Merge branch 'master' of https://github.com/iceman1001/proxmark3

[proxmark3-svn] / armsrc / lfops.c

diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index e45b55fcb22767111a76ac54c99ea7470b3b51e2..ab86f9311cf49d911c658d1ba29f16101a5068a7 100644 (file)
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -16,65 +16,70 @@
 #include "string.h"
 #include "lfdemod.h"
 #include "lfsampling.h"
 #include "string.h"
 #include "lfdemod.h"
 #include "lfsampling.h"

-#include "usb_cdc.h"
+#include "protocols.h"
+#include "usb_cdc.h" // for usb_poll_validate_length

 
 

+#ifndef SHORT_COIL
+# define SHORT_COIL()  LOW(GPIO_SSC_DOUT)
+#endif
+#ifndef OPEN_COIL
+# define OPEN_COIL()   HIGH(GPIO_SSC_DOUT)
+#endif

 
 /**
  * Function to do a modulation and then get samples.
  * @param delay_off
 
 /**
  * Function to do a modulation and then get samples.
  * @param delay_off

- * @param period_0
- * @param period_1
+ * @param periods  0xFFFF0000 is period_0,  0x0000FFFF is period_1
+ * @param useHighFreg

  * @param command
  */
  * @param command
  */

-void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, uint8_t *command)
+void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t periods, uint32_t useHighFreq, uint8_t *command)

 {
 {

+       /* Make sure the tag is reset */
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       SpinDelay(200);

 
 

-       int divisor_used = 95; // 125 KHz
-       // see if 'h' was specified
-
-       if (command[strlen((char *) command) - 1] == 'h')
-               divisor_used = 88; // 134.8 KHz
-
+       uint16_t period_0 =  periods >> 16;
+       uint16_t period_1 =  periods & 0xFFFF;
+       
+       // 95 == 125 KHz  88 == 124.8 KHz
+       int divisor_used = (useHighFreq) ? 88 : 95;

        sample_config sc = { 0,0,1, divisor_used, 0};
        setSamplingConfig(&sc);
 
        sample_config sc = { 0,0,1, divisor_used, 0};
        setSamplingConfig(&sc);
 

-       /* Make sure the tag is reset */
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       SpinDelay(2500);
+       //clear read buffer
+       BigBuf_Clear_keep_EM();

 
        LFSetupFPGAForADC(sc.divisor, 1);
 
        // And a little more time for the tag to fully power up
 
        LFSetupFPGAForADC(sc.divisor, 1);
 
        // And a little more time for the tag to fully power up

-       SpinDelay(2000);
+       SpinDelay(50);

 
        // now modulate the reader field
        while(*command != '\0' && *command != ' ') {
                FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
                LED_D_OFF();
 
        // now modulate the reader field
        while(*command != '\0' && *command != ' ') {
                FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
                LED_D_OFF();

-               SpinDelayUs(delay_off);
+               WaitUS(delay_off);

                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
 
                FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
                LED_D_ON();
                if(*(command++) == '0')
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
 
                FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
                LED_D_ON();
                if(*(command++) == '0')

-                       SpinDelayUs(period_0);
+                       WaitUS(period_0);

                else
                else

-                       SpinDelayUs(period_1);
+                       WaitUS(period_1);

        }
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LED_D_OFF();
        }
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LED_D_OFF();

-       SpinDelayUs(delay_off);
+       WaitUS(delay_off);

        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);

-

        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // now do the read
        DoAcquisition_config(false);
 }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // now do the read
        DoAcquisition_config(false);
 }
 

-
-

 /* blank r/w tag data stream
 ...0000000000000000 01111111
 1010101010101010101010101010101010101010101010101010101010101010
 /* blank r/w tag data stream
 ...0000000000000000 01111111
 1010101010101010101010101010101010101010101010101010101010101010


@@ -90,9 +95,9 @@ void ReadTItag(void)
        // when we read a TI tag we sample the zerocross line at 2Mhz
        // TI tags modulate a 1 as 16 cycles of 123.2Khz
        // TI tags modulate a 0 as 16 cycles of 134.2Khz
        // when we read a TI tag we sample the zerocross line at 2Mhz
        // TI tags modulate a 1 as 16 cycles of 123.2Khz
        // TI tags modulate a 0 as 16 cycles of 134.2Khz

- #define FSAMPLE 2000000
- #define FREQLO 123200
- #define FREQHI 134200
+       #define FSAMPLE 2000000
+       #define FREQLO 123200
+       #define FREQHI 134200

 
        signed char *dest = (signed char *)BigBuf_get_addr();
        uint16_t n = BigBuf_max_traceLen();
 
        signed char *dest = (signed char *)BigBuf_get_addr();
        uint16_t n = BigBuf_max_traceLen();


@@ -204,8 +209,7 @@ void ReadTItag(void)
                crc = update_crc16(crc, (shift1>>16)&0xff);
                crc = update_crc16(crc, (shift1>>24)&0xff);
 
                crc = update_crc16(crc, (shift1>>16)&0xff);
                crc = update_crc16(crc, (shift1>>24)&0xff);
 

-               Dbprintf("Info: Tag data: %x%08x, crc=%x",
-                                (unsigned int)shift1, (unsigned int)shift0, (unsigned int)shift2 & 0xFFFF);
+               Dbprintf("Info: Tag data: %x%08x, crc=%x", (unsigned int)shift1, (unsigned int)shift0, (unsigned int)shift2 & 0xFFFF);

                if (crc != (shift2&0xffff)) {
                        Dbprintf("Error: CRC mismatch, expected %x", (unsigned int)crc);
                } else {
                if (crc != (shift2&0xffff)) {
                        Dbprintf("Error: CRC mismatch, expected %x", (unsigned int)crc);
                } else {


@@ -221,20 +225,20 @@ void WriteTIbyte(uint8_t b)
        // modulate 8 bits out to the antenna
        for (i=0; i<8; i++)
        {
        // modulate 8 bits out to the antenna
        for (i=0; i<8; i++)
        {

-               if (b&(1<<i)) {
-                       // stop modulating antenna
+               if ( b & ( 1 << i ) ) {
+                       // stop modulating antenna 1ms

                        LOW(GPIO_SSC_DOUT);
                        LOW(GPIO_SSC_DOUT);

-                       SpinDelayUs(1000);
-                       // modulate antenna
-                       HIGH(GPIO_SSC_DOUT);
-                       SpinDelayUs(1000);
+                       WaitUS(1000);
+                       // modulate antenna 1ms
+                       HIGH(GPIO_SSC_DOUT); 
+                       WaitUS(1000);

                } else {
                } else {

-                       // stop modulating antenna
+                       // stop modulating antenna 1ms

                        LOW(GPIO_SSC_DOUT);
                        LOW(GPIO_SSC_DOUT);

-                       SpinDelayUs(300);
-                       // modulate antenna
+                       WaitUS(300);
+                       // modulate antenna 1m

                        HIGH(GPIO_SSC_DOUT);
                        HIGH(GPIO_SSC_DOUT);

-                       SpinDelayUs(1700);
+                       WaitUS(1700);

                }
        }
 }
                }
        }
 }


@@ -244,11 +248,13 @@ void AcquireTiType(void)
        int i, j, n;
        // tag transmission is <20ms, sampling at 2M gives us 40K samples max
        // each sample is 1 bit stuffed into a uint32_t so we need 1250 uint32_t
        int i, j, n;
        // tag transmission is <20ms, sampling at 2M gives us 40K samples max
        // each sample is 1 bit stuffed into a uint32_t so we need 1250 uint32_t

- #define TIBUFLEN 1250
+       #define TIBUFLEN 1250

 
        // clear buffer
 
        // clear buffer

-       uint32_t *BigBuf = (uint32_t *)BigBuf_get_addr();
-       memset(BigBuf,0,BigBuf_max_traceLen()/sizeof(uint32_t));
+       uint32_t *buf = (uint32_t *)BigBuf_get_addr();
+
+       //clear buffer now so it does not interfere with timing later
+       BigBuf_Clear_ext(false);

 
        // Set up the synchronous serial port
        AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DIN;
 
        // Set up the synchronous serial port
        AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DIN;


@@ -269,7 +275,7 @@ void AcquireTiType(void)
        AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(32) | AT91C_SSC_MSBF;
        AT91C_BASE_SSC->SSC_TCMR = 0;
        AT91C_BASE_SSC->SSC_TFMR = 0;
        AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(32) | AT91C_SSC_MSBF;
        AT91C_BASE_SSC->SSC_TCMR = 0;
        AT91C_BASE_SSC->SSC_TFMR = 0;

-
+       // iceman, FpgaSetupSsc() ?? the code above? can it be replaced?

        LED_D_ON();
 
        // modulate antenna
        LED_D_ON();
 
        // modulate antenna


@@ -286,7 +292,7 @@ void AcquireTiType(void)
        i = 0;
        for(;;) {
                if(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
        i = 0;
        for(;;) {
                if(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {

-                       BigBuf[i] = AT91C_BASE_SSC->SSC_RHR;    // store 32 bit values in buffer
+                       buf[i] = AT91C_BASE_SSC->SSC_RHR;       // store 32 bit values in buffer

                        i++; if(i >= TIBUFLEN) break;
                }
                WDT_HIT();
                        i++; if(i >= TIBUFLEN) break;
                }
                WDT_HIT();


@@ -297,11 +303,12 @@ void AcquireTiType(void)
        AT91C_BASE_PIOA->PIO_ASR = GPIO_SSC_DIN | GPIO_SSC_DOUT;
 
        char *dest = (char *)BigBuf_get_addr();
        AT91C_BASE_PIOA->PIO_ASR = GPIO_SSC_DIN | GPIO_SSC_DOUT;
 
        char *dest = (char *)BigBuf_get_addr();

-       n = TIBUFLEN*32;
+       n = TIBUFLEN * 32;
+       

        // unpack buffer
        // unpack buffer

-       for (i=TIBUFLEN-1; i>=0; i--) {
-               for (j=0; j<32; j++) {
-                       if(BigBuf[i] & (1 << j)) {
+       for (i = TIBUFLEN-1; i >= 0; i--) {
+               for (j = 0; j < 32; j++) {
+                       if(buf[i] & (1 << j)) {

                                dest[--n] = 1;
                        } else {
                                dest[--n] = -1;
                                dest[--n] = 1;
                        } else {
                                dest[--n] = -1;


@@ -326,8 +333,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
                crc = update_crc16(crc, (idhi>>16)&0xff);
                crc = update_crc16(crc, (idhi>>24)&0xff);
        }
                crc = update_crc16(crc, (idhi>>16)&0xff);
                crc = update_crc16(crc, (idhi>>24)&0xff);
        }

