lf simask, lf simfsk and bug fixes

[proxmark3-svn] / armsrc / appmain.c

diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index f35a82fa544ce1d4c7ab13e4d8ec9e494c2251da..bfb4078dc9e9354117182a74d02739d867873a46 100644 (file)
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -1,23 +1,35 @@
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------

-// The main application code. This is the first thing called after start.c
-// executes.

 // Jonathan Westhues, Mar 2006
 // Edits by Gerhard de Koning Gans, Sep 2007 (##)
 // Jonathan Westhues, Mar 2006
 // Edits by Gerhard de Koning Gans, Sep 2007 (##)

+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// The main application code. This is the first thing called after start.c
+// executes.

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

+#include "usb_cdc.h"
+#include "cmd.h"

 
 

-#include <proxmark3.h>
-#include <stdlib.h>
+#include "proxmark3.h"

 #include "apps.h"
 #include "apps.h"

+#include "util.h"
+#include "printf.h"
+#include "string.h"
+
+#include <stdarg.h>
+
+#include "legicrf.h"
+#include <hitag2.h>
+#include "lfsampling.h"
+#include "BigBuf.h"

 #ifdef WITH_LCD
 #ifdef WITH_LCD

-#include "fonts.h"
-#include "LCD.h"
+ #include "LCD.h"

 #endif
 
 #endif
 

-// The large multi-purpose buffer, typically used to hold A/D samples,
-// maybe pre-processed in some way.
-DWORD BigBuf[16000];
-int usbattached = 0;
+#define abs(x) ( ((x)<0) ? -(x) : (x) )

 
 //=============================================================================
 // A buffer where we can queue things up to be sent through the FPGA, for
 
 //=============================================================================
 // A buffer where we can queue things up to be sent through the FPGA, for


@@ -25,16 +37,11 @@ int usbattached = 0;
 // is the order in which they go out on the wire.
 //=============================================================================
 
 // is the order in which they go out on the wire.
 //=============================================================================
 

-BYTE ToSend[256];
+#define TOSEND_BUFFER_SIZE (9*MAX_FRAME_SIZE + 1 + 1 + 2)  // 8 data bits and 1 parity bit per payload byte, 1 correction bit, 1 SOC bit, 2 EOC bits 
+uint8_t ToSend[TOSEND_BUFFER_SIZE];

 int ToSendMax;
 static int ToSendBit;
 int ToSendMax;
 static int ToSendBit;

-
-
-void BufferClear(void)
-{
-       memset(BigBuf,0,sizeof(BigBuf));
-       DbpString("Buffer cleared");
-}
+struct common_area common_area __attribute__((section(".commonarea")));

 
 void ToSendReset(void)
 {
 
 void ToSendReset(void)
 {


@@ -56,7 +63,7 @@ void ToSendStuffBit(int b)
 
        ToSendBit++;
 
 
        ToSendBit++;
 

-       if(ToSendBit >= sizeof(ToSend)) {
+       if(ToSendMax >= sizeof(ToSend)) {

                ToSendBit = 0;
                DbpString("ToSendStuffBit overflowed!");
        }
                ToSendBit = 0;
                DbpString("ToSendStuffBit overflowed!");
        }


@@ -68,214 +75,54 @@ void ToSendStuffBit(int b)
 
 void DbpString(char *str)
 {
 
 void DbpString(char *str)
 {

-       /* this holds up stuff unless we're connected to usb */
-//     if (!usbattached)
-//             return;
-
-       UsbCommand c;
-       c.cmd = CMD_DEBUG_PRINT_STRING;
-       c.ext1 = strlen(str);
-       memcpy(c.d.asBytes, str, c.ext1);
-
-       UsbSendPacket((BYTE *)&c, sizeof(c));
-       // TODO fix USB so stupid things like this aren't req'd
-       SpinDelay(50);
+  byte_t len = strlen(str);
+  cmd_send(CMD_DEBUG_PRINT_STRING,len,0,0,(byte_t*)str,len);

 }
 
 }
 

+#if 0

 void DbpIntegers(int x1, int x2, int x3)
 {
 void DbpIntegers(int x1, int x2, int x3)
 {

-       /* this holds up stuff unless we're connected to usb */
-//     if (!usbattached)
-//             return;
-
-       UsbCommand c;
-       c.cmd = CMD_DEBUG_PRINT_INTEGERS;
-       c.ext1 = x1;
-       c.ext2 = x2;
-       c.ext3 = x3;
-
-       UsbSendPacket((BYTE *)&c, sizeof(c));
-       // XXX
-       SpinDelay(50);
+  cmd_send(CMD_DEBUG_PRINT_INTEGERS,x1,x2,x3,0,0);

 }
 }

+#endif

 
 

-void AcquireRawAdcSamples125k(BOOL at134khz)
-{
-       if(at134khz) {
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-       } else {
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-       }
-
-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-
-       // Give it a bit of time for the resonant antenna to settle.
-       SpinDelay(50);
-
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-
-       // Now call the acquisition routine
-       DoAcquisition125k(at134khz);
-}
+void Dbprintf(const char *fmt, ...) {
+// should probably limit size here; oh well, let's just use a big buffer
+       char output_string[128];
+       va_list ap;

 
 

-// split into two routines so we can avoid timing issues after sending commands //
-void DoAcquisition125k(BOOL at134khz)
-{
-       BYTE *dest = (BYTE *)BigBuf;
-       int n = sizeof(BigBuf);
-       int i;
+       va_start(ap, fmt);
+       kvsprintf(fmt, output_string, 10, ap);
+       va_end(ap);

 
 

-       memset(dest,0,n);
-       i = 0;
-       for(;;) {
-               if(SSC_STATUS & (SSC_STATUS_TX_READY)) {
-                       SSC_TRANSMIT_HOLDING = 0x43;
-                       LED_D_ON();
-               }
-               if(SSC_STATUS & (SSC_STATUS_RX_READY)) {
-                       dest[i] = (BYTE)SSC_RECEIVE_HOLDING;
-                       i++;
-                       LED_D_OFF();
-                       if(i >= n) {
-                               break;
-                       }
-               }
-       }
-       DbpIntegers(dest[0], dest[1], at134khz);
+       DbpString(output_string);

 }
 
 }
 

-void ModThenAcquireRawAdcSamples125k(int delay_off,int period_0,int period_1,BYTE *command)
-{
-       BOOL at134khz;
-
-       // see if 'h' was specified
-       if(command[strlen((char *) command) - 1] == 'h')
-               at134khz= TRUE;
-       else
-               at134khz= FALSE;
-
-       if(at134khz) {
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-       } else {
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-       }
-
-       // Give it a bit of time for the resonant antenna to settle.
-       SpinDelay(50);
-
-       // 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);
-               if(at134khz) {
-                       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
-                       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+// prints HEX & ASCII
+void Dbhexdump(int len, uint8_t *d, bool bAsci) {
+       int l=0,i;
+       char ascii[9];
+    
+       while (len>0) {
+               if (len>8) l=8;
+               else l=len;
+               
+               memcpy(ascii,d,l);
+               ascii[l]=0;
+               
+               // filter safe ascii
+               for (i=0;i<l;i++)
+                       if (ascii[i]<32 || ascii[i]>126) ascii[i]='.';
+        
+               if (bAsci) {
+                       Dbprintf("%-8s %*D",ascii,l,d," ");

                } else {
                } else {

-                       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-                       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-               }
-               LED_D_ON();
-               if(*(command++) == '0')
-                       SpinDelayUs(period_0);
-               else
-                       SpinDelayUs(period_1);
+                       Dbprintf("%*D",l,d," ");

                }
                }

-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LED_D_OFF();
-       SpinDelayUs(delay_off);
-       if(at134khz) {
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-       } else {
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-       }
-
-       // now do the read
-       DoAcquisition125k(at134khz);
-}
-
-void AcquireTiType(void)
-{
-       int i;
-       int n = 5000;
-
-       // clear buffer
-       memset(BigBuf,0,sizeof(BigBuf));
-
-       // Set up the synchronous serial port
-  PIO_DISABLE = (1<<GPIO_SSC_DIN);
-  PIO_PERIPHERAL_A_SEL = (1<<GPIO_SSC_DIN);
-
-       // steal this pin from the SSP and use it to control the modulation
-  PIO_ENABLE = (1<<GPIO_SSC_DOUT);
-       PIO_OUTPUT_ENABLE       = (1<<GPIO_SSC_DOUT);
-
-  SSC_CONTROL = SSC_CONTROL_RESET;
-  SSC_CONTROL = SSC_CONTROL_RX_ENABLE | SSC_CONTROL_TX_ENABLE;
-
-  // Sample at 2 Mbit/s, so TI tags are 16.2 vs. 14.9 clocks long
-  // 48/2 = 24 MHz clock must be divided by 12
-  SSC_CLOCK_DIVISOR = 12;
-
-  SSC_RECEIVE_CLOCK_MODE = SSC_CLOCK_MODE_SELECT(0);
-       SSC_RECEIVE_FRAME_MODE = SSC_FRAME_MODE_BITS_IN_WORD(32) | SSC_FRAME_MODE_MSB_FIRST;
-       SSC_TRANSMIT_CLOCK_MODE = 0;
-       SSC_TRANSMIT_FRAME_MODE = 0;
-
-       LED_D_ON();
-
-       // modulate antenna
-       PIO_OUTPUT_DATA_SET = (1<<GPIO_SSC_DOUT);
-
-       // Charge TI tag for 50ms.
-       SpinDelay(50);
-
-       // stop modulating antenna and listen
-       PIO_OUTPUT_DATA_CLEAR = (1<<GPIO_SSC_DOUT);
-
-       LED_D_OFF();
-
-       i = 0;
-       for(;;) {
-                       if(SSC_STATUS & SSC_STATUS_RX_READY) {
-                                       BigBuf[i] = SSC_RECEIVE_HOLDING;        // store 32 bit values in buffer
-                                       i++; if(i >= n) return;
-                       }
-                       WDT_HIT();
+        
+               len-=8;
+               d+=8;           

