]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/lfops.c
lf cleaning++
[proxmark3-svn] / armsrc / lfops.c
index b9dbb8e27cdc386692cd58ad8923ae3d64d93f38..e5a40b2e916f16b4d963325c7bf1c940502e0a47 100644 (file)
 #include "crc16.h"
 #include "string.h"
 #include "lfdemod.h"
 #include "crc16.h"
 #include "string.h"
 #include "lfdemod.h"
+#include "lfsampling.h"
+#include "usb_cdc.h"
 
 
 /**
 
 
 /**
-* Does the sample acquisition. If threshold is specified, the actual sampling
-* is not commenced until the threshold has been reached.
-* @param trigger_threshold - the threshold
-* @param silent - is true, now outputs are made. If false, dbprints the status
-*/
-void DoAcquisition125k_internal(int trigger_threshold,bool silent)
-{
-       uint8_t *dest = (uint8_t *)BigBuf;
-       int n = sizeof(BigBuf);
-       int i;
-
-       memset(dest, 0, n);
-       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;
-                       LED_D_OFF();
-                       if (trigger_threshold != -1 && dest[i] < trigger_threshold)
-                               continue;
-                       else
-                               trigger_threshold = -1;
-                       if (++i >= n) break;
-               }
-       }
-       if(!silent)
-       {
-               Dbprintf("buffer samples: %02x %02x %02x %02x %02x %02x %02x %02x ...",
-                   dest[0], dest[1], dest[2], dest[3], dest[4], dest[5], dest[6], dest[7]);
-
-       }
-}
-/**
-* Perform sample aquisition.
-*/
-void DoAcquisition125k(int trigger_threshold)
-{
-       DoAcquisition125k_internal(trigger_threshold, false);
-}
-
-/**
-* Setup the FPGA to listen for samples. This method downloads the FPGA bitstream
-* if not already loaded, sets divisor and starts up the antenna.
-* @param divisor : 1, 88> 255 or negative ==> 134.8 KHz
-*                                 0 or 95 ==> 125 KHz
-*
-**/
-void LFSetupFPGAForADC(int divisor, bool lf_field)
-{
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       if ( (divisor == 1) || (divisor < 0) || (divisor > 255) )
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
-       else if (divisor == 0)
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       else
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor);
-
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | (lf_field ? FPGA_LF_ADC_READER_FIELD : 0));
-
-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-       // Give it a bit of time for the resonant antenna to settle.
-       SpinDelay(50);
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-}
-/**
-* Initializes the FPGA, and acquires the samples.
-**/
-void AcquireRawAdcSamples125k(int divisor)
-{
-       LFSetupFPGAForADC(divisor, true);
-       // Now call the acquisition routine
-       DoAcquisition125k_internal(-1,false);
-}
-/**
-* Initializes the FPGA for snoop-mode, and acquires the samples.
-**/
-
-void SnoopLFRawAdcSamples(int divisor, int trigger_threshold)
-{
-       LFSetupFPGAForADC(divisor, false);
-       DoAcquisition125k(trigger_threshold);
-}
-
+ * Function to do a modulation and then get samples.
+ * @param delay_off
+ * @param period_0
+ * @param period_1
+ * @param command
+ */
 void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, uint8_t *command)
 {
 
 void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, uint8_t *command)
 {
 
-       /* Make sure the tag is reset */
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       SpinDelay(2500);
-
-
        int divisor_used = 95; // 125 KHz
        // see if 'h' was specified
 
        if (command[strlen((char *) command) - 1] == 'h')
                divisor_used = 88; // 134.8 KHz
 
        int divisor_used = 95; // 125 KHz
        // see if 'h' was specified
 
        if (command[strlen((char *) command) - 1] == 'h')
                divisor_used = 88; // 134.8 KHz
 
+       sample_config sc = { 0,0,1, divisor_used, 0};
+       setSamplingConfig(&sc);
 
 
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor_used);
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
-       // Give it a bit of time for the resonant antenna to settle.
-       SpinDelay(50);
+       /* Make sure the tag is reset */
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       SpinDelay(2500);
+
+       LFSetupFPGAForADC(sc.divisor, 1);
 
        // And a little more time for the tag to fully power up
        SpinDelay(2000);
 
 
        // And a little more time for the tag to fully power up
        SpinDelay(2000);
 
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-
        // now modulate the reader field
        while(*command != '\0' && *command != ' ') {
                FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
                LED_D_OFF();
                SpinDelayUs(delay_off);
        // now modulate the reader field
        while(*command != '\0' && *command != ' ') {
                FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
                LED_D_OFF();
                SpinDelayUs(delay_off);
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor_used);
+               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
 
                FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
                LED_D_ON();
 
                FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
                LED_D_ON();
@@ -150,14 +65,16 @@ void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1,
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LED_D_OFF();
        SpinDelayUs(delay_off);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LED_D_OFF();
        SpinDelayUs(delay_off);
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor_used);
+       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
-       DoAcquisition125k(-1);
+       DoAcquisition_config(false);
 }
 
 }
 
+
+
 /* blank r/w tag data stream
 ...0000000000000000 01111111
 1010101010101010101010101010101010101010101010101010101010101010
 /* blank r/w tag data stream
 ...0000000000000000 01111111
 1010101010101010101010101010101010101010101010101010101010101010
@@ -177,8 +94,8 @@ void ReadTItag(void)
  #define FREQLO 123200
  #define FREQHI 134200
 
  #define FREQLO 123200
  #define FREQHI 134200
 
-       signed char *dest = (signed char *)BigBuf;
-       int n = sizeof(BigBuf);
+       signed char *dest = (signed char *)BigBuf_get_addr();
+       uint16_t n = BigBuf_max_traceLen();
        // 128 bit shift register [shift3:shift2:shift1:shift0]
        uint32_t shift3 = 0, shift2 = 0, shift1 = 0, shift0 = 0;
 
        // 128 bit shift register [shift3:shift2:shift1:shift0]
        uint32_t shift3 = 0, shift2 = 0, shift1 = 0, shift0 = 0;
 
@@ -288,7 +205,7 @@ void ReadTItag(void)
                crc = update_crc16(crc, (shift1>>24)&0xff);
 
                Dbprintf("Info: Tag data: %x%08x, crc=%x",
                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);
+                                (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 {
@@ -330,7 +247,8 @@ void AcquireTiType(void)
  #define TIBUFLEN 1250
 
        // clear buffer
  #define TIBUFLEN 1250
 
        // clear buffer
-       memset(BigBuf,0,sizeof(BigBuf));
+       uint32_t *BigBuf = (uint32_t *)BigBuf_get_addr();
+       memset(BigBuf,0,BigBuf_max_traceLen()/sizeof(uint32_t));
 
        // 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;
@@ -378,7 +296,7 @@ void AcquireTiType(void)
        AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DOUT;
        AT91C_BASE_PIOA->PIO_ASR = GPIO_SSC_DIN | GPIO_SSC_DOUT;
 
        AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DOUT;
        AT91C_BASE_PIOA->PIO_ASR = GPIO_SSC_DIN | GPIO_SSC_DOUT;
 
-       char *dest = (char *)BigBuf;
+       char *dest = (char *)BigBuf_get_addr();
        n = TIBUFLEN*32;
        // unpack buffer
        for (i=TIBUFLEN-1; i>=0; i--) {
        n = TIBUFLEN*32;
        // unpack buffer
        for (i=TIBUFLEN-1; i>=0; i--) {
@@ -409,7 +327,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
                crc = update_crc16(crc, (idhi>>24)&0xff);
        }
        Dbprintf("Writing to tag: %x%08x, crc=%x",
                crc = update_crc16(crc, (idhi>>24)&0xff);
        }
        Dbprintf("Writing to tag: %x%08x, crc=%x",
-           (unsigned int) idhi, (unsigned int) idlo, crc);
+                       (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
@@ -467,7 +385,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
 void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 {
        int i;
 void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 {
        int i;
-       uint8_t *tab = (uint8_t *)BigBuf;
+       uint8_t *tab = BigBuf_get_addr();
 
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
 
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
@@ -477,19 +395,19 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
        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)
+ #define SHORT_COIL()  LOW(GPIO_SSC_DOUT)
+ #define OPEN_COIL()           HIGH(GPIO_SSC_DOUT)
 
        i = 0;
        for(;;) {
 
        i = 0;
        for(;;) {
+               //wait until SSC_CLK goes HIGH
                while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
                while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
-                       if(BUTTON_PRESS()) {
+                       if(BUTTON_PRESS() || usb_poll()) {
                                DbpString("Stopped");
                                return;
                        }
                        WDT_HIT();
                }
                                DbpString("Stopped");
                                return;
                        }
                        WDT_HIT();
                }
-
                if (ledcontrol)
                        LED_D_ON();
 
                if (ledcontrol)
                        LED_D_ON();
 
