]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/appmain.c
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[proxmark3-svn] / armsrc / appmain.c
index dec71dcde6d479c97d322bbee41abaac2db7b381..74448fe508fb395b8fa6443e169342ea67c11574 100644 (file)
@@ -5,7 +5,6 @@
 // Edits by Gerhard de Koning Gans, Sep 2007 (##)
 //-----------------------------------------------------------------------------
 
-
 #include <proxmark3.h>
 #include <stdlib.h>
 #include "apps.h"
@@ -14,9 +13,6 @@
 #include "LCD.h"
 #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;
 
 //=============================================================================
@@ -29,7 +25,6 @@ BYTE ToSend[256];
 int ToSendMax;
 static int ToSendBit;
 
-
 void BufferClear(void)
 {
        memset(BigBuf,0,sizeof(BigBuf));
@@ -99,175 +94,6 @@ void DbpIntegers(int x1, int x2, int x3)
        SpinDelay(50);
 }
 
-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);
-}
-
-// 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;
-
-       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);
-}
-
-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);
-               } 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);
-               }
-       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);
-}
-
-//-----------------------------------------------------------------------------
-// Read a TI-type tag. We assume that the tag has already been illuminated,
-// and that the exciting signal has been turned off. That means that we just
-// acquire the `one-bit DAC' bits from the comparator.
-//-----------------------------------------------------------------------------
-void AcquireTiType(void)
-{
-       int i;
-       int n = sizeof(BigBuf);
-
-       // 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);
-
-  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;
-
-  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();
-  }
-}
-
-void AcquireRawBitsTI(void)
-{
-       LED_D_ON();
-       // TI tags charge at 134.2Khz
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-
-       // Charge TI tag for 50ms.
-       SpinDelay(50);
-       LED_D_OFF();
-
-       LED_A_ON();
-       // Place FPGA in passthrough mode so as to stop driving the LF coil,
-       // in this mode the CROSS_LO line connects to SSP_DIN
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_PASSTHRU);
-
-       // get TI tag data into the buffer
-       AcquireTiType();
-
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LED_A_OFF();
-}
-
 //-----------------------------------------------------------------------------
 // Read an ADC channel and block till it completes, then return the result
 // in ADC units (0 to 1023). Also a routine to average 32 samples and
@@ -354,353 +180,6 @@ void MeasureAntennaTuning(void)
        UsbSendPacket((BYTE *)&c, sizeof(c));
 }
 
-void SimulateTagLowFrequency(int period, int ledcontrol)
-{
-       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;
-       }
-}
-
-// 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;
-               }
-       }
-
-       //      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;
-               }
-       }
-}
-
-// 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
-               }
-       }
-
-       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
-               }
-       }
-
-       if (ledcontrol)
-               LED_A_ON();
-       SimulateTagLowFrequency(n, ledcontrol);
-
-       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)
 {
        BYTE *dest = (BYTE *)BigBuf;
@@ -747,68 +226,352 @@ void SimulateTagHfListen(void)
        DbpString("simulate tag (now type bitsamples)");
 }
 
-void UsbPacketReceived(BYTE *packet, int len)
+void ReadMem(int addr)
 {
-       UsbCommand *c = (UsbCommand *)packet;
-
-       switch(c->cmd) {
-               case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K:
-                       AcquireRawAdcSamples125k(c->ext1);
-                       break;
+       const DWORD *data = ((DWORD *)addr);
+       int i;
 
-               case CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K:
-                       ModThenAcquireRawAdcSamples125k(c->ext1,c->ext2,c->ext3,c->d.asBytes);
-                       break;
+       DbpString("Reading memory at address");
+       DbpIntegers(0, 0, addr);
+       for (i = 0; i < 8; i+= 2)
+               DbpIntegers(0, data[i], data[i+1]);
+}
 
-               case CMD_ACQUIRE_RAW_BITS_TI_TYPE:
-                       AcquireRawBitsTI();
-                       break;
+// samy's sniff and repeat routine
+void SamyRun()
+{
+       DbpString("Stand-alone mode! No PC necessary.");
 
-               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693:
-                       AcquireRawAdcSamplesIso15693();
-                       break;
+       // 3 possible options? no just 2 for now
+#define OPTS 2
 
-               case CMD_BUFF_CLEAR:
-                       BufferClear();
-                       break;
+       int high[OPTS], low[OPTS];
 