        }
        }

-
-       // return stolen pin to SSP
-       PIO_DISABLE = (1<<GPIO_SSC_DOUT);
-       PIO_PERIPHERAL_A_SEL = (1<<GPIO_SSC_DIN) | (1<<GPIO_SSC_DOUT);
-}
-
-void AcquireRawBitsTI(void)
-{
-       LED_D_ON();
-       // TI tags charge at 134.2Khz
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
-       // Place FPGA in passthrough mode, in this mode the CROSS_LO line
-       // connects to SSP_DIN and the SSP_DOUT logic level controls
-       // whether we're modulating the antenna (high)
-       // or listening to the antenna (low)
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_PASSTHRU);
-
-       // get TI tag data into the buffer
-       AcquireTiType();
-
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

 }
 
 //-----------------------------------------------------------------------------
 }
 
 //-----------------------------------------------------------------------------


@@ -285,22 +132,37 @@ void AcquireRawBitsTI(void)
 //-----------------------------------------------------------------------------
 static int ReadAdc(int ch)
 {
 //-----------------------------------------------------------------------------
 static int ReadAdc(int ch)
 {

-       DWORD d;
-
-       ADC_CONTROL = ADC_CONTROL_RESET;
-       ADC_MODE = ADC_MODE_PRESCALE(32) | ADC_MODE_STARTUP_TIME(16) |
-               ADC_MODE_SAMPLE_HOLD_TIME(8);
-       ADC_CHANNEL_ENABLE = ADC_CHANNEL(ch);
-
-       ADC_CONTROL = ADC_CONTROL_START;
-       while(!(ADC_STATUS & ADC_END_OF_CONVERSION(ch)))
+       uint32_t d;
+
+       AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST;
+       AT91C_BASE_ADC->ADC_MR =
+               ADC_MODE_PRESCALE(63  /* was 32 */) |                                                   // ADC_CLK = MCK / ((63+1) * 2) = 48MHz / 128 = 375kHz
+               ADC_MODE_STARTUP_TIME(1  /* was 16 */) |                                                // Startup Time = (1+1) * 8 / ADC_CLK = 16 / 375kHz = 42,7us     Note: must be > 20us
+               ADC_MODE_SAMPLE_HOLD_TIME(15  /* was 8 */);                                     // Sample & Hold Time SHTIM = 15 / ADC_CLK = 15 / 375kHz = 40us
+
+       // Note: ADC_MODE_PRESCALE and ADC_MODE_SAMPLE_HOLD_TIME are set to the maximum allowed value. 
+       // Both AMPL_LO and AMPL_HI are very high impedance (10MOhm) outputs, the input capacitance of the ADC is 12pF (typical). This results in a time constant
+       // of RC = 10MOhm * 12pF = 120us. Even after the maximum configurable sample&hold time of 40us the input capacitor will not be fully charged. 
+       // 
+       // The maths are:
+       // If there is a voltage v_in at the input, the voltage v_cap at the capacitor (this is what we are measuring) will be
+       //
+       //       v_cap = v_in * (1 - exp(-RC/SHTIM))  =   v_in * (1 - exp(-3))  =  v_in * 0,95                   (i.e. an error of 5%)
+       // 
+       // Note: with the "historic" values in the comments above, the error was 34%  !!!
+       
+       AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ch);
+
+       AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;
+
+       while(!(AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ch)))

                ;
                ;

-       d = ADC_CHANNEL_DATA(ch);
+       d = AT91C_BASE_ADC->ADC_CDR[ch];

 
        return d;
 }
 
 
        return d;
 }
 

-static int AvgAdc(int ch)
+int AvgAdc(int ch) // was static - merlok

 {
        int i;
        int a = 0;
 {
        int i;
        int a = 0;


@@ -314,14 +176,11 @@ static int AvgAdc(int ch)
 
 void MeasureAntennaTuning(void)
 {
 
 void MeasureAntennaTuning(void)
 {

-       BYTE *dest = (BYTE *)BigBuf;
-       int i, ptr = 0, adcval = 0, peak = 0, peakv = 0, peakf = 0;;
+       uint8_t LF_Results[256];
+       int i, adcval = 0, peak = 0, peakv = 0, peakf = 0; //ptr = 0 

        int vLf125 = 0, vLf134 = 0, vHf = 0;    // in mV
 
        int vLf125 = 0, vLf134 = 0, vHf = 0;    // in mV
 

-       UsbCommand c;
-
-       DbpString("Measuring antenna characteristics, please wait.");
-       memset(BigBuf,0,sizeof(BigBuf));
+       LED_B_ON();

 
 /*
  * Sweeps the useful LF range of the proxmark from
 
 /*
  * Sweeps the useful LF range of the proxmark from


@@ -331,396 +190,79 @@ void MeasureAntennaTuning(void)
  * the resonating frequency of your LF antenna
  * ( hopefully around 95 if it is tuned to 125kHz!)
  */
  * the resonating frequency of your LF antenna
  * ( hopefully around 95 if it is tuned to 125kHz!)
  */

-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-       for (i=255; i>19; i--) {
+  
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+       for (i=255; i>=19; i--) {
+    WDT_HIT();

                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, i);
                SpinDelay(20);
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, i);
                SpinDelay(20);

-               // Vref = 3.3V, and a 10000:240 voltage divider on the input
-               // can measure voltages up to 137500 mV
-               adcval = ((137500 * AvgAdc(ADC_CHAN_LF)) >> 10);
+               adcval = ((MAX_ADC_LF_VOLTAGE * AvgAdc(ADC_CHAN_LF)) >> 10);

                if (i==95)      vLf125 = adcval; // voltage at 125Khz
                if (i==89)      vLf134 = adcval; // voltage at 134Khz
 
                if (i==95)      vLf125 = adcval; // voltage at 125Khz
                if (i==89)      vLf134 = adcval; // voltage at 134Khz
 

-               dest[i] = adcval>>8; // scale int to fit in byte for graphing purposes
-               if(dest[i] > peak) {
+               LF_Results[i] = adcval>>8; // scale int to fit in byte for graphing purposes
+               if(LF_Results[i] > peak) {

                        peakv = adcval;
                        peakv = adcval;

-                       peak = dest[i];
+                       peak = LF_Results[i];

                        peakf = i;
                        peakf = i;

-                       ptr = i;
+                       //ptr = i;

                }
        }
 
                }
        }
 

+       for (i=18; i >= 0; i--) LF_Results[i] = 0;
+       
+       LED_A_ON();

        // Let the FPGA drive the high-frequency antenna around 13.56 MHz.
        // Let the FPGA drive the high-frequency antenna around 13.56 MHz.

+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
        SpinDelay(20);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
        SpinDelay(20);

-       // Vref = 3300mV, and an 10:1 voltage divider on the input
-       // can measure voltages up to 33000 mV
-       vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10;
-
-       c.cmd = CMD_MEASURED_ANTENNA_TUNING;
-       c.ext1 = (vLf125 << 0) | (vLf134 << 16);
-       c.ext2 = vHf;
-       c.ext3 = peakf | (peakv << 16);
-       UsbSendPacket((BYTE *)&c, sizeof(c));
+       vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10;
+
+       cmd_send(CMD_MEASURED_ANTENNA_TUNING, vLf125 | (vLf134<<16), vHf, peakf | (peakv<<16), LF_Results, 256);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       LED_A_OFF();
+       LED_B_OFF();
+       return;

 }
 
 }
 

-void SimulateTagLowFrequency(int period, int ledcontrol)
+void MeasureAntennaTuningHf(void)

 {
 {

-       int i;
-       BYTE *tab = (BYTE *)BigBuf;
-
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_SIMULATOR);
-
-       PIO_ENABLE = (1 << GPIO_SSC_DOUT) | (1 << GPIO_SSC_CLK);
-
-       PIO_OUTPUT_ENABLE = (1 << GPIO_SSC_DOUT);
-       PIO_OUTPUT_DISABLE = (1 << GPIO_SSC_CLK);
-
-#define SHORT_COIL()   LOW(GPIO_SSC_DOUT)
-#define OPEN_COIL()    HIGH(GPIO_SSC_DOUT)
-
-       i = 0;
-       for(;;) {
-               while(!(PIO_PIN_DATA_STATUS & (1<<GPIO_SSC_CLK))) {
-                       if(BUTTON_PRESS()) {
-                               DbpString("Stopped");
-                               return;
-                       }
-                       WDT_HIT();
-               }
-
-               if (ledcontrol)
-                       LED_D_ON();
-
-               if(tab[i])
-                       OPEN_COIL();
-               else
-                       SHORT_COIL();
-
-               if (ledcontrol)
-                       LED_D_OFF();
-
-               while(PIO_PIN_DATA_STATUS & (1<<GPIO_SSC_CLK)) {
-                       if(BUTTON_PRESS()) {
-                               DbpString("Stopped");
-                               return;
-                       }
-                       WDT_HIT();
-               }
-
-               i++;
-               if(i == period) i = 0;
-       }
-}
+       int vHf = 0;    // in mV

 
 

