CHG: spelling mistakes. (

[proxmark3-svn] / armsrc / lfops.c

diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index 22173059fda70b2c5bf54820c6d513f6508c8c04..1b922ca006d28725fafa4506a001eb0786d3d6c1 100644 (file)
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -17,56 +17,63 @@
 #include "lfdemod.h"
 #include "lfsampling.h"
 #include "protocols.h"
 #include "lfdemod.h"
 #include "lfsampling.h"
 #include "protocols.h"

-#include "usb_cdc.h" //test
+#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(uint32_t delay_off, uint32_t period_0, uint32_t 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
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // now do the read


@@ -84,6 +91,7 @@ void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint
 */
 void ReadTItag(void)
 {
 */
 void ReadTItag(void)
 {

+       StartTicks();

        // some hardcoded initial params
        // when we read a TI tag we sample the zerocross line at 2Mhz
        // TI tags modulate a 1 as 16 cycles of 123.2Khz
        // some hardcoded initial params
        // when we read a TI tag we sample the zerocross line at 2Mhz
        // TI tags modulate a 1 as 16 cycles of 123.2Khz


@@ -209,6 +217,7 @@ void ReadTItag(void)
                        DbpString("Info: CRC is good");
                }
        }
                        DbpString("Info: CRC is good");
                }
        }

+       StopTicks();

 }
 
 void WriteTIbyte(uint8_t b)
 }
 
 void WriteTIbyte(uint8_t b)


@@ -218,20 +227,20 @@ 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);

                }
        }
 }
                }
        }
 }


@@ -268,14 +277,14 @@ 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
        HIGH(GPIO_SSC_DOUT);
 
        // Charge TI tag for 50ms.
        LED_D_ON();
 
        // modulate antenna
        HIGH(GPIO_SSC_DOUT);
 
        // Charge TI tag for 50ms.

-       SpinDelay(50);
+       WaitMS(50);

 
        // stop modulating antenna and listen
        LOW(GPIO_SSC_DOUT);
 
        // stop modulating antenna and listen
        LOW(GPIO_SSC_DOUT);


@@ -315,6 +324,7 @@ void AcquireTiType(void)
 // if not provided a valid crc will be computed from the data and written.
 void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
 {
 // if not provided a valid crc will be computed from the data and written.
 void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
 {

+       StartTicks();

        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        if(crc == 0) {
                crc = update_crc16(crc, (idlo)&0xff);
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        if(crc == 0) {
                crc = update_crc16(crc, (idlo)&0xff);


@@ -353,7 +363,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
 
        // modulate antenna
        HIGH(GPIO_SSC_DOUT);
 
        // modulate antenna
        HIGH(GPIO_SSC_DOUT);

-       SpinDelay(50);  // charge time
+       WaitMS(50);     // charge time

 
        WriteTIbyte(0xbb); // keyword
        WriteTIbyte(0xeb); // password
 
        WriteTIbyte(0xbb); // keyword
        WriteTIbyte(0xeb); // password


@@ -370,7 +380,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
        WriteTIbyte(0x00); // write frame lo
        WriteTIbyte(0x03); // write frame hi
        HIGH(GPIO_SSC_DOUT);
        WriteTIbyte(0x00); // write frame lo
        WriteTIbyte(0x03); // write frame hi
        HIGH(GPIO_SSC_DOUT);

-       SpinDelay(50);  // programming time
+       WaitMS(50);     // programming time

 
        LED_A_OFF();
 
 
        LED_A_OFF();
 


@@ -378,62 +388,81 @@ 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 'lf ti read' to check");
+       DbpString("Now use `lf ti read` to check");
+       StopTicks();

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

-       int i;
-       uint8_t *tab = BigBuf_get_addr();
+       int i = 0;
+       uint8_t *buf = BigBuf_get_addr();

 
 

-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);

        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);

+       //FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT | FPGA_LF_EDGE_DETECT_READER_FIELD);
+       //FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT | FPGA_LF_EDGE_DETECT_TOGGLE_MODE );

