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[proxmark3-svn] / armsrc / appmain.c
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-//-----------------------------------------------------------------------------\r
-// The main application code. This is the first thing called after start.c\r
-// executes.\r
-// Jonathan Westhues, Mar 2006\r
-// Edits by Gerhard de Koning Gans, Sep 2007 (##)\r
-//-----------------------------------------------------------------------------\r
-\r
-#include <proxmark3.h>\r
-#include <stdlib.h>\r
-#include "apps.h"\r
-#include "legicrf.h"\r
-#ifdef WITH_LCD\r
-#include "fonts.h"\r
-#include "LCD.h"\r
-#endif\r
-\r
-//=============================================================================\r
-// A buffer where we can queue things up to be sent through the FPGA, for\r
-// any purpose (fake tag, as reader, whatever). We go MSB first, since that\r
-// is the order in which they go out on the wire.\r
-//=============================================================================\r
-\r
-BYTE ToSend[256];\r
-int ToSendMax;\r
-static int ToSendBit;\r
-struct common_area common_area __attribute__((section(".commonarea")));\r
-\r
-void BufferClear(void)\r
-{\r
-       memset(BigBuf,0,sizeof(BigBuf));\r
-       DbpString("Buffer cleared");\r
-}\r
-\r
-void ToSendReset(void)\r
-{\r
-       ToSendMax = -1;\r
-       ToSendBit = 8;\r
-}\r
-\r
-void ToSendStuffBit(int b)\r
-{\r
-       if(ToSendBit >= 8) {\r
-               ToSendMax++;\r
-               ToSend[ToSendMax] = 0;\r
-               ToSendBit = 0;\r
-       }\r
-\r
-       if(b) {\r
-               ToSend[ToSendMax] |= (1 << (7 - ToSendBit));\r
-       }\r
-\r
-       ToSendBit++;\r
-\r
-       if(ToSendBit >= sizeof(ToSend)) {\r
-               ToSendBit = 0;\r
-               DbpString("ToSendStuffBit overflowed!");\r
-       }\r
-}\r
-\r
-//=============================================================================\r
-// Debug print functions, to go out over USB, to the usual PC-side client.\r
-//=============================================================================\r
-\r
-void DbpString(char *str)\r
-{\r
-       /* this holds up stuff unless we're connected to usb */\r
-       if (!UsbConnected())\r
-               return;\r
-\r
-       UsbCommand c;\r
-       c.cmd = CMD_DEBUG_PRINT_STRING;\r
-       c.ext1 = strlen(str);\r
-       memcpy(c.d.asBytes, str, c.ext1);\r
-\r
-       UsbSendPacket((BYTE *)&c, sizeof(c));\r
-       // TODO fix USB so stupid things like this aren't req'd\r
-       SpinDelay(50);\r
-}\r
-\r
-void DbpIntegers(int x1, int x2, int x3)\r
-{\r
-       /* this holds up stuff unless we're connected to usb */\r
-       if (!UsbConnected())\r
-               return;\r
-\r
-       UsbCommand c;\r
-       c.cmd = CMD_DEBUG_PRINT_INTEGERS;\r
-       c.ext1 = x1;\r
-       c.ext2 = x2;\r
-       c.ext3 = x3;\r
-\r
-       UsbSendPacket((BYTE *)&c, sizeof(c));\r
-       // XXX\r
-       SpinDelay(50);\r
-}\r
-\r
-//-----------------------------------------------------------------------------\r
-// Read an ADC channel and block till it completes, then return the result\r
-// in ADC units (0 to 1023). Also a routine to average 32 samples and\r
-// return that.\r
-//-----------------------------------------------------------------------------\r
-static int ReadAdc(int ch)\r
-{\r
-       DWORD d;\r
-\r
-       AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST;\r
-       AT91C_BASE_ADC->ADC_MR =\r
-               ADC_MODE_PRESCALE(32) |\r
-               ADC_MODE_STARTUP_TIME(16) |\r
-               ADC_MODE_SAMPLE_HOLD_TIME(8);\r
-       AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ch);\r
-\r
-       AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;\r
-       while(!(AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ch)))\r
-               ;\r
-       d = AT91C_BASE_ADC->ADC_CDR[ch];\r
-\r
-       return d;\r
-}\r
-\r
-static int AvgAdc(int ch)\r
