]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/lfops.c
Small fixes,
[proxmark3-svn] / armsrc / lfops.c
index a0fa870b62bf7e1e5e4a5dca76682406a8d83f1b..e086a7174d3e252bf21909ab46fc764e9bc6b121 100644 (file)
@@ -8,14 +8,16 @@
 // Also routines for raw mode reading/simulating of LF waveform
 //-----------------------------------------------------------------------------
 
-#include "proxmark3.h"
+#include "../include/proxmark3.h"
 #include "apps.h"
 #include "util.h"
-#include "hitag2.h"
-#include "crc16.h"
+#include "../include/hitag2.h"
+#include "../common/crc16.h"
 #include "string.h"
+#include "crapto1.h"
+#include "mifareutil.h"
 
-void AcquireRawAdcSamples125k(int divisor)
+void LFSetupFPGAForADC(int divisor, bool lf_field)
 {
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        if ( (divisor == 1) || (divisor < 0) || (divisor > 255) )
@@ -25,29 +27,38 @@ void AcquireRawAdcSamples125k(int divisor)
        else
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor);
 
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | (lf_field ? FPGA_LF_ADC_READER_FIELD : 0));
 
        // Connect the A/D to the peak-detected low-frequency path.
        SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-
+       
        // Give it a bit of time for the resonant antenna to settle.
-       SpinDelay(50);
-
+       SpinDelay(150);
+       
        // Now set up the SSC to get the ADC samples that are now streaming at us.
        FpgaSetupSsc();
+}
+
+void AcquireRawAdcSamples125k(int divisor)
+{
+       LFSetupFPGAForADC(divisor, true);
+       DoAcquisition125k(-1);
+}
 
-       // Now call the acquisition routine
-       DoAcquisition125k();
+void SnoopLFRawAdcSamples(int divisor, int trigger_threshold)
+{
+       LFSetupFPGAForADC(divisor, false);
+       DoAcquisition125k(trigger_threshold);
 }
 
 // split into two routines so we can avoid timing issues after sending commands //
-void DoAcquisition125k(void)
+void DoAcquisition125k(int trigger_threshold)
 {
-       uint8_t *dest = (uint8_t *)BigBuf;
-       int n = sizeof(BigBuf);
+       uint8_t *dest =  mifare_get_bigbufptr();
+       int n = 8000;
        int i;
 
-       memset(dest, 0, n);
+       memset(dest, 0x00, n);
        i = 0;
        for(;;) {
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
@@ -56,13 +67,17 @@ void DoAcquisition125k(void)
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       i++;
                        LED_D_OFF();
-                       if (i >= n) break;
+                       if (trigger_threshold != -1 && dest[i] < trigger_threshold)
+                               continue;
+                       else
+                               trigger_threshold = -1;
+                       if (++i >= n) break;
                }
        }
        Dbprintf("buffer samples: %02x %02x %02x %02x %02x %02x %02x %02x ...",
                        dest[0], dest[1], dest[2], dest[3], dest[4], dest[5], dest[6], dest[7]);
+                       
 }
 
 void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, uint8_t *command)
@@ -85,7 +100,7 @@ void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1,
        else
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
 
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // Give it a bit of time for the resonant antenna to settle.
        SpinDelay(50);
@@ -105,7 +120,7 @@ void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1,
                else
                        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
 
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+               FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
                LED_D_ON();
                if(*(command++) == '0')
                        SpinDelayUs(period_0);
@@ -120,10 +135,10 @@ void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1,
        else
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
 
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // now do the read
-       DoAcquisition125k();
+       DoAcquisition125k(-1);
 }
 
 /* blank r/w tag data stream
@@ -609,7 +624,7 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // Connect the A/D to the peak-detected low-frequency path.
        SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
@@ -815,24 +830,12 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 
 void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 {
-       uint8_t *dest = (uint8_t *)BigBuf;
+       uint8_t *dest =  mifare_get_bigbufptr();
        int m=0, n=0, i=0, idx=0, lastval=0;
        int found=0;
        uint32_t code=0, code2=0;
-       //uint32_t hi2=0, hi=0, lo=0;
-
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-
-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
 