-       Dbprintf("Writing to tag: %x%08x, crc=%x",
-                       (unsigned int) idhi, (unsigned int) idlo, crc);
+       Dbprintf("Writing to tag: %x%08x, crc=%x",      (unsigned int) idhi, (unsigned int) idlo, crc);

 
        // TI tags charge at 134.2Khz
        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
 
        // TI tags charge at 134.2Khz
        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz


@@ -349,7 +355,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
        // start by writing 0xBB (keyword) and 0xEB (password)
        // then write 80 bits of data (or 64 bit data + 16 bit crc if you prefer)
        // finally end with 0x0300 (write frame)
        // start by writing 0xBB (keyword) and 0xEB (password)
        // then write 80 bits of data (or 64 bit data + 16 bit crc if you prefer)
        // finally end with 0x0300 (write frame)

-       // all data is sent lsb firts
+       // all data is sent lsb first

        // finish with 15ms programming time
 
        // modulate antenna
        // finish with 15ms programming time
 
        // modulate antenna


@@ -379,61 +385,59 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
        AcquireTiType();
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        AcquireTiType();
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       DbpString("Now use tiread to check");
+       DbpString("Now use `lf ti read` to check");

 }
 
 void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 {
 }
 
 void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 {

-       int i;
+       int i = 0;

        uint8_t *tab = BigBuf_get_addr();
 
        uint8_t *tab = BigBuf_get_addr();
 

-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT | FPGA_LF_EDGE_DETECT_READER_FIELD);

 
        AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK;
 
        AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK;

-

        AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
        AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK;
 
        AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
        AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK;
 

- #define SHORT_COIL()  LOW(GPIO_SSC_DOUT)
- #define OPEN_COIL()           HIGH(GPIO_SSC_DOUT)
-
-       i = 0;

        for(;;) {
        for(;;) {

+               WDT_HIT();
+
+               if (ledcontrol) LED_D_ON();
+                               

                //wait until SSC_CLK goes HIGH
                while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
                //wait until SSC_CLK goes HIGH
                while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {

-                       if(BUTTON_PRESS() || usb_poll()) {
-                               DbpString("Stopped");
-                               return;
-                       }

                        WDT_HIT();
                        WDT_HIT();

+                       if ( usb_poll_validate_length() || BUTTON_PRESS() ) {
+                               FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+                               LED_D_OFF();
+                               return;                         
+                       }

                }
                }

-               if (ledcontrol)
-                       LED_D_ON();
-
+               

                if(tab[i])
                        OPEN_COIL();
                else
                        SHORT_COIL();
 
                if(tab[i])
                        OPEN_COIL();
                else
                        SHORT_COIL();
 

-               if (ledcontrol)
-                       LED_D_OFF();
+               if (ledcontrol) LED_D_OFF();
+               

                //wait until SSC_CLK goes LOW
                while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {
                //wait until SSC_CLK goes LOW
                while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {

-                       if(BUTTON_PRESS()) {
-                               DbpString("Stopped");
-                               return;
-                       }

                        WDT_HIT();
                        WDT_HIT();

+                       if ( usb_poll_validate_length() || BUTTON_PRESS() ) {
+                               FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+                               LED_D_OFF();
+                               return;                         
+                       }

                }
 
                i++;
                if(i == period) {
                }
 
                i++;
                if(i == period) {

-

                        i = 0;
                        if (gap) {
                        i = 0;
                        if (gap) {

+                               WDT_HIT();

                                SHORT_COIL();
                                SHORT_COIL();

-                               SpinDelayUs(gap);
+                               WaitUS(gap);

                        }
                }
        }
                        }
                }
        }


@@ -527,7 +531,10 @@ static void fcAll(uint8_t fc, int *n, uint8_t clock, uint16_t *modCnt)
 // simulate a HID tag until the button is pressed
 void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
 {
 // simulate a HID tag until the button is pressed
 void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
 {

-       int n=0, i=0;
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+       set_tracing(FALSE);
+               
+       int n = 0, i = 0;

        /*
         HID tag bitstream format
         The tag contains a 44bit unique code. This is sent out MSB first in sets of 4 bits
        /*
         HID tag bitstream format
         The tag contains a 44bit unique code. This is sent out MSB first in sets of 4 bits


@@ -538,7 +545,7 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
         nor 1 bits, they are special patterns (a = set of 12 fc8 and b = set of 10 fc10)
        */
 
         nor 1 bits, they are special patterns (a = set of 12 fc8 and b = set of 10 fc10)
        */
 

-       if (hi>0xFFF) {
+       if (hi > 0xFFF) {

                DbpString("Tags can only have 44 bits. - USE lf simfsk for larger tags");
                return;
        }
                DbpString("Tags can only have 44 bits. - USE lf simfsk for larger tags");
                return;
        }


@@ -570,13 +577,11 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
                        fc(8,  &n); fc(10, &n);         // high-low transition
                }
        }
                        fc(8,  &n); fc(10, &n);         // high-low transition
                }
        }

-
-       if (ledcontrol)
-               LED_A_ON();
+       WDT_HIT();
+       
+       if (ledcontrol) LED_A_ON();

        SimulateTagLowFrequency(n, 0, ledcontrol);
        SimulateTagLowFrequency(n, 0, ledcontrol);

-
-       if (ledcontrol)
-               LED_A_OFF();
+       if (ledcontrol) LED_A_OFF();

 }
 
 // prepare a waveform pattern in the buffer based on the ID given then
 }
 
 // prepare a waveform pattern in the buffer based on the ID given then


@@ -584,8 +589,14 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
 // arg1 contains fcHigh and fcLow, arg2 contains invert and clock
 void CmdFSKsimTAG(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
 {
 // arg1 contains fcHigh and fcLow, arg2 contains invert and clock
 void CmdFSKsimTAG(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
 {

-       int ledcontrol=1;
-       int n=0, i=0;
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+
+       // free eventually allocated BigBuf memory
+       BigBuf_free(); BigBuf_Clear_ext(false);
+       clear_trace();
+       set_tracing(FALSE);
+       
+       int ledcontrol = 1, n = 0, i = 0;

        uint8_t fcHigh = arg1 >> 8;
        uint8_t fcLow = arg1 & 0xFF;
        uint16_t modCnt = 0;
        uint8_t fcHigh = arg1 >> 8;
        uint8_t fcLow = arg1 & 0xFF;
        uint16_t modCnt = 0;


@@ -593,27 +604,19 @@ void CmdFSKsimTAG(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
        uint8_t invert = (arg2 >> 8) & 1;
 
        for (i=0; i<size; i++){
        uint8_t invert = (arg2 >> 8) & 1;
 
        for (i=0; i<size; i++){

-               if (BitStream[i] == invert){
+               
+               if (BitStream[i] == invert)

                        fcAll(fcLow, &n, clk, &modCnt);
                        fcAll(fcLow, &n, clk, &modCnt);

-               } else {
+               else

                        fcAll(fcHigh, &n, clk, &modCnt);
                        fcAll(fcHigh, &n, clk, &modCnt);

-               }

        }
        }

-       Dbprintf("Simulating with fcHigh: %d, fcLow: %d, clk: %d, invert: %d, n: %d",fcHigh, fcLow, clk, invert, n);
-       /*Dbprintf("DEBUG: First 32:");
-       uint8_t *dest = BigBuf_get_addr();
-       i=0;
-       Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
-       i+=16;
-       Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
-       */
-       if (ledcontrol)
-               LED_A_ON();
+       WDT_HIT();
+       
+       Dbprintf("Simulating with fcHigh: %d, fcLow: %d, clk: %d, invert: %d, n: %d", fcHigh, fcLow, clk, invert, n);

 
 

+       if (ledcontrol) LED_A_ON();

        SimulateTagLowFrequency(n, 0, ledcontrol);
        SimulateTagLowFrequency(n, 0, ledcontrol);

-
-       if (ledcontrol)
-               LED_A_OFF();
+       if (ledcontrol) LED_A_OFF();

 }
 
 // compose ask waveform for one bit(ASK)
 }
 
 // compose ask waveform for one bit(ASK)


@@ -642,25 +645,39 @@ static void biphaseSimBit(uint8_t c, int *n, uint8_t clock, uint8_t *phase)
                memset(dest+(*n), c ^ *phase, clock);
                *phase ^= 1;
        }
                memset(dest+(*n), c ^ *phase, clock);
                *phase ^= 1;
        }

+       *n += clock;
+}

 
 

+static void stAskSimBit(int *n, uint8_t clock) {
+       uint8_t *dest = BigBuf_get_addr();
+       uint8_t halfClk = clock/2;
+       //ST = .5 high .5 low 1.5 high .5 low 1 high    
+       memset(dest+(*n), 1, halfClk);
+       memset(dest+(*n) + halfClk, 0, halfClk);
+       memset(dest+(*n) + clock, 1, clock + halfClk);
+       memset(dest+(*n) + clock*2 + halfClk, 0, halfClk);
+       memset(dest+(*n) + clock*3, 1, clock);
+       *n += clock*4;

 }
 
 // args clock, ask/man or askraw, invert, transmission separator
 void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
 {
 }
 
 // args clock, ask/man or askraw, invert, transmission separator
 void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
 {

-       int ledcontrol = 1;
-       int n=0, i=0;
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);   
+       set_tracing(FALSE);
+       
+       int ledcontrol = 1, n = 0, i = 0;

        uint8_t clk = (arg1 >> 8) & 0xFF;
        uint8_t clk = (arg1 >> 8) & 0xFF;

-       uint8_t encoding = arg1 & 1;
+       uint8_t encoding = arg1 & 0xFF;

        uint8_t separator = arg2 & 1;
        uint8_t invert = (arg2 >> 8) & 1;
 
        uint8_t separator = arg2 & 1;
        uint8_t invert = (arg2 >> 8) & 1;
 

-       if (encoding==2){  //biphase
-               uint8_t phase=0;
+       if (encoding == 2){  //biphase
+               uint8_t phase = 0;

                for (i=0; i<size; i++){
                        biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
                }
                for (i=0; i<size; i++){
                        biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
                }

-               if (BitStream[0]==BitStream[size-1]){ //run a second set inverted to keep phase in check
+               if (phase == 1) { //run a second set inverted to keep phase in check

                        for (i=0; i<size; i++){
                                biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
                        }
                        for (i=0; i<size; i++){
                                biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
                        }


@@ -675,25 +692,18 @@ void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
                        }
                }
        }
                        }
                }
        }

-       
-       if (separator==1) Dbprintf("sorry but separator option not yet available"); 
+       if (separator==1 && encoding == 1)
+               stAskSimBit(&n, clk);
+       else if (separator==1)
+               Dbprintf("sorry but separator option not yet available");

 
 