 
 

+       // set frequency,  get values from 'lf config' command
+       sample_config *sc = getSamplingConfig();
+
+       if ( (sc->divisor == 1) || (sc->divisor < 0) || (sc->divisor > 255) )
+               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
+       else if (sc->divisor == 0)
+               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+       else
+               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc->divisor);
+       
+       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
+       

        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_PER = GPIO_SSC_DOUT | 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;
+       // power on antenna
+       // OPEN_COIL();
+       // SpinDelay(50);
+               

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

-               //wait until SSC_CLK goes HIGH
+               WDT_HIT();
+
+               if (ledcontrol) LED_D_ON();
+                               
+               // wait until SSC_CLK goes HIGH
+               // used as a simple detection of a reader field?

                while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
                while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {

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

                        WDT_HIT();
                        WDT_HIT();

+                       if ( usb_poll_validate_length() || BUTTON_PRESS() )
+                               goto OUT;

                }
                }

-               if (ledcontrol) LED_D_ON();
-
-               if(tab[i])
+               
+               if(buf[i])

                        OPEN_COIL();
                else
                        SHORT_COIL();
                        OPEN_COIL();
                else
                        SHORT_COIL();

-
-               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() || !usb_poll_validate_length() ) {
-                               DbpString("Stopped");
-                               return;
-                       }

                        WDT_HIT();
                        WDT_HIT();

+                       if ( usb_poll_validate_length() || BUTTON_PRESS() )
+                               goto OUT;

                }
                }

-
+                               

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

-

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

+                               WDT_HIT();

                                SHORT_COIL();
                                SpinDelayUs(gap);
                        }
                }
                                SHORT_COIL();
                                SpinDelayUs(gap);
                        }
                }

+               
+               if (ledcontrol) LED_D_OFF();

        }
        }

+OUT: 
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       LED_D_OFF();
+       DbpString("Simulation stopped");
+       return; 

 }
 
 #define DEBUG_FRAME_CONTENTS 1
 }
 
 #define DEBUG_FRAME_CONTENTS 1


@@ -524,7 +553,10 @@ 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


@@ -535,7 +567,7 @@ 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;
        }


@@ -567,7 +599,8 @@ 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
                }
        }

-
+       WDT_HIT();
+       

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


@@ -578,8 +611,14 @@ 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;


@@ -587,13 +626,15 @@ 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);
+       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);
 
        if (ledcontrol) LED_A_ON();
        SimulateTagLowFrequency(n, 0, ledcontrol);


@@ -626,25 +667,39 @@ 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 encoding = arg1 & 0xFF;
        uint8_t separator = arg2 & 1;
        uint8_t invert = (arg2 >> 8) & 1;
 
        uint8_t clk = (arg1 >> 8) & 0xFF;
        uint8_t encoding = arg1 & 0xFF;
        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);
                        }


@@ -659,9 +714,13 @@ 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");

 
 

+       WDT_HIT();
+       

        Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d",clk, invert, encoding, separator, n);
 
        if (ledcontrol) LED_A_ON();
        Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d",clk, invert, encoding, separator, n);
 
        if (ledcontrol) LED_A_ON();


@@ -695,8 +754,10 @@ 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;


@@ -708,6 +769,9 @@ 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);
                   
        if (ledcontrol) LED_A_ON();
        Dbprintf("Simulating with Carrier: %d, clk: %d, invert: %d, n: %d",carrier, clk, invert, n);
                   
        if (ledcontrol) LED_A_ON();


@@ -725,6 +789,9 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 

+       //clear read buffer
+       BigBuf_Clear_keep_EM();
+

        while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
 
                WDT_HIT();
        while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
 
                WDT_HIT();


@@ -744,7 +811,7 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                                  (unsigned int) lo,
                                  (unsigned int) (lo>>1) & 0xFFFF
                                  );
                                  (unsigned int) lo,
                                  (unsigned int) (lo>>1) & 0xFFFF
                                  );

-                       }else {  //standard HID tags 44/96 bits
+                       } 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;


