1) {  // was > 0, do not interpret last closing bit, is part of EOF
-                                                       Demod.shiftReg >>= (9 - Demod.bitCount);
+                                                       Demod.shiftReg >>= (9 - Demod.bitCount);        // right align data
                                                        Demod.output[Demod.len] = Demod.shiftReg & 0xff;
                                                        Demod.len++;
                                                        Demod.output[Demod.len] = Demod.shiftReg & 0xff;
                                                        Demod.len++;
-                                                       // No parity bit, so just shift a 0
-                                                       Demod.parityBits <<= 1;
                                                }
 
                                                Demod.state = DEMOD_UNSYNCD;
                                                }
 
                                                Demod.state = DEMOD_UNSYNCD;
@@ -608,11 +588,6 @@ static RAMFUNC int ManchesterDecoding(int v)
                                Demod.shiftReg >>= 1;
                                Demod.output[Demod.len] = (Demod.shiftReg & 0xff);
                                Demod.len++;
                                Demod.shiftReg >>= 1;
                                Demod.output[Demod.len] = (Demod.shiftReg & 0xff);
                                Demod.len++;
-
-                               // FOR ISO15639 PARITY NOT SEND OTA, JUST CALCULATE IT FOR THE CLIENT
-                               Demod.parityBits <<= 1;
-                               Demod.parityBits ^= OddByteParity[(Demod.shiftReg & 0xff)];
-
                                Demod.bitCount = 0;
                                Demod.shiftReg = 0;
                        }
                                Demod.bitCount = 0;
                                Demod.shiftReg = 0;
                        }
@@ -667,21 +642,24 @@ void RAMFUNC SnoopIClass(void)
     // 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 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 *readerToTagCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       #define ICLASS_BUFFER_SIZE 32
+       uint8_t readerToTagCmd[ICLASS_BUFFER_SIZE];
     // The response (tag -> reader) that we're receiving.
     // The response (tag -> reader) that we're receiving.
-       uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
-
+       uint8_t tagToReaderResponse[ICLASS_BUFFER_SIZE];
+       
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
  
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
  
-    // reset traceLen to 0
-    iso14a_set_tracing(TRUE);
-    iso14a_clear_trace();
+       // free all BigBuf memory
+       BigBuf_free();
+    // The DMA buffer, used to stream samples from the FPGA
+    uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
+ 
+       set_tracing(TRUE);
+       clear_trace();
     iso14a_set_trigger(FALSE);
 
     iso14a_set_trigger(FALSE);
 
-    // The DMA buffer, used to stream samples from the FPGA
-    int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET;
     int lastRxCounter;
     int lastRxCounter;
-    int8_t *upTo;
+    uint8_t *upTo;
     int smpl;
     int maxBehindBy = 0;
 
     int smpl;
     int maxBehindBy = 0;
 
@@ -714,7 +692,8 @@ void RAMFUNC SnoopIClass(void)
     SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
        uint32_t time_0 = GetCountSspClk();
     SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
        uint32_t time_0 = GetCountSspClk();
-
+       uint32_t time_start = 0;
+       uint32_t time_stop  = 0;
 
     int div = 0;
     //int div2 = 0;
 
     int div = 0;
     //int div2 = 0;
@@ -729,7 +708,7 @@ void RAMFUNC SnoopIClass(void)
                                 (DMA_BUFFER_SIZE-1);
         if(behindBy > maxBehindBy) {
             maxBehindBy = behindBy;
                                 (DMA_BUFFER_SIZE-1);
         if(behindBy > maxBehindBy) {
             maxBehindBy = behindBy;
-            if(behindBy > 400) {
+            if(behindBy > (9 * DMA_BUFFER_SIZE / 10)) {
                 Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
                 goto done;
             }
                 Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
                 goto done;
             }
@@ -765,14 +744,15 @@ void RAMFUNC SnoopIClass(void)
                smpl = decbyter;        
                if(OutOfNDecoding((smpl & 0xF0) >> 4)) {
                    rsamples = samples - Uart.samples;
                smpl = decbyter;        
                if(OutOfNDecoding((smpl & 0xF0) >> 4)) {
                    rsamples = samples - Uart.samples;
+                       time_stop = (GetCountSspClk()-time_0) << 4;
                    LED_C_ON();
 
                        //if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,TRUE)) break;
                        //if(!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, TRUE)) break;
                    LED_C_ON();
 
                        //if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,TRUE)) break;
                        //if(!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, TRUE)) break;
-                       if(tracing)
-                       {
-                               LogTrace(Uart.output,Uart.byteCnt, (GetCountSspClk()-time_0) << 4, Uart.parityBits,TRUE);
-                               LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, TRUE);
+                       if(tracing)     {
+                               uint8_t parity[MAX_PARITY_SIZE];
+                               GetParity(Uart.output, Uart.byteCnt, parity);
+                               LogTrace(Uart.output,Uart.byteCnt, time_start, time_stop, parity, TRUE);
                        }
 
 
                        }
 
 
@@ -783,6 +763,8 @@ void RAMFUNC SnoopIClass(void)
                    Demod.state = DEMOD_UNSYNCD;
                    LED_B_OFF();
                    Uart.byteCnt = 0;
                    Demod.state = DEMOD_UNSYNCD;
                    LED_B_OFF();
                    Uart.byteCnt = 0;
+               }else{
+                       time_start = (GetCountSspClk()-time_0) << 4;
                }
                decbyter = 0;
        }
                }
                decbyter = 0;
        }
@@ -790,21 +772,24 @@ void RAMFUNC SnoopIClass(void)
        if(div > 3) {
                smpl = decbyte;
                if(ManchesterDecoding(smpl & 0x0F)) {
        if(div > 3) {
                smpl = decbyte;
                if(ManchesterDecoding(smpl & 0x0F)) {
+                       time_stop = (GetCountSspClk()-time_0) << 4;
+
                    rsamples = samples - Demod.samples;
                    LED_B_ON();
 
                    rsamples = samples - Demod.samples;
                    LED_B_ON();
 