-       Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d",clk, invert, encoding, separator, n);
-       //DEBUG
-       //Dbprintf("First 32:");
-       //uint8_t *dest = BigBuf_get_addr();
-       //i=0;
-       //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
-       //i+=16;
-       //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
-
-       if (ledcontrol)
-               LED_A_ON();
+       WDT_HIT();

        
        

-       SimulateTagLowFrequency(n, 0, ledcontrol);
+       Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d",clk, invert, encoding, separator, n);

 
 

-       if (ledcontrol)
-               LED_A_OFF();
+       if (ledcontrol) LED_A_ON();
+       SimulateTagLowFrequency(n, 0, ledcontrol);
+       if (ledcontrol) LED_A_OFF();

 }
 
 //carrier can be 2,4 or 8
 }
 
 //carrier can be 2,4 or 8


@@ -722,8 +732,10 @@ static void pskSimBit(uint8_t waveLen, int *n, uint8_t clk, uint8_t *curPhase, b
 // args clock, carrier, invert,
 void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
 {
 // args clock, carrier, invert,
 void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
 {

-       int ledcontrol=1;
-       int n=0, i=0;
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);   
+       set_tracing(FALSE);
+       
+       int ledcontrol = 1, n = 0, i = 0;

        uint8_t clk = arg1 >> 8;
        uint8_t carrier = arg1 & 0xFF;
        uint8_t invert = arg2 & 0xFF;
        uint8_t clk = arg1 >> 8;
        uint8_t carrier = arg1 & 0xFF;
        uint8_t invert = arg2 & 0xFF;


@@ -735,41 +747,36 @@ void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
                        pskSimBit(carrier, &n, clk, &curPhase, TRUE);
                }
        }
                        pskSimBit(carrier, &n, clk, &curPhase, TRUE);
                }
        }

+       
+       WDT_HIT();
+       

        Dbprintf("Simulating with Carrier: %d, clk: %d, invert: %d, n: %d",carrier, clk, invert, n);
        Dbprintf("Simulating with Carrier: %d, clk: %d, invert: %d, n: %d",carrier, clk, invert, n);

-       //Dbprintf("DEBUG: First 32:");
-       //uint8_t *dest = BigBuf_get_addr();
-       //i=0;
-       //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
-       //i+=16;
-       //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);

                   
                   

-       if (ledcontrol)
-               LED_A_ON();
+       if (ledcontrol) LED_A_ON();

        SimulateTagLowFrequency(n, 0, ledcontrol);
        SimulateTagLowFrequency(n, 0, ledcontrol);

-
-       if (ledcontrol)
-               LED_A_OFF();
+       if (ledcontrol) LED_A_OFF();

 }
 
 // loop to get raw HID waveform then FSK demodulate the TAG ID from it
 void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 {
        uint8_t *dest = BigBuf_get_addr();
 }
 
 // loop to get raw HID waveform then FSK demodulate the TAG ID from it
 void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 {
        uint8_t *dest = BigBuf_get_addr();

-       //const size_t sizeOfBigBuff = BigBuf_max_traceLen();
-       size_t size; 
+       size_t size = 0; 

        uint32_t hi2=0, hi=0, lo=0;
        int idx=0;
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        uint32_t hi2=0, hi=0, lo=0;
        int idx=0;
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 

-       while(!BUTTON_PRESS()) {
+       //clear read buffer
+       BigBuf_Clear_keep_EM();
+
+       while(!BUTTON_PRESS() && !usb_poll_validate_length()) {

 
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 
                DoAcquisition_default(-1,true);
                // FSK demodulator
 
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 
                DoAcquisition_default(-1,true);
                // FSK demodulator

-               //size = sizeOfBigBuff;  //variable size will change after demod so re initialize it before use

                size = 50*128*2; //big enough to catch 2 sequences of largest format
                idx = HIDdemodFSK(dest, &size, &hi2, &hi, &lo);
                
                size = 50*128*2; //big enough to catch 2 sequences of largest format
                idx = HIDdemodFSK(dest, &size, &hi2, &hi, &lo);
                


@@ -777,12 +784,16 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                        // go over previously decoded manchester data and decode into usable tag ID
                        if (hi2 != 0){ //extra large HID tags  88/192 bits
                                Dbprintf("TAG ID: %x%08x%08x (%d)",
                        // go over previously decoded manchester data and decode into usable tag ID
                        if (hi2 != 0){ //extra large HID tags  88/192 bits
                                Dbprintf("TAG ID: %x%08x%08x (%d)",

-                                 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
-                       }else {  //standard HID tags 44/96 bits
-                               //Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd
+                                 (unsigned int) hi2,
+                                 (unsigned int) hi,
+                                 (unsigned int) lo,
+                                 (unsigned int) (lo>>1) & 0xFFFF
+                                 );
+                       } else {  //standard HID tags 44/96 bits

                                uint8_t bitlen = 0;
                                uint32_t fc = 0;
                                uint32_t cardnum = 0;
                                uint8_t bitlen = 0;
                                uint32_t fc = 0;
                                uint32_t cardnum = 0;

+                               

                                if (((hi>>5)&1) == 1){//if bit 38 is set then < 37 bit format is used
                                        uint32_t lo2=0;
                                        lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
                                if (((hi>>5)&1) == 1){//if bit 38 is set then < 37 bit format is used
                                        uint32_t lo2=0;
                                        lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit


@@ -820,11 +831,13 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                                                fc = ((hi&0xF)<<12)|(lo>>20);
                                        }
                                }
                                                fc = ((hi&0xF)<<12)|(lo>>20);
                                        }
                                }

-                               //Dbprintf("TAG ID: %x%08x (%d)",
-                               // (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);

                                Dbprintf("TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
                                Dbprintf("TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",

-                                                (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
-                                                (unsigned int) bitlen, (unsigned int) fc, (unsigned int) cardnum);
+                                                (unsigned int) hi,
+                                                (unsigned int) lo,
+                                                (unsigned int) (lo>>1) & 0xFFFF,
+                                                (unsigned int) bitlen,
+                                                (unsigned int) fc,
+                                                (unsigned int) cardnum);

                        }
                        if (findone){
                                if (ledcontrol) LED_A_OFF();
                        }
                        if (findone){
                                if (ledcontrol) LED_A_OFF();


@@ -841,6 +854,109 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
        if (ledcontrol) LED_A_OFF();
 }
 
        if (ledcontrol) LED_A_OFF();
 }
 

+// loop to get raw HID waveform then FSK demodulate the TAG ID from it
+void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
+{
+       uint8_t *dest = BigBuf_get_addr();
+       size_t size; 
+       int idx=0;
+       //clear read buffer
+       BigBuf_Clear_keep_EM();
+       // Configure to go in 125Khz listen mode
+       LFSetupFPGAForADC(95, true);
+
+       while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
+
+               WDT_HIT();
+               if (ledcontrol) LED_A_ON();
+
+               DoAcquisition_default(-1,true);
+               // FSK demodulator
+               size = 50*128*2; //big enough to catch 2 sequences of largest format
+               idx = AWIDdemodFSK(dest, &size);
+               
+               if (idx<=0 || size!=96) continue;
+               // Index map
+               // 0            10            20            30              40            50              60
+               // |            |             |             |               |             |               |
+               // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
+               // -----------------------------------------------------------------------------
+               // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
+               // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
+               //          |---26 bit---|    |-----117----||-------------142-------------|
+               // b = format bit len, o = odd parity of last 3 bits
+               // f = facility code, c = card number
+               // w = wiegand parity
+               // (26 bit format shown)
+
+               //get raw ID before removing parities
+               uint32_t rawLo = bytebits_to_byte(dest+idx+64,32);
+               uint32_t rawHi = bytebits_to_byte(dest+idx+32,32);
+               uint32_t rawHi2 = bytebits_to_byte(dest+idx,32);
+
+               size = removeParity(dest, idx+8, 4, 1, 88);
+               if (size != 66) continue;
+
+               // Index map
+               // 0           10         20        30          40        50        60
+               // |           |          |         |           |         |         |
+               // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
+               // -----------------------------------------------------------------------------
+               // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
+               // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+               // |26 bit|   |-117--| |-----142------|
+                       //
+                       // 00110010 0 0000011111010000000000000001000100101000100001111 0 00000000 
+                       // bbbbbbbb w ffffffffffffffffccccccccccccccccccccccccccccccccc w xxxxxxxx
+                       // |50 bit|   |----4000------||-----------2248975-------------|                         
+                       //
+               // b = format bit len, o = odd parity of last 3 bits
+               // f = facility code, c = card number
+               // w = wiegand parity
+
+               uint32_t fc = 0;
+               uint32_t cardnum = 0;
+               uint32_t code1 = 0;
+               uint32_t code2 = 0;
+               uint8_t fmtLen = bytebits_to_byte(dest,8);
+                       switch(fmtLen) {
+                               case 26: 
+                                       fc = bytebits_to_byte(dest + 9, 8);
+                                       cardnum = bytebits_to_byte(dest + 17, 16);
+                                       code1 = bytebits_to_byte(dest + 8,fmtLen);
+                                       Dbprintf("AWID Found - BitLength: %d, FC: %d, Card: %u - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
+                                       break;
+                               case 50:
+                                       fc = bytebits_to_byte(dest + 9, 16);
+                                       cardnum = bytebits_to_byte(dest + 25, 32);
+                                       code1 = bytebits_to_byte(dest + 8, (fmtLen-32) );
+                                       code2 = bytebits_to_byte(dest + 8 + (fmtLen-32), 32);
+                                       Dbprintf("AWID Found - BitLength: %d, FC: %d, Card: %u - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, code2, rawHi2, rawHi, rawLo);
+                                       break;
+                               default:
+                                       if (fmtLen > 32 ) {
+                                               cardnum = bytebits_to_byte(dest+8+(fmtLen-17), 16);
+                                               code1 = bytebits_to_byte(dest+8,fmtLen-32);
+                                               code2 = bytebits_to_byte(dest+8+(fmtLen-32),32);
+                                               Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%u) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
+                                       } else {
+                                               cardnum = bytebits_to_byte(dest+8+(fmtLen-17), 16);
+                                               code1 = bytebits_to_byte(dest+8,fmtLen);
+                                               Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%u) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
+                                       }
+                                       break;          
+                       }
+                       if (findone){
+                               if (ledcontrol) LED_A_OFF();
+                               return;
+                       }
+               idx = 0;
+               WDT_HIT();
+       }
+       DbpString("Stopped");
+       if (ledcontrol) LED_A_OFF();
+}
+

 void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
 {
        uint8_t *dest = BigBuf_get_addr();
 void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
 {
        uint8_t *dest = BigBuf_get_addr();