-       // Give it a bit of time for the resonant antenna to settle.
-       SpinDelay(50);
-
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
+       LFSetupFPGAForADC(0, true);
 
        for(;;) {
                WDT_HIT();
@@ -846,7 +849,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                }
 
                i = 0;
-               m = sizeof(BigBuf);
+               m = 30000;
                memset(dest,128,m);
                for(;;) {
                        if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
@@ -858,13 +861,12 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                                dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                                // we don't care about actual value, only if it's more or less than a
                                // threshold essentially we capture zero crossings for later analysis
-                               if(dest[i] < 127) dest[i] = 0; else dest[i] = 1;
-                               i++;
+                               dest[i] = (dest[i] < 127) ? 0 : 1;
+                               ++i;
                                if (ledcontrol)
                                        LED_D_OFF();
-                               if(i >= m) {
+                               if(i >= m)      
                                        break;
-                               }
                        }
                }
 
@@ -884,12 +886,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                for( i=0; idx<m; idx++) {
                        if (dest[idx-1]<dest[idx]) {
                                dest[i]=idx-lastval;
-                               if (dest[i] <= 8) {
-                                               dest[i]=1;
-                               } else {
-                                               dest[i]=0;
-                               }
-
+                               dest[i] = (dest[i] <= 8) ? 1:0;
                                lastval=idx;
                                i++;
                        }
@@ -917,90 +914,23 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                                } else {
                                        n=(n+1)/6;                      // fc/10 in sets of 6
                                }
-                               switch (n) {                    // stuff appropriate bits in buffer
-                                       case 0:
-                                       case 1: // one bit
-                                               dest[i++]=dest[idx-1]^1;
-                                               //Dbprintf("%d",dest[idx-1]);
-                                               break;
-                                       case 2: // two bits
-                                               dest[i++]=dest[idx-1]^1;
-                                               dest[i++]=dest[idx-1]^1;
-                                               //Dbprintf("%d",dest[idx-1]);
-                                               //Dbprintf("%d",dest[idx-1]);
-                                               break;
-                                       case 3: // 3 bit start of frame markers
-                                               for(int j=0; j<3; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                               //  Dbprintf("%d",dest[idx-1]);
-                                               }
-                                               break;
-                                       case 4:
-                                               for(int j=0; j<4; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                               //  Dbprintf("%d",dest[idx-1]);
-                                               }
-                                               break;
-                                       case 5:
-                                               for(int j=0; j<5; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                               //  Dbprintf("%d",dest[idx-1]);
-                                               }
-                                               break;
-                                       case 6:
-                                               for(int j=0; j<6; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                               //  Dbprintf("%d",dest[idx-1]);
-                                               }
-                                               break;
-                                       case 7:
-                                               for(int j=0; j<7; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                               //  Dbprintf("%d",dest[idx-1]);
-                                               }
-                                               break;
-                                       case 8:
-                                               for(int j=0; j<8; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                               //  Dbprintf("%d",dest[idx-1]);
-                                               }
-                                               break;
-                                       case 9:
-                                               for(int j=0; j<9; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                               //  Dbprintf("%d",dest[idx-1]);
-                                               }
-                                               break;
-                                       case 10:
-                                               for(int j=0; j<10; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                               //  Dbprintf("%d",dest[idx-1]);
-                                               }
-                                               break;
-                                       case 11:
-                                               for(int j=0; j<11; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                               //  Dbprintf("%d",dest[idx-1]);
-                                               }
-                                               break;
-                                       case 12:
-                                               for(int j=0; j<12; j++){
-                                                 dest[i++]=dest[idx-1]^1;
-                                                // Dbprintf("%d",dest[idx-1]);
+
+                               // stuff appropriate bits in buffer
+                               if ( n==0 )
+                                       dest[i++]=dest[idx-1]^1;
+                               else {
+                                       if ( n < 13){
+                                               for(int j=0; j<n; j++){
+                                                       dest[i++]=dest[idx-1]^1;
                                                }
-                                               break;
-                                       default:        // this shouldn't happen, don't stuff any bits
-                                               //Dbprintf("%d",dest[idx-1]);
-                                               break;
+                                       }
                                }
+                               
                                n=0;
                                lastval=dest[idx];
                        }
                }//end for
-               /*for(int j=0; j<64;j+=8){
-                 Dbprintf("%d%d%d%d%d%d%d%d",dest[j],dest[j+1],dest[j+2],dest[j+3],dest[j+4],dest[j+5],dest[j+6],dest[j+7]);
-               }
-               Dbprintf("\n");*/
+
                m=i;
                WDT_HIT();
                