@@ -500,7 +418,7 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 
                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) {
                        if(BUTTON_PRESS()) {
                                DbpString("Stopped");
                while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {
                        if(BUTTON_PRESS()) {
                                DbpString("Stopped");
@@ -511,6 +429,7 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 
                i++;
                if(i == period) {
 
                i++;
                if(i == period) {
+
                        i = 0;
                        if (gap) {
                                SHORT_COIL();
                        i = 0;
                        if (gap) {
                                SHORT_COIL();
@@ -525,29 +444,31 @@ void SimulateTagLowFrequencyBidir(int divisor, int t0)
 {
 }
 
 {
 }
 
-// compose fc/8 fc/10 waveform
-static void fc(int c, int *n) {
-       uint8_t *dest = (uint8_t *)BigBuf;
+// compose fc/8 fc/10 waveform (FSK2)
+static void fc(int c, int *n)
+{
+       uint8_t *dest = BigBuf_get_addr();
        int idx;
 
        // for when we want an fc8 pattern every 4 logical bits
        if(c==0) {
                dest[((*n)++)]=1;
                dest[((*n)++)]=1;
        int idx;
 
        // for when we want an fc8 pattern every 4 logical bits
        if(c==0) {
                dest[((*n)++)]=1;
                dest[((*n)++)]=1;
-               dest[((*n)++)]=0;
-               dest[((*n)++)]=0;
+               dest[((*n)++)]=1;
+               dest[((*n)++)]=1;
                dest[((*n)++)]=0;
                dest[((*n)++)]=0;
                dest[((*n)++)]=0;
                dest[((*n)++)]=0;
        }
                dest[((*n)++)]=0;
                dest[((*n)++)]=0;
                dest[((*n)++)]=0;
                dest[((*n)++)]=0;
        }
-       //      an fc/8  encoded bit is a bit pattern of  11000000  x6 = 48 samples
+
+       //      an fc/8  encoded bit is a bit pattern of  11110000  x6 = 48 samples
        if(c==8) {
                for (idx=0; idx<6; idx++) {
                        dest[((*n)++)]=1;
                        dest[((*n)++)]=1;
        if(c==8) {
                for (idx=0; idx<6; idx++) {
                        dest[((*n)++)]=1;
                        dest[((*n)++)]=1;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
+                       dest[((*n)++)]=1;
+                       dest[((*n)++)]=1;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
@@ -555,14 +476,14 @@ static void fc(int c, int *n) {
                }
        }
 
                }
        }
 
-       //      an fc/10 encoded bit is a bit pattern of 1110000000 x5 = 50 samples
+       //      an fc/10 encoded bit is a bit pattern of 1111100000 x5 = 50 samples
        if(c==10) {
                for (idx=0; idx<5; idx++) {
                        dest[((*n)++)]=1;
                        dest[((*n)++)]=1;
                        dest[((*n)++)]=1;
        if(c==10) {
                for (idx=0; idx<5; idx++) {
                        dest[((*n)++)]=1;
                        dest[((*n)++)]=1;
                        dest[((*n)++)]=1;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
+                       dest[((*n)++)]=1;
+                       dest[((*n)++)]=1;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
                        dest[((*n)++)]=0;
@@ -571,6 +492,36 @@ static void fc(int c, int *n) {
                }
        }
 }
                }
        }
 }
+// compose fc/X fc/Y waveform (FSKx)
+static void fcAll(uint8_t fc, int *n, uint8_t clock, uint16_t *modCnt) 
+{
+       uint8_t *dest = BigBuf_get_addr();
+       uint8_t halfFC = fc/2;
+       uint8_t wavesPerClock = clock/fc;
+       uint8_t mod = clock % fc;    //modifier
+       uint8_t modAdj = fc/mod;     //how often to apply modifier
+       bool modAdjOk = !(fc % mod); //if (fc % mod==0) modAdjOk=TRUE;
+       // loop through clock - step field clock
+       for (uint8_t idx=0; idx < wavesPerClock; idx++){
+               // put 1/2 FC length 1's and 1/2 0's per field clock wave (to create the wave)
+               memset(dest+(*n), 0, fc-halfFC);  //in case of odd number use extra here
+               memset(dest+(*n)+(fc-halfFC), 1, halfFC);
+               *n += fc;
+       }
+       if (mod>0) (*modCnt)++;
+       if ((mod>0) && modAdjOk){  //fsk2 
+               if ((*modCnt % modAdj) == 0){ //if 4th 8 length wave in a rf/50 add extra 8 length wave
+                       memset(dest+(*n), 0, fc-halfFC);
+                       memset(dest+(*n)+(fc-halfFC), 1, halfFC);
+                       *n += fc;
+               }
+       }
+       if (mod>0 && !modAdjOk){  //fsk1
+               memset(dest+(*n), 0, mod-(mod/2));
+               memset(dest+(*n)+(mod-(mod/2)), 1, mod/2);
+               *n += mod;
+       }
+}
 