@@ -849,10 +965,12 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
        int clk=0, invert=0, errCnt=0, maxErr=20;
        uint32_t hi=0;
        uint64_t lo=0;
        int clk=0, invert=0, errCnt=0, maxErr=20;
        uint32_t hi=0;
        uint64_t lo=0;

+       //clear read buffer
+       BigBuf_Clear_keep_EM();

        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 

-       while(!BUTTON_PRESS()) {
+       while(!BUTTON_PRESS() && !usb_poll_validate_length()) {

 
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 
                WDT_HIT();
                if (ledcontrol) LED_A_ON();


@@ -866,24 +984,24 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
 
                if (errCnt<0) continue;
        
 
                if (errCnt<0) continue;
        

-               errCnt = Em410xDecode(dest, &size, &idx, &hi, &lo);
-               if (errCnt){
-                       if (size>64){
-                               Dbprintf("EM XL TAG ID: %06x%08x%08x - (%05d_%03d_%08d)",
-                                 hi,
-                                 (uint32_t)(lo>>32),
-                                 (uint32_t)lo,
-                                 (uint32_t)(lo&0xFFFF),
-                                 (uint32_t)((lo>>16LL) & 0xFF),
-                                 (uint32_t)(lo & 0xFFFFFF));
-                       } else {
-                               Dbprintf("EM TAG ID: %02x%08x - (%05d_%03d_%08d)",
-                                 (uint32_t)(lo>>32),
-                                 (uint32_t)lo,
-                                 (uint32_t)(lo&0xFFFF),
-                                 (uint32_t)((lo>>16LL) & 0xFF),
-                                 (uint32_t)(lo & 0xFFFFFF));
-                       }
+                       errCnt = Em410xDecode(dest, &size, &idx, &hi, &lo);
+                       if (errCnt){
+                               if (size>64){
+                                       Dbprintf("EM XL TAG ID: %06x%08x%08x - (%05d_%03d_%08d)",
+                                         hi,
+                                         (uint32_t)(lo>>32),
+                                         (uint32_t)lo,
+                                         (uint32_t)(lo&0xFFFF),
+                                         (uint32_t)((lo>>16LL) & 0xFF),
+                                         (uint32_t)(lo & 0xFFFFFF));
+                               } else {
+                                       Dbprintf("EM TAG ID: %02x%08x - (%05d_%03d_%08d)",
+                                         (uint32_t)(lo>>32),
+                                         (uint32_t)lo,
+                                         (uint32_t)(lo&0xFFFF),
+                                         (uint32_t)((lo>>16LL) & 0xFF),
+                                         (uint32_t)(lo & 0xFFFFFF));
+                               }

 
                        if (findone){
                                if (ledcontrol) LED_A_OFF();
 
                        if (findone){
                                if (ledcontrol) LED_A_OFF();


@@ -908,10 +1026,16 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
        uint8_t version=0;
        uint8_t facilitycode=0;
        uint16_t number=0;
        uint8_t version=0;
        uint8_t facilitycode=0;
        uint16_t number=0;

+       uint8_t crc = 0;
+       uint16_t calccrc = 0;
+
+       //clear read buffer
+       BigBuf_Clear_keep_EM();
+       

        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 

-       while(!BUTTON_PRESS()) {
+       while(!BUTTON_PRESS() && !usb_poll_validate_length()) {

                WDT_HIT();
                if (ledcontrol) LED_A_ON();
                DoAcquisition_default(-1,true);
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
                DoAcquisition_default(-1,true);


@@ -919,45 +1043,61 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                WDT_HIT();
                idx = IOdemodFSK(dest, BigBuf_max_traceLen());
                if (idx<0) continue;
                WDT_HIT();
                idx = IOdemodFSK(dest, BigBuf_max_traceLen());
                if (idx<0) continue;

-               //valid tag found
-
-               //Index map
-               //0           10          20          30          40          50          60
-               //|           |           |           |           |           |           |
-               //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
-               //-----------------------------------------------------------------------------
-               //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
-               //
-               //XSF(version)facility:codeone+codetwo
-               //Handle the data
-               if(findone){ //only print binary if we are doing one
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx],   dest[idx+1],   dest[idx+2],dest[idx+3],dest[idx+4],dest[idx+5],dest[idx+6],dest[idx+7],dest[idx+8]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15],dest[idx+16],dest[idx+17]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23],dest[idx+24],dest[idx+25],dest[idx+26]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31],dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39],dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+45],dest[idx+46],dest[idx+47],dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d%d",dest[idx+54],dest[idx+55],dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]);
-               }
-               code = bytebits_to_byte(dest+idx,32);
-               code2 = bytebits_to_byte(dest+idx+32,32);
-               version = bytebits_to_byte(dest+idx+27,8); //14,4
-               facilitycode = bytebits_to_byte(dest+idx+18,8);
-               number = (bytebits_to_byte(dest+idx+36,8)<<8)|(bytebits_to_byte(dest+idx+45,8)); //36,9
-
-               Dbprintf("XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2);
-               // if we're only looking for one tag
-               if (findone){
-                       if (ledcontrol) LED_A_OFF();
-                       //LED_A_OFF();
-                       *high=code;
-                       *low=code2;
-                       return;
-               }
-               code=code2=0;
-               version=facilitycode=0;
-               number=0;
-               idx=0;
+                       //valid tag found
+
+                       //Index map
+                       //0           10          20          30          40          50          60
+                       //|           |           |           |           |           |           |
+                       //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
+                       //-----------------------------------------------------------------------------
+            //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 checksum 11
+                       //
+                       //Checksum:  
+                       //00000000 0 11110000 1 11100000 1 00000001 1 00000011 1 10110110 1 01110101 11
+                       //preamble      F0         E0         01         03         B6         75
+                       // How to calc checksum,
+                       // http://www.proxmark.org/forum/viewtopic.php?id=364&p=6
+                       //   F0 + E0 + 01 + 03 + B6 = 28A
+                       //   28A & FF = 8A
+                       //   FF - 8A = 75
+                       // Checksum: 0x75
+                       //XSF(version)facility:codeone+codetwo
+                       //Handle the data
+                       if(findone){ //only print binary if we are doing one
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx],   dest[idx+1],   dest[idx+2],dest[idx+3],dest[idx+4],dest[idx+5],dest[idx+6],dest[idx+7],dest[idx+8]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15],dest[idx+16],dest[idx+17]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23],dest[idx+24],dest[idx+25],dest[idx+26]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31],dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39],dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+45],dest[idx+46],dest[idx+47],dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d%d",dest[idx+54],dest[idx+55],dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]);
+                       }
+                       code = bytebits_to_byte(dest+idx,32);
+                       code2 = bytebits_to_byte(dest+idx+32,32);
+                       version = bytebits_to_byte(dest+idx+27,8); //14,4
+                       facilitycode = bytebits_to_byte(dest+idx+18,8);
+                       number = (bytebits_to_byte(dest+idx+36,8)<<8)|(bytebits_to_byte(dest+idx+45,8)); //36,9
+
+                       crc = bytebits_to_byte(dest+idx+54,8);
+                       for (uint8_t i=1; i<6; ++i)
+                               calccrc += bytebits_to_byte(dest+idx+9*i,8);
+                       calccrc &= 0xff;
+                       calccrc = 0xff - calccrc;
+                       
+                       char *crcStr = (crc == calccrc) ? "ok":"!crc";
+
+            Dbprintf("IO Prox XSF(%02d)%02x:%05d (%08x%08x)  [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
+                       // if we're only looking for one tag
+                       if (findone){
+                               if (ledcontrol) LED_A_OFF();
+                               *high=code;
+                               *low=code2;
+                               return;
+                       }
+                       code=code2=0;
+                       version=facilitycode=0;
+                       number=0;
+                       idx=0;

 
                WDT_HIT();
        }
 
                WDT_HIT();
        }


@@ -966,378 +1106,325 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 }
 
 /*------------------------------
 }
 
 /*------------------------------

- * T5555/T5557/T5567 routines
+ * T5555/T5557/T5567/T5577 routines

  *------------------------------
  *------------------------------

- */
-
-/* T55x7 configuration register definitions */
-#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_MODULATION_DIRECT                0
-#define T55x7_MODULATION_PSK1          0x00001000
-#define T55x7_MODULATION_PSK2          0x00002000
-#define T55x7_MODULATION_PSK3          0x00003000
-#define T55x7_MODULATION_FSK1          0x00004000
-#define T55x7_MODULATION_FSK2          0x00005000
-#define T55x7_MODULATION_FSK1a         0x00006000
-#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_100           0x00180000
-#define T55x7_BITRATE_RF_128           0x001C0000
-
-/* T5555 (Q5) configuration register definitions */
-#define T5555_ST_TERMINATOR            0x00000001
-#define T5555_MAXBLOCK_SHIFT           0x00000001
-#define T5555_MODULATION_MANCHESTER    0
-#define T5555_MODULATION_PSK1          0x00000010
-#define T5555_MODULATION_PSK2          0x00000020
-#define T5555_MODULATION_PSK3          0x00000030
-#define T5555_MODULATION_FSK1          0x00000040
-#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
-
-/*
- * Relevant times in microsecond
+ * NOTE: T55x7/T5555 configuration register definitions moved to protocols.h 
+ *
+ * Relevant communication times in microsecond

  * To compensate antenna falling times shorten the write times
  * and enlarge the gap ones.
  * To compensate antenna falling times shorten the write times
  * and enlarge the gap ones.

+ * Q5 tags seems to have issues when these values changes. 