@@ -798,13 +865,14 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                                if (ledcontrol) LED_A_OFF();
                                *high = hi;
                                *low = lo;
                                if (ledcontrol) LED_A_OFF();
                                *high = hi;
                                *low = lo;

-                               return;
+                               break;

                        }
                        // reset
                }
                hi2 = hi = lo = idx = 0;
                WDT_HIT();
        }
                        }
                        // reset
                }
                hi2 = hi = lo = idx = 0;
                WDT_HIT();
        }

+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }


@@ -815,6 +883,8 @@ void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
        uint8_t *dest = BigBuf_get_addr();
        size_t size; 
        int idx=0;
        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);
 
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 


@@ -849,7 +919,6 @@ void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 
                size = removeParity(dest, idx+8, 4, 1, 88);
                if (size != 66) continue;
 
                size = removeParity(dest, idx+8, 4, 1, 88);
                if (size != 66) continue;

-               // ok valid card found!

 
                // Index map
                // 0           10         20        30          40        50        60
 
                // Index map
                // 0           10         20        30          40        50        60


@@ -859,40 +928,55 @@ void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
                // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                // |26 bit|   |-117--| |-----142------|
                // 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
                // b = format bit len, o = odd parity of last 3 bits
                // f = facility code, c = card number
                // w = wiegand parity

-               // (26 bit format shown)

 
                uint32_t fc = 0;
                uint32_t cardnum = 0;
                uint32_t code1 = 0;
                uint32_t code2 = 0;
                uint8_t fmtLen = bytebits_to_byte(dest,8);
 
                uint32_t fc = 0;
                uint32_t cardnum = 0;
                uint32_t code1 = 0;
                uint32_t code2 = 0;
                uint8_t fmtLen = bytebits_to_byte(dest,8);

-               if (fmtLen==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: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
-               } else {
-                       cardnum = bytebits_to_byte(dest+8+(fmtLen-17), 16);
-                       if (fmtLen>32){
-                        code1 = bytebits_to_byte(dest+8,fmtLen-32);
-                        code2 = bytebits_to_byte(dest+8+(fmtLen-32),32);
-                        Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
-                } else{
-                        code1 = bytebits_to_byte(dest+8,fmtLen);
-                        Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
-                }
-                       }
-                       if (findone){
-                               if (ledcontrol) LED_A_OFF();
-                               return;
+                       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;          

                        }
                        }

-                       // reset
+                       if (findone)
+                               break;
+

                idx = 0;
                WDT_HIT();
        }
                idx = 0;
                WDT_HIT();
        }

+
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); 

        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }


@@ -905,6 +989,8 @@ 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);
 


@@ -945,13 +1031,14 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
                                if (ledcontrol) LED_A_OFF();
                                *high=lo>>32;
                                *low=lo & 0xFFFFFFFF;
                                if (ledcontrol) LED_A_OFF();
                                *high=lo>>32;
                                *low=lo & 0xFFFFFFFF;

-                               return;
+                               break;

                        }
                }
                WDT_HIT();
                hi = lo = size = idx = 0;
                clk = invert = errCnt = 0;
        }
                        }
                }
                WDT_HIT();
                hi = lo = size = idx = 0;
                clk = invert = errCnt = 0;
        }

+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);         

        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }


@@ -966,6 +1053,10 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
        uint16_t number=0;
        uint8_t crc = 0;
        uint16_t calccrc = 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);
 


@@ -997,15 +1088,15 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                        // Checksum: 0x75
                        //XSF(version)facility:codeone+codetwo
                        //Handle the data
                        // 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]);
-                       }
+                       // 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
                        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


@@ -1026,7 +1117,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                                if (ledcontrol) LED_A_OFF();
                                *high=code;
                                *low=code2;
                                if (ledcontrol) LED_A_OFF();
                                *high=code;
                                *low=code2;

-                               return;
+                               break;

                        }
                        code=code2=0;
                        version=facilitycode=0;
                        }
                        code=code2=0;
                        version=facilitycode=0;