-               case CMD_READER_ISO_15693:
-                       ReaderIso15693(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_SIMTAG_ISO_15693:
-                       SimTagIso15693(c->ext1);
-                       break;
+       int selected = 0;
+       int playing = 0;
 
-               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443:
-                       AcquireRawAdcSamplesIso14443(c->ext1);
-                       break;
+       // Turn on selected LED
+       LED(selected + 1, 0);
 
-               case CMD_READ_SRI512_TAG:
-                       ReadSRI512Iso14443(c->ext1);
-                       break;
+       for (;;)
+       {
+               usbattached = UsbPoll(FALSE);
+               WDT_HIT();
 
-               case CMD_READER_ISO_14443a:
-                       ReaderIso14443a(c->ext1);
-                       break;
+               // Was our button held down or pressed?
+               int button_pressed = BUTTON_HELD(1000);
+               SpinDelay(300);
 
-               case CMD_SNOOP_ISO_14443:
-                       SnoopIso14443();
-                       break;
+               // Button was held for a second, begin recording
+               if (button_pressed > 0)
+               {
+                       LEDsoff();
+                       LED(selected + 1, 0);
+                       LED(LED_RED2, 0);
 
-               case CMD_SNOOP_ISO_14443a:
-                       SnoopIso14443a();
-                       break;
+                       // record
+                       DbpString("Starting recording");
 
-               case CMD_SIMULATE_TAG_HF_LISTEN:
-                       SimulateTagHfListen();
-                       break;
+                       // wait for button to be released
+                       while(BUTTON_PRESS())
+                               WDT_HIT();
 
-               case CMD_SIMULATE_TAG_ISO_14443:
-                       SimulateIso14443Tag();
-                       break;
+                       /* need this delay to prevent catching some weird data */
+                       SpinDelay(500);
 