  */
  */

-#define START_GAP 50*8 // 10 - 50fc 250
-#define WRITE_GAP 20*8 //    - 30fc 160
-#define WRITE_0   24*8 // 16 - 63fc 54fc 144
-#define WRITE_1   54*8 // 48 - 63fc 54fc 432 for T55x7; 448 for E5550 //400

 
 

-#define T55xx_SAMPLES_SIZE      12000 // 32 x 32 x 10  (32 bit times numofblock (7), times clock skip..)
+#define START_GAP 50*8 // was 250 // SPEC:  1*8 to 50*8 - typ 15*8 (or 15fc)
+#define WRITE_GAP 20*8 // was 160 // SPEC:  1*8 to 20*8 - typ 10*8 (or 10fc)
+#define WRITE_0   18*8 // was 144 // SPEC: 16*8 to 32*8 - typ 24*8 (or 24fc)
+#define WRITE_1   50*8 // was 400 // SPEC: 48*8 to 64*8 - typ 56*8 (or 56fc)  432 for T55x7; 448 for E5550
+#define READ_GAP  15*8 

 
 

-// Write one bit to card
-void T55xxWriteBit(int bit)
-{
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+//  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); 
+
+// Sam7s has several timers, we will use the source TIMER_CLOCK1 (aka AT91C_TC_CLKS_TIMER_DIV1_CLOCK)
+// TIMER_CLOCK1 = MCK/2, MCK is running at 48 MHz, Timer is running at 48/2 = 24 MHz
+// Hitag units (T0) have duration of 8 microseconds (us), which is 1/125000 per second (carrier)
+// T0 = TIMER_CLOCK1 / 125000 = 192
+// 1 Cycle = 8 microseconds(us)  == 1 field clock
+
+void TurnReadLFOn(int delay) {

        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);

-       if (bit == 0)
-               SpinDelayUs(WRITE_0);
+
+       // measure antenna strength.
+       //int adcval = ((MAX_ADC_LF_VOLTAGE * AvgAdc(ADC_CHAN_LF)) >> 10);
+
+       // Give it a bit of time for the resonant antenna to settle.
+       WaitUS(delay);
+}
+
+// Write one bit to card
+void T55xxWriteBit(int bit) {
+       if (!bit)
+               TurnReadLFOn(WRITE_0);

        else
        else

-               SpinDelayUs(WRITE_1);
+               TurnReadLFOn(WRITE_1);

        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelayUs(WRITE_GAP);
+       WaitUS(WRITE_GAP);
+}
+
+// Send T5577 reset command then read stream (see if we can identify the start of the stream)
+void T55xxResetRead(void) {
+       LED_A_ON();
+       //clear buffer now so it does not interfere with timing later
+       BigBuf_Clear_keep_EM();
+
+       // Set up FPGA, 125kHz
+       LFSetupFPGAForADC(95, true);
+
+       // Trigger T55x7 in mode.
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       WaitUS(START_GAP);
+
+       // reset tag - op code 00
+       T55xxWriteBit(0);
+       T55xxWriteBit(0);
+
+       // Turn field on to read the response
+       TurnReadLFOn(READ_GAP);
+
+       // Acquisition
+       doT55x7Acquisition(BigBuf_max_traceLen());
+
+       // Turn the field off
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+       cmd_send(CMD_ACK,0,0,0,0,0);    
+       LED_A_OFF();

 }
 
 // Write one card block in page 0, no lock
 }
 
 // Write one card block in page 0, no lock

-void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
-{
+void T55xxWriteBlockExt(uint32_t Data, uint8_t Block, uint32_t Pwd, uint8_t arg) {
+       LED_A_ON();
+       bool PwdMode = arg & 0x1;
+       uint8_t Page = (arg & 0x2)>>1;

        uint32_t i = 0;
 
        // Set up FPGA, 125kHz
        uint32_t i = 0;
 
        // Set up FPGA, 125kHz

-       // Wait for config.. (192+8190xPOW)x8 == 67ms
-       LFSetupFPGAForADC(0, true);
-
-       // Now start writting
+       LFSetupFPGAForADC(95, true);
+       
+       // Trigger T55x7 in mode.

        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelayUs(START_GAP);
+       WaitUS(START_GAP);

 
 

-       // Opcode
+       // Opcode 10

        T55xxWriteBit(1);
        T55xxWriteBit(1);

-       T55xxWriteBit(0); //Page 0
-       if (PwdMode == 1){
-               // Pwd
+       T55xxWriteBit(Page); //Page 0
+       if (PwdMode){
+               // Send Pwd

                for (i = 0x80000000; i != 0; i >>= 1)
                        T55xxWriteBit(Pwd & i);
        }
                for (i = 0x80000000; i != 0; i >>= 1)
                        T55xxWriteBit(Pwd & i);
        }

-       // Lock bit
+       // Send Lock bit

        T55xxWriteBit(0);
 
        T55xxWriteBit(0);
 

-       // Data
+       // Send Data

        for (i = 0x80000000; i != 0; i >>= 1)
                T55xxWriteBit(Data & i);
 
        for (i = 0x80000000; i != 0; i >>= 1)
                T55xxWriteBit(Data & i);
 

-       // Block
+       // Send Block number

        for (i = 0x04; i != 0; i >>= 1)
                T55xxWriteBit(Block & i);
 
        for (i = 0x04; i != 0; i >>= 1)
                T55xxWriteBit(Block & i);
 

-       // Now perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
+       // Perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,

        // so wait a little more)
        // so wait a little more)

-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
-       SpinDelay(20);
+       TurnReadLFOn(20 * 1000);
+               //could attempt to do a read to confirm write took
+               // as the tag should repeat back the new block 
+               // until it is reset, but to confirm it we would 
+               // need to know the current block 0 config mode
+       
+       // turn field off

        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

+       LED_A_OFF();

 }
 
 }
 

-void TurnReadLFOn(){
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
-       // Give it a bit of time for the resonant antenna to settle.
-       SpinDelayUs(8*150);
+// Write one card block in page 0, no lock
+void T55xxWriteBlock(uint32_t Data, uint8_t Block, uint32_t Pwd, uint8_t arg) {
+       T55xxWriteBlockExt(Data, Block, Pwd, arg);
+       cmd_send(CMD_ACK,0,0,0,0,0);

 }
 
 }
 

-
-// Read one card block in page 0
-void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
-{
+// Read one card block in page [page]
+void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
+       LED_A_ON();
+       bool PwdMode = arg0 & 0x1;
+       uint8_t Page = (arg0 & 0x2) >> 1;

        uint32_t i = 0;
        uint32_t i = 0;

-       uint8_t *dest = BigBuf_get_addr();
-       uint16_t bufferlength = BigBuf_max_traceLen();
-       if ( bufferlength > T55xx_SAMPLES_SIZE )
-               bufferlength = T55xx_SAMPLES_SIZE;
+       bool RegReadMode = (Block == 0xFF);
+       
+       //clear buffer now so it does not interfere with timing later
+       BigBuf_Clear_keep_EM();

 
 

-       // Clear destination buffer before sending the command
-       memset(dest, 0x80, bufferlength);
+       //make sure block is at max 7
+       Block &= 0x7;

 
 

-       // Set up FPGA, 125kHz
-       // Wait for config.. (192+8190xPOW)x8 == 67ms
-       LFSetupFPGAForADC(0, true);
+       // Set up FPGA, 125kHz to power up the tag
+       LFSetupFPGAForADC(95, true);
+       SpinDelay(3);
+       
+       // Trigger T55x7 Direct Access Mode with start gap

        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelayUs(START_GAP);
-
-       // Opcode
+       WaitUS(START_GAP);
+       
+       // Opcode 1[page]

        T55xxWriteBit(1);
        T55xxWriteBit(1);

-       T55xxWriteBit(0); //Page 0
-       if (PwdMode == 1){
-               // Pwd
+       T55xxWriteBit(Page); //Page 0
+
+       if (PwdMode){
+               // Send Pwd

                for (i = 0x80000000; i != 0; i >>= 1)
                        T55xxWriteBit(Pwd & i);
        }
                for (i = 0x80000000; i != 0; i >>= 1)
                        T55xxWriteBit(Pwd & i);
        }

-       // Lock bit
+       // Send a zero bit separation

        T55xxWriteBit(0);
        T55xxWriteBit(0);

-       // Block
-       for (i = 0x04; i != 0; i >>= 1)
-               T55xxWriteBit(Block & i);
+       
+       // Send Block number (if direct access mode)
+       if (!RegReadMode)
+               for (i = 0x04; i != 0; i >>= 1)
+                       T55xxWriteBit(Block & i);

 
        // Turn field on to read the response
 
        // 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++;
-                       LED_D_OFF();
-                       if (i >= bufferlength) break;
-               }
-       }
-
-       cmd_send(CMD_ACK,0,0,0,0,0);    
+       TurnReadLFOn(READ_GAP);
+       
+       // Acquisition
+       doT55x7Acquisition(12000);
+       
+       // Turn the field off

        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off

-       LED_D_OFF();
+       cmd_send(CMD_ACK,0,0,0,0,0);    
+       LED_A_OFF();

 }
 
 }
 

-// Read card traceability data (page 1)
-void T55xxReadTrace(void){
-       
+void T55xxWakeUp(uint32_t Pwd){
+       LED_B_ON();

        uint32_t i = 0;
        uint32_t i = 0;

-       uint8_t *dest = BigBuf_get_addr();
-       uint16_t bufferlength = BigBuf_max_traceLen();
-       if ( bufferlength > T55xx_SAMPLES_SIZE )
-               bufferlength= T55xx_SAMPLES_SIZE;
-
-       // Clear destination buffer before sending the command
-       memset(dest, 0x80, bufferlength);
-
-       LFSetupFPGAForADC(0, true);
+       
+       // Set up FPGA, 125kHz
+       LFSetupFPGAForADC(95, true);
+       
+       // Trigger T55x7 Direct Access Mode

        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelayUs(START_GAP);
-
-       // Opcode
+       WaitUS(START_GAP);
+       
+       // Opcode 10

        T55xxWriteBit(1);
        T55xxWriteBit(1);

-       T55xxWriteBit(1); //Page 1
-
-       // Turn field on to read the response
-       TurnReadLFOn();
-
-       // Now do the acquisition
-       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++;
-                       LED_D_OFF();
+       T55xxWriteBit(0); //Page 0

 
 

-                       if (i >= bufferlength) break;
-               }
-       }
+       // Send Pwd
+       for (i = 0x80000000; i != 0; i >>= 1)
+               T55xxWriteBit(Pwd & i);

 
 

-       cmd_send(CMD_ACK,0,0,0,0,0);
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
-       LED_D_OFF();
+       // Turn and leave field on to let the begin repeating transmission
+       TurnReadLFOn(20*1000);

 }
 
 /*-------------- Cloning routines -----------*/
 }
 
 /*-------------- Cloning routines -----------*/

+void WriteT55xx(uint32_t *blockdata, uint8_t startblock, uint8_t numblocks) {
+       // write last block first and config block last (if included)
+       for (uint8_t i = numblocks+startblock; i > startblock; i--)
+               T55xxWriteBlockExt(blockdata[i-1], i-1, 0, 0);
+}
+

 // Copy HID id to card and setup block 0 config
 // Copy HID id to card and setup block 0 config

-void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT)
-{
-       int data1=0, data2=0, data3=0, data4=0, data5=0, data6=0; //up to six blocks for long format
-       int last_block = 0;
+void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
+       uint32_t data[] = {0,0,0,0,0,0,0};
+       uint8_t last_block = 0;

 
        if (longFMT){
                // Ensure no more than 84 bits supplied
 
        if (longFMT){
                // Ensure no more than 84 bits supplied

-               if (hi2>0xFFFFF) {
+               if (hi2 > 0xFFFFF) {

                        DbpString("Tags can only have 84 bits.");
                        return;
                }
                // Build the 6 data blocks for supplied 84bit ID
                last_block = 6;
                        DbpString("Tags can only have 84 bits.");
                        return;
                }
                // Build the 6 data blocks for supplied 84bit ID
                last_block = 6;

