hf mf sim: Multiple fixes (iceman1001/proxmark3 #45)

[proxmark3-svn] / armsrc / lfops.c

diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index 8b7e98fc2e31b7cd27b2d9c23f3f588abf7f899b..bbd848ce0f46f3e338934c1c39a7cd0afe108040 100644 (file)
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -19,6 +19,13 @@
 #include "protocols.h"
 #include "usb_cdc.h" // for usb_poll_validate_length
 
 #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


@@ -53,19 +60,19 @@ void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t periods, uint3
        while(*command != '\0' && *command != ' ') {
                FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
                LED_D_OFF();
        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);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 


@@ -84,6 +91,7 @@ void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t periods, uint3
 */
 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);

                }
        }
 }
                }
        }
 }


@@ -275,7 +284,7 @@ void AcquireTiType(void)
        HIGH(GPIO_SSC_DOUT);
 
        // Charge TI tag for 50ms.
        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();
 


@@ -379,36 +389,38 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        DbpString("Now use `lf ti read` to check");
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        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 | FPGA_LF_EDGE_DETECT_READER_FIELD);
+       //FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);

 
        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_PER = GPIO_SSC_DOUT;

        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)
+       StartTicks();

 
 

-       i = 0;

        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();


@@ -417,23 +429,27 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
                
                //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();
                                SHORT_COIL();

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

                        }
                }
        }
                        }
                }
        }

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

 }
 
 #define DEBUG_FRAME_CONTENTS 1
 }
 
 #define DEBUG_FRAME_CONTENTS 1


@@ -524,7 +540,10 @@ 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 +554,7 @@ 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 +586,8 @@ 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 +598,14 @@ 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 +613,15 @@ 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);


@@ -644,19 +672,21 @@ static void stAskSimBit(int *n, uint8_t clock) {
 // 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 (phase==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);
                        }


@@ -676,6 +706,8 @@ void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
        else if (separator==1)
                Dbprintf("sorry but separator option not yet available");
 
        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();


@@ -709,8 +741,10 @@ 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;


@@ -722,6 +756,9 @@ 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();


@@ -1088,10 +1125,10 @@ 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


@@ -1100,7 +1137,7 @@ 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


@@ -1108,15 +1145,17 @@ 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


@@ -1126,7 +1165,7 @@ 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)
 }
 
 // Send T5577 reset command then read stream (see if we can identify the start of the stream)


@@ -1140,7 +1179,7 @@ void T55xxResetRead(void) {
 
        // Trigger T55x7 in mode.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 
        // 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);


@@ -1170,7 +1209,7 @@ 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);


@@ -1194,10 +1233,11 @@ 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);


@@ -1219,17 +1259,18 @@ 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);


@@ -1245,8 +1286,8 @@ 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);
 
        // Turn field on to read the response
        TurnReadLFOn(READ_GAP);


@@ -1269,7 +1310,7 @@ 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);


@@ -1485,9 +1526,9 @@ 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


@@ -1506,7 +1547,7 @@ 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 ) {
 


@@ -1600,20 +1641,20 @@ 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

                }
        }
 }
                }
        }
 }


@@ -1621,22 +1662,20 @@ 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;
 
        // Clear destination buffer before sending the command
        uint32_t i = 0;
 
        // Clear destination buffer before sending the command


@@ -1649,14 +1688,10 @@ 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) {


@@ -1689,7 +1724,7 @@ 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();
 }