-// compose fc/8 fc/10 waveform
-static void fc(int c, int *n) {
-       BYTE *dest = (BYTE *)BigBuf;
-       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)++)]=0;
-               dest[((*n)++)]=0;
-               dest[((*n)++)]=0;
-               dest[((*n)++)]=0;
-       }
-       //      an fc/8  encoded bit is a bit pattern of  11000000  x6 = 48 samples
-       if(c==8) {
-               for (idx=0; idx<6; idx++) {
-                       dest[((*n)++)]=1;
-                       dest[((*n)++)]=1;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
-               }
-       }
+       DbpString("Measuring HF antenna, press button to exit");

 
 

-       //      an fc/10 encoded bit is a bit pattern of 1110000000 x5 = 50 samples
-       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)++)]=0;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
-                       dest[((*n)++)]=0;
-               }
-       }
-}
+       // Let the FPGA drive the high-frequency antenna around 13.56 MHz.
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);

 
 

-// prepare a waveform pattern in the buffer based on the ID given then
-// simulate a HID tag until the button is pressed
-static void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
-{
-       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
-        A 1 bit is represented as 6 fc8 and 5 fc10 patterns
-        A 0 bit is represented as 5 fc10 and 6 fc8 patterns
-        A fc8 is inserted before every 4 bits
-        A special start of frame pattern is used consisting a0b0 where a and b are neither 0
-        nor 1 bits, they are special patterns (a = set of 12 fc8 and b = set of 10 fc10)
-       */
-
-       if (hi>0xFFF) {
-               DbpString("Tags can only have 44 bits.");
-               return;
-       }
-       fc(0,&n);
-       // special start of frame marker containing invalid bit sequences
-       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
-
-       WDT_HIT();
-       // manchester encode bits 43 to 32
-       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
-               } else {
-                       fc(8,  &n);     fc(10, &n);             // high-low transition
-               }
-       }
+       for (;;) {
+               SpinDelay(20);
+               vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10;

 
 

-       WDT_HIT();
-       // manchester encode bits 31 to 0
-       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
-               } else {
-                       fc(8,  &n);     fc(10, &n);             // high-low transition
-               }
+               Dbprintf("%d mV",vHf);
+               if (BUTTON_PRESS()) break;

        }
        }

+       DbpString("cancelled");

 
 

-       if (ledcontrol)
-               LED_A_ON();
-       SimulateTagLowFrequency(n, ledcontrol);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

 
 

-       if (ledcontrol)
-               LED_A_OFF();

 }
 
 }
 

-// loop to capture raw HID waveform then FSK demodulate the TAG ID from it
-static void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
-{
-       BYTE *dest = (BYTE *)BigBuf;
-       int m=0, n=0, i=0, idx=0, found=0, lastval=0;
-       DWORD hi=0, lo=0;
-
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-
-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-
-       // Give it a bit of time for the resonant antenna to settle.
-       SpinDelay(50);
-
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-
-       for(;;) {
-               WDT_HIT();
-               if (ledcontrol)
-                       LED_A_ON();
-               if(BUTTON_PRESS()) {
-                       DbpString("Stopped");
-                       if (ledcontrol)
-                               LED_A_OFF();
-                       return;
-               }
-
-               i = 0;
-               m = sizeof(BigBuf);
-               memset(dest,128,m);
-               for(;;) {
-                       if(SSC_STATUS & (SSC_STATUS_TX_READY)) {
-                               SSC_TRANSMIT_HOLDING = 0x43;
-                               if (ledcontrol)
-                                       LED_D_ON();
-                       }
-                       if(SSC_STATUS & (SSC_STATUS_RX_READY)) {
-                               dest[i] = (BYTE)SSC_RECEIVE_HOLDING;
-                               // we don't care about actual value, only if it's more or less than a
-                               // threshold essentially we capture zero crossings for later analysis
-                               if(dest[i] < 127) dest[i] = 0; else dest[i] = 1;
-                               i++;
-                               if (ledcontrol)
-                                       LED_D_OFF();
-                               if(i >= m) {
-                                       break;
-                               }
-                       }
-               }
-
-               // FSK demodulator
-
-               // sync to first lo-hi transition
-               for( idx=1; idx<m; idx++) {
-                       if (dest[idx-1]<dest[idx])
-                               lastval=idx;
-                               break;
-               }
-               WDT_HIT();
-
-               // count cycles between consecutive lo-hi transitions, there should be either 8 (fc/8)
-               // or 10 (fc/10) cycles but in practice due to noise etc we may end up with with anywhere
-               // between 7 to 11 cycles so fuzz it by treat anything <9 as 8 and anything else as 10
-               for( i=0; idx<m; idx++) {
-                       if (dest[idx-1]<dest[idx]) {
-                               dest[i]=idx-lastval;
-                               if (dest[i] <= 8) {
-                                               dest[i]=1;
-                               } else {
-                                               dest[i]=0;
-                               }
-
-                               lastval=idx;
-                               i++;
-                       }
-               }
-               m=i;
-               WDT_HIT();
-
-               // we now have a set of cycle counts, loop over previous results and aggregate data into bit patterns
-               lastval=dest[0];
-               idx=0;
-               i=0;
-               n=0;
-               for( idx=0; idx<m; idx++) {
-                       if (dest[idx]==lastval) {
-                               n++;
-                       } else {
-                               // a bit time is five fc/10 or six fc/8 cycles so figure out how many bits a pattern width represents,
-                               // an extra fc/8 pattern preceeds every 4 bits (about 200 cycles) just to complicate things but it gets
-                               // swallowed up by rounding
-                               // expected results are 1 or 2 bits, any more and it's an invalid manchester encoding
-                               // special start of frame markers use invalid manchester states (no transitions) by using sequences
-                               // like 111000
-                               if (dest[idx-1]) {
-                                       n=(n+1)/6;                      // fc/8 in sets of 6
-                               } else {
-                                       n=(n+1)/5;                      // fc/10 in sets of 5
-                               }
-                               switch (n) {                    // stuff appropriate bits in buffer
-                                       case 0:
-                                       case 1: // one bit
-                                               dest[i++]=dest[idx-1];
-                                               break;
-                                       case 2: // two bits
-                                               dest[i++]=dest[idx-1];
-                                               dest[i++]=dest[idx-1];
-                                               break;
-                                       case 3: // 3 bit start of frame markers
-                                               dest[i++]=dest[idx-1];
-                                               dest[i++]=dest[idx-1];
-                                               dest[i++]=dest[idx-1];
-                                               break;
-                                       // When a logic 0 is immediately followed by the start of the next transmisson
-                                       // (special pattern) a pattern of 4 bit duration lengths is created.
-                                       case 4:
-                                               dest[i++]=dest[idx-1];
-                                               dest[i++]=dest[idx-1];
-                                               dest[i++]=dest[idx-1];
-                                               dest[i++]=dest[idx-1];
-                                               break;
-                                       default:        // this shouldn't happen, don't stuff any bits
-                                               break;
-                               }
-                               n=0;
-                               lastval=dest[idx];
-                       }
-               }
-               m=i;
-               WDT_HIT();
-
-               // 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
-               for( idx=0; idx<m-6; idx++) {
-                       // search for a start of frame marker
-                       if ( dest[idx] && dest[idx+1] && dest[idx+2] && (!dest[idx+3]) && (!dest[idx+4]) && (!dest[idx+5]) )
-                       {
-                               found=1;
-                               idx+=6;
-                               if (found && (hi|lo)) {
-                                       DbpString("TAG ID");
-                                       DbpIntegers(hi, lo, (lo>>1)&0xffff);
-                                       /* if we're only looking for one tag */
-                                       if (findone)
-                                       {
-                                               *high = hi;
-                                               *low = lo;
-                                               return;
-                                       }
-                                       hi=0;
-                                       lo=0;
-                                       found=0;
-                               }
-                       }
-                       if (found) {
-                               if (dest[idx] && (!dest[idx+1]) ) {
-                                       hi=(hi<<1)|(lo>>31);
-                                       lo=(lo<<1)|0;
-                               } else if ( (!dest[idx]) && dest[idx+1]) {
-                                       hi=(hi<<1)|(lo>>31);
-                                       lo=(lo<<1)|1;
-                               } else {
-                                       found=0;
-                                       hi=0;
-                                       lo=0;
-                               }
-                               idx++;
-                       }
-                       if ( dest[idx] && dest[idx+1] && dest[idx+2] && (!dest[idx+3]) && (!dest[idx+4]) && (!dest[idx+5]) )
-                       {
-                               found=1;
-                               idx+=6;
-                               if (found && (hi|lo)) {
-                                       DbpString("TAG ID");
-                                       DbpIntegers(hi, lo, (lo>>1)&0xffff);
-                                       /* if we're only looking for one tag */
-                                       if (findone)
-                                       {
-                                               *high = hi;
-                                               *low = lo;
-                                               return;
-                                       }
-                                       hi=0;
-                                       lo=0;
-                                       found=0;
-                               }
-                       }
-               }
-               WDT_HIT();
-       }
-}

 
 void SimulateTagHfListen(void)
 {
 
 void SimulateTagHfListen(void)
 {

-       BYTE *dest = (BYTE *)BigBuf;
-       int n = sizeof(BigBuf);
-       BYTE v = 0;
+       // ToDo: historically this used the free buffer, which was 2744 Bytes long. 
+       // There might be a better size to be defined:
+       #define HF_14B_SNOOP_BUFFER_SIZE 2744
+       uint8_t *dest = BigBuf_malloc(HF_14B_SNOOP_BUFFER_SIZE);
+       uint8_t v = 0;

        int i;
        int p = 0;
 
        // We're using this mode just so that I can test it out; the simulated
        // tag mode would work just as well and be simpler.
        int i;
        int p = 0;
 
        // We're using this mode just so that I can test it out; the simulated
        // tag mode would work just as well and be simpler.