-               data1 = 0x1D96A900; // load preamble (1D) & long format identifier (9E manchester encoded)
-               for (int i=0;i<4;i++) {
-                       if (hi2 & (1<<(19-i)))
-                               data1 |= (1<<(((3-i)*2)+1)); // 1 -> 10
-                       else
-                               data1 |= (1<<((3-i)*2)); // 0 -> 01
-               }
-
-               data2 = 0;
-               for (int i=0;i<16;i++) {
-                       if (hi2 & (1<<(15-i)))
-                               data2 |= (1<<(((15-i)*2)+1)); // 1 -> 10
-                       else
-                               data2 |= (1<<((15-i)*2)); // 0 -> 01
-               }
-
-               data3 = 0;
-               for (int i=0;i<16;i++) {
-                       if (hi & (1<<(31-i)))
-                               data3 |= (1<<(((15-i)*2)+1)); // 1 -> 10
-                       else
-                               data3 |= (1<<((15-i)*2)); // 0 -> 01
-               }
-
-               data4 = 0;
-               for (int i=0;i<16;i++) {
-                       if (hi & (1<<(15-i)))
-                               data4 |= (1<<(((15-i)*2)+1)); // 1 -> 10
-                       else
-                               data4 |= (1<<((15-i)*2)); // 0 -> 01
-               }
-
-               data5 = 0;
-               for (int i=0;i<16;i++) {
-                       if (lo & (1<<(31-i)))
-                               data5 |= (1<<(((15-i)*2)+1)); // 1 -> 10
-                       else
-                               data5 |= (1<<((15-i)*2)); // 0 -> 01
-               }
-
-               data6 = 0;
-               for (int i=0;i<16;i++) {
-                       if (lo & (1<<(15-i)))
-                               data6 |= (1<<(((15-i)*2)+1)); // 1 -> 10
-                       else
-                               data6 |= (1<<((15-i)*2)); // 0 -> 01
-               }
-       }
-       else {
+               // load preamble (1D) & long format identifier (9E manchester encoded)
+               data[1] = 0x1D96A900 | (manchesterEncode2Bytes((hi2 >> 16) & 0xF) & 0xFF);
+               // load raw id from hi2, hi, lo to data blocks (manchester encoded)
+               data[2] = manchesterEncode2Bytes(hi2 & 0xFFFF);
+               data[3] = manchesterEncode2Bytes(hi >> 16);
+               data[4] = manchesterEncode2Bytes(hi & 0xFFFF);
+               data[5] = manchesterEncode2Bytes(lo >> 16);
+               data[6] = manchesterEncode2Bytes(lo & 0xFFFF);
+       }       else {

                // Ensure no more than 44 bits supplied
                // Ensure no more than 44 bits supplied

-               if (hi>0xFFF) {
+               if (hi > 0xFFF) {

                        DbpString("Tags can only have 44 bits.");
                        return;
                }
                        DbpString("Tags can only have 44 bits.");
                        return;
                }

-

                // Build the 3 data blocks for supplied 44bit ID
                last_block = 3;
                // Build the 3 data blocks for supplied 44bit ID
                last_block = 3;

-
-               data1 = 0x1D000000; // load preamble
-
-               for (int i=0;i<12;i++) {
-                       if (hi & (1<<(11-i)))
-                               data1 |= (1<<(((11-i)*2)+1)); // 1 -> 10
-                       else
-                               data1 |= (1<<((11-i)*2)); // 0 -> 01
-               }
-
-               data2 = 0;
-               for (int i=0;i<16;i++) {
-                       if (lo & (1<<(31-i)))
-                               data2 |= (1<<(((15-i)*2)+1)); // 1 -> 10
-                       else
-                               data2 |= (1<<((15-i)*2)); // 0 -> 01
-               }
-
-               data3 = 0;
-               for (int i=0;i<16;i++) {
-                       if (lo & (1<<(15-i)))
-                               data3 |= (1<<(((15-i)*2)+1)); // 1 -> 10
-                       else
-                               data3 |= (1<<((15-i)*2)); // 0 -> 01
-               }
+               // load preamble
+               data[1] = 0x1D000000 | (manchesterEncode2Bytes(hi) & 0xFFFFFF);
+               data[2] = manchesterEncode2Bytes(lo >> 16);
+               data[3] = manchesterEncode2Bytes(lo & 0xFFFF);

        }
        }

+       // load chip config block
+       data[0] = T55x7_BITRATE_RF_50 | T55x7_MODULATION_FSK2a | last_block << T55x7_MAXBLOCK_SHIFT;
+
+       //TODO add selection of chip for Q5 or T55x7
+       // data[0] = (((50-2)/2)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | last_block << T5555_MAXBLOCK_SHIFT;

 
        LED_D_ON();
        // Program the data blocks for supplied ID
        // and the block 0 for HID format
 
        LED_D_ON();
        // Program the data blocks for supplied ID
        // and the block 0 for HID format

-       T55xxWriteBlock(data1,1,0,0);
-       T55xxWriteBlock(data2,2,0,0);
-       T55xxWriteBlock(data3,3,0,0);
-
-       if (longFMT) { // if long format there are 6 blocks
-               T55xxWriteBlock(data4,4,0,0);
-               T55xxWriteBlock(data5,5,0,0);
-               T55xxWriteBlock(data6,6,0,0);
-       }
-
-       // Config for HID (RF/50, FSK2a, Maxblock=3 for short/6 for long)
-       T55xxWriteBlock(T55x7_BITRATE_RF_50    |
-                                       T55x7_MODULATION_FSK2a |
-                                       last_block << T55x7_MAXBLOCK_SHIFT,
-                                       0,0,0);
+       WriteT55xx(data, 0, last_block+1);

 
        LED_D_OFF();
 
        DbpString("DONE!");
 }
 
 
        LED_D_OFF();
 
        DbpString("DONE!");
 }
 

-void CopyIOtoT55x7(uint32_t hi, uint32_t lo, uint8_t longFMT)
-{
-       int data1=0, data2=0; //up to six blocks for long format
-
-       data1 = hi;  // load preamble
-       data2 = lo;
+void CopyIOtoT55x7(uint32_t hi, uint32_t lo) {
+       uint32_t data[] = {T55x7_BITRATE_RF_64 | T55x7_MODULATION_FSK2a | (2 << T55x7_MAXBLOCK_SHIFT), hi, lo};
+       //TODO add selection of chip for Q5 or T55x7
+       //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
+       // data[0] = (64 << T5555_BITRATE_SHIFT) | T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 2 << T5555_MAXBLOCK_SHIFT;

 
        LED_D_ON();
        // Program the data blocks for supplied ID
 
        LED_D_ON();
        // Program the data blocks for supplied ID

-       // and the block 0 for HID format
-       T55xxWriteBlock(data1,1,0,0);
-       T55xxWriteBlock(data2,2,0,0);
-
-       //Config Block
-       T55xxWriteBlock(0x00147040,0,0,0);
+       // and the block 0 config
+       WriteT55xx(data, 0, 3);

        LED_D_OFF();
        LED_D_OFF();

+       DbpString("DONE!");
+}
+
+// Clone Indala 64-bit tag by UID to T55x7
+void CopyIndala64toT55x7(uint32_t hi, uint32_t lo) {
+       //Program the 2 data blocks for supplied 64bit UID
+       // and the Config for Indala 64 format (RF/32;PSK1 with RF/2;Maxblock=2)
+       uint32_t data[] = { T55x7_BITRATE_RF_32 | T55x7_MODULATION_PSK1 | (2 << T55x7_MAXBLOCK_SHIFT), hi, lo};
+       //TODO add selection of chip for Q5 or T55x7
+       // data[0] = (((32-2)/2)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_PSK1 | 2 << T5555_MAXBLOCK_SHIFT;

 
 

+       WriteT55xx(data, 0, 3);
+       //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=2;Inverse data)
+       //      T5567WriteBlock(0x603E1042,0);
+       DbpString("DONE!");
+}
+// Clone Indala 224-bit tag by UID to T55x7
+void CopyIndala224toT55x7(uint32_t uid1, uint32_t uid2, uint32_t uid3, uint32_t uid4, uint32_t uid5, uint32_t uid6, uint32_t uid7) {
+       //Program the 7 data blocks for supplied 224bit UID
+       uint32_t data[] = {0, uid1, uid2, uid3, uid4, uid5, uid6, uid7};
+       // and the block 0 for Indala224 format 
+       //Config for Indala (RF/32;PSK1 with RF/2;Maxblock=7)
+       data[0] = T55x7_BITRATE_RF_32 | T55x7_MODULATION_PSK1 | (7 << T55x7_MAXBLOCK_SHIFT);
+       //TODO add selection of chip for Q5 or T55x7
+       // data[0] = (((32-2)/2)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_PSK1 | 7 << T5555_MAXBLOCK_SHIFT;
+       WriteT55xx(data, 0, 8);
+       //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=7;Inverse data)
+       //      T5567WriteBlock(0x603E10E2,0);

        DbpString("DONE!");
 }
        DbpString("DONE!");
 }

+// clone viking tag to T55xx
+void CopyVikingtoT55xx(uint32_t block1, uint32_t block2, uint8_t Q5) {
+       uint32_t data[] = {T55x7_BITRATE_RF_32 | T55x7_MODULATION_MANCHESTER | (2 << T55x7_MAXBLOCK_SHIFT), block1, block2};
+       //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
+       if (Q5) data[0] = (32 << T5555_BITRATE_SHIFT) | T5555_MODULATION_MANCHESTER | 2 << T5555_MAXBLOCK_SHIFT;
+       // Program the data blocks for supplied ID and the block 0 config
+       WriteT55xx(data, 0, 3);
+       LED_D_OFF();
+       cmd_send(CMD_ACK,0,0,0,0,0);
+}

 
 // Define 9bit header for EM410x tags
 #define EM410X_HEADER          0x1FF
 #define EM410X_ID_LENGTH       40
 
 
 // Define 9bit header for EM410x tags
 #define EM410X_HEADER          0x1FF
 #define EM410X_ID_LENGTH       40
 

-void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
-{
+void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) {

        int i, id_bit;
        uint64_t id = EM410X_HEADER;
        uint64_t rev_id = 0;    // reversed ID
        int i, id_bit;
        uint64_t id = EM410X_HEADER;
        uint64_t rev_id = 0;    // reversed ID


@@ -1397,360 +1484,32 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
        LED_D_ON();
 
        // Write EM410x ID
        LED_D_ON();
 