 // prepare a waveform pattern in the buffer based on the ID given then
 // simulate a HID tag until the button is pressed
 
 // prepare a waveform pattern in the buffer based on the ID given then
 // simulate a HID tag until the button is pressed
@@ -588,12 +539,12 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
        */
 
        if (hi>0xFFF) {
        */
 
        if (hi>0xFFF) {
-               DbpString("Tags can only have 44 bits.");
+               DbpString("Tags can only have 44 bits. - USE lf simfsk for larger tags");
                return;
        }
        fc(0,&n);
        // special start of frame marker containing invalid bit sequences
                return;
        }
        fc(0,&n);
        // special start of frame marker containing invalid bit sequences
-       fc(8,  &n);     fc(8,  &n);     // invalid
+       fc(8,  &n);     fc(8,  &n); // invalid
        fc(8,  &n);     fc(10, &n); // logical 0
        fc(10, &n);     fc(10, &n); // invalid
        fc(8,  &n);     fc(10, &n); // logical 0
        fc(8,  &n);     fc(10, &n); // logical 0
        fc(10, &n);     fc(10, &n); // invalid
        fc(8,  &n);     fc(10, &n); // logical 0
@@ -603,9 +554,9 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
        for (i=11; i>=0; i--) {
                if ((i%4)==3) fc(0,&n);
                if ((hi>>i)&1) {
        for (i=11; i>=0; i--) {
                if ((i%4)==3) fc(0,&n);
                if ((hi>>i)&1) {
-                       fc(10, &n);     fc(8,  &n);             // low-high transition
+                       fc(10, &n); fc(8,  &n);         // low-high transition
                } else {
                } else {
-                       fc(8,  &n);     fc(10, &n);             // high-low transition
+                       fc(8,  &n); fc(10, &n);         // high-low transition
                }
        }
 
                }
        }
 
@@ -614,9 +565,9 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
        for (i=31; i>=0; i--) {
                if ((i%4)==3) fc(0,&n);
                if ((lo>>i)&1) {
        for (i=31; i>=0; i--) {
                if ((i%4)==3) fc(0,&n);
                if ((lo>>i)&1) {
-                       fc(10, &n);     fc(8,  &n);             // low-high transition
+                       fc(10, &n); fc(8,  &n);         // low-high transition
                } else {
                } else {
-                       fc(8,  &n);     fc(10, &n);             // high-low transition
+                       fc(8,  &n); fc(10, &n);         // high-low transition
                }
        }
 
                }
        }
 
@@ -628,14 +579,186 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
                LED_A_OFF();
 }
 