-               case CMD_SIMULATE_TAG_ISO_14443a:
+                       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();
+               }
+       }
+}
+
+
+/*
+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:
+
+Light scheme | Descriptiong
+----------------------------------------------------
+    ----     | No field detected
+    X---     | 14% of maximum current detected
+    -X--     | 29% of maximum current detected
+    --X-     | 43% of maximum current detected
+    ---X     | 57% of maximum current detected
+    --XX     | 71% of maximum current detected
+    -XXX     | 86% of maximum current detected
+    XXXX     | 100% of maximum current detected
+
+TODO:
+Add the LF part for MODE 2
+
+*/
+void ListenReaderField(int limit)
+{
+       int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0;
+       int hf_av, hf_av_new,  hf_baseline= 0, hf_count= 0, hf_max;
+       int mode=1;
+
+#define LF_ONLY                1
+#define HF_ONLY                2
+
+       LED_A_OFF();
+       LED_B_OFF();
+       LED_C_OFF();
+       LED_D_OFF();
+
+       lf_av= ReadAdc(ADC_CHAN_LF);
+
+       if(limit != HF_ONLY)
+               {
+               DbpString("LF 125/134 Baseline:");
+               DbpIntegers(lf_av,0,0);
+               lf_baseline= lf_av;
+               }
+
+       hf_av=hf_max=ReadAdc(ADC_CHAN_HF);
+
+       if (limit != LF_ONLY)
+               {
+               DbpString("HF 13.56 Baseline:");
+               DbpIntegers(hf_av,0,0);
+               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");
+                                       LED_A_OFF();
+                                       LED_B_OFF();
+                                       LED_C_OFF();
+                                       LED_D_OFF();
+                                       return;
+                                       break;
+                       }
+               }
+               WDT_HIT();
+
+               if (limit != HF_ONLY)
+                       {
+                       if (abs(lf_av - lf_baseline) > 10)
+                               LED_D_ON();
+                       else
+                               LED_D_OFF();
+                       ++lf_count;
+                       lf_av_new= ReadAdc(ADC_CHAN_LF);
+                       // see if there's a significant change
+                       if(abs(lf_av - lf_av_new) > 10)
+                               {
+                               DbpString("LF 125/134 Field Change:");
+                               DbpIntegers(lf_av,lf_av_new,lf_count);
+                               lf_av= lf_av_new;
+                               lf_count= 0;
+                               }
+                       }
+
+               if (limit != LF_ONLY)
+                       {
+                       if (abs(hf_av - hf_baseline) > 10) {
+                               if (mode == 1)
+                                       LED_B_ON();
+                               if (mode == 2) {
+                                       if ( hf_av>(hf_max/7)*6) {
+                                               LED_A_ON();     LED_B_ON();     LED_C_ON();     LED_D_ON();
+                                       }
+                                       if ( (hf_av>(hf_max/7)*5) && (hf_av<=(hf_max/7)*6) ) {
+                                               LED_A_ON();     LED_B_ON();     LED_C_OFF(); LED_D_ON();
+                                       }
+                                       if ( (hf_av>(hf_max/7)*4) && (hf_av<=(hf_max/7)*5) ) {
+                                               LED_A_OFF(); LED_B_ON(); LED_C_OFF(); LED_D_ON();
+                                       }
+                                       if ( (hf_av>(hf_max/7)*3) && (hf_av<=(hf_max/7)*4) ) {
+                                               LED_A_OFF(); LED_B_OFF(); LED_C_OFF(); LED_D_ON();
+                                       }
+                                       if ( (hf_av>(hf_max/7)*2) && (hf_av<=(hf_max/7)*3) ) {
+                                               LED_A_OFF(); LED_B_ON(); LED_C_OFF(); LED_D_OFF();
+                                       }
+                                       if ( (hf_av>(hf_max/7)*1) && (hf_av<=(hf_max/7)*2) ) {
+                                               LED_A_ON();     LED_B_OFF(); LED_C_OFF(); LED_D_OFF();
+                                       }
+                                       if ( (hf_av>(hf_max/7)*0) && (hf_av<=(hf_max/7)*1) ) {
+                                               LED_A_OFF(); LED_B_OFF(); LED_C_ON(); LED_D_OFF();
+                                       }
+                               }
+                       } else {
+                               if (mode == 1) {
+                                       LED_B_OFF();
+                               }
+                               if (mode == 2) {
+                                       LED_A_OFF(); LED_B_OFF(); LED_C_OFF(); LED_D_OFF();
+                               }
+                       }
+
+                       ++hf_count;
+                       hf_av_new= ReadAdc(ADC_CHAN_HF);
+                       // see if there's a significant change
+                       if(abs(hf_av - hf_av_new) > 10)
+                               {
+                               DbpString("HF 13.56 Field Change:");
+                               DbpIntegers(hf_av,hf_av_new,hf_count);
+                               hf_av= hf_av_new;
+                               if (hf_av > hf_max)
+                                       hf_max = hf_av;
+                               hf_count= 0;
+                               }
+                       }
+               }
+}
+
+void UsbPacketReceived(BYTE *packet, int len)
+{
+       UsbCommand *c = (UsbCommand *)packet;
+
+       switch(c->cmd) {
+               case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K:
+                       AcquireRawAdcSamples125k(c->ext1);
+                       break;
+
+               case CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K:
+                       ModThenAcquireRawAdcSamples125k(c->ext1,c->ext2,c->ext3,c->d.asBytes);
+                       break;
+
+               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693:
+                       AcquireRawAdcSamplesIso15693();
+                       break;
+
+               case CMD_BUFF_CLEAR:
+                       BufferClear();
+                       break;
+
+               case CMD_READER_ISO_15693:
+                       ReaderIso15693(c->ext1);
+                       break;
+
+               case CMD_SIMTAG_ISO_15693:
+                       SimTagIso15693(c->ext1);
+                       break;
+
+               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443:
+                       AcquireRawAdcSamplesIso14443(c->ext1);
+                       break;
+
+               case CMD_READ_SRI512_TAG:
+                       ReadSRI512Iso14443(c->ext1);
+                       break;
+
+               case CMD_READER_ISO_14443a:
+                       ReaderIso14443a(c->ext1);
+                       break;
+
+               case CMD_SNOOP_ISO_14443:
+                       SnoopIso14443();
+                       break;
+
+               case CMD_SNOOP_ISO_14443a:
+                       SnoopIso14443a();
+                       break;
+
+               case CMD_SIMULATE_TAG_HF_LISTEN:
+                       SimulateTagHfListen();
+                       break;
+
+               case CMD_SIMULATE_TAG_ISO_14443:
+                       SimulateIso14443Tag();
+                       break;
+
+               case CMD_SIMULATE_TAG_ISO_14443a:
                        SimulateIso14443aTag(c->ext1, c->ext2);  // ## Simulate iso14443a tag - pass tag type & UID
                        break;
 
@@ -834,8 +597,15 @@ void UsbPacketReceived(BYTE *packet, int len)
                        LED_D_OFF(); // LED D indicates field ON or OFF
                        break;
 