        // Write EM410x ID

-       T55xxWriteBlock((uint32_t)(id >> 32), 1, 0, 0);
-       T55xxWriteBlock((uint32_t)id, 2, 0, 0);
-
-       // Config for EM410x (RF/64, Manchester, Maxblock=2)
-       if (card) {
-               // Clock rate is stored in bits 8-15 of the card value
-               clock = (card & 0xFF00) >> 8;
-               Dbprintf("Clock rate: %d", clock);
-               switch (clock)
-               {
-               case 32:
-                       clock = T55x7_BITRATE_RF_32;
-                       break;
-               case 16:
-                       clock = T55x7_BITRATE_RF_16;
-                       break;
-               case 0:
-                       // A value of 0 is assumed to be 64 for backwards-compatibility
-                       // Fall through...
-               case 64:
-                       clock = T55x7_BITRATE_RF_64;
-                       break;
-               default:
+       uint32_t data[] = {0, (uint32_t)(id>>32), (uint32_t)(id & 0xFFFFFFFF)};
+
+       clock = (card & 0xFF00) >> 8;
+       clock = (clock == 0) ? 64 : clock;
+       Dbprintf("Clock rate: %d", clock);
+       if (card & 0xFF) { //t55x7
+               clock = GetT55xxClockBit(clock);
+               if (clock == 0) {

                        Dbprintf("Invalid clock rate: %d", clock);
                        return;
                }
                        Dbprintf("Invalid clock rate: %d", clock);
                        return;
                }

-
-               // Writing configuration for T55x7 tag
-               T55xxWriteBlock(clock       |
-                                               T55x7_MODULATION_MANCHESTER |
-                                               2 << T55x7_MAXBLOCK_SHIFT,
-                                               0, 0, 0);
+               data[0] = clock | T55x7_MODULATION_MANCHESTER | (2 << T55x7_MAXBLOCK_SHIFT);
+       } else { //t5555 (Q5)
+               clock = (clock-2)>>1;  //n = (RF-2)/2
+               data[0] = (clock << T5555_BITRATE_SHIFT) | T5555_MODULATION_MANCHESTER | (2 << T5555_MAXBLOCK_SHIFT);

        }
        }

-       else
-               // Writing configuration for T5555(Q5) tag
-               T55xxWriteBlock(0x1F << T5555_BITRATE_SHIFT |
-                                               T5555_MODULATION_MANCHESTER |
-                                               2 << T5555_MAXBLOCK_SHIFT,
-                                               0, 0, 0);
+ 
+       WriteT55xx(data, 0, 3);

 
        LED_D_OFF();
 
        LED_D_OFF();

-       Dbprintf("Tag %s written with 0x%08x%08x\n", card ? "T55x7":"T5555",
-                        (uint32_t)(id >> 32), (uint32_t)id);
-}
-
-// 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);
-       T55xxWriteBlock(lo,2,0,0);
-       //Config for Indala (RF/32;PSK1 with RF/2;Maxblock=2)
-       T55xxWriteBlock(T55x7_BITRATE_RF_32    |
-                                       T55x7_MODULATION_PSK1 |
-                                       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);
-
-       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);
-       T55xxWriteBlock(uid2,2,0,0);
-       T55xxWriteBlock(uid3,3,0,0);
-       T55xxWriteBlock(uid4,4,0,0);
-       T55xxWriteBlock(uid5,5,0,0);
-       T55xxWriteBlock(uid6,6,0,0);
-       T55xxWriteBlock(uid7,7,0,0);
-       //Config for Indala (RF/32;PSK1 with RF/2;Maxblock=7)
-       T55xxWriteBlock(T55x7_BITRATE_RF_32    |
-                                       T55x7_MODULATION_PSK1 |
-                                       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);
-
-       DbpString("DONE!");
-
-}
-
-
-#define abs(x) ( ((x)<0) ? -(x) : (x) )
-#define max(x,y) ( x<y ? y:x)
-
-int DemodPCF7931(uint8_t **outBlocks) {
-       uint8_t BitStream[256];
-       uint8_t Blocks[8][16];
-       uint8_t *GraphBuffer = BigBuf_get_addr();
-       int GraphTraceLen = BigBuf_max_traceLen();
-       int i, j, lastval, bitidx, half_switch;
-       int clock = 64;
-       int tolerance = clock / 8;
-       int pmc, block_done;
-       int lc, warnings = 0;
-       int num_blocks = 0;
-       int lmin=128, lmax=128;
-       uint8_t dir;
-
-       LFSetupFPGAForADC(95, true);
-       DoAcquisition_default(0, 0);
-
-
-       lmin = 64;
-       lmax = 192;
-
-       i = 2;
-
-       /* Find first local max/min */
-       if(GraphBuffer[1] > GraphBuffer[0]) {
-               while(i < GraphTraceLen) {
-                       if( !(GraphBuffer[i] > GraphBuffer[i-1]) && GraphBuffer[i] > lmax)
-                               break;
-                       i++;
-               }
-               dir = 0;
-       }
-       else {
-               while(i < GraphTraceLen) {
-                       if( !(GraphBuffer[i] < GraphBuffer[i-1]) && GraphBuffer[i] < lmin)
-                               break;
-                       i++;
-               }
-               dir = 1;
-       }
-
-       lastval = i++;
-       half_switch = 0;
-       pmc = 0;
-       block_done = 0;
-
-       for (bitidx = 0; i < GraphTraceLen; i++)
-       {
-               if ( (GraphBuffer[i-1] > GraphBuffer[i] && dir == 1 && GraphBuffer[i] > lmax) || (GraphBuffer[i-1] < GraphBuffer[i] && dir == 0 && GraphBuffer[i] < lmin))
-               {
-                       lc = i - lastval;
-                       lastval = i;
-
-                       // Switch depending on lc length:
-                       // Tolerance is 1/8 of clock rate (arbitrary)
-                       if (abs(lc-clock/4) < tolerance) {
-                               // 16T0
-                               if((i - pmc) == lc) { /* 16T0 was previous one */
-                                       /* It's a PMC ! */
-                                       i += (128+127+16+32+33+16)-1;
-                                       lastval = i;
-                                       pmc = 0;
-                                       block_done = 1;
-                               }
-                               else {
-                                       pmc = i;
-                               }
-                       } else if (abs(lc-clock/2) < tolerance) {
-                               // 32TO
-                               if((i - pmc) == lc) { /* 16T0 was previous one */
-                                       /* It's a PMC ! */
-                                       i += (128+127+16+32+33)-1;
-                                       lastval = i;
-                                       pmc = 0;
-                                       block_done = 1;
-                               }
-                               else if(half_switch == 1) {
-                                       BitStream[bitidx++] = 0;
-                                       half_switch = 0;
-                               }
-                               else
-                                       half_switch++;
-                       } else if (abs(lc-clock) < tolerance) {
-                               // 64TO
-                               BitStream[bitidx++] = 1;
-                       } else {
-                               // Error
-                               warnings++;
-                               if (warnings > 10)
-                               {
-                                       Dbprintf("Error: too many detection errors, aborting.");
-                                       return 0;
-                               }
-                       }
-
-                       if(block_done == 1) {
-                               if(bitidx == 128) {
-                                       for(j=0; j<16; j++) {
-                                               Blocks[num_blocks][j] = 128*BitStream[j*8+7]+
-                                                               64*BitStream[j*8+6]+
-                                                               32*BitStream[j*8+5]+
-                                                               16*BitStream[j*8+4]+
-                                                               8*BitStream[j*8+3]+
-                                                               4*BitStream[j*8+2]+
-                                                               2*BitStream[j*8+1]+
-                                                               BitStream[j*8];
-                                       }
-                                       num_blocks++;
-                               }
-                               bitidx = 0;
-                               block_done = 0;
-                               half_switch = 0;
-                       }
-                       if(i < GraphTraceLen)
-                       {
-                               if (GraphBuffer[i-1] > GraphBuffer[i]) dir=0;
-                               else dir = 1;
-                       }
-               }
-               if(bitidx==255)
-                       bitidx=0;
-               warnings = 0;
-               if(num_blocks == 4) break;
-       }
-       memcpy(outBlocks, Blocks, 16*num_blocks);
-       return num_blocks;
-}
-
-int IsBlock0PCF7931(uint8_t *Block) {
-       // Assume RFU means 0 :)
-       if((memcmp(Block, "\x00\x00\x00\x00\x00\x00\x00\x01", 8) == 0) && memcmp(Block+9, "\x00\x00\x00\x00\x00\x00\x00", 7) == 0) // PAC enabled
-               return 1;
-       if((memcmp(Block+9, "\x00\x00\x00\x00\x00\x00\x00", 7) == 0) && Block[7] == 0) // PAC disabled, can it *really* happen ?
-               return 1;
-       return 0;
+       Dbprintf("Tag %s written with 0x%08x%08x\n",
+                       card ? "T55x7":"T5555",
+                       (uint32_t)(id >> 32),
+                       (uint32_t)id);