@@ -1035,6 +1126,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 
                WDT_HIT();
        }
 
                WDT_HIT();
        }

+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);         

        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }


@@ -1050,10 +1142,10 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
  * Q5 tags seems to have issues when these values changes. 
  */
 
  * Q5 tags seems to have issues when these values changes. 
  */
 

-#define START_GAP 31*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 START_GAP 50*8 // was 250 // SPEC:  1*8 to 50*8 - typ 15*8 (15fc)
+#define WRITE_GAP 20*8 // was 160 // SPEC:  1*8 to 20*8 - typ 10*8 (10fc)
+#define WRITE_0   18*8 // was 144 // SPEC: 16*8 to 32*8 - typ 24*8 (24fc)
+#define WRITE_1   54*8 // was 400 // SPEC: 48*8 to 64*8 - typ 56*8 (56fc)  432 for T55x7; 448 for E5550

 #define READ_GAP  15*8 
 
 //  VALUES TAKEN FROM EM4x function: SendForward
 #define READ_GAP  15*8 
 
 //  VALUES TAKEN FROM EM4x function: SendForward


@@ -1062,7 +1154,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 //  WRITE_1   = 256 32*8;  (32*8) 
 
 //  These timings work for 4469/4269/4305 (with the 55*8 above)
 //  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); 
+//  WRITE_0 = 23*8 , 9*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
 
 // 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


@@ -1070,15 +1162,17 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 // T0 = TIMER_CLOCK1 / 125000 = 192
 // 1 Cycle = 8 microseconds(us)  == 1 field clock
 
 // T0 = TIMER_CLOCK1 / 125000 = 192
 // 1 Cycle = 8 microseconds(us)  == 1 field clock
 

-void TurnReadLFOn(int delay) {
+// new timer:
+//     = 1us = 1.5ticks
+// 1fc = 8us = 12ticks
+void TurnReadLFOn(uint32_t delay) {

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

-       // Give it a bit of time for the resonant antenna to settle.

 
        // measure antenna strength.
        //int adcval = ((MAX_ADC_LF_VOLTAGE * AvgAdc(ADC_CHAN_LF)) >> 10);
 
        // measure antenna strength.
        //int adcval = ((MAX_ADC_LF_VOLTAGE * AvgAdc(ADC_CHAN_LF)) >> 10);

-       // where to save it
-       
-       SpinDelayUs(delay);
+
+       // Give it a bit of time for the resonant antenna to settle.
+       WaitUS(delay);

 }
 
 // Write one bit to card
 }
 
 // Write one bit to card


@@ -1088,21 +1182,21 @@ void T55xxWriteBit(int bit) {
        else
                TurnReadLFOn(WRITE_1);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        else
                TurnReadLFOn(WRITE_1);
        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
 }
 
 // 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_ext(false);
+       BigBuf_Clear_keep_EM();

 
        // Set up FPGA, 125kHz
        LFSetupFPGAForADC(95, true);
 
        // Trigger T55x7 in mode.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 
        // Set up FPGA, 125kHz
        LFSetupFPGAForADC(95, true);
 
        // Trigger T55x7 in mode.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

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

 
        // reset tag - op code 00
        T55xxWriteBit(0);
 
        // reset tag - op code 00
        T55xxWriteBit(0);


@@ -1132,7 +1226,7 @@ void T55xxWriteBlockExt(uint32_t Data, uint8_t Block, uint32_t Pwd, uint8_t arg)
        
        // Trigger T55x7 in mode.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        
        // Trigger T55x7 in mode.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

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

 
        // Opcode 10
        T55xxWriteBit(1);
 
        // Opcode 10
        T55xxWriteBit(1);


@@ -1156,10 +1250,11 @@ void T55xxWriteBlockExt(uint32_t Data, uint8_t Block, uint32_t Pwd, uint8_t arg)
        // Perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
        // so wait a little more)
        TurnReadLFOn(20 * 1000);
        // Perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
        // so wait a little more)
        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
+       
+       //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);
        