-                       if(tracing)
-                       {
-                               LogTrace(Demod.output,Demod.len, (GetCountSspClk()-time_0) << 4 , Demod.parityBits,FALSE);
-                               LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, FALSE);
+                       if(tracing)     {
+                               uint8_t parity[MAX_PARITY_SIZE];
+                               GetParity(Demod.output, Demod.len, parity);
+                               LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, FALSE);
                        }
 
                        }
 
-
                    // And ready to receive another response.
                    memset(&Demod, 0, sizeof(Demod));
                        Demod.output = tagToReaderResponse;
                    Demod.state = DEMOD_UNSYNCD;
                    LED_C_OFF();
                    // And ready to receive another response.
                    memset(&Demod, 0, sizeof(Demod));
                        Demod.output = tagToReaderResponse;
                    Demod.state = DEMOD_UNSYNCD;
                    LED_C_OFF();
+               }else{
+                       time_start = (GetCountSspClk()-time_0) << 4;
                }
                
                div = 0;
                }
                
                div = 0;
@@ -821,12 +806,12 @@ void RAMFUNC SnoopIClass(void)
     DbpString("COMMAND FINISHED");
 
     Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
     DbpString("COMMAND FINISHED");
 
     Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
-    Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
+       Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]);
 
 done:
     AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
     Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
 
 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]);
+       Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]);
     LED_A_OFF();
     LED_B_OFF();
     LED_C_OFF();
     LED_A_OFF();
     LED_B_OFF();
     LED_C_OFF();
@@ -868,10 +853,7 @@ static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
         }
         if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
             uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
         }
         if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
             uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       /*if(OutOfNDecoding((b & 0xf0) >> 4)) {
-                               *len = Uart.byteCnt;
-                               return TRUE;
-                       }*/
+
                        if(OutOfNDecoding(b & 0x0f)) {
                                *len = Uart.byteCnt;
                                return TRUE;
                        if(OutOfNDecoding(b & 0x0f)) {
                                *len = Uart.byteCnt;
                                return TRUE;
@@ -880,57 +862,93 @@ static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
     }
 }
 
     }
 }
 
+static uint8_t encode4Bits(const uint8_t b)
+{
+       uint8_t c = b & 0xF;
+       // OTA, the least significant bits first
+       //         The columns are
+       //               1 - Bit value to send
+       //               2 - Reversed (big-endian)
+       //               3 - Encoded
+       //               4 - Hex values
+
+       switch(c){
+       //                          1       2         3         4
+         case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55
+         case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95
+         case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65
+         case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5
+         case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59
+         case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99
+         case 9:  return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69
+         case 8:  return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9
+         case 7:  return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56
+         case 6:  return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96
+         case 5:  return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66
+         case 4:  return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6
+         case 3:  return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a
+         case 2:  return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a
+         case 1:  return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a
+         default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa
+
+       }
+}
 
 //-----------------------------------------------------------------------------
 // Prepare tag messages
 //-----------------------------------------------------------------------------
 static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
 {
 
 //-----------------------------------------------------------------------------
 // Prepare tag messages
 //-----------------------------------------------------------------------------
 static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
 {
-       //So far a dummy implementation, not used
-       //int lastProxToAirDuration =0;
+
+       /*
+        * SOF comprises 3 parts;
+        * * An unmodulated time of 56.64 us
+        * * 24 pulses of 423.75 KHz (fc/32)
+        * * A logic 1, which starts with an unmodulated time of 18.88us
+        *   followed by 8 pulses of 423.75kHz (fc/32)
+        *
+        *
+        * EOF comprises 3 parts:
+        * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated
+        *   time of 18.88us.
+        * - 24 pulses of fc/32
+        * - An unmodulated time of 56.64 us
+        *
+        *
+        * A logic 0 starts with 8 pulses of fc/32
+        * followed by an unmodulated time of 256/fc (~18,88us).
+        *
+        * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by
+        * 8 pulses of fc/32 (also 18.88us)
+        *
+        * The mode FPGA_HF_SIMULATOR_MODULATE_424K_8BIT which we use to simulate tag,
+        * works like this.
+        * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us).
+        * - A 0-bit inptu to the FPGA becomes an unmodulated time of 18.88us
+        *
+        * In this mode the SOF can be written as 00011101 = 0x1D
+        * The EOF can be written as 10111000 = 0xb8
+        * A logic 1 is 01
+        * A logic 0 is 10
+        *
+        * */
+
        int i;
 
        ToSendReset();
 
        // Send SOF
        int i;
 
        ToSendReset();
 
        // Send SOF
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;//Proxtoair duration starts here
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;
+       ToSend[++ToSendMax] = 0x1D;
 
        for(i = 0; i < len; i++) {
 
        for(i = 0; i < len; i++) {
-               int j;
                uint8_t b = cmd[i];
                uint8_t b = cmd[i];
-
-               // Data bits
-               for(j = 0; j < 8; j++) {
-                       if(b & 1) {
-                               ToSend[++ToSendMax] = 0x00;
-                               ToSend[++ToSendMax] = 0xff;
-                       } else {
-                               ToSend[++ToSendMax] = 0xff;
-                               ToSend[++ToSendMax] = 0x00;
+               ToSend[++ToSendMax] = encode4Bits(b & 0xF); //Least significant half
+               ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF);//Most significant half
                        }
                        }
-                       b >>= 1;
-               }
-       }
 
        // Send EOF
 
        // Send EOF
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;     
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-
+       ToSend[++ToSendMax] = 0xB8;
        //lastProxToAirDuration  = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end
        //lastProxToAirDuration  = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end
-
        // Convert from last byte pos to length
        ToSendMax++;
 }
        // Convert from last byte pos to length
        ToSendMax++;
 }
@@ -943,21 +961,13 @@ static void CodeIClassTagSOF()
 