                LED_A_OFF();
 }
 
+// prepare a waveform pattern in the buffer based on the ID given then
+// simulate a FSK tag until the button is pressed
+// 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;
+       uint8_t fcHigh = arg1 >> 8;
+       uint8_t fcLow = arg1 & 0xFF;
+       uint16_t modCnt = 0;
+       uint8_t clk = arg2 & 0xFF;
+       uint8_t invert = (arg2 >> 8) & 1;
+
+       for (i=0; i<size; i++){
+               if (BitStream[i] == invert){
+                       fcAll(fcLow, &n, clk, &modCnt);
+               } else {
+                       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();
+
+       SimulateTagLowFrequency(n, 0, ledcontrol);
+
+       if (ledcontrol)
+               LED_A_OFF();
+}
+
+// compose ask waveform for one bit(ASK)
+static void askSimBit(uint8_t c, int *n, uint8_t clock, uint8_t manchester)
+{
+       uint8_t *dest = BigBuf_get_addr();
+       uint8_t halfClk = clock/2;
+       // c = current bit 1 or 0
+       if (manchester==1){
+               memset(dest+(*n), c, halfClk);
+               memset(dest+(*n) + halfClk, c^1, halfClk);
+       } else {
+               memset(dest+(*n), c, clock);
+       }
+       *n += clock;
+}
+
+static void biphaseSimBit(uint8_t c, int *n, uint8_t clock, uint8_t *phase)
+{
+       uint8_t *dest = BigBuf_get_addr();
+       uint8_t halfClk = clock/2;
+       if (c){
+               memset(dest+(*n), c ^ 1 ^ *phase, halfClk);
+               memset(dest+(*n) + halfClk, c ^ *phase, halfClk);
+       } else {
+               memset(dest+(*n), c ^ *phase, clock);
+               *phase ^= 1;
+       }
+
+}
+
+// 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;
+       uint8_t clk = (arg1 >> 8) & 0xFF;
+       uint8_t encoding = arg1 & 1;
+       uint8_t separator = arg2 & 1;
+       uint8_t invert = (arg2 >> 8) & 1;
+
+       if (encoding==2){  //biphase
+               uint8_t phase=0;
+               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
+                       for (i=0; i<size; i++){
+                               biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
+                       }
+               }
+       } else {  // ask/manchester || ask/raw
+               for (i=0; i<size; i++){
+                       askSimBit(BitStream[i]^invert, &n, clk, encoding);
+               }
+               if (encoding==0 && BitStream[0]==BitStream[size-1]){ //run a second set inverted (for biphase phase)
+                       for (i=0; i<size; i++){
+                               askSimBit(BitStream[i]^invert^1, &n, clk, encoding);
+                       }
+               }
+       }
+       
+       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();
+       
+       SimulateTagLowFrequency(n, 0, ledcontrol);
+
+       if (ledcontrol)
+               LED_A_OFF();
+}
+
+//carrier can be 2,4 or 8
+static void pskSimBit(uint8_t waveLen, int *n, uint8_t clk, uint8_t *curPhase, bool phaseChg)
+{
+       uint8_t *dest = BigBuf_get_addr();
+       uint8_t halfWave = waveLen/2;
+       //uint8_t idx;
+       int i = 0;
+       if (phaseChg){
+               // write phase change
+               memset(dest+(*n), *curPhase^1, halfWave);
+               memset(dest+(*n) + halfWave, *curPhase, halfWave);
+               *n += waveLen;
+               *curPhase ^= 1;
+               i += waveLen;
+       }
+       //write each normal clock wave for the clock duration
+       for (; i < clk; i+=waveLen){
+               memset(dest+(*n), *curPhase, halfWave);
+               memset(dest+(*n) + halfWave, *curPhase^1, halfWave);
+               *n += waveLen;
+       }
+}
+
+// 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;
+       uint8_t clk = arg1 >> 8;
+       uint8_t carrier = arg1 & 0xFF;
+       uint8_t invert = arg2 & 0xFF;
+       uint8_t curPhase = 0;
+       for (i=0; i<size; i++){
+               if (BitStream[i] == curPhase){
+                       pskSimBit(carrier, &n, clk, &curPhase, FALSE);
+               } else {
+                       pskSimBit(carrier, &n, clk, &curPhase, TRUE);
+               }
+       }
+       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();
+       SimulateTagLowFrequency(n, 0, ledcontrol);
+
+       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)
 {
 // 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 = (uint8_t *)BigBuf;
-
-       size_t size=0; //, found=0;
+       uint8_t *dest = BigBuf_get_addr();
+       //const size_t sizeOfBigBuff = BigBuf_max_traceLen();
+       size_t size
        uint32_t hi2=0, hi=0, lo=0;
        uint32_t hi2=0, hi=0, lo=0;
-
+       int idx=0;
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
@@ -644,19 +767,18 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 
-               DoAcquisition125k_internal(-1,true);
+               DoAcquisition_default(-1,true);
                // FSK demodulator
                // FSK demodulator
-               size = HIDdemodFSK(dest, sizeof(BigBuf), &hi2, &hi, &lo);
-
-               WDT_HIT();
-
-               if (size>0 && lo>0){
-                       // final loop, go over previously decoded manchester data and decode into usable tag ID
-                       // 111000 bit pattern represent start of frame, 01 pattern represents a 1 and 10 represents a 0
-                       if (hi2 != 0){ //extra large HID tags
+               //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);
+               
+               if (idx>0 && lo>0 && (size==96 || size==192)){
+                       // 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)",
                                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 <38 bits
+                                 (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
                                uint8_t bitlen = 0;
                                uint32_t fc = 0;
                                //Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd
                                uint8_t bitlen = 0;
                                uint32_t fc = 0;
@@ -701,16 +823,18 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                                //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)",
                                // (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
                                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();
+                               *high = hi;
+                               *low = lo;
                                return;
                        }
                        // reset
                                return;
                        }
                        // reset
-                       hi2 = hi = lo = 0;
                }
                }
+               hi2 = hi = lo = idx = 0;
                WDT_HIT();
        }
        DbpString("Stopped");
                WDT_HIT();
        }
        DbpString("Stopped");
@@ -719,10 +843,11 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 
 void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
 {
 
 void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
 {
-       uint8_t *dest = (uint8_t *)BigBuf;
+       uint8_t *dest = BigBuf_get_addr();
 