+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ | FPGA_HF_READER_RX_XCORR_SNOOP);
 
        // We need to listen to the high-frequency, peak-detected path.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ | FPGA_HF_READER_RX_XCORR_SNOOP);
 
        // We need to listen to the high-frequency, peak-detected path.


@@ -730,11 +272,11 @@ void SimulateTagHfListen(void)
 
        i = 0;
        for(;;) {
 
        i = 0;
        for(;;) {

-               if(SSC_STATUS & (SSC_STATUS_TX_READY)) {
-                       SSC_TRANSMIT_HOLDING = 0xff;
+               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+                       AT91C_BASE_SSC->SSC_THR = 0xff;

                }
                }

-               if(SSC_STATUS & (SSC_STATUS_RX_READY)) {
-                       BYTE r = (BYTE)SSC_RECEIVE_HOLDING;
+               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+                       uint8_t r = (uint8_t)AT91C_BASE_SSC->SSC_RHR;

 
                        v <<= 1;
                        if(r & 1) {
 
                        v <<= 1;
                        if(r & 1) {


@@ -748,7 +290,7 @@ void SimulateTagHfListen(void)
                                p = 0;
                                i++;
 
                                p = 0;
                                i++;
 

-                               if(i >= n) {
+                               if(i >= HF_14B_SNOOP_BUFFER_SIZE) {

                                        break;
                                }
                        }
                                        break;
                                }
                        }


@@ -757,85 +299,636 @@ void SimulateTagHfListen(void)
        DbpString("simulate tag (now type bitsamples)");
 }
 
        DbpString("simulate tag (now type bitsamples)");
 }
 

-void UsbPacketReceived(BYTE *packet, int len)
+void ReadMem(int addr)

 {
 {

-       UsbCommand *c = (UsbCommand *)packet;
+       const uint8_t *data = ((uint8_t *)addr);

 
 

-       switch(c->cmd) {
-               case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K:
-                       AcquireRawAdcSamples125k(c->ext1);
-                       break;
+       Dbprintf("%x: %02x %02x %02x %02x %02x %02x %02x %02x",
+               addr, data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7]);
+}

 
 

-               case CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K:
-                       ModThenAcquireRawAdcSamples125k(c->ext1,c->ext2,c->ext3,c->d.asBytes);
-                       break;
+/* osimage version information is linked in */
+extern struct version_information version_information;
+/* bootrom version information is pointed to from _bootphase1_version_pointer */
+extern char *_bootphase1_version_pointer, _flash_start, _flash_end;
+void SendVersion(void)
+{
+       char temp[512]; /* Limited data payload in USB packets */
+       DbpString("Prox/RFID mark3 RFID instrument");
+
+       /* Try to find the bootrom version information. Expect to find a pointer at
+        * symbol _bootphase1_version_pointer, perform slight sanity checks on the
+        * pointer, then use it.
+        */
+       char *bootrom_version = *(char**)&_bootphase1_version_pointer;
+       if( bootrom_version < &_flash_start || bootrom_version >= &_flash_end ) {
+               DbpString("bootrom version information appears invalid");
+       } else {
+               FormatVersionInformation(temp, sizeof(temp), "bootrom: ", bootrom_version);
+               DbpString(temp);
+       }

 
 

-               case CMD_ACQUIRE_RAW_BITS_TI_TYPE:
-                       AcquireRawBitsTI();
-                       break;
+       FormatVersionInformation(temp, sizeof(temp), "os: ", &version_information);
+       DbpString(temp);

 
 

-               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693:
-                       AcquireRawAdcSamplesIso15693();
-                       break;
+       FpgaGatherVersion(temp, sizeof(temp));
+       DbpString(temp);
+       // Send Chip ID
+       cmd_send(CMD_ACK,*(AT91C_DBGU_CIDR),0,0,NULL,0);
+}

 
 

-               case CMD_BUFF_CLEAR:
-                       BufferClear();
-                       break;
+#ifdef WITH_LF
+// samy's sniff and repeat routine
+void SamyRun()
+{
+       DbpString("Stand-alone mode! No PC necessary.");
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);

 
 

-               case CMD_READER_ISO_15693:
-                       ReaderIso15693(c->ext1);
-                       break;
+       // 3 possible options? no just 2 for now
+#define OPTS 2

 
 

-               case CMD_SIMTAG_ISO_15693:
-                       SimTagIso15693(c->ext1);
-                       break;
+       int high[OPTS], low[OPTS];

 
 

-               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443:
-                       AcquireRawAdcSamplesIso14443(c->ext1);
-                       break;
+       // Oooh pretty -- notify user we're in elite samy mode now
+       LED(LED_RED,    200);
+       LED(LED_ORANGE, 200);
+       LED(LED_GREEN,  200);
+       LED(LED_ORANGE, 200);
+       LED(LED_RED,    200);
+       LED(LED_ORANGE, 200);
+       LED(LED_GREEN,  200);
+       LED(LED_ORANGE, 200);
+       LED(LED_RED,    200);

 
 

-               case CMD_READ_SRI512_TAG:
-                       ReadSRI512Iso14443(c->ext1);
-                       break;
+       int selected = 0;
+       int playing = 0;
+       int cardRead = 0;

 
 

-               case CMD_READER_ISO_14443a:
-                       ReaderIso14443a(c->ext1);
-                       break;
+       // Turn on selected LED
+       LED(selected + 1, 0);

 
 

-               case CMD_SNOOP_ISO_14443:
-                       SnoopIso14443();
-                       break;
+       for (;;)
+       {
+               usb_poll();
+    WDT_HIT();

 
 

-               case CMD_SNOOP_ISO_14443a:
-                       SnoopIso14443a();
-                       break;
+               // Was our button held down or pressed?
+               int button_pressed = BUTTON_HELD(1000);
+               SpinDelay(300);

 
 

-               case CMD_SIMULATE_TAG_HF_LISTEN:
-                       SimulateTagHfListen();
-                       break;
+               // Button was held for a second, begin recording
+               if (button_pressed > 0 && cardRead == 0)
+               {
+                       LEDsoff();
+                       LED(selected + 1, 0);
+                       LED(LED_RED2, 0);

 
 

-               case CMD_SIMULATE_TAG_ISO_14443:
-                       SimulateIso14443Tag();
-                       break;
+                       // record
+                       DbpString("Starting recording");

 
 

-               case CMD_SIMULATE_TAG_ISO_14443a:
-                       SimulateIso14443aTag(c->ext1, c->ext2);  // ## Simulate iso14443a tag - pass tag type & UID
-                       break;
+                       // wait for button to be released
+                       while(BUTTON_PRESS())
+                               WDT_HIT();

 
 

-               case CMD_MEASURE_ANTENNA_TUNING:
-                       MeasureAntennaTuning();
-                       break;
+                       /* need this delay to prevent catching some weird data */
+                       SpinDelay(500);

 
 

-               case CMD_LISTEN_READER_FIELD:
-                       ListenReaderField(c->ext1);
-                       break;
+                       CmdHIDdemodFSK(1, &high[selected], &low[selected], 0);
+                       Dbprintf("Recorded %x %x %x", selected, high[selected], low[selected]);

 
 