        ToSendReset();
        // Send SOF
 
        ToSendReset();
        // Send SOF
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;
-
+       ToSend[++ToSendMax] = 0x1D;
 //     lastProxToAirDuration  = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
 
 //     lastProxToAirDuration  = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
 
-       
        // Convert from last byte pos to length
        ToSendMax++;
 }
        // Convert from last byte pos to length
        ToSendMax++;
 }
+
 int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
 /**
  * @brief SimulateIClass simulates an iClass card.
 int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
 /**
  * @brief SimulateIClass simulates an iClass card.
@@ -978,8 +988,8 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
        // Enable and clear the trace
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
        // Enable and clear the trace
-       iso14a_set_tracing(TRUE);
-       iso14a_clear_trace();
+       set_tracing(TRUE);
+       clear_trace();
 
        uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
        if(simType == 0) {
 
        uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
        if(simType == 0) {
@@ -993,8 +1003,8 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
        else if(simType == 2)
        {
 
        else if(simType == 2)
        {
 
-               uint8_t mac_responses[64] = { 0 };
-               Dbprintf("Going into attack mode");
+               uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 };
+               Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS);
                // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
                // in order to collect MAC's from the reader. This can later be used in an offlne-attack
                // in order to obtain the keys, as in the "dismantling iclass"-paper.
                // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
                // in order to collect MAC's from the reader. This can later be used in an offlne-attack
                // in order to obtain the keys, as in the "dismantling iclass"-paper.
@@ -1004,8 +1014,9 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
                        // The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
 
                        memcpy(csn_crc, datain+(i*8), 8);
                        // The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
 
                        memcpy(csn_crc, datain+(i*8), 8);
-                       if(doIClassSimulation(csn_crc,1,mac_responses))
+                       if(doIClassSimulation(csn_crc,1,mac_responses+i*8))
                        {
                        {
+                               cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
                                return; // Button pressed
                        }
                }
                                return; // Button pressed
                        }
                }
@@ -1028,8 +1039,8 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
 int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf)
 {
 
 int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf)
 {
 
-
        // CSN followed by two CRC bytes
        // CSN followed by two CRC bytes
+       uint8_t response1[] = { 0x0F} ;
        uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
        memcpy(response3,csn,sizeof(response3));
        uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
        memcpy(response3,csn,sizeof(response3));
@@ -1052,34 +1063,35 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
        // Reader 81 anticoll. CSN
        // Tag    CSN
 
        // Reader 81 anticoll. CSN
        // Tag    CSN
 
-       uint8_t *resp;
-       int respLen;
-       uint8_t* respdata = NULL;
-       int respsize = 0;
-       uint8_t sof = 0x0f;
+       uint8_t *modulated_response;
+       int modulated_response_size;
+       uint8_t* trace_data = NULL;
+       int trace_data_size = 0;
+       //uint8_t sof = 0x0f;
 
 
-       // Respond SOF -- takes 8 bytes
-       uint8_t *resp1 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET);
+       // free eventually allocated BigBuf memory
+       BigBuf_free();
+       // Respond SOF -- takes 1 bytes
+       uint8_t *resp1 = BigBuf_malloc(2);
        int resp1Len;
 
        // Anticollision CSN (rotated CSN)
        int resp1Len;
 
        // Anticollision CSN (rotated CSN)
-       // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
-       uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 10);
+       // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+       uint8_t *resp2 = BigBuf_malloc(28);
        int resp2Len;
 
        // CSN
        int resp2Len;
 
        // CSN
-       // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
-       uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 190);
+       // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+       uint8_t *resp3 = BigBuf_malloc(30);
        int resp3Len;
 
        // e-Purse
        int resp3Len;
 
        // e-Purse
-       // 144: Takes 16 bytes for SOF/EOF and 8 * 16 = 128 bytes (2 bytes/bit)
-       uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 370);
+       // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
+       uint8_t *resp4 = BigBuf_malloc(20);
        int resp4Len;
 
        int resp4Len;
 
-       // + 1720..
-       uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
-       memset(receivedCmd, 0x44, RECV_CMD_SIZE);
+       uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
+       memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
        int len;
 
        // Prepare card messages
        int len;
 
        // Prepare card messages
@@ -1121,11 +1133,6 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
        LED_A_ON();
        bool buttonPressed = false;
 
        LED_A_ON();
        bool buttonPressed = false;
 
-       /** Hack  for testing
-       memcpy(reader_mac_buf,csn,8);
-       exitLoop = true;
-       end hack **/
-
        while(!exitLoop) {
 