 
-       size_t size=0;
-       int clk=0, invert=0, errCnt=0;
+       size_t size=0, idx=0;
+       int clk=0, invert=0, errCnt=0, maxErr=20;
+       uint32_t hi=0;
        uint64_t lo=0;
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
        uint64_t lo=0;
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
@@ -732,38 +857,44 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 
-               DoAcquisition125k_internal(-1,true);
-               size = sizeof(BigBuf);
-               //Dbprintf("DEBUG: Buffer got");
+               DoAcquisition_default(-1,true);
+               size  = BigBuf_max_traceLen();
                //askdemod and manchester decode
                //askdemod and manchester decode
-               errCnt = askmandemod(dest, &size, &clk, &invert);
-               //Dbprintf("DEBUG: ASK Got");
+               if (size > 16385) size = 16385; //big enough to catch 2 sequences of largest format
+               errCnt = askmandemod(dest, &size, &clk, &invert, maxErr);
                WDT_HIT();
 
                WDT_HIT();
 
-               if (errCnt>=0){
-                       lo = Em410xDecode(dest,size);
-                       //Dbprintf("DEBUG: EM GOT");
-                       if (lo>0){
+               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)",
                                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));
+                                 (uint32_t)(lo>>32),
+                                 (uint32_t)lo,
+                                 (uint32_t)(lo&0xFFFF),
+                                 (uint32_t)((lo>>16LL) & 0xFF),
+                                 (uint32_t)(lo & 0xFFFFFF));
                        }
                        }
+
                        if (findone){
                        if (findone){
-                               if (ledcontrol) LED_A_OFF();
+                               if (ledcontrol) LED_A_OFF();
+                               *high=lo>>32;
+                               *low=lo & 0xFFFFFFFF;
                                return;
                        }
                                return;
                        }
-               } else{
-                       //Dbprintf("DEBUG: No Tag");
                }
                WDT_HIT();
                }
                WDT_HIT();
-               lo = 0;
-               clk=0;
-               invert=0;
-               errCnt=0;
-               size=0;
+               hi = lo = size = idx = 0;
+               clk = invert = errCnt = 0;
        }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
        }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
@@ -771,7 +902,7 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
 
 void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 {
 
 void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 {
-       uint8_t *dest = (uint8_t *)BigBuf;
+       uint8_t *dest = BigBuf_get_addr();
        int idx=0;
        uint32_t code=0, code2=0;
        uint8_t version=0;
        int idx=0;
        uint32_t code=0, code2=0;
        uint8_t version=0;
@@ -783,49 +914,51 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
        while(!BUTTON_PRESS()) {
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
        while(!BUTTON_PRESS()) {
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
-               DoAcquisition125k_internal(-1,true);
+               DoAcquisition_default(-1,true);
                //fskdemod and get start index
                WDT_HIT();
                //fskdemod and get start index
                WDT_HIT();
-               idx = IOdemodFSK(dest,sizeof(BigBuf));
-               if (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 ???????? 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();
-                               return;
-                       }
-                       code=code2=0;
-                       version=facilitycode=0;
-                       number=0;
-                       idx=0;
+               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;
+
                WDT_HIT();
        }
        DbpString("Stopped");
                WDT_HIT();
        }
        DbpString("Stopped");
@@ -891,10 +1024,12 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
  * 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.
  */
-#define START_GAP 250
-#define WRITE_GAP 160
-#define WRITE_0   144 // 192
-#define WRITE_1   400 // 432 for T55x7; 448 for E5550
+#define START_GAP 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..)
 
 // Write one bit to card
 void T55xxWriteBit(int bit)
 
 // Write one bit to card
 void T55xxWriteBit(int bit)
@@ -913,16 +1048,11 @@ void T55xxWriteBit(int bit)
 // Write one card block in page 0, no lock
 void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
 {
 // Write one card block in page 0, no lock
 void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
 {
-       //unsigned int i;  //enio adjustment 12/10/14
-       uint32_t i;
+       uint32_t i = 0;
 
 
-       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
+       // Wait for config.. (192+8190xPOW)x8 == 67ms
+       LFSetupFPGAForADC(0, true);
 
        // Now start writting
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 
        // Now start writting
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
@@ -955,30 +1085,28 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMod
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_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);
+}
+
+
 // Read one card block in page 0
 void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
 {
 // Read one card block in page 0
 void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
 {
-       uint8_t *dest = (uint8_t *)BigBuf;
-       //int m=0, i=0; //enio adjustment 12/10/14
-       uint32_t m=0, i=0;
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       m = sizeof(BigBuf);
-       // Clear destination buffer before sending the command
-       memset(dest, 128, m);
-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-
-       LED_D_ON();
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+       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;
 