+                       LEDsoff();
+                       LED(selected + 1, 0);
+                       // Finished recording
+
+                       // If we were previously playing, set playing off
+                       // so next button push begins playing what we recorded
+                       playing = 0;
+                       
+                       cardRead = 1;
+       
+               }
+
+               else if (button_pressed > 0 && cardRead == 1)
+               {
+                                       LEDsoff();
+                                       LED(selected + 1, 0);
+                                       LED(LED_ORANGE, 0);
+
+                                       // record
+                                       Dbprintf("Cloning %x %x %x", selected, high[selected], low[selected]);
+
+                                       // wait for button to be released
+                                       while(BUTTON_PRESS())
+                                               WDT_HIT();
+
+                                       /* need this delay to prevent catching some weird data */
+                                       SpinDelay(500);
+
+                                       CopyHIDtoT55x7(high[selected], low[selected], 0, 0);
+                                       Dbprintf("Cloned %x %x %x", selected, high[selected], low[selected]);
+
+                                       LEDsoff();
+                                       LED(selected + 1, 0);
+                                       // Finished recording
+
+                                       // If we were previously playing, set playing off
+                                       // so next button push begins playing what we recorded
+                                       playing = 0;
+                                       
+                                       cardRead = 0;
+                       
+               }
+
+               // Change where to record (or begin playing)
+               else if (button_pressed)
+               {
+                       // Next option if we were previously playing
+                       if (playing)
+                               selected = (selected + 1) % OPTS;
+                       playing = !playing;
+
+                       LEDsoff();
+                       LED(selected + 1, 0);
+
+                       // Begin transmitting
+                       if (playing)
+                       {
+                               LED(LED_GREEN, 0);
+                               DbpString("Playing");
+                               // wait for button to be released
+                               while(BUTTON_PRESS())
+                                       WDT_HIT();
+                               Dbprintf("%x %x %x", selected, high[selected], low[selected]);
+                               CmdHIDsimTAG(high[selected], low[selected], 0);
+                               DbpString("Done playing");
+                               if (BUTTON_HELD(1000) > 0)
+                                       {
+                                       DbpString("Exiting");
+                                       LEDsoff();
+                                       return;
+                                       }
+
+                               /* We pressed a button so ignore it here with a delay */
+                               SpinDelay(300);
+
+                               // when done, we're done playing, move to next option
+                               selected = (selected + 1) % OPTS;
+                               playing = !playing;
+                               LEDsoff();
+                               LED(selected + 1, 0);
+                       }
+                       else
+                               while(BUTTON_PRESS())
+                                       WDT_HIT();
+               }
+       }
+}
+#endif
+
+/*
+OBJECTIVE
+Listen and detect an external reader. Determine the best location
+for the antenna.
+
+INSTRUCTIONS:
+Inside the ListenReaderField() function, there is two mode.
+By default, when you call the function, you will enter mode 1.
+If you press the PM3 button one time, you will enter mode 2.
+If you press the PM3 button a second time, you will exit the function.
+
+DESCRIPTION OF MODE 1:
+This mode just listens for an external reader field and lights up green
+for HF and/or red for LF. This is the original mode of the detectreader
+function.
+
+DESCRIPTION OF MODE 2:
+This mode will visually represent, using the LEDs, the actual strength of the
+current compared to the maximum current detected. Basically, once you know
+what kind of external reader is present, it will help you spot the best location to place
+your antenna. You will probably not get some good results if there is a LF and a HF reader
+at the same place! :-)
+
+LIGHT SCHEME USED:
+*/
+static const char LIGHT_SCHEME[] = {
+               0x0, /* ----     | No field detected */
+               0x1, /* X---     | 14% of maximum current detected */
+               0x2, /* -X--     | 29% of maximum current detected */
+               0x4, /* --X-     | 43% of maximum current detected */
+               0x8, /* ---X     | 57% of maximum current detected */
+               0xC, /* --XX     | 71% of maximum current detected */
+               0xE, /* -XXX     | 86% of maximum current detected */
+               0xF, /* XXXX     | 100% of maximum current detected */
+};
+static const int LIGHT_LEN = sizeof(LIGHT_SCHEME)/sizeof(LIGHT_SCHEME[0]);
+
+void ListenReaderField(int limit)
+{
+       int lf_av, lf_av_new, lf_baseline= 0, lf_max;
+       int hf_av, hf_av_new,  hf_baseline= 0, hf_max;
+       int mode=1, display_val, display_max, i;
+
+#define LF_ONLY                                                1
+#define HF_ONLY                                                2
+#define REPORT_CHANGE                          10    // report new values only if they have changed at least by REPORT_CHANGE
+
+
+       // switch off FPGA - we don't want to measure our own signal
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
+       LEDsoff();
+
+       lf_av = lf_max = AvgAdc(ADC_CHAN_LF);
+
+       if(limit != HF_ONLY) {
+               Dbprintf("LF 125/134kHz Baseline: %dmV", (MAX_ADC_LF_VOLTAGE * lf_av) >> 10);
+               lf_baseline = lf_av;
+       }
+
+       hf_av = hf_max = AvgAdc(ADC_CHAN_HF);
+
+       if (limit != LF_ONLY) {
+               Dbprintf("HF 13.56MHz Baseline: %dmV", (MAX_ADC_HF_VOLTAGE * hf_av) >> 10);
+               hf_baseline = hf_av;
+       }
+
+       for(;;) {
+               if (BUTTON_PRESS()) {
+                       SpinDelay(500);
+                       switch (mode) {
+                               case 1:
+                                       mode=2;
+                                       DbpString("Signal Strength Mode");
+                                       break;
+                               case 2:
+                               default:
+                                       DbpString("Stopped");
+                                       LEDsoff();
+                                       return;
+                                       break;
+                       }
+               }
+               WDT_HIT();
+
+               if (limit != HF_ONLY) {
+                       if(mode == 1) {
+                               if (abs(lf_av - lf_baseline) > REPORT_CHANGE) 
+                                       LED_D_ON();
+                               else
+                                       LED_D_OFF();
+                       }
+
+                       lf_av_new = AvgAdc(ADC_CHAN_LF);
+                       // see if there's a significant change
+                       if(abs(lf_av - lf_av_new) > REPORT_CHANGE) {
+                               Dbprintf("LF 125/134kHz Field Change: %5dmV", (MAX_ADC_LF_VOLTAGE * lf_av_new) >> 10);
+                               lf_av = lf_av_new;
+                               if (lf_av > lf_max)
+                                       lf_max = lf_av;
+                       }
+               }
+
+               if (limit != LF_ONLY) {
+                       if (mode == 1){
+                               if (abs(hf_av - hf_baseline) > REPORT_CHANGE)   
+                                       LED_B_ON();
+                               else
+                                       LED_B_OFF();
+                       }
+
+                       hf_av_new = AvgAdc(ADC_CHAN_HF);
+                       // see if there's a significant change
+                       if(abs(hf_av - hf_av_new) > REPORT_CHANGE) {
+                               Dbprintf("HF 13.56MHz Field Change: %5dmV", (MAX_ADC_HF_VOLTAGE * hf_av_new) >> 10);
+                               hf_av = hf_av_new;
+                               if (hf_av > hf_max)
+                                       hf_max = hf_av;
+                       }
+               }
+
+               if(mode == 2) {
+                       if (limit == LF_ONLY) {
+                               display_val = lf_av;
+                               display_max = lf_max;
+                       } else if (limit == HF_ONLY) {
+                               display_val = hf_av;
+                               display_max = hf_max;
+                       } else { /* Pick one at random */
+                               if( (hf_max - hf_baseline) > (lf_max - lf_baseline) ) {
+                                       display_val = hf_av;
+                                       display_max = hf_max;
+                               } else {
+                                       display_val = lf_av;
+                                       display_max = lf_max;
+                               }
+                       }
+                       for (i=0; i<LIGHT_LEN; i++) {
+                               if (display_val >= ((display_max/LIGHT_LEN)*i) && display_val <= ((display_max/LIGHT_LEN)*(i+1))) {
+                                       if (LIGHT_SCHEME[i] & 0x1) LED_C_ON(); else LED_C_OFF();
+                                       if (LIGHT_SCHEME[i] & 0x2) LED_A_ON(); else LED_A_OFF();
+                                       if (LIGHT_SCHEME[i] & 0x4) LED_B_ON(); else LED_B_OFF();
+                                       if (LIGHT_SCHEME[i] & 0x8) LED_D_ON(); else LED_D_OFF();
+                                       break;
+                               }
+                       }
+               }
+       }
+}
+
+void UsbPacketReceived(uint8_t *packet, int len)
+{
+       UsbCommand *c = (UsbCommand *)packet;
+
+//  Dbprintf("received %d bytes, with command: 0x%04x and args: %d %d %d",len,c->cmd,c->arg[0],c->arg[1],c->arg[2]);
+  
+       switch(c->cmd) {
+#ifdef WITH_LF
+               case CMD_SET_LF_SAMPLING_CONFIG:
+                       setSamplingConfig((sample_config *) c->d.asBytes);
+                       break;
+               case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K:
+                       cmd_send(CMD_ACK,SampleLF(),0,0,0,0);
+                       break;
+               case CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K:
+                       ModThenAcquireRawAdcSamples125k(c->arg[0],c->arg[1],c->arg[2],c->d.asBytes);
+                       break;
+               case CMD_LF_SNOOP_RAW_ADC_SAMPLES:
+                       cmd_send(CMD_ACK,SnoopLF(),0,0,0,0);
+                       break;

                case CMD_HID_DEMOD_FSK:
                case CMD_HID_DEMOD_FSK:

-                       CmdHIDdemodFSK(0, 0, 0, 1);                             // Demodulate HID tag
+                       CmdHIDdemodFSK(c->arg[0], 0, 0, 1);

                        break;
                        break;

-

                case CMD_HID_SIM_TAG:
                case CMD_HID_SIM_TAG:

-                       CmdHIDsimTAG(c->ext1, c->ext2, 1);                                      // Simulate HID tag by ID
+                       CmdHIDsimTAG(c->arg[0], c->arg[1], 1);
+                       break;
+               case CMD_FSK_SIM_TAG:
+                       CmdFSKsimTAG(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_ASK_SIM_TAG:
+                       CmdASKsimTag(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+                       case CMD_HID_CLONE_TAG:
+                       CopyHIDtoT55x7(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes[0]);
+                       break;
+               case CMD_IO_DEMOD_FSK:
+                       CmdIOdemodFSK(c->arg[0], 0, 0, 1);
+                       break;
+               case CMD_IO_CLONE_TAG:
+                       CopyIOtoT55x7(c->arg[0], c->arg[1], c->d.asBytes[0]);
+                       break;
+               case CMD_EM410X_DEMOD:
+                       CmdEM410xdemod(c->arg[0], 0, 0, 1);
+                       break;
+               case CMD_EM410X_WRITE_TAG:
+                       WriteEM410x(c->arg[0], c->arg[1], c->arg[2]);
+                       break;
+               case CMD_READ_TI_TYPE:
+                       ReadTItag();
+                       break;
+               case CMD_WRITE_TI_TYPE:
+                       WriteTItag(c->arg[0],c->arg[1],c->arg[2]);
+                       break;
+               case CMD_SIMULATE_TAG_125K:
+                       LED_A_ON();
+                       SimulateTagLowFrequency(c->arg[0], c->arg[1], 1);
+                       LED_A_OFF();
+                       break;
+               case CMD_LF_SIMULATE_BIDIR:
+                       SimulateTagLowFrequencyBidir(c->arg[0], c->arg[1]);
+                       break;
+               case CMD_INDALA_CLONE_TAG:
+                       CopyIndala64toT55x7(c->arg[0], c->arg[1]);                                      
+                       break;
+               case CMD_INDALA_CLONE_TAG_L:
+                       CopyIndala224toT55x7(c->d.asDwords[0], c->d.asDwords[1], c->d.asDwords[2], c->d.asDwords[3], c->d.asDwords[4], c->d.asDwords[5], c->d.asDwords[6]);
+                       break;
+               case CMD_T55XX_READ_BLOCK:
+                       T55xxReadBlock(c->arg[1], c->arg[2],c->d.asBytes[0]);
+                       break;
+               case CMD_T55XX_WRITE_BLOCK:
+                       T55xxWriteBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes[0]);
+                       break;
+               case CMD_T55XX_READ_TRACE:
+                       T55xxReadTrace();
+                       break;
+               case CMD_PCF7931_READ:
+                       ReadPCF7931();
+                       cmd_send(CMD_ACK,0,0,0,0,0);
+                       break;
+               case CMD_EM4X_READ_WORD:
+                       EM4xReadWord(c->arg[1], c->arg[2],c->d.asBytes[0]);
+                       break;
+               case CMD_EM4X_WRITE_WORD:
+                       EM4xWriteWord(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes[0]);
+                       break;
+#endif
+
+#ifdef WITH_HITAG
+               case CMD_SNOOP_HITAG: // Eavesdrop Hitag tag, args = type
+                       SnoopHitag(c->arg[0]);
+                       break;
+               case CMD_SIMULATE_HITAG: // Simulate Hitag tag, args = memory content
+                       SimulateHitagTag((bool)c->arg[0],(byte_t*)c->d.asBytes);
+                       break;
+               case CMD_READER_HITAG: // Reader for Hitag tags, args = type and function
+                       ReaderHitag((hitag_function)c->arg[0],(hitag_data*)c->d.asBytes);
+                       break;
+#endif
+            
+#ifdef WITH_ISO15693
+               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693:
+                       AcquireRawAdcSamplesIso15693();
+                       break;
+               case CMD_RECORD_RAW_ADC_SAMPLES_ISO_15693:
+                       RecordRawAdcSamplesIso15693();
+                       break;
+                       
+               case CMD_ISO_15693_COMMAND:
+                       DirectTag15693Command(c->arg[0],c->arg[1],c->arg[2],c->d.asBytes);
+                       break;
+                                       
+               case CMD_ISO_15693_FIND_AFI:
+                       BruteforceIso15693Afi(c->arg[0]);
+                       break;  
+                       
+               case CMD_ISO_15693_DEBUG:
+                       SetDebugIso15693(c->arg[0]);
+                       break;
+
+               case CMD_READER_ISO_15693:
+                       ReaderIso15693(c->arg[0]);
+                       break;
+               case CMD_SIMTAG_ISO_15693:
+                       SimTagIso15693(c->arg[0], c->d.asBytes);
+                       break;
+#endif
+
+#ifdef WITH_LEGICRF
+               case CMD_SIMULATE_TAG_LEGIC_RF:
+                       LegicRfSimulate(c->arg[0], c->arg[1], c->arg[2]);
+                       break;
+
+               case CMD_WRITER_LEGIC_RF:
+                       LegicRfWriter(c->arg[1], c->arg[0]);
+                       break;
+
+               case CMD_READER_LEGIC_RF:
+                       LegicRfReader(c->arg[0], c->arg[1]);
+                       break;
+#endif
+
+#ifdef WITH_ISO14443b
+               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443:
+                       AcquireRawAdcSamplesIso14443(c->arg[0]);
+                       break;
+               case CMD_READ_SRI512_TAG:
+                       ReadSTMemoryIso14443(0x0F);
+                       break;
+               case CMD_READ_SRIX4K_TAG:
+                       ReadSTMemoryIso14443(0x7F);
+                       break;
+               case CMD_SNOOP_ISO_14443:
+                       SnoopIso14443();
+                       break;
+               case CMD_SIMULATE_TAG_ISO_14443:
+                       SimulateIso14443Tag();
+                       break;
+               case CMD_ISO_14443B_COMMAND:
+                       SendRawCommand14443B(c->arg[0],c->arg[1],c->arg[2],c->d.asBytes);
+                       break;
+#endif
+
+#ifdef WITH_ISO14443a
+               case CMD_SNOOP_ISO_14443a:
+                       SnoopIso14443a(c->arg[0]);
+                       break;
+               case CMD_READER_ISO_14443a:
+                       ReaderIso14443a(c);
+                       break;
+               case CMD_SIMULATE_TAG_ISO_14443a:
+                       SimulateIso14443aTag(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);  // ## Simulate iso14443a tag - pass tag type & UID
+                       break;
+                       
+               case CMD_EPA_PACE_COLLECT_NONCE:
+                       EPA_PACE_Collect_Nonce(c);
+                       break;
+                       
+               case CMD_READER_MIFARE:
+            ReaderMifare(c->arg[0]);
+                       break;
+               case CMD_MIFARE_READBL:
+                       MifareReadBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFAREU_READBL:
+                       MifareUReadBlock(c->arg[0],c->d.asBytes);
+                       break;
+               case CMD_MIFAREUC_AUTH1:
+                       MifareUC_Auth1(c->arg[0],c->d.asBytes);
+                       break;
+               case CMD_MIFAREUC_AUTH2:
+                       MifareUC_Auth2(c->arg[0],c->d.asBytes);
+                       break;
+               case CMD_MIFAREU_READCARD:
+                       MifareUReadCard(c->arg[0], c->arg[1], c->d.asBytes);
+                       break;
+               case CMD_MIFAREUC_READCARD:
+                       MifareUReadCard(c->arg[0], c->arg[1], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_READSC:
+                       MifareReadSector(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_WRITEBL:
+                       MifareWriteBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFAREU_WRITEBL_COMPAT:
+                       MifareUWriteBlock(c->arg[0], c->d.asBytes);
+                        break;
+               case CMD_MIFAREU_WRITEBL:
+                        MifareUWriteBlock_Special(c->arg[0], c->d.asBytes);
+                        break;
+               case CMD_MIFARE_NESTED:
+                       MifareNested(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_CHKKEYS:
+                       MifareChkKeys(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_SIMULATE_MIFARE_CARD:
+                       Mifare1ksim(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               
+               // emulator
+               case CMD_MIFARE_SET_DBGMODE:
+                       MifareSetDbgLvl(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_EML_MEMCLR:
+                       MifareEMemClr(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_EML_MEMSET:
+                       MifareEMemSet(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_EML_MEMGET:
+                       MifareEMemGet(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_EML_CARDLOAD:
+                       MifareECardLoad(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+                       
+               // Work with "magic Chinese" card
+               case CMD_MIFARE_CSETBLOCK:
+                       MifareCSetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_CGETBLOCK:
+                       MifareCGetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_CIDENT:
+                       MifareCIdent();
+                       break;
+                       
+               // mifare sniffer
+               case CMD_MIFARE_SNIFFER:
+                       SniffMifare(c->arg[0]);
+                       break;
+
+#endif
+
+#ifdef WITH_ICLASS
+               // Makes use of ISO14443a FPGA Firmware
+               case CMD_SNOOP_ICLASS:
+                       SnoopIClass();
+                       break;
+               case CMD_SIMULATE_TAG_ICLASS:
+                       SimulateIClass(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_READER_ICLASS:
+                       ReaderIClass(c->arg[0]);
+                       break;
+               case CMD_READER_ICLASS_REPLAY:
+                   ReaderIClass_Replay(c->arg[0], c->d.asBytes);
+                       break;
+       case CMD_ICLASS_EML_MEMSET:
+                       emlSet(c->d.asBytes,c->arg[0], c->arg[1]);
+                       break;
+#endif
+
+               case CMD_SIMULATE_TAG_HF_LISTEN:
+                       SimulateTagHfListen();
+                       break;
+
+               case CMD_BUFF_CLEAR:
+                       BigBuf_Clear();
+                       break;
+
+               case CMD_MEASURE_ANTENNA_TUNING:
+                       MeasureAntennaTuning();
+                       break;
+
+               case CMD_MEASURE_ANTENNA_TUNING_HF:
+                       MeasureAntennaTuningHf();
+                       break;
+
+               case CMD_LISTEN_READER_FIELD:
+                       ListenReaderField(c->arg[0]);

                        break;
 
                case CMD_FPGA_MAJOR_MODE_OFF:           // ## FPGA Control
                        break;
 
                case CMD_FPGA_MAJOR_MODE_OFF:           // ## FPGA Control


@@ -845,413 +938,146 @@ void UsbPacketReceived(BYTE *packet, int len)
                        break;
 
                case CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K:
                        break;
 
                case CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K:

-               case CMD_DOWNLOAD_RAW_BITS_TI_TYPE: {
-                       UsbCommand n;
-                       if(c->cmd == CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K) {
-                               n.cmd = CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K;
-                       } else {
-                               n.cmd = CMD_DOWNLOADED_RAW_BITS_TI_TYPE;
+
+                       LED_B_ON();
+                       uint8_t *BigBuf = BigBuf_get_addr();
+                       for(size_t i=0; i<c->arg[1]; i += USB_CMD_DATA_SIZE) {
+                               size_t len = MIN((c->arg[1] - i),USB_CMD_DATA_SIZE);
+                               cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K,i,len,BigBuf_get_traceLen(),BigBuf+c->arg[0]+i,len);

                        }
                        }

-                       n.ext1 = c->ext1;
-                       memcpy(n.d.asDwords, BigBuf+c->ext1, 12*sizeof(DWORD));
-                       UsbSendPacket((BYTE *)&n, sizeof(n));
+                       // Trigger a finish downloading signal with an ACK frame
+                       cmd_send(CMD_ACK,1,0,BigBuf_get_traceLen(),getSamplingConfig(),sizeof(sample_config));
+                       LED_B_OFF();

                        break;
                        break;