@@ -1031,7 +961,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                       unknown <<=1;
                       if (dest[idx+j]) unknown |= 1;
                    }
-                   for(int j=36;j<45;j++){
+                   for(int j=37;j<45;j++){
                       //Dbprintf("%d",dest[idx+j]);
                       number <<=1;
                       if (dest[idx+j]) number |= 1;
@@ -1041,13 +971,14 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                       number <<=1;
                       if (dest[idx+j]) number |= 1;
                    }
+                       
                    for(int j=0; j<32; j++){
-                       code <<=1;
-                       if(dest[idx+j]) code |= 1;
+                               code <<=1;
+                               if(dest[idx+j]) code |= 1;
                    }
                    for(int j=32; j<64; j++){
-                       code2 <<=1;
-                       if(dest[idx+j]) code2 |= 1;
+                               code2 <<=1;
+                               if(dest[idx+j]) code2 |= 1;
                    }
                    
                    Dbprintf("XSF(%02d)%02x:%d (%08x%08x)",version,unknown,number,code,code2);
@@ -1056,17 +987,12 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                }
                // if we're only looking for one tag 
                if (findone){
-                       //*high = hi;
-                       //*low = lo;
                        LED_A_OFF();
                        return;
                }
-      
-               //hi=0;
-               //lo=0;
+
                found=0;
          }
-               
        }
        }
        WDT_HIT();
@@ -1078,14 +1004,14 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
  */
 
 /* T55x7 configuration register definitions */
-#define T55x7_POR_DELAY                        0x00000001
-#define T55x7_ST_TERMINATOR            0x00000008
-#define T55x7_PWD                      0x00000010
+#define T55x7_POR_DELAY                                0x00000001
+#define T55x7_ST_TERMINATOR                    0x00000008
+#define T55x7_PWD                                      0x00000010
 #define T55x7_MAXBLOCK_SHIFT           5
-#define T55x7_AOR                      0x00000200
-#define T55x7_PSKCF_RF_2               0
-#define T55x7_PSKCF_RF_4               0x00000400
-#define T55x7_PSKCF_RF_8               0x00000800
+#define T55x7_AOR                                      0x00000200
+#define T55x7_PSKCF_RF_2                       0
+#define T55x7_PSKCF_RF_4                       0x00000400
+#define T55x7_PSKCF_RF_8                       0x00000800
 #define T55x7_MODULATION_DIRECT                0
 #define T55x7_MODULATION_PSK1          0x00001000
 #define T55x7_MODULATION_PSK2          0x00002000
@@ -1096,17 +1022,17 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 #define T55x7_MODULATION_FSK2a         0x00007000
 #define T55x7_MODULATION_MANCHESTER    0x00008000
 #define T55x7_MODULATION_BIPHASE       0x00010000
-#define T55x7_BITRATE_RF_8             0
-#define T55x7_BITRATE_RF_16            0x00040000
-#define T55x7_BITRATE_RF_32            0x00080000
-#define T55x7_BITRATE_RF_40            0x000C0000
-#define T55x7_BITRATE_RF_50            0x00100000
-#define T55x7_BITRATE_RF_64            0x00140000
+#define T55x7_BITRATE_RF_8                     0
+#define T55x7_BITRATE_RF_16                    0x00040000
+#define T55x7_BITRATE_RF_32                    0x00080000
+#define T55x7_BITRATE_RF_40                    0x000C0000
+#define T55x7_BITRATE_RF_50                    0x00100000
+#define T55x7_BITRATE_RF_64                    0x00140000
 #define T55x7_BITRATE_RF_100           0x00180000
 #define T55x7_BITRATE_RF_128           0x001C0000
 