                LED_B_OFF();
        while(!exitLoop) {
 
                LED_B_OFF();
@@ -1144,40 +1151,41 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                // Okay, look at the command now.
                if(receivedCmd[0] == 0x0a ) {
                        // Reader in anticollission phase
                // Okay, look at the command now.
                if(receivedCmd[0] == 0x0a ) {
                        // Reader in anticollission phase
-                       resp = resp1; respLen = resp1Len; //order = 1;
-                       respdata = &sof;
-                       respsize = sizeof(sof);
+                       modulated_response = resp1; modulated_response_size = resp1Len; //order = 1;
+                       trace_data = response1;
+                       trace_data_size = sizeof(response1);
                } else if(receivedCmd[0] == 0x0c) {
                        // Reader asks for anticollission CSN
                } else if(receivedCmd[0] == 0x0c) {
                        // Reader asks for anticollission CSN
-                       resp = resp2; respLen = resp2Len; //order = 2;
-                       respdata = response2;
-                       respsize = sizeof(response2);
+                       modulated_response = resp2; modulated_response_size = resp2Len; //order = 2;
+                       trace_data = response2;
+                       trace_data_size = sizeof(response2);
                        //DbpString("Reader requests anticollission CSN:");
                } else if(receivedCmd[0] == 0x81) {
                        // Reader selects anticollission CSN.
                        // Tag sends the corresponding real CSN
                        //DbpString("Reader requests anticollission CSN:");
                } else if(receivedCmd[0] == 0x81) {
                        // Reader selects anticollission CSN.
                        // Tag sends the corresponding real CSN
-                       resp = resp3; respLen = resp3Len; //order = 3;
-                       respdata = response3;
-                       respsize = sizeof(response3);
+                       modulated_response = resp3; modulated_response_size = resp3Len; //order = 3;
+                       trace_data = response3;
+                       trace_data_size = sizeof(response3);
                        //DbpString("Reader selects anticollission CSN:");
                } else if(receivedCmd[0] == 0x88) {
                        // Read e-purse (88 02)
                        //DbpString("Reader selects anticollission CSN:");
                } else if(receivedCmd[0] == 0x88) {
                        // Read e-purse (88 02)
-                       resp = resp4; respLen = resp4Len; //order = 4;
-                       respdata = response4;
-                       respsize = sizeof(response4);
+                       modulated_response = resp4; modulated_response_size = resp4Len; //order = 4;
+                       trace_data = response4;
+                       trace_data_size = sizeof(response4);
                        LED_B_ON();
                } else if(receivedCmd[0] == 0x05) {
                        // Reader random and reader MAC!!!
                        // Do not respond
             // We do not know what to answer, so lets keep quiet
                        LED_B_ON();
                } else if(receivedCmd[0] == 0x05) {
                        // Reader random and reader MAC!!!
                        // Do not respond
             // We do not know what to answer, so lets keep quiet
-                       resp = resp1; respLen = 0; //order = 5;
-                       respdata = NULL;
-                       respsize = 0;
+                       modulated_response = resp1; modulated_response_size = 0; //order = 5;
+                       trace_data = NULL;
+                       trace_data_size = 0;
                        if (breakAfterMacReceived){
                                // dbprintf:ing ...
                        if (breakAfterMacReceived){
                                // dbprintf:ing ...
-                               Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
+                               Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x"
+                                                  ,csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
                                Dbprintf("RDR:  (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len,
                                Dbprintf("RDR:  (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len,
-                                                receivedCmd[0], receivedCmd[1], receivedCmd[2],
+                                               receivedCmd[0], receivedCmd[1], receivedCmd[2],
                                                receivedCmd[3], receivedCmd[4], receivedCmd[5],
                                                receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                                if (reader_mac_buf != NULL)
                                                receivedCmd[3], receivedCmd[4], receivedCmd[5],
                                                receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                                if (reader_mac_buf != NULL)
@@ -1188,9 +1196,9 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                        }
                } else if(receivedCmd[0] == 0x00 && len == 1) {
                        // Reader ends the session
                        }
                } else if(receivedCmd[0] == 0x00 && len == 1) {
                        // Reader ends the session
-                       resp = resp1; respLen = 0; //order = 0;
-                       respdata = NULL;
-                       respsize = 0;
+                       modulated_response = resp1; modulated_response_size = 0; //order = 0;
+                       trace_data = NULL;
+                       trace_data_size = 0;
                } else {
                        //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44
                        // Never seen this command before
                } else {
                        //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44
                        // Never seen this command before
@@ -1200,9 +1208,9 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                        receivedCmd[3], receivedCmd[4], receivedCmd[5],
                        receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                        // Do not respond
                        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;
+                       modulated_response = resp1; modulated_response_size = 0; //order = 0;
+                       trace_data = NULL;
+                       trace_data_size = 0;
                }
 
                if(cmdsRecvd >  100) {
                }
 
                if(cmdsRecvd >  100) {
@@ -1212,21 +1220,22 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                else {
                        cmdsRecvd++;
                }
                else {
                        cmdsRecvd++;
                }
-
-               if(respLen > 0) {
-                       SendIClassAnswer(resp, respLen, 21);
+               /**
+               A legit tag has about 380us delay between reader EOT and tag SOF.
+               **/
+               if(modulated_response_size > 0) {
+                       SendIClassAnswer(modulated_response, modulated_response_size, 1);
                        t2r_time = GetCountSspClk();
                }
 
                if (tracing) {
                        t2r_time = GetCountSspClk();
                }
 
                if (tracing) {
-                       LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, Uart.parityBits,TRUE);
-                       LogTrace(NULL,0, (r2t_time-time_0) << 4, 0,TRUE);
-
-                       if (respdata != NULL) {
-                               LogTrace(respdata,respsize, (t2r_time-time_0) << 4,SwapBits(GetParity(respdata,respsize),respsize),FALSE);
-                               LogTrace(NULL,0, (t2r_time-time_0) << 4,0,FALSE);
-
+                       uint8_t parity[MAX_PARITY_SIZE];
+                       GetParity(receivedCmd, len, parity);
+                       LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, (r2t_time-time_0) << 4, parity, TRUE);
 
 
+                       if (trace_data != NULL) {
+                               GetParity(trace_data, trace_data_size, parity);
+                               LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, FALSE);
                        }
                        if(!tracing) {
                                DbpString("Trace full");
                        }
                        if(!tracing) {
                                DbpString("Trace full");
@@ -1234,12 +1243,14 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                        }
 
                }
                        }
 
                }
-               memset(receivedCmd, 0x44, RECV_CMD_SIZE);
+               memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
        }
 
        //Dbprintf("%x", cmdsRecvd);
        LED_A_OFF();
        LED_B_OFF();
        }
 
        //Dbprintf("%x", cmdsRecvd);
        LED_A_OFF();
        LED_B_OFF();
+       LED_C_OFF();
+
        if(buttonPressed)
        {
                DbpString("Button pressed");
        if(buttonPressed)
        {
                DbpString("Button pressed");
@@ -1252,7 +1263,8 @@ static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
        int i = 0, d=0;//, u = 0, d = 0;
        uint8_t b = 0;
 
        int i = 0, d=0;//, u = 0, d = 0;
        uint8_t b = 0;
 