-               }
+

                case CMD_DOWNLOADED_SIM_SAMPLES_125K: {
                case CMD_DOWNLOADED_SIM_SAMPLES_125K: {

-                       BYTE *b = (BYTE *)BigBuf;
-                       memcpy(b+c->ext1, c->d.asBytes, 48);
-                       break;
-               }
-               case CMD_SIMULATE_TAG_125K:
-                       LED_A_ON();
-                       SimulateTagLowFrequency(c->ext1, 1);
-                       LED_A_OFF();
-                       break;
-#ifdef WITH_LCD
-               case CMD_LCD_RESET:
-                       LCDReset();
+                       uint8_t *b = BigBuf_get_addr();
+                       memcpy(b+c->arg[0], c->d.asBytes, USB_CMD_DATA_SIZE);
+                       cmd_send(CMD_ACK,0,0,0,0,0);

                        break;
                        break;

-#endif
+               }       

                case CMD_READ_MEM:
                case CMD_READ_MEM:

-                       ReadMem(c->ext1);
+                       ReadMem(c->arg[0]);

                        break;
                        break;

+

                case CMD_SET_LF_DIVISOR:
                case CMD_SET_LF_DIVISOR:

-                       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, c->ext1);
+                       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+                       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, c->arg[0]);
+                       break;
+
+               case CMD_SET_ADC_MUX:
+                       switch(c->arg[0]) {
+                               case 0: SetAdcMuxFor(GPIO_MUXSEL_LOPKD); break;
+                               case 1: SetAdcMuxFor(GPIO_MUXSEL_LORAW); break;
+                               case 2: SetAdcMuxFor(GPIO_MUXSEL_HIPKD); break;
+                               case 3: SetAdcMuxFor(GPIO_MUXSEL_HIRAW); break;
+                       }
+                       break;
+
+               case CMD_VERSION:
+                       SendVersion();

                        break;
                        break;

+

 #ifdef WITH_LCD
 #ifdef WITH_LCD

+               case CMD_LCD_RESET:
+                       LCDReset();
+                       break;

                case CMD_LCD:
                case CMD_LCD:

-                       LCDSend(c->ext1);
+                       LCDSend(c->arg[0]);

                        break;
 #endif
                        break;
 #endif

-        case CMD_SETUP_WRITE:
+               case CMD_SETUP_WRITE:

                case CMD_FINISH_WRITE:
                case CMD_HARDWARE_RESET:
                case CMD_FINISH_WRITE:
                case CMD_HARDWARE_RESET:

-                       USB_D_PLUS_PULLUP_OFF();
+                       usb_disable();

                        SpinDelay(1000);
                        SpinDelay(1000);
                        SpinDelay(1000);
                        SpinDelay(1000);

-                       RSTC_CONTROL = RST_CONTROL_KEY | RST_CONTROL_PROCESSOR_RESET;
+                       AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;

                        for(;;) {
                                // We're going to reset, and the bootrom will take control.
                        }
                        break;
 
                        for(;;) {
                                // We're going to reset, and the bootrom will take control.
                        }
                        break;
 

+               case CMD_START_FLASH:
+                       if(common_area.flags.bootrom_present) {
+                               common_area.command = COMMON_AREA_COMMAND_ENTER_FLASH_MODE;
+                       }
+                       usb_disable();
+                       AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;
+                       for(;;);
+                       break;

 
 

+               case CMD_DEVICE_INFO: {
+                       uint32_t dev_info = DEVICE_INFO_FLAG_OSIMAGE_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_OS;
+                       if(common_area.flags.bootrom_present) dev_info |= DEVICE_INFO_FLAG_BOOTROM_PRESENT;
+                       cmd_send(CMD_DEVICE_INFO,dev_info,0,0,0,0);     
+                       break;
+               }

                default:
                default:

-                       DbpString("unknown command");
+                       Dbprintf("%s: 0x%04x","unknown command:",c->cmd);

                        break;
        }
 }
 
                        break;
        }
 }
 

-void ReadMem(int addr)
-{
-       const DWORD *data = ((DWORD *)addr);
-       int i;
-
-       DbpString("Reading memory at address");
-       DbpIntegers(0, 0, addr);
-       for (i = 0; i < 8; i+= 2)
-               DbpIntegers(0, data[i], data[i+1]);
-}
-
-void AppMain(void)
+void  __attribute__((noreturn)) AppMain(void)

 {
 {

-       memset(BigBuf,0,sizeof(BigBuf));

        SpinDelay(100);
        SpinDelay(100);

+       clear_trace();
+       if(common_area.magic != COMMON_AREA_MAGIC || common_area.version != 1) {
+               /* Initialize common area */
+               memset(&common_area, 0, sizeof(common_area));
+               common_area.magic = COMMON_AREA_MAGIC;
+               common_area.version = 1;
+       }
+       common_area.flags.osimage_present = 1;

 
        LED_D_OFF();
        LED_C_OFF();
        LED_B_OFF();
        LED_A_OFF();
 
 
        LED_D_OFF();
        LED_C_OFF();
        LED_B_OFF();
        LED_A_OFF();
 

-       UsbStart();
+       // Init USB device
+  usb_enable();

 
        // The FPGA gets its clock from us from PCK0 output, so set that up.
 
        // The FPGA gets its clock from us from PCK0 output, so set that up.

-       PIO_PERIPHERAL_B_SEL = (1 << GPIO_PCK0);
-       PIO_DISABLE = (1 << GPIO_PCK0);
-       PMC_SYS_CLK_ENABLE = PMC_SYS_CLK_PROGRAMMABLE_CLK_0;
+       AT91C_BASE_PIOA->PIO_BSR = GPIO_PCK0;
+       AT91C_BASE_PIOA->PIO_PDR = GPIO_PCK0;
+       AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_PCK0;

        // PCK0 is PLL clock / 4 = 96Mhz / 4 = 24Mhz
        // PCK0 is PLL clock / 4 = 96Mhz / 4 = 24Mhz

-       PMC_PROGRAMMABLE_CLK_0 = PMC_CLK_SELECTION_PLL_CLOCK |
-               PMC_CLK_PRESCALE_DIV_4;
-       PIO_OUTPUT_ENABLE = (1 << GPIO_PCK0);
+       AT91C_BASE_PMC->PMC_PCKR[0] = AT91C_PMC_CSS_PLL_CLK |
+               AT91C_PMC_PRES_CLK_4;
+       AT91C_BASE_PIOA->PIO_OER = GPIO_PCK0;

 
        // Reset SPI
 
        // Reset SPI

-       SPI_CONTROL = SPI_CONTROL_RESET;
+       AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;

        // Reset SSC
        // Reset SSC

-       SSC_CONTROL = SSC_CONTROL_RESET;
+       AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;

 
        // Load the FPGA image, which we have stored in our flash.
 
        // Load the FPGA image, which we have stored in our flash.

-       FpgaDownloadAndGo();
+       // (the HF version by default)
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

 
 

+       StartTickCount();
+       

 #ifdef WITH_LCD
 #ifdef WITH_LCD

-

        LCDInit();
        LCDInit();

-
-       // test text on different colored backgrounds
-       LCDString(" The quick brown fox  ",     &FONT6x8,1,1+8*0,WHITE  ,BLACK );
-       LCDString("  jumped over the     ",     &FONT6x8,1,1+8*1,BLACK  ,WHITE );
-       LCDString("     lazy dog.        ",     &FONT6x8,1,1+8*2,YELLOW ,RED   );
-       LCDString(" AaBbCcDdEeFfGgHhIiJj ",     &FONT6x8,1,1+8*3,RED    ,GREEN );
-       LCDString(" KkLlMmNnOoPpQqRrSsTt ",     &FONT6x8,1,1+8*4,MAGENTA,BLUE  );
-       LCDString("UuVvWwXxYyZz0123456789",     &FONT6x8,1,1+8*5,BLUE   ,YELLOW);
-       LCDString("`-=[]_;',./~!@#$%^&*()",     &FONT6x8,1,1+8*6,BLACK  ,CYAN  );
-       LCDString("     _+{}|:\\\"<>?     ",&FONT6x8,1,1+8*7,BLUE  ,MAGENTA);
-
-       // color bands
-       LCDFill(0, 1+8* 8, 132, 8, BLACK);
-       LCDFill(0, 1+8* 9, 132, 8, WHITE);
-       LCDFill(0, 1+8*10, 132, 8, RED);
-       LCDFill(0, 1+8*11, 132, 8, GREEN);
-       LCDFill(0, 1+8*12, 132, 8, BLUE);
-       LCDFill(0, 1+8*13, 132, 8, YELLOW);
-       LCDFill(0, 1+8*14, 132, 8, CYAN);
-       LCDFill(0, 1+8*15, 132, 8, MAGENTA);
-

 #endif
 
 #endif
 

+  byte_t rx[sizeof(UsbCommand)];
+       size_t rx_len;
+  

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

-               usbattached = UsbPoll(FALSE);
+    if (usb_poll()) {
+      rx_len = usb_read(rx,sizeof(UsbCommand));
+      if (rx_len) {
+        UsbPacketReceived(rx,rx_len);
+      }
+    }

                WDT_HIT();
 
                WDT_HIT();
 

+#ifdef WITH_LF

                if (BUTTON_HELD(1000) > 0)
                        SamyRun();
                if (BUTTON_HELD(1000) > 0)
                        SamyRun();