 
-       // Give it a bit of time for the resonant antenna to settle.
-       // And for the tag to fully power up
-       SpinDelay(150);
+       // Clear destination buffer before sending the command
+       memset(dest, 0x80, bufferlength);
 
 
-       // Now start writting
+       // Set up FPGA, 125kHz
+       // Wait for config.. (192+8190xPOW)x8 == 67ms
+       LFSetupFPGAForADC(0, true);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        SpinDelayUs(START_GAP);
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        SpinDelayUs(START_GAP);
 
@@ -997,53 +1125,40 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
                T55xxWriteBit(Block & i);
 
        // Turn field on to read the response
                T55xxWriteBit(Block & i);
 
        // Turn field on to read the response
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
-
+       TurnReadLFOn();
        // Now do the acquisition
        i = 0;
        for(;;) {
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
                        AT91C_BASE_SSC->SSC_THR = 0x43;
        // 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;
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       // we don't care about actual value, only if it's more or less than a
-                       // threshold essentially we capture zero crossings for later analysis
-                       //                      if(dest[i] < 127) dest[i] = 0; else dest[i] = 1;
                        i++;
                        i++;
-                       if (i >= m) break;
+                       LED_D_OFF();
+                       if (i >= bufferlength) break;
                }
        }
 
                }
        }
 
+       cmd_send(CMD_ACK,0,0,0,0,0);    
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        LED_D_OFF();
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        LED_D_OFF();
-       DbpString("DONE!");
 }
 
 // Read card traceability data (page 1)
 void T55xxReadTrace(void){
 }
 
 // Read card traceability data (page 1)
 void T55xxReadTrace(void){
-       uint8_t *dest = (uint8_t *)BigBuf;
-       int m=0, 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;
 
 
-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
-       m = sizeof(BigBuf);
        // Clear destination buffer before sending the command
        // Clear destination buffer before sending the command
-       memset(dest, 128, m);
-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-
-       LED_D_ON();
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+       memset(dest, 0x80, bufferlength);
 
 
-       // Give it a bit of time for the resonant antenna to settle.
-       // And for the tag to fully power up
-       SpinDelay(150);
-
-       // Now start writting
+       LFSetupFPGAForADC(0, true);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        SpinDelayUs(START_GAP);
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        SpinDelayUs(START_GAP);
 
@@ -1052,25 +1167,26 @@ void T55xxReadTrace(void){
        T55xxWriteBit(1); //Page 1
 
        // Turn field on to read the response
        T55xxWriteBit(1); //Page 1
 
        // Turn field on to read the response
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+       TurnReadLFOn();
 
        // Now do the acquisition
 
        // Now do the acquisition
-       i = 0;
        for(;;) {
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
                        AT91C_BASE_SSC->SSC_THR = 0x43;
        for(;;) {
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
                        AT91C_BASE_SSC->SSC_THR = 0x43;
+                       LED_D_ON();
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        i++;
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        i++;
-                       if (i >= m) break;
+                       LED_D_OFF();
+
+                       if (i >= bufferlength) break;
                }
        }
 
                }
        }
 
+       cmd_send(CMD_ACK,0,0,0,0,0);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        LED_D_OFF();
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        LED_D_OFF();
-       DbpString("DONE!");
 }
 
 /*-------------- Cloning routines -----------*/
 }
 
 /*-------------- Cloning routines -----------*/
@@ -1291,39 +1407,39 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
                Dbprintf("Clock rate: %d", clock);
                switch (clock)
                {
                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:
-                               Dbprintf("Invalid clock rate: %d", clock);
-                               return;
+               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:
+                       Dbprintf("Invalid clock rate: %d", clock);
+                       return;
                }
 
                // Writing configuration for T55x7 tag
                T55xxWriteBlock(clock       |
                }
 
                // Writing configuration for T55x7 tag
                T55xxWriteBlock(clock       |
-                   T55x7_MODULATION_MANCHESTER |
-                   2 << T55x7_MAXBLOCK_SHIFT,
-                   0, 0, 0);
+                                               T55x7_MODULATION_MANCHESTER |
+                                               2 << T55x7_MAXBLOCK_SHIFT,
+                                               0, 0, 0);
        }
        else
                // Writing configuration for T5555(Q5) tag
                T55xxWriteBlock(0x1F << T5555_BITRATE_SHIFT |
        }
        else
                // Writing configuration for T5555(Q5) tag
                T55xxWriteBlock(0x1F << T5555_BITRATE_SHIFT |
-                   T5555_MODULATION_MANCHESTER   |
-                   2 << T5555_MAXBLOCK_SHIFT,
-                   0, 0, 0);
+                                               T5555_MODULATION_MANCHESTER |
+                                               2 << T5555_MAXBLOCK_SHIFT,
+                                               0, 0, 0);
 