-               case CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K:
-               case CMD_DOWNLOAD_RAW_BITS_TI_TYPE: {
+               case CMD_READ_TI_TYPE:
+                       ReadTItag();
+                       break;
+
+               case CMD_WRITE_TI_TYPE:
+                       WriteTItag(c->ext1,c->ext2,c->ext3);
+                       break;
+
+               case CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K: {
                        UsbCommand n;
                        if(c->cmd == CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K) {
                                n.cmd = CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K;
@@ -857,11 +627,6 @@ void UsbPacketReceived(BYTE *packet, int len)
                        SimulateTagLowFrequency(c->ext1, 1);
                        LED_A_OFF();
                        break;
-#ifdef WITH_LCD
-               case CMD_LCD_RESET:
-                       LCDReset();
-                       break;
-#endif
                case CMD_READ_MEM:
                        ReadMem(c->ext1);
                        break;
@@ -869,11 +634,14 @@ void UsbPacketReceived(BYTE *packet, int len)
                        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, c->ext1);
                        break;
 #ifdef WITH_LCD
+               case CMD_LCD_RESET:
+                       LCDReset();
+                       break;
                case CMD_LCD:
                        LCDSend(c->ext1);
                        break;
 #endif
-        case CMD_SETUP_WRITE:
+               case CMD_SETUP_WRITE:
                case CMD_FINISH_WRITE:
                case CMD_HARDWARE_RESET:
                        USB_D_PLUS_PULLUP_OFF();
@@ -885,24 +653,12 @@ void UsbPacketReceived(BYTE *packet, int len)
                        }
                        break;
 
-
                default:
                        DbpString("unknown command");
                        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)
 {
        memset(BigBuf,0,sizeof(BigBuf));
@@ -966,199 +722,3 @@ void AppMain(void)
                        SamyRun();
        }
 }
-
-
-// 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();
-               }
-       }
-}
-
-
-// listen for external reader
-void ListenReaderField(int limit)
-{
-       int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0;
-       int hf_av, hf_av_new,  hf_baseline= 0, hf_count= 0;
-
-#define LF_ONLY                1
-#define HF_ONLY                2
-
-       LED_A_OFF();
-       LED_B_OFF();
-       LED_C_OFF();
-       LED_D_OFF();
-
-       lf_av= ReadAdc(ADC_CHAN_LF);
-
-       if(limit != HF_ONLY)
-               {
-               DbpString("LF 125/134 Baseline:");
-               DbpIntegers(lf_av,0,0);
-               lf_baseline= lf_av;
-               }
-
-       hf_av= ReadAdc(ADC_CHAN_HF);
-
-
-       if (limit != LF_ONLY)
-               {
-               DbpString("HF 13.56 Baseline:");
-               DbpIntegers(hf_av,0,0);
-               hf_baseline= hf_av;
-               }
-
-       for(;;)
-               {
-               if(BUTTON_PRESS())
-                       {
-                       DbpString("Stopped");
-                       LED_B_OFF();
-                       LED_D_OFF();
-                       return;
-                       }
-               WDT_HIT();
-
-
-               if (limit != HF_ONLY)
-                       {
-                       if (abs(lf_av - lf_baseline) > 10)
-                               LED_D_ON();
-                       else
-                               LED_D_OFF();
-                       ++lf_count;
-                       lf_av_new= ReadAdc(ADC_CHAN_LF);
-                       // see if there's a significant change
-                       if(abs(lf_av - lf_av_new) > 10)
-                               {
-                               DbpString("LF 125/134 Field Change:");
-                               DbpIntegers(lf_av,lf_av_new,lf_count);
-                               lf_av= lf_av_new;
-                               lf_count= 0;
-                               }
-                       }
-
-               if (limit != LF_ONLY)
-                       {
-                       if (abs(hf_av - hf_baseline) > 10)
-                               LED_B_ON();
-                       else
-                               LED_B_OFF();
-                       ++hf_count;
-                       hf_av_new= ReadAdc(ADC_CHAN_HF);
-                       // see if there's a significant change
-                       if(abs(hf_av - hf_av_new) > 10)
-                               {
-                               DbpString("HF 13.56 Field Change:");
-                               DbpIntegers(hf_av,hf_av_new,hf_count);
-                               hf_av= hf_av_new;
-                               hf_count= 0;
-                               }
-                       }
-               }
-}
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