 /* T5555 (Q5) configuration register definitions */
-#define T5555_ST_TERMINATOR            0x00000001
+#define T5555_ST_TERMINATOR                    0x00000001
 #define T5555_MAXBLOCK_SHIFT           0x00000001
 #define T5555_MODULATION_MANCHESTER    0
 #define T5555_MODULATION_PSK1          0x00000010
@@ -1116,33 +1042,43 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 #define T5555_MODULATION_FSK2          0x00000050
 #define T5555_MODULATION_BIPHASE       0x00000060
 #define T5555_MODULATION_DIRECT                0x00000070
-#define T5555_INVERT_OUTPUT            0x00000080
-#define T5555_PSK_RF_2                 0
-#define T5555_PSK_RF_4                 0x00000100
-#define T5555_PSK_RF_8                 0x00000200
-#define T5555_USE_PWD                  0x00000400
-#define T5555_USE_AOR                  0x00000800
-#define T5555_BITRATE_SHIFT            12
-#define T5555_FAST_WRITE               0x00004000
-#define T5555_PAGE_SELECT              0x00008000
+#define T5555_INVERT_OUTPUT                    0x00000080
+#define T5555_PSK_RF_2                         0
+#define T5555_PSK_RF_4                         0x00000100
+#define T5555_PSK_RF_8                         0x00000200
+#define T5555_USE_PWD                          0x00000400
+#define T5555_USE_AOR                          0x00000800
+#define T5555_BITRATE_SHIFT                    12
+#define T5555_FAST_WRITE                       0x00004000
+#define T5555_PAGE_SELECT                      0x00008000
 
 /*
  * Relevant times in microsecond
  * To compensate antenna falling times shorten the write times
  * and enlarge the gap ones.
  */
-#define START_GAP 250
-#define WRITE_GAP 160
-#define WRITE_0   144 // 192
-#define WRITE_1   400 // 432 for T55x7; 448 for E5550
+#define START_GAP 30*8 // 10 - 50fc 250
+#define WRITE_GAP 20*8 //  8 - 30fc
+#define WRITE_0   24*8 // 16 - 31fc 24fc 192
+#define WRITE_1   54*8 // 48 - 63fc 54fc 432 for T55x7; 448 for E5550
+
+//  VALUES TAKEN FROM EM4x function: SendForward
+//  START_GAP = 440;       (55*8) cycles at 125Khz (8us = 1cycle)
+//  WRITE_GAP = 128;       (16*8)
+//  WRITE_1   = 256 32*8;  (32*8) 
+
+//  These timings work for 4469/4269/4305 (with the 55*8 above)
+//  WRITE_0 = 23*8 , 9*8  SpinDelayUs(23*8); 
+
+#define T55xx_SAMPLES_SIZE             12000 // 32 x 32 x 10  (32 bit times numofblock (7), times clock skip..)
 
 // Write one bit to card
 void T55xxWriteBit(int bit)
 {
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-       if (bit == 0)
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+       if (!bit)
                SpinDelayUs(WRITE_0);
        else
                SpinDelayUs(WRITE_1);
@@ -1153,15 +1089,11 @@ void T55xxWriteBit(int bit)
 // Write one card block in page 0, no lock
 void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
 {
-       unsigned int i;
+       uint32_t i = 0;
 
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-
-       // Give it a bit of time for the resonant antenna to settle.
-       // And for the tag to fully power up
-       SpinDelay(150);
+       // Set up FPGA, 125kHz
+       // Wait for config.. (192+8190xPOW)x8 == 67ms
+       LFSetupFPGAForADC(0, true);
 
        // Now start writting
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
@@ -1170,11 +1102,11 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMod
        // Opcode
        T55xxWriteBit(1);
        T55xxWriteBit(0); //Page 0
-  if (PwdMode == 1){
-    // Pwd
-    for (i = 0x80000000; i != 0; i >>= 1)
-      T55xxWriteBit(Pwd & i);
-  }
+       if (PwdMode == 1){
+               // Pwd
+               for (i = 0x80000000; i != 0; i >>= 1)
+                       T55xxWriteBit(Pwd & i);
+       }
        // Lock bit
        T55xxWriteBit(0);
 
@@ -1189,7 +1121,7 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMod
        // Now perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
        // so wait a little more)
        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
        SpinDelay(20);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 }
@@ -1197,27 +1129,17 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMod
 // Read one card block in page 0
 void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
 {
-       uint8_t *dest = (uint8_t *)BigBuf;
-       int m=0, i=0;
-  
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       m = sizeof(BigBuf);
-  // Clear destination buffer before sending the command
-       memset(dest, 128, m);
-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-  
-       LED_D_ON();
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-  
-       // Give it a bit of time for the resonant antenna to settle.
-       // And for the tag to fully power up
-       SpinDelay(150);
-  
-       // Now start writting
+       uint8_t *dest =  mifare_get_bigbufptr();
+       uint16_t bufferlength = T55xx_SAMPLES_SIZE;
+       uint32_t i = 0;
+
+       // Clear destination buffer before sending the command  0x80 = average.
+       memset(dest, 0x80, bufferlength);
+
+       // Set up FPGA, 125kHz
+       // Wait for config.. (192+8190xPOW)x8 == 67ms
+       LFSetupFPGAForADC(0, true);
+
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        SpinDelayUs(START_GAP);
   