        LED_D_OFF();
        Dbprintf("Tag %s written with 0x%08x%08x\n", card ? "T55x7":"T5555",
 
        LED_D_OFF();
        Dbprintf("Tag %s written with 0x%08x%08x\n", card ? "T55x7":"T5555",
-           (uint32_t)(id >> 32), (uint32_t)id);
+                        (uint32_t)(id >> 32), (uint32_t)id);
 }
 
 // Clone Indala 64-bit tag by UID to T55x7
 }
 
 // Clone Indala 64-bit tag by UID to T55x7
@@ -1336,9 +1452,9 @@ void CopyIndala64toT55x7(int hi, int lo)
        T55xxWriteBlock(lo,2,0,0);
        //Config for Indala (RF/32;PSK1 with RF/2;Maxblock=2)
        T55xxWriteBlock(T55x7_BITRATE_RF_32    |
        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);
+                                       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);
 
        //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=2;Inverse data)
        //      T5567WriteBlock(0x603E1042,0);
 
@@ -1360,9 +1476,9 @@ void CopyIndala224toT55x7(int uid1, int uid2, int uid3, int uid4, int uid5, int
        T55xxWriteBlock(uid7,7,0,0);
        //Config for Indala (RF/32;PSK1 with RF/2;Maxblock=7)
        T55xxWriteBlock(T55x7_BITRATE_RF_32    |
        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);
+                                       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);
 
        //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=7;Inverse data)
        //      T5567WriteBlock(0x603E10E2,0);
 
@@ -1377,8 +1493,8 @@ void CopyIndala224toT55x7(int uid1, int uid2, int uid3, int uid4, int uid5, int
 int DemodPCF7931(uint8_t **outBlocks) {
        uint8_t BitStream[256];
        uint8_t Blocks[8][16];
 int DemodPCF7931(uint8_t **outBlocks) {
        uint8_t BitStream[256];
        uint8_t Blocks[8][16];
-       uint8_t *GraphBuffer = (uint8_t *)BigBuf;
-       int GraphTraceLen = sizeof(BigBuf);
+       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 i, j, lastval, bitidx, half_switch;
        int clock = 64;
        int tolerance = clock / 8;
@@ -1388,7 +1504,9 @@ int DemodPCF7931(uint8_t **outBlocks) {
        int lmin=128, lmax=128;
        uint8_t dir;
 
        int lmin=128, lmax=128;
        uint8_t dir;
 
-       AcquireRawAdcSamples125k(0);
+       LFSetupFPGAForADC(95, true);
+       DoAcquisition_default(0, 0);
+
 
        lmin = 64;
        lmax = 192;
 
        lmin = 64;
        lmax = 192;
@@ -1471,13 +1589,13 @@ int DemodPCF7931(uint8_t **outBlocks) {
                                if(bitidx == 128) {
                                        for(j=0; j<16; j++) {
                                                Blocks[num_blocks][j] = 128*BitStream[j*8+7]+
                                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];
+                                                               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++;
                                }
                                        }
                                        num_blocks++;
                                }
@@ -1549,8 +1667,8 @@ void ReadPCF7931() {
 
                for(i=0; i<n; i++)
                        Dbprintf("(dbg) %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
 
                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]);
+                                        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])) {
                if(!ident) {
                        for(i=0; i<n; i++) {
                                if(IsBlock0PCF7931(tmpBlocks[i])) {
@@ -1615,15 +1733,15 @@ void ReadPCF7931() {
                tries++;
                if (BUTTON_PRESS()) return;
        } while (num_blocks != max_blocks);
                tries++;
                if (BUTTON_PRESS()) return;
        } while (num_blocks != max_blocks);
-end:
+ 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",
        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]);
+                                        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);
        }
                else
                        Dbprintf("<missing block %d>", i);
        }
@@ -1795,7 +1913,7 @@ void EM4xLogin(uint32_t Password) {
 void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
 
        uint8_t fwd_bit_count;
 void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
 
        uint8_t fwd_bit_count;
-       uint8_t *dest = (uint8_t *)BigBuf;
+       uint8_t *dest = BigBuf_get_addr();
        int m=0, i=0;
 
        //If password mode do login
        int m=0, i=0;
 
        //If password mode do login
@@ -1805,7 +1923,7 @@ 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 = sizeof(BigBuf);
+       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.
        // Clear destination buffer before sending the command
        memset(dest, 128, m);
        // Connect the A/D to the peak-detected low-frequency path.
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