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
+       //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K_8BIT);
 
        AT91C_BASE_SSC->SSC_THR = 0x00;
        FpgaSetupSsc();
 
        AT91C_BASE_SSC->SSC_THR = 0x00;
        FpgaSetupSsc();
@@ -1276,7 +1288,8 @@ static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
                        AT91C_BASE_SSC->SSC_THR = b;
                }
 
                        AT91C_BASE_SSC->SSC_THR = b;
                }
 
-               if (i > respLen +4) break;
+//             if (i > respLen +4) break;
+               if (i > respLen +1) break;
        }
 
        return 0;
        }
 
        return 0;
@@ -1295,9 +1308,9 @@ static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int
   FpgaSetupSsc();
 
    if (wait)
   FpgaSetupSsc();
 
    if (wait)
-    if(*wait < 10)
-      *wait = 10;
-
+   {
+     if(*wait < 10) *wait = 10;
+     
   for(c = 0; c < *wait;) {
     if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
       AT91C_BASE_SSC->SSC_THR = 0x00;          // For exact timing!
   for(c = 0; c < *wait;) {
     if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
       AT91C_BASE_SSC->SSC_THR = 0x00;          // For exact timing!
@@ -1310,6 +1323,9 @@ static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int
     WDT_HIT();
   }
 
     WDT_HIT();
   }
 
+   }
+
+
   uint8_t sendbyte;
   bool firstpart = TRUE;
   c = 0;
   uint8_t sendbyte;
   bool firstpart = TRUE;
   c = 0;
@@ -1390,10 +1406,8 @@ void ReaderTransmitIClass(uint8_t* frame, int len)
 {
   int wait = 0;
   int samples = 0;
 {
   int wait = 0;
   int samples = 0;
-  int par = 0;
 
   // This is tied to other size changes
 
   // This is tied to other size changes
-  //   uint8_t* frame_addr = ((uint8_t*)BigBuf) + 2024;
   CodeIClassCommand(frame,len);
 
   // Select the card
   CodeIClassCommand(frame,len);
 
   // Select the card
@@ -1402,7 +1416,11 @@ void ReaderTransmitIClass(uint8_t* frame, int len)
        LED_A_ON();
 
   // Store reader command in buffer
        LED_A_ON();
 
   // Store reader command in buffer
-  if (tracing) LogTrace(frame,len,rsamples,par,TRUE);
+       if (tracing) {
+               uint8_t par[MAX_PARITY_SIZE];
+               GetParity(frame, len, par);
+               LogTrace(frame, len, rsamples, rsamples, par, TRUE);
+       }
 }
 
 //-----------------------------------------------------------------------------
 }
 
 //-----------------------------------------------------------------------------
@@ -1433,7 +1451,7 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples,
        for(;;) {
                WDT_HIT();
 
        for(;;) {
                WDT_HIT();
 
-               if(BUTTON_PRESS()) return FALSE;
+           if(BUTTON_PRESS()) return FALSE;
 
                if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
                        AT91C_BASE_SSC->SSC_THR = 0x00;  // To make use of exact timing of next command from reader!!
 
                if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
                        AT91C_BASE_SSC->SSC_THR = 0x00;  // To make use of exact timing of next command from reader!!
@@ -1444,10 +1462,7 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples,
                        b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        skip = !skip;
                        if(skip) continue;
                        b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        skip = !skip;
                        if(skip) continue;
-                       /*if(ManchesterDecoding((b>>4) & 0xf)) {
-                               *samples = ((c - 1) << 3) + 4;
-                               return TRUE;
-                       }*/
+               
                        if(ManchesterDecoding(b & 0x0f)) {
                                *samples = c << 3;
                                return  TRUE;
                        if(ManchesterDecoding(b & 0x0f)) {
                                *samples = c << 3;
                                return  TRUE;
@@ -1461,87 +1476,176 @@ int ReaderReceiveIClass(uint8_t* receivedAnswer)
   int samples = 0;
   if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE;
   rsamples += samples;
   int samples = 0;
   if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE;
   rsamples += samples;
-  if (tracing) LogTrace(receivedAnswer,Demod.len,rsamples,Demod.parityBits,FALSE);
+  if (tracing) {
+       uint8_t parity[MAX_PARITY_SIZE];
+       GetParity(receivedAnswer, Demod.len, parity);
+       LogTrace(receivedAnswer,Demod.len,rsamples,rsamples,parity,FALSE);
+  }
   if(samples == 0) return FALSE;
   return Demod.len;
 }
 
   if(samples == 0) return FALSE;
   return Demod.len;
 }
 
-// Reader iClass Anticollission
-void ReaderIClass(uint8_t arg0) {
-       uint8_t act_all[]     = { 0x0a };
-       uint8_t identify[]    = { 0x0c };
-       uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+void setupIclassReader()
+{
+    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+    // Reset trace buffer
+       set_tracing(TRUE);
+       clear_trace();
 
 
-       uint8_t* resp = (((uint8_t *)BigBuf) + 3560);   // was 3560 - tied to other size changes
+    // Setup SSC
+    FpgaSetupSsc();
+    // Start from off (no field generated)
+    // Signal field is off with the appropriate LED
+    LED_D_OFF();
+    FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+    SpinDelay(200);
 
 
-    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+    SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
 
-       // Reset trace buffer
-    iso14a_set_tracing(TRUE);
-    iso14a_clear_trace();
+    // Now give it time to spin up.
+    // Signal field is on with the appropriate LED
+    FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
+    SpinDelay(200);
+    LED_A_ON();
 
 
-       // Setup SSC
-       FpgaSetupSsc();
-       // Start from off (no field generated)
-       // Signal field is off with the appropriate LED
-       LED_D_OFF();
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       SpinDelay(200);
+}
 