@@ -1235,54 +1157,40 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
        for (i = 0x04; i != 0; i >>= 1)
                T55xxWriteBit(Block & i);
   
-  // Turn field on to read the response
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+       // Turn field on to read the response
+       TurnReadLFOn();
   
        // Now do the acquisition
        i = 0;
        for(;;) {
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
                        AT91C_BASE_SSC->SSC_THR = 0x43;
+                       LED_D_ON();
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       // we don't care about actual value, only if it's more or less than a
-                       // threshold essentially we capture zero crossings for later analysis
-      //                       if(dest[i] < 127) dest[i] = 0; else dest[i] = 1;
-                       i++;
-                       if (i >= m) break;
+                       ++i;
+                       LED_D_OFF();
+                       if (i > bufferlength) break;
                }
        }
-  
-  FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+       cmd_send(CMD_ACK,0,0,0,0,0);
+    FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        LED_D_OFF();
-       DbpString("DONE!");
 }
 
 // Read card traceability data (page 1)
 void T55xxReadTrace(void){
-       uint8_t *dest = (uint8_t *)BigBuf;
-       int m=0, i=0;
-  
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       m = sizeof(BigBuf);
-  // Clear destination buffer before sending the command
-       memset(dest, 128, m);
-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-  
-       LED_D_ON();
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+       uint8_t *dest =  mifare_get_bigbufptr();
+       uint16_t bufferlength = T55xx_SAMPLES_SIZE;
+       int i=0;
+       
+       // Clear destination buffer before sending the command 0x80 = average
+       memset(dest, 0x80, bufferlength);  
   
-       // Give it a bit of time for the resonant antenna to settle.
-       // And for the tag to fully power up
-       SpinDelay(150);
+       LFSetupFPGAForADC(0, true);
   
-       // Now start writting
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        SpinDelayUs(START_GAP);
   
@@ -1290,26 +1198,35 @@ void T55xxReadTrace(void){
        T55xxWriteBit(1);
        T55xxWriteBit(1); //Page 1
   
-  // Turn field on to read the response
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+       // Turn field on to read the response
+       TurnReadLFOn();
   
        // Now do the acquisition
-       i = 0;
        for(;;) {
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
                        AT91C_BASE_SSC->SSC_THR = 0x43;
+                       LED_D_ON();
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       i++;
-                       if (i >= m) break;
+                       ++i;
+                       LED_D_OFF();
+               
+                       if (i >= bufferlength) break;
                }
        }
   
-  FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+       cmd_send(CMD_ACK,0,0,0,0,0);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        LED_D_OFF();
-       DbpString("DONE!");
+}
+
+void TurnReadLFOn(){
+       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+       // Give it a bit of time for the resonant antenna to settle.
+       //SpinDelay(30);
+       SpinDelayUs(8*150);
 }
 
 /*-------------- Cloning routines -----------*/
@@ -1425,7 +1342,7 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT)
   }
   
        // Config for HID (RF/50, FSK2a, Maxblock=3 for short/6 for long)
-       T55xxWriteBlock(T55x7_BITRATE_RF_50    |
+       T55xxWriteBlock(T55x7_BITRATE_RF_50  |
                   T55x7_MODULATION_FSK2a |
                   last_block << T55x7_MAXBLOCK_SHIFT,
                   0,0,0);
@@ -1568,7 +1485,6 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
 // Clone Indala 64-bit tag by UID to T55x7
 void CopyIndala64toT55x7(int hi, int lo)
 {
-
        //Program the 2 data blocks for supplied 64bit UID
        // and the block 0 for Indala64 format
        T55xxWriteBlock(hi,1,0,0);
@@ -1579,15 +1495,13 @@ void CopyIndala64toT55x7(int hi, int lo)
                        2 << T55x7_MAXBLOCK_SHIFT,
                        0, 0, 0);
        //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=2;Inverse data)
-//     T5567WriteBlock(0x603E1042,0);
+       //      T5567WriteBlock(0x603E1042,0);
 