+#endif

        }
 }
        }
 }

-
-
-// samy's sniff and repeat routine
-void SamyRun()
-{
-       DbpString("Stand-alone mode! No PC necessary.");
-
-       // 3 possible options? no just 2 for now
-#define OPTS 2
-
-       int high[OPTS], low[OPTS];
-
-       // Oooh pretty -- notify user we're in elite samy mode now
-       LED(LED_RED,    200);
-       LED(LED_ORANGE, 200);
-       LED(LED_GREEN,  200);
-       LED(LED_ORANGE, 200);
-       LED(LED_RED,    200);
-       LED(LED_ORANGE, 200);
-       LED(LED_GREEN,  200);
-       LED(LED_ORANGE, 200);
-       LED(LED_RED,    200);
-
-       int selected = 0;
-       int playing = 0;
-
-       // Turn on selected LED
-       LED(selected + 1, 0);
-
-       for (;;)
-       {
-               usbattached = UsbPoll(FALSE);
-               WDT_HIT();
-
-               // Was our button held down or pressed?
-               int button_pressed = BUTTON_HELD(1000);
-               SpinDelay(300);
-
-               // Button was held for a second, begin recording
-               if (button_pressed > 0)
-               {
-                       LEDsoff();
-                       LED(selected + 1, 0);
-                       LED(LED_RED2, 0);
-
-                       // record
-                       DbpString("Starting recording");
-
-                       // wait for button to be released
-                       while(BUTTON_PRESS())
-                               WDT_HIT();
-
-                       /* need this delay to prevent catching some weird data */
-                       SpinDelay(500);
-
-                       CmdHIDdemodFSK(1, &high[selected], &low[selected], 0);
-                       DbpString("Recorded");
-                       DbpIntegers(selected, high[selected], low[selected]);
-
-                       LEDsoff();
-                       LED(selected + 1, 0);
-                       // Finished recording
-
-                       // If we were previously playing, set playing off
-                       // so next button push begins playing what we recorded
-                       playing = 0;
-               }
-
-               // Change where to record (or begin playing)
-               else if (button_pressed)
-               {
-                       // Next option if we were previously playing
-                       if (playing)
-                               selected = (selected + 1) % OPTS;
-                       playing = !playing;
-
-                       LEDsoff();
-                       LED(selected + 1, 0);
-
-                       // Begin transmitting
-                       if (playing)
-                       {
-                               LED(LED_GREEN, 0);
-                               DbpString("Playing");
-                               // wait for button to be released
-                               while(BUTTON_PRESS())
-                                       WDT_HIT();
-                               DbpIntegers(selected, high[selected], low[selected]);
-                               CmdHIDsimTAG(high[selected], low[selected], 0);
-                               DbpString("Done playing");
-                               if (BUTTON_HELD(1000) > 0)
-                                       {
-                                       DbpString("Exiting");
-                                       LEDsoff();
-                                       return;
-                                       }
-
-                               /* We pressed a button so ignore it here with a delay */
-                               SpinDelay(300);
-
-                               // when done, we're done playing, move to next option
-                               selected = (selected + 1) % OPTS;
-                               playing = !playing;
-                               LEDsoff();
-                               LED(selected + 1, 0);
-                       }
-                       else
-                               while(BUTTON_PRESS())
-                                       WDT_HIT();
-               }
-       }
-}
-
-
-/* \r
-OBJECTIVE\r
-Listen and detect an external reader. Determine the best location\r
-for the antenna.\r
-\r
-INSTRUCTIONS:\r
-Inside the ListenReaderField() function, there is two mode. \r
-By default, when you call the function, you will enter mode 1.\r
-If you press the PM3 button one time, you will enter mode 2.\r
-If you press the PM3 button a second time, you will exit the function.\r
-\r
-DESCRIPTION OF MODE 1:\r
-This mode just listens for an external reader field and lights up green \r
-for HF and/or red for LF. This is the original mode of the detectreader\r
-function.\r
-\r
-DESCRIPTION OF MODE 2:\r
-This mode will visually represent, using the LEDs, the actual strength of the\r
-current compared to the maximum current detected. Basically, once you know \r
-what kind of external reader is present, it will help you spot the best location to place\r
-your antenna. You will probably not get some good results if there is a LF and a HF reader\r
-at the same place! :-)\r
-\r
-LIGHT SCHEME USED:\r
-\r
-Light scheme | Descriptiong\r
-----------------------------------------------------\r
-    ----     | No field detected\r
-    X---     | 14% of maximum current detected\r
-    -X--     | 29% of maximum current detected\r
-    --X-     | 43% of maximum current detected\r
-    ---X     | 57% of maximum current detected\r
-    --XX     | 71% of maximum current detected\r
-    -XXX     | 86% of maximum current detected\r
-    XXXX     | 100% of maximum current detected\r
-\r
-TODO:\r
-Add the LF part for MODE 2\r
-\r
-*/\r
-void ListenReaderField(int limit)\r
-{\r
-       int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0;\r
-       int hf_av, hf_av_new,  hf_baseline= 0, hf_count= 0, hf_max;\r
-       int mode=1;\r
-\r
-#define LF_ONLY                1\r
-#define HF_ONLY                2\r
-\r
-       LED_A_OFF();\r
-       LED_B_OFF();\r
-       LED_C_OFF();\r
-       LED_D_OFF();\r
-\r
-       lf_av= ReadAdc(ADC_CHAN_LF);\r
-\r
-       if(limit != HF_ONLY) \r
-               {\r
-               DbpString("LF 125/134 Baseline:");\r
-               DbpIntegers(lf_av,0,0);\r
-               lf_baseline= lf_av;\r
-               }\r
-\r
-       hf_av=hf_max=ReadAdc(ADC_CHAN_HF);\r
-\r
-       if (limit != LF_ONLY) \r
-               {\r
-               DbpString("HF 13.56 Baseline:");\r
-               DbpIntegers(hf_av,0,0);\r
-               hf_baseline= hf_av;\r
-               }\r
-\r
-       for(;;) \r
-               {\r
-               if (BUTTON_PRESS()) {\r
-                       SpinDelay(500);\r
-                       switch (mode) {\r
-                               case 1:\r
-                                       mode=2;\r
-                                       DbpString("Signal Strength Mode");
-                                       break;\r
-                               case 2:\r
-                               default:\r
-                                       DbpString("Stopped");\r
-                                       LED_A_OFF();\r
-                                       LED_B_OFF();\r
-                                       LED_C_OFF();\r
-                                       LED_D_OFF();\r
-                                       return;\r
-                                       break;\r
-                       }\r
-               }\r
-               WDT_HIT();\r
-\r
-               if (limit != HF_ONLY) \r
-                       {\r
-                       if (abs(lf_av - lf_baseline) > 10)\r
-                               LED_D_ON();\r
-                       else\r
-                               LED_D_OFF();\r
-                       ++lf_count;\r
-                       lf_av_new= ReadAdc(ADC_CHAN_LF);\r
-                       // see if there's a significant change\r
-                       if(abs(lf_av - lf_av_new) > 10) \r
-                               {\r
-                               DbpString("LF 125/134 Field Change:");\r
-                               DbpIntegers(lf_av,lf_av_new,lf_count);\r
-                               lf_av= lf_av_new;\r
-                               lf_count= 0;\r
-                               }\r
-                       }\r
-\r
-               if (limit != LF_ONLY) \r
-                       {\r
-                       if (abs(hf_av - hf_baseline) > 10) {\r
-                               if (mode == 1)\r
-                                       LED_B_ON();\r
-                               if (mode == 2) {\r
-                                       if ( hf_av>(hf_max/7)*6) {\r
-                                               LED_A_ON();     LED_B_ON();     LED_C_ON();     LED_D_ON();\r
-                                       }\r
-                                       if ( (hf_av>(hf_max/7)*5) && (hf_av<=(hf_max/7)*6) ) {\r
-                                               LED_A_ON();     LED_B_ON();     LED_C_OFF(); LED_D_ON();\r
-                                       }\r
-                                       if ( (hf_av>(hf_max/7)*4) && (hf_av<=(hf_max/7)*5) ) {\r
-                                               LED_A_OFF(); LED_B_ON(); LED_C_OFF(); LED_D_ON();\r
-                                       }\r
-                                       if ( (hf_av>(hf_max/7)*3) && (hf_av<=(hf_max/7)*4) ) {\r
-                                               LED_A_OFF(); LED_B_OFF(); LED_C_OFF(); LED_D_ON();\r
-                                       }\r
-                                       if ( (hf_av>(hf_max/7)*2) && (hf_av<=(hf_max/7)*3) ) {\r
-                                               LED_A_OFF(); LED_B_ON(); LED_C_OFF(); LED_D_OFF();\r
-                                       }\r
-                                       if ( (hf_av>(hf_max/7)*1) && (hf_av<=(hf_max/7)*2) ) {\r
-                                               LED_A_ON();     LED_B_OFF(); LED_C_OFF(); LED_D_OFF();\r
-                                       }\r
-                                       if ( (hf_av>(hf_max/7)*0) && (hf_av<=(hf_max/7)*1) ) {\r
-                                               LED_A_OFF(); LED_B_OFF(); LED_C_ON(); LED_D_OFF();\r
-                                       }\r
-                               } \r
-                       } else {\r
-                               if (mode == 1) {\r
-                                       LED_B_OFF();\r
-                               }\r
-                               if (mode == 2) {\r
-                                       LED_A_OFF(); LED_B_OFF(); LED_C_OFF(); LED_D_OFF();\r
-                               }\r
-                       }\r
-\r
-                       ++hf_count;\r
-                       hf_av_new= ReadAdc(ADC_CHAN_HF);\r
-                       // see if there's a significant change\r
-                       if(abs(hf_av - hf_av_new) > 10) \r
-                               {\r
-                               DbpString("HF 13.56 Field Change:");\r
-                               DbpIntegers(hf_av,hf_av_new,hf_count);\r
-                               hf_av= hf_av_new;\r
-                               if (hf_av > hf_max)\r
-                                       hf_max = hf_av;\r
-                               hf_count= 0;\r
-                               }\r
-                       }\r
-               }\r
-}\r
-\r