        // turn field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);


@@ -1181,17 +1276,18 @@ void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
        bool RegReadMode = (Block == 0xFF);
        
        //clear buffer now so it does not interfere with timing later
        bool RegReadMode = (Block == 0xFF);
        
        //clear buffer now so it does not interfere with timing later

-       BigBuf_Clear_ext(false);
+       BigBuf_Clear_keep_EM();

 
        //make sure block is at max 7
        Block &= 0x7;
 
        // Set up FPGA, 125kHz to power up the tag
        LFSetupFPGAForADC(95, true);
 
        //make sure block is at max 7
        Block &= 0x7;
 
        // 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);
        
        // Trigger T55x7 Direct Access Mode with start gap
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

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

        
        // Opcode 1[page]
        T55xxWriteBit(1);
        
        // Opcode 1[page]
        T55xxWriteBit(1);


@@ -1207,14 +1303,14 @@ void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
        
        // Send Block number (if direct access mode)
        if (!RegReadMode)
        
        // Send Block number (if direct access mode)
        if (!RegReadMode)

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

 
        // Turn field on to read the response
        TurnReadLFOn(READ_GAP);
        
        // Acquisition
 
        // Turn field on to read the response
        TurnReadLFOn(READ_GAP);
        
        // Acquisition

-       doT55x7Acquisition(12000);
+       doT55x7Acquisition(7679);

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


@@ -1231,7 +1327,7 @@ void T55xxWakeUp(uint32_t Pwd){
        
        // Trigger T55x7 Direct Access Mode
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        
        // Trigger T55x7 Direct Access Mode
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

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

        
        // Opcode 10
        T55xxWriteBit(1);
        
        // Opcode 10
        T55xxWriteBit(1);


@@ -1246,7 +1342,6 @@ void T55xxWakeUp(uint32_t Pwd){
 }
 
 /*-------------- 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--)
 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--)


@@ -1260,7 +1355,7 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
 
        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;
                }
                        DbpString("Tags can only have 84 bits.");
                        return;
                }


@@ -1276,7 +1371,7 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
                data[6] = manchesterEncode2Bytes(lo & 0xFFFF);
        }       else {
                // Ensure no more than 44 bits supplied
                data[6] = manchesterEncode2Bytes(lo & 0xFFFF);
        }       else {
                // 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;
                }


@@ -1306,15 +1401,14 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
 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
 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

-       // data[0] = (((64-2)/2)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 2 << T5555_MAXBLOCK_SHIFT;
+       //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
        // and the block 0 config
        WriteT55xx(data, 0, 3);
 
        LED_D_ON();
        // Program the data blocks for supplied ID
        // and the block 0 config
        WriteT55xx(data, 0, 3);

-

        LED_D_OFF();
        LED_D_OFF();

-

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


@@ -1348,6 +1442,7 @@ void CopyIndala224toT55x7(uint32_t uid1, uint32_t uid2, uint32_t uid3, uint32_t
 // 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};
 // 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);
        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);


@@ -1419,7 +1514,7 @@ 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

-       uint32_t data[] = {0, (uint32_t)(id>>32), id & 0xFFFFFFFF};
+       uint32_t data[] = {0, (uint32_t)(id>>32), (uint32_t)(id & 0xFFFFFFFF)};

 
        clock = (card & 0xFF00) >> 8;
        clock = (clock == 0) ? 64 : clock;
 
        clock = (card & 0xFF00) >> 8;
        clock = (clock == 0) ? 64 : clock;


@@ -1435,7 +1530,7 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) {
                clock = (clock-2)>>1;  //n = (RF-2)/2
                data[0] = (clock << T5555_BITRATE_SHIFT) | T5555_MODULATION_MANCHESTER | (2 << T5555_MAXBLOCK_SHIFT);
        }
                clock = (clock-2)>>1;  //n = (RF-2)/2
                data[0] = (clock << T5555_BITRATE_SHIFT) | T5555_MODULATION_MANCHESTER | (2 << T5555_MAXBLOCK_SHIFT);
        }