 
-       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+size_t sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries)
+{
+       while(retries-- > 0)
+       {
+               ReaderTransmitIClass(command, cmdsize);
+               if(expected_size == ReaderReceiveIClass(resp)){
+                       return 0;
+               }
+       }
+       return 1;//Error
+}
 
 
-       // Now give it time to spin up.
-       // Signal field is on with the appropriate LED
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
-       SpinDelay(200);
+/**
+ * @brief Talks to an iclass tag, sends the commands to get CSN and CC.
+ * @param card_data where the CSN and CC are stored for return
+ * @return 0 = fail
+ *         1 = Got CSN
+ *         2 = Got CSN and CC
+ */
+uint8_t handshakeIclassTag(uint8_t *card_data)
+{
+       static uint8_t act_all[]     = { 0x0a };
+       static uint8_t identify[]    = { 0x0c };
+       static uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+       static uint8_t readcheck_cc[]= { 0x88, 0x02 };
+       uint8_t resp[ICLASS_BUFFER_SIZE];
+
+       uint8_t read_status = 0;
+
+       // Send act_all
+       ReaderTransmitIClass(act_all, 1);
+       // Card present?
+       if(!ReaderReceiveIClass(resp)) return read_status;//Fail
+       //Send Identify
+       ReaderTransmitIClass(identify, 1);
+       //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC
+       uint8_t len  = ReaderReceiveIClass(resp);
+       if(len != 10) return read_status;//Fail
+
+       //Copy the Anti-collision CSN to our select-packet
+       memcpy(&select[1],resp,8);
+       //Select the card
+       ReaderTransmitIClass(select, sizeof(select));
+       //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC
+       len  = ReaderReceiveIClass(resp);
+       if(len != 10) return read_status;//Fail
+
+       //Success - level 1, we got CSN
+       //Save CSN in response data
+       memcpy(card_data,resp,8);
+
+       //Flag that we got to at least stage 1, read CSN
+       read_status = 1;
+
+       // Card selected, now read e-purse (cc)
+       ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
+       if(ReaderReceiveIClass(resp) == 8) {
+               //Save CC (e-purse) in response data
+               memcpy(card_data+8,resp,8);
+
+               //Got both
+               read_status = 2;
+       }
 
 
-       LED_A_ON();
+       return read_status;
+}
 
 
-       for(;;) {
+// Reader iClass Anticollission
+void ReaderIClass(uint8_t arg0) {
+
+    uint8_t card_data[24]={0};
+    uint8_t last_csn[8]={0};
        
        
-               if(traceLen > TRACE_SIZE) {
+    int read_status= 0;
+    bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
+       bool get_cc = arg0 & FLAG_ICLASS_READER_GET_CC;
+       set_tracing(TRUE);
+    setupIclassReader();
+
+    size_t datasize = 0;
+    while(!BUTTON_PRESS())
+    {
+
+               if(!tracing) {
                        DbpString("Trace full");
                        break;
                }
                        DbpString("Trace full");
                        break;
                }
-               
-               if (BUTTON_PRESS()) break;
+               WDT_HIT();
 
 
-               // Send act_all
-               ReaderTransmitIClass(act_all, 1);
-               // Card present?
-               if(ReaderReceiveIClass(resp)) {
-                       ReaderTransmitIClass(identify, 1);
-                       if(ReaderReceiveIClass(resp) == 10) {
-                               // Select card          
-                               memcpy(&select[1],resp,8);
-                               ReaderTransmitIClass(select, sizeof(select));
+               read_status = handshakeIclassTag(card_data);
 
 
-                               if(ReaderReceiveIClass(resp) == 10) {
-                                       Dbprintf("     Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
-                                       resp[0], resp[1], resp[2],
-                                       resp[3], resp[4], resp[5],
-                                       resp[6], resp[7]);
+               if(read_status == 0) continue;
+               if(read_status == 1) datasize = 8;
+               if(read_status == 2) datasize = 16;
+
+                    LED_B_ON();
+                    //Send back to client, but don't bother if we already sent this
+                    if(memcmp(last_csn, card_data, 8) != 0)
+               {
+
+                       if(!get_cc || (get_cc && read_status == 2))
+                       {
+                        cmd_send(CMD_ACK,read_status,0,0,card_data,datasize);
+                               if(abort_after_read) {
+                                       LED_A_OFF();
+                                       return;
                                }
                                }
-                               // Card selected, whats next... ;-)
+                    //Save that we already sent this....
+                        memcpy(last_csn, card_data, 8);
                        }
                        }
+                       //If 'get_cc' was specified and we didn't get a CC, we'll just keep trying...
                }
                }
-               WDT_HIT();
-       }
-       
-       LED_A_OFF();
+               LED_B_OFF();
+    }
+    cmd_send(CMD_ACK,0,0,0,card_data, 0);
+    LED_A_OFF();
 }
 
 void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
 }
 
 void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
-       uint8_t act_all[]     = { 0x0a };
-       uint8_t identify[]    = { 0x0c };
-       uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
-       uint8_t readcheck_cc[]= { 0x88, 0x02 };
+
+       uint8_t card_data[USB_CMD_DATA_SIZE]={0};
+       uint16_t block_crc_LUT[255] = {0};
+
+       {//Generate a lookup table for block crc
+               for(int block = 0; block < 255; block++){
+                       char bl = block;
+                       block_crc_LUT[block] = iclass_crc16(&bl ,1);
+               }
+       }
+       //Dbprintf("Lookup table: %02x %02x %02x" ,block_crc_LUT[0],block_crc_LUT[1],block_crc_LUT[2]);
+
        uint8_t check[]       = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        uint8_t read[]        = { 0x0c, 0x00, 0x00, 0x00 };
        
     uint16_t crc = 0;
        uint8_t cardsize=0;
        uint8_t check[]       = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        uint8_t read[]        = { 0x0c, 0x00, 0x00, 0x00 };
        
     uint16_t crc = 0;
        uint8_t cardsize=0;
-       bool read_success=false;
        uint8_t mem=0;
        
        static struct memory_t{
        uint8_t mem=0;
        
        static struct memory_t{
@@ -1552,89 +1656,44 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
          int keyaccess;
        } memory;
        
          int keyaccess;
        } memory;
        