        DbpString("DONE!");
-
 }      
 
 void CopyIndala224toT55x7(int uid1, int uid2, int uid3, int uid4, int uid5, int uid6, int uid7)
 {
-
        //Program the 7 data blocks for supplied 224bit UID
        // and the block 0 for Indala224 format
        T55xxWriteBlock(uid1,1,0,0);
@@ -1603,10 +1517,9 @@ void CopyIndala224toT55x7(int uid1, int uid2, int uid3, int uid4, int uid5, int
                        7 << T55x7_MAXBLOCK_SHIFT,
                        0,0,0);
        //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=7;Inverse data)
-//     T5567WriteBlock(0x603E10E2,0);
+       //      T5567WriteBlock(0x603E10E2,0);
 
        DbpString("DONE!");
-
 }
 
 
@@ -1753,7 +1666,6 @@ int IsBlock1PCF7931(uint8_t *Block) {
        
        return 0;
 }
-
 #define ALLOC 16
 
 void ReadPCF7931() {
@@ -1983,7 +1895,7 @@ void SendForward(uint8_t fwd_bit_count) {
   //Field on
   FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
   FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-  FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+  FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
   
   // Give it a bit of time for the resonant antenna to settle.
   // And for the tag to fully power up
@@ -1995,7 +1907,7 @@ void SendForward(uint8_t fwd_bit_count) {
   FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
   SpinDelayUs(55*8); //55 cycles off (8us each)for 4305
   FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-  FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);//field on
+  FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
   SpinDelayUs(16*8); //16 cycles on (8us each)
   
   // now start writting
@@ -2007,12 +1919,13 @@ void SendForward(uint8_t fwd_bit_count) {
       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
       SpinDelayUs(23*8); //16-4 cycles off (8us each)
       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-      FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);//field on
+      FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
       SpinDelayUs(9*8); //16 cycles on (8us each)
     }
   }
 }
 
+
 void EM4xLogin(uint32_t Password) {
   
   uint8_t fwd_bit_count;
@@ -2030,41 +1943,48 @@ void EM4xLogin(uint32_t Password) {
 
 void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
   
-  uint8_t fwd_bit_count;
-  uint8_t *dest = (uint8_t *)BigBuf;
-  int m=0, i=0;
+       uint8_t *dest =  mifare_get_bigbufptr();
+       uint16_t bufferlength = 12000;
+       uint32_t i = 0;
+
+       // Clear destination buffer before sending the command  0x80 = average.
+       memset(dest, 0x80, bufferlength);
+       
+       uint8_t fwd_bit_count;
   
-  //If password mode do login
-  if (PwdMode == 1) EM4xLogin(Pwd);
+       //If password mode do login
+       if (PwdMode == 1) EM4xLogin(Pwd);
   
-  forward_ptr = forwardLink_data;
-  fwd_bit_count = Prepare_Cmd( FWD_CMD_READ );
-  fwd_bit_count += Prepare_Addr( Address );
+       forward_ptr = forwardLink_data;
+       fwd_bit_count = Prepare_Cmd( FWD_CMD_READ );
+       fwd_bit_count += Prepare_Addr( Address );
   
-  m = sizeof(BigBuf);
-  // Clear destination buffer before sending the command
-  memset(dest, 128, m);
-  // Connect the A/D to the peak-detected low-frequency path.
-  SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-  // Now set up the SSC to get the ADC samples that are now streaming at us.
-  FpgaSetupSsc();
+       // Connect the A/D to the peak-detected low-frequency path.
+       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
+       // Now set up the SSC to get the ADC samples that are now streaming at us.
+       FpgaSetupSsc();
   
-  SendForward(fwd_bit_count);
+       SendForward(fwd_bit_count);
   
-  // Now do the acquisition
-  i = 0;
-  for(;;) {
-    if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
-      AT91C_BASE_SSC->SSC_THR = 0x43;
-    }
-    if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
-      dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-      i++;
-      if (i >= m) break;
-    }
-  }
-  FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
-  LED_D_OFF();
+       // // Turn field on to read the response
+       // TurnReadLFOn();
+       
+       // Now do the acquisition
+       i = 0;
+       for(;;) {
+               if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
+                       AT91C_BASE_SSC->SSC_THR = 0x43;
+               }
+               if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
+                       dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+                       ++i;
+                       if (i >= bufferlength) break;
+               }
+       }
+  
+       cmd_send(CMD_ACK,0,0,0,0,0);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+       LED_D_OFF();
 }
 
 void EM4xWriteWord(uint32_t Data, uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
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