-
+ 

        WriteT55xx(data, 0, 3);
 
        LED_D_OFF();
        WriteT55xx(data, 0, 3);
 
        LED_D_OFF();


@@ -1448,9 +1543,9 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) {
 //-----------------------------------
 // EM4469 / EM4305 routines
 //-----------------------------------
 //-----------------------------------
 // EM4469 / EM4305 routines
 //-----------------------------------

-#define FWD_CMD_LOGIN 0xC //including the even parity, binary mirrored
-#define FWD_CMD_WRITE 0xA
-#define FWD_CMD_READ 0x9
+#define FWD_CMD_LOGIN   0xC //including the even parity, binary mirrored
+#define FWD_CMD_WRITE   0xA
+#define FWD_CMD_READ    0x9

 #define FWD_CMD_DISABLE 0x5
 
 uint8_t forwardLink_data[64]; //array of forwarded bits
 #define FWD_CMD_DISABLE 0x5
 
 uint8_t forwardLink_data[64]; //array of forwarded bits


@@ -1469,7 +1564,7 @@ uint8_t * fwd_write_ptr; //forwardlink bit pointer
 //  WRITE_1   = 256 32*8;  (32*8) 
 
 //  These timings work for 4469/4269/4305 (with the 55*8 above)
 //  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); 
+//  WRITE_0 = 23*8 , 9*8

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


@@ -1563,20 +1658,20 @@ void SendForward(uint8_t fwd_bit_count) {
        fwd_bit_sz--; //prepare next bit modulation
        fwd_write_ptr++;
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        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
+       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)
+                       WaitUS(16*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(16*8); //16 cycles on (8us each) // ICEMAN:  problem with (us) clock is  21.3us increments

                }
        }
 }
                }
        }
 }


@@ -1584,25 +1679,23 @@ void SendForward(uint8_t fwd_bit_count) {
 void EM4xLogin(uint32_t Password) {
 
        uint8_t fwd_bit_count;
 void EM4xLogin(uint32_t Password) {
 
        uint8_t fwd_bit_count;

-

        forward_ptr = forwardLink_data;
        fwd_bit_count = Prepare_Cmd( FWD_CMD_LOGIN );
        fwd_bit_count += Prepare_Data( Password&0xFFFF, Password>>16 );
        forward_ptr = forwardLink_data;
        fwd_bit_count = Prepare_Cmd( FWD_CMD_LOGIN );
        fwd_bit_count += Prepare_Data( Password&0xFFFF, Password>>16 );

-

        SendForward(fwd_bit_count);
 
        //Wait for command to complete
        SendForward(fwd_bit_count);
 
        //Wait for command to complete

-       SpinDelay(20);
+       WaitMS(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();

-       uint16_t bufsize = BigBuf_max_traceLen();
+       uint16_t bufsize = BigBuf_max_traceLen();  // ICEMAN: this tries to fill up all tracelog space

        uint32_t i = 0;
 
        uint32_t i = 0;
 

-       //clear buffer now so it does not interfere with timing later
+       // Clear destination buffer before sending the command

        BigBuf_Clear_ext(false);
        
        //If password mode do login
        BigBuf_Clear_ext(false);
        
        //If password mode do login


@@ -1612,14 +1705,10 @@ 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 );
 

-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-

        SendForward(fwd_bit_count);
 
        // Now do the acquisition
        SendForward(fwd_bit_count);
 
        // Now do the acquisition

+       // ICEMAN, change to the one in lfsampling.c

        i = 0;
        for(;;) {
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
        i = 0;
        for(;;) {
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {


@@ -1652,7 +1741,7 @@ void EM4xWriteWord(uint32_t Data, uint8_t Address, uint32_t Pwd, uint8_t PwdMode
        SendForward(fwd_bit_count);
 
        //Wait for write to complete
        SendForward(fwd_bit_count);
 
        //Wait for write to complete

-       SpinDelay(20);
+       WaitMS(20);

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