-       uint8_t* resp = (((uint8_t *)BigBuf) + 3560);   // was 3560 - tied to other size changes
-    // Enable and clear the trace
-    iso14a_set_tracing(TRUE);
-    iso14a_clear_trace();
-
-
-
-       // Setup SSC
-       FpgaSetupSsc();
-       // Start from off (no field generated)
-       // Signal field is off with the appropriate LED
-       LED_D_OFF();
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       SpinDelay(200);
-
-       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
-
-       // Now give it time to spin up.
-       // Signal field is on with the appropriate LED
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
-       SpinDelay(200);
-
-       LED_A_ON();
+       uint8_t resp[ICLASS_BUFFER_SIZE];
+       
+    setupIclassReader();
+       set_tracing(TRUE);
 
 
-       for(int i=0;i<1;i++) {
+       while(!BUTTON_PRESS()) {
        
        
-               if(traceLen > TRACE_SIZE) {
+               WDT_HIT();
+
+               if(!tracing) {
                        DbpString("Trace full");
                        break;
                }
                
                        DbpString("Trace full");
                        break;
                }
                
-               if (BUTTON_PRESS()) break;
-
-               // Send act_all
-               ReaderTransmitIClass(act_all, 1);
-               // Card present?
-               if(ReaderReceiveIClass(resp)) {
-                       ReaderTransmitIClass(identify, 1);
-                       if(ReaderReceiveIClass(resp) == 10) {
-                               // Select card          
-                               memcpy(&select[1],resp,8);
-                               ReaderTransmitIClass(select, sizeof(select));
+               uint8_t read_status = handshakeIclassTag(card_data);
+               if(read_status < 2) continue;
 
 
-                               if(ReaderReceiveIClass(resp) == 10) {
-                                       Dbprintf("     Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
-                                       resp[0], resp[1], resp[2],
-                                       resp[3], resp[4], resp[5],
-                                       resp[6], resp[7]);
-                               }
-                               // Card selected
-                               Dbprintf("Readcheck on Sector 2");
-                               ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
-                               if(ReaderReceiveIClass(resp) == 8) {
-                                  Dbprintf("     CC: %02x %02x %02x %02x %02x %02x %02x %02x",
-                                       resp[0], resp[1], resp[2],
-                                       resp[3], resp[4], resp[5],
-                                       resp[6], resp[7]);
-                               }else return;
-                               Dbprintf("Authenticate");
                                //for now replay captured auth (as cc not updated)
                                memcpy(check+5,MAC,4);
                                //for now replay captured auth (as cc not updated)
                                memcpy(check+5,MAC,4);
-                               Dbprintf("     AA: %02x %02x %02x %02x",
-                                       check[5], check[6], check[7],check[8]);
-                               ReaderTransmitIClass(check, sizeof(check));
-                               if(ReaderReceiveIClass(resp) == 4) {
-                                  Dbprintf("     AR: %02x %02x %02x %02x",
-                                       resp[0], resp[1], resp[2],resp[3]);
-                               }else {
+
+               if(sendCmdGetResponseWithRetries(check, sizeof(check),resp, 4, 5))
+               {
                                  Dbprintf("Error: Authentication Fail!");
                                  Dbprintf("Error: Authentication Fail!");
-                                 return;
+                       continue;
                                }
                                }
-                               Dbprintf("Dump Contents");
-                               //first get configuration block
-                               read_success=false;
+
+               //first get configuration block (block 1)
+               crc = block_crc_LUT[1];
                                read[1]=1;
                                read[1]=1;
-                               uint8_t *blockno=&read[1];
-                               crc = iclass_crc16((char *)blockno,1);
                                read[2] = crc >> 8;
                                read[3] = crc & 0xff;
                                read[2] = crc >> 8;
                                read[3] = crc & 0xff;
-                               while(!read_success){
-                                     ReaderTransmitIClass(read, sizeof(read));
-                                     if(ReaderReceiveIClass(resp) == 10) {
-                                        read_success=true;
+
+               if(sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10))
+               {
+                       Dbprintf("Dump config (block 1) failed");
+                       continue;
+               }
+
                                         mem=resp[5];
                                         memory.k16= (mem & 0x80);
                                         memory.book= (mem & 0x20);
                                         mem=resp[5];
                                         memory.k16= (mem & 0x80);
                                         memory.book= (mem & 0x20);
@@ -1642,120 +1701,69 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
                                         memory.lockauth= (mem & 0x2);
                                         memory.keyaccess= (mem & 0x1);
 
                                         memory.lockauth= (mem & 0x2);
                                         memory.keyaccess= (mem & 0x1);
 