 }
 
 }
 

-int IsBlock1PCF7931(uint8_t *Block) {
-       // Assume RFU means 0 :)
-       if(Block[10] == 0 && Block[11] == 0 && Block[12] == 0 && Block[13] == 0)
-               if((Block[14] & 0x7f) <= 9 && Block[15] <= 9)
-                       return 1;
-
-       return 0;
-}
-
-#define ALLOC 16
-
-void ReadPCF7931() {
-       uint8_t Blocks[8][17];
-       uint8_t tmpBlocks[4][16];
-       int i, j, ind, ind2, n;
-       int num_blocks = 0;
-       int max_blocks = 8;
-       int ident = 0;
-       int error = 0;
-       int tries = 0;
-
-       memset(Blocks, 0, 8*17*sizeof(uint8_t));
-
-       do {
-               memset(tmpBlocks, 0, 4*16*sizeof(uint8_t));
-               n = DemodPCF7931((uint8_t**)tmpBlocks);
-               if(!n)
-                       error++;
-               if(error==10 && num_blocks == 0) {
-                       Dbprintf("Error, no tag or bad tag");
-                       return;
-               }
-               else if (tries==20 || error==10) {
-                       Dbprintf("Error reading the tag");
-                       Dbprintf("Here is the partial content");
-                       goto end;
-               }
-
-               for(i=0; i<n; i++)
-                       Dbprintf("(dbg) %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
-                                        tmpBlocks[i][0], tmpBlocks[i][1], tmpBlocks[i][2], tmpBlocks[i][3], tmpBlocks[i][4], tmpBlocks[i][5], tmpBlocks[i][6], tmpBlocks[i][7],
-                                       tmpBlocks[i][8], tmpBlocks[i][9], tmpBlocks[i][10], tmpBlocks[i][11], tmpBlocks[i][12], tmpBlocks[i][13], tmpBlocks[i][14], tmpBlocks[i][15]);
-               if(!ident) {
-                       for(i=0; i<n; i++) {
-                               if(IsBlock0PCF7931(tmpBlocks[i])) {
-                                       // Found block 0 ?
-                                       if(i < n-1 && IsBlock1PCF7931(tmpBlocks[i+1])) {
-                                               // Found block 1!
-                                               // \o/
-                                               ident = 1;
-                                               memcpy(Blocks[0], tmpBlocks[i], 16);
-                                               Blocks[0][ALLOC] = 1;
-                                               memcpy(Blocks[1], tmpBlocks[i+1], 16);
-                                               Blocks[1][ALLOC] = 1;
-                                               max_blocks = max((Blocks[1][14] & 0x7f), Blocks[1][15]) + 1;
-                                               // Debug print
-                                               Dbprintf("(dbg) Max blocks: %d", max_blocks);
-                                               num_blocks = 2;
-                                               // Handle following blocks
-                                               for(j=i+2, ind2=2; j!=i; j++, ind2++, num_blocks++) {
-                                                       if(j==n) j=0;
-                                                       if(j==i) break;
-                                                       memcpy(Blocks[ind2], tmpBlocks[j], 16);
-                                                       Blocks[ind2][ALLOC] = 1;
-                                               }
-                                               break;
-                                       }
-                               }
-                       }
-               }
-               else {
-                       for(i=0; i<n; i++) { // Look for identical block in known blocks
-                               if(memcmp(tmpBlocks[i], "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16)) { // Block is not full of 00
-                                       for(j=0; j<max_blocks; j++) {
-                                               if(Blocks[j][ALLOC] == 1 && !memcmp(tmpBlocks[i], Blocks[j], 16)) {
-                                                       // Found an identical block
-                                                       for(ind=i-1,ind2=j-1; ind >= 0; ind--,ind2--) {
-                                                               if(ind2 < 0)
-                                                                       ind2 = max_blocks;
-                                                               if(!Blocks[ind2][ALLOC]) { // Block ind2 not already found
-                                                                       // Dbprintf("Tmp %d -> Block %d", ind, ind2);
-                                                                       memcpy(Blocks[ind2], tmpBlocks[ind], 16);
-                                                                       Blocks[ind2][ALLOC] = 1;
-                                                                       num_blocks++;
-                                                                       if(num_blocks == max_blocks) goto end;
-                                                               }
-                                                       }
-                                                       for(ind=i+1,ind2=j+1; ind < n; ind++,ind2++) {
-                                                               if(ind2 > max_blocks)
-                                                                       ind2 = 0;
-                                                               if(!Blocks[ind2][ALLOC]) { // Block ind2 not already found
-                                                                       // Dbprintf("Tmp %d -> Block %d", ind, ind2);
-                                                                       memcpy(Blocks[ind2], tmpBlocks[ind], 16);
-                                                                       Blocks[ind2][ALLOC] = 1;
-                                                                       num_blocks++;
-                                                                       if(num_blocks == max_blocks) goto end;
-                                                               }
-                                                       }
-                                               }
-                                       }
-                               }
-                       }
-               }
-               tries++;
-               if (BUTTON_PRESS()) return;
-       } while (num_blocks != max_blocks);
- end:
-       Dbprintf("-----------------------------------------");
-       Dbprintf("Memory content:");
-       Dbprintf("-----------------------------------------");
-       for(i=0; i<max_blocks; i++) {
-               if(Blocks[i][ALLOC]==1)
-                       Dbprintf("%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
-                                        Blocks[i][0], Blocks[i][1], Blocks[i][2], Blocks[i][3], Blocks[i][4], Blocks[i][5], Blocks[i][6], Blocks[i][7],
-                                       Blocks[i][8], Blocks[i][9], Blocks[i][10], Blocks[i][11], Blocks[i][12], Blocks[i][13], Blocks[i][14], Blocks[i][15]);
-               else
-                       Dbprintf("<missing block %d>", i);
-       }
-       Dbprintf("-----------------------------------------");
-
-       return ;
-}
-
-

 //-----------------------------------
 // EM4469 / EM4305 routines
 //-----------------------------------
 //-----------------------------------
 // EM4469 / EM4305 routines
 //-----------------------------------


@@ -1759,7 +1518,6 @@ void ReadPCF7931() {
 #define FWD_CMD_READ 0x9
 #define FWD_CMD_DISABLE 0x5
 
 #define FWD_CMD_READ 0x9
 #define FWD_CMD_DISABLE 0x5
 

-

 uint8_t forwardLink_data[64]; //array of forwarded bits
 uint8_t * forward_ptr; //ptr for forward message preparation
 uint8_t fwd_bit_sz; //forwardlink bit counter
 uint8_t forwardLink_data[64]; //array of forwarded bits
 uint8_t * forward_ptr; //ptr for forward message preparation
 uint8_t fwd_bit_sz; //forwardlink bit counter


@@ -1770,8 +1528,15 @@ uint8_t * fwd_write_ptr; //forwardlink bit pointer
 // see EM4469 spec
 //====================================================================
 //--------------------------------------------------------------------
 // see EM4469 spec
 //====================================================================
 //--------------------------------------------------------------------

+//  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); 
+

 uint8_t Prepare_Cmd( uint8_t cmd ) {
 uint8_t Prepare_Cmd( uint8_t cmd ) {

-       //--------------------------------------------------------------------

 
        *forward_ptr++ = 0; //start bit
        *forward_ptr++ = 0; //second pause for 4050 code
 
        *forward_ptr++ = 0; //start bit
        *forward_ptr++ = 0; //second pause for 4050 code


@@ -1791,10 +1556,7 @@ uint8_t Prepare_Cmd( uint8_t cmd ) {
 // prepares address bits
 // see EM4469 spec
 //====================================================================
 // prepares address bits
 // see EM4469 spec
 //====================================================================

-
-//--------------------------------------------------------------------

 uint8_t Prepare_Addr( uint8_t addr ) {
 uint8_t Prepare_Addr( uint8_t addr ) {

-       //--------------------------------------------------------------------

 
        register uint8_t line_parity;
 
 
        register uint8_t line_parity;
 


@@ -1815,10 +1577,7 @@ uint8_t Prepare_Addr( uint8_t addr ) {
 // prepares data bits intreleaved with parity bits
 // see EM4469 spec
 //====================================================================
 // prepares data bits intreleaved with parity bits
 // see EM4469 spec
 //====================================================================

-
-//--------------------------------------------------------------------

 uint8_t Prepare_Data( uint16_t data_low, uint16_t data_hi) {
 uint8_t Prepare_Data( uint16_t data_low, uint16_t data_hi) {

-       //--------------------------------------------------------------------

 
        register uint8_t line_parity;
        register uint8_t column_parity;
 
        register uint8_t line_parity;
        register uint8_t column_parity;


@@ -1862,35 +1621,27 @@ void SendForward(uint8_t fwd_bit_count) {
 
        LED_D_ON();
 
 
        LED_D_ON();
 

-       //Field on
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       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.
-       // And for the tag to fully power up
-       SpinDelay(150);
-
+       // Set up FPGA, 125kHz
+       LFSetupFPGAForADC(95, true);
+       

        // force 1st mod pulse (start gap must be longer for 4305)
        fwd_bit_sz--; //prepare next bit modulation
        fwd_write_ptr++;
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        // force 1st mod pulse (start gap must be longer for 4305)
        fwd_bit_sz--; //prepare next bit modulation
        fwd_write_ptr++;
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off

-       SpinDelayUs(55*8); //55 cycles off (8us each)for 4305
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+       WaitUS(55*8); //55 cycles off (8us each)for 4305        // ICEMAN:  problem with (us) clock is  21.3us increments

        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on

-       SpinDelayUs(16*8); //16 cycles on (8us each)
+       WaitUS(16*8); //16 cycles on (8us each) // ICEMAN:  problem with (us) clock is  21.3us increments

 
        // now start writting
        while(fwd_bit_sz-- > 0) { //prepare next bit modulation
                if(((*fwd_write_ptr++) & 1) == 1)
 
        // now start writting
        while(fwd_bit_sz-- > 0) { //prepare next bit modulation
                if(((*fwd_write_ptr++) & 1) == 1)

-                       SpinDelayUs(32*8); //32 cycles at 125Khz (8us each)
+                       WaitUS(32*8); //32 cycles at 125Khz (8us each)  // ICEMAN:  problem with (us) clock is  21.3us increments

                else {
                        //These timings work for 4469/4269/4305 (with the 55*8 above)
                        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
                else {
                        //These timings work for 4469/4269/4305 (with the 55*8 above)
                        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off

-                       SpinDelayUs(23*8); //16-4 cycles off (8us each)
-                       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+                       WaitUS(23*8); //16-4 cycles off (8us each)      // ICEMAN:  problem with (us) clock is  21.3us increments

                        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
                        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on

-                       SpinDelayUs(9*8); //16 cycles on (8us each)
+                       WaitUS(9*8); //16 cycles on (8us each)  // ICEMAN:  problem with (us) clock is  21.3us increments

                }
        }
 }
                }
        }
 }


@@ -1907,15 +1658,18 @@ void EM4xLogin(uint32_t Password) {
 
        //Wait for command to complete
        SpinDelay(20);
 
        //Wait for command to complete
        SpinDelay(20);

-

 }
 
 void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
 
        uint8_t fwd_bit_count;
        uint8_t *dest = BigBuf_get_addr();
 }
 
 void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
 
        uint8_t fwd_bit_count;
        uint8_t *dest = BigBuf_get_addr();

-       int m=0, i=0;
+       uint16_t bufsize = BigBuf_max_traceLen();
+       uint32_t i = 0;

 
 

+       // Clear destination buffer before sending the command
+       BigBuf_Clear_ext(false);
+       

        //If password mode do login
        if (PwdMode == 1) EM4xLogin(Pwd);
 
        //If password mode do login
        if (PwdMode == 1) EM4xLogin(Pwd);
 


@@ -1923,9 +1677,6 @@ void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
        fwd_bit_count = Prepare_Cmd( FWD_CMD_READ );
        fwd_bit_count += Prepare_Addr( Address );
 
        fwd_bit_count = Prepare_Cmd( FWD_CMD_READ );
        fwd_bit_count += Prepare_Addr( Address );
 

-       m = BigBuf_max_traceLen();
-       // 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.
        // 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.


@@ -1941,11 +1692,13 @@ void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;

-                       i++;
-                       if (i >= m) break;
+                       ++i;
+                       if (i >= bufsize) break;

                }
        }
                }
        }

-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off    
+       cmd_send(CMD_ACK,0,0,0,0,0);

        LED_D_OFF();
 }
 
        LED_D_OFF();
 }