-                                     }
-                               }
-                               if (memory.k16){
-                                 cardsize=255;
-                               }else cardsize=32;
+               cardsize = memory.k16 ? 255 : 32;
+               WDT_HIT();
+               //Set card_data to all zeroes, we'll fill it with data
+               memset(card_data,0x0,USB_CMD_DATA_SIZE);
+               uint8_t failedRead =0;
+               uint8_t stored_data_length =0;
                                //then loop around remaining blocks
                                //then loop around remaining blocks
-                               for(uint8_t j=0; j<cardsize; j++){
-                                   read_success=false;
-                                   uint8_t *blockno=&j;
-                                   //crc_data[0]=j;
-                                   read[1]=j;
-                                   crc = iclass_crc16((char *)blockno,1);
+               for(int block=0; block < cardsize; block++){
+
+                       read[1]= block;
+                       crc = block_crc_LUT[block];
                                    read[2] = crc >> 8;
                                    read[3] = crc & 0xff;
                                    read[2] = crc >> 8;
                                    read[3] = crc & 0xff;
-                                   while(!read_success){
-                                     ReaderTransmitIClass(read, sizeof(read));
-                                     if(ReaderReceiveIClass(resp) == 10) {
-                                        read_success=true;
+
+                       if(!sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10))
+                       {
                                         Dbprintf("     %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
                                         Dbprintf("     %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
-                                         j, resp[0], resp[1], resp[2],
+                                                block, resp[0], resp[1], resp[2],
                                          resp[3], resp[4], resp[5],
                                          resp[6], resp[7]);
                                          resp[3], resp[4], resp[5],
                                          resp[6], resp[7]);
-                                     }
-                                   }
+
+                               //Fill up the buffer
+                               memcpy(card_data+stored_data_length,resp,8);
+                               stored_data_length += 8;
+
+                               if(stored_data_length +8 > USB_CMD_DATA_SIZE)
+                               {//Time to send this off and start afresh
+                                       cmd_send(CMD_ACK,
+                                                        stored_data_length,//data length
+                                                        failedRead,//Failed blocks?
+                                                        0,//Not used ATM
+                                                        card_data, stored_data_length);
+                                       //reset
+                                       stored_data_length = 0;
+                                       failedRead = 0;
                                }
                                }
+
+                       }else{
+                               failedRead = 1;
+                               stored_data_length +=8;//Otherwise, data becomes misaligned
+                               Dbprintf("Failed to dump block %d", block);
                        }
                }
                        }
                }
-               WDT_HIT();
+               //Send off any remaining data
+               if(stored_data_length > 0)
+               {
+                       cmd_send(CMD_ACK,
+                                        stored_data_length,//data length
+                                        failedRead,//Failed blocks?
+                                        0,//Not used ATM
+                                        card_data, stored_data_length);
+               }
+               //If we got here, let's break
+               break;
        }
        }
-       
-       LED_A_OFF();
-}
-
-//1. Create Method to Read sectors/blocks 0,1,2 and Send to client
-void IClass_iso14443A_GetPublic(uint8_t arg0) {
-       uint8_t act_all[]     = { 0x0a };
-       uint8_t identify[]    = { 0x0c };
-       uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
-       uint8_t readcheck_cc[]= { 0x88, 0x02 }; 
-
-    uint8_t card_data[24]={0};
-    uint8_t* resp = (((uint8_t *)BigBuf) + 3560);      // was 3560 - tied to other size changes
-    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
-
-    int read_success= 0;
-
-    // Enable and clear the trace
-    iso14a_set_tracing(TRUE);
-    iso14a_clear_trace();
-
-       // Setup SSC
-       FpgaSetupSsc();
-       // Start from off (no field generated)
-       // Signal field is off with the appropriate LED
-       LED_D_OFF();
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       SpinDelay(200);
-
-       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
-
-       // Now give it time to spin up.
-       // Signal field is on with the appropriate LED
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
-       SpinDelay(200);
-
-       LED_A_ON();
-
-    // Send act_all
-    ReaderTransmitIClass(act_all, 1);
-    // Card present?
-    if(ReaderReceiveIClass(resp)) {
-        ReaderTransmitIClass(identify, 1);
-        if(ReaderReceiveIClass(resp) == 10) {
-            //Copy the Anti-collision CSN to our select-packet
-            memcpy(&select[1],resp,8);
-            Dbprintf("Anti-collision CSN: %02x %02x %02x %02x %02x %02x %02x %02x",resp[0], resp[1], resp[2],
-                    resp[3], resp[4], resp[5],
-                    resp[6], resp[7]);
-            //Select the card
-            ReaderTransmitIClass(select, sizeof(select));
-
-            if(ReaderReceiveIClass(resp) == 10) {
-                Dbprintf("     Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
-                resp[0], resp[1], resp[2],
-                resp[3], resp[4], resp[5],
-                resp[6], resp[7]);
-                //Save CSN in response data
-                memcpy(card_data,resp,8);
-                //Flag that we got to at least stage 1, read CSN
-                read_success = 1;
-
-                // Card selected
-                Dbprintf("Readcheck on Sector 2");
-                ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
-                if(ReaderReceiveIClass(resp) == 8) {
-                   Dbprintf("     CC: %02x %02x %02x %02x %02x %02x %02x %02x",
-                    resp[0], resp[1], resp[2],
-                    resp[3], resp[4], resp[5],
-                    resp[6], resp[7]);
-                //Save CC (e-purse) in response data
-                memcpy(card_data+8,resp,8);
-                //Got both
-                read_success = 2;
-                }
-            }
-        }
-    }
-    WDT_HIT();
+       //Signal end of transmission
+       cmd_send(CMD_ACK,
+                        0,//data length
+                        0,//Failed blocks?
+                        0,//Not used ATM
+                        card_data, 0);
 
        LED_A_OFF();
 
        LED_A_OFF();
-       LED_B_ON();
-    //Send back to client
-    cmd_send(CMD_ACK,read_success,0,0,card_data,16);
-       LED_B_OFF();
 }
 
 //2. Create Read method (cut-down from above) based off responses from 1. 
 }
 
 //2. Create Read method (cut-down from above) based off responses from 1. 
@@ -1773,10 +1781,10 @@ void IClass_iso14443A_write(uint8_t arg0, uint8_t blockNo, uint8_t *data, uint8_
        
     uint16_t crc = 0;
        
        
     uint16_t crc = 0;
        
-       uint8_t* resp = (((uint8_t *)BigBuf) + 3560);   // was 3560 - tied to other size changes
+       uint8_t* resp = (((uint8_t *)BigBuf) + 3560);
 
        // Reset trace buffer
 
        // Reset trace buffer
-    memset(trace, 0x44, RECV_CMD_OFFSET);
+       memset(trace, 0x44, RECV_CMD_OFFSET);
        traceLen = 0;
 
        // Setup SSC
        traceLen = 0;
 
        // Setup SSC
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