-{\r
-       int i;\r
-       int a = 0;\r
-\r
-       for(i = 0; i < 32; i++) {\r
-               a += ReadAdc(ch);\r
-       }\r
-\r
-       return (a + 15) >> 5;\r
-}\r
-\r
-void MeasureAntennaTuning(void)\r
-{\r
-       BYTE *dest = (BYTE *)BigBuf;\r
-       int i, ptr = 0, adcval = 0, peak = 0, peakv = 0, peakf = 0;;\r
-       int vLf125 = 0, vLf134 = 0, vHf = 0;    // in mV\r
-\r
-       UsbCommand c;\r
-\r
-       DbpString("Measuring antenna characteristics, please wait.");\r
-       memset(BigBuf,0,sizeof(BigBuf));\r
-\r
-/*\r
- * Sweeps the useful LF range of the proxmark from\r
- * 46.8kHz (divisor=255) to 600kHz (divisor=19) and\r
- * read the voltage in the antenna, the result left\r
- * in the buffer is a graph which should clearly show\r
- * the resonating frequency of your LF antenna\r
- * ( hopefully around 95 if it is tuned to 125kHz!)\r
- */\r
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);\r
-       for (i=255; i>19; i--) {\r
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, i);\r
-               SpinDelay(20);\r
-               // Vref = 3.3V, and a 10000:240 voltage divider on the input\r
-               // can measure voltages up to 137500 mV\r
-               adcval = ((137500 * AvgAdc(ADC_CHAN_LF)) >> 10);\r
-               if (i==95)      vLf125 = adcval; // voltage at 125Khz\r
-               if (i==89)      vLf134 = adcval; // voltage at 134Khz\r
-\r
-               dest[i] = adcval>>8; // scale int to fit in byte for graphing purposes\r
-               if(dest[i] > peak) {\r
-                       peakv = adcval;\r
-                       peak = dest[i];\r
-                       peakf = i;\r
-                       ptr = i;\r
-               }\r
-       }\r
-\r
-       // Let the FPGA drive the high-frequency antenna around 13.56 MHz.\r
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);\r
-       SpinDelay(20);\r
-       // Vref = 3300mV, and an 10:1 voltage divider on the input\r
-       // can measure voltages up to 33000 mV\r
-       vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10;\r
-\r
-       c.cmd = CMD_MEASURED_ANTENNA_TUNING;\r
-       c.ext1 = (vLf125 << 0) | (vLf134 << 16);\r
-       c.ext2 = vHf;\r
-       c.ext3 = peakf | (peakv << 16);\r
-       UsbSendPacket((BYTE *)&c, sizeof(c));\r
-}\r
-\r
-void SimulateTagHfListen(void)\r
-{\r
-       BYTE *dest = (BYTE *)BigBuf;\r
-       int n = sizeof(BigBuf);\r
-       BYTE v = 0;\r
-       int i;\r
-       int p = 0;\r
-\r
-       // We're using this mode just so that I can test it out; the simulated\r
-       // tag mode would work just as well and be simpler.\r
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ | FPGA_HF_READER_RX_XCORR_SNOOP);\r
-\r
-       // We need to listen to the high-frequency, peak-detected path.\r
-       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);\r
-\r
-       FpgaSetupSsc();\r
-\r
-       i = 0;\r
-       for(;;) {\r
-               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {\r
-                       AT91C_BASE_SSC->SSC_THR = 0xff;\r
-               }\r
-               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {\r
-                       BYTE r = (BYTE)AT91C_BASE_SSC->SSC_RHR;\r
-\r
-                       v <<= 1;\r
-                       if(r & 1) {\r
-                               v |= 1;\r
-                       }\r
-                       p++;\r
-\r
-                       if(p >= 8) {\r
-                               dest[i] = v;\r
-                               v = 0;\r
-                               p = 0;\r
-                               i++;\r
-\r
-                               if(i >= n) {\r
-                                       break;\r
-                               }\r
-                       }\r
-               }\r
-       }\r
-       DbpString("simulate tag (now type bitsamples)");\r
-}\r
-\r
-void ReadMem(int addr)\r
-{\r
-       const DWORD *data = ((DWORD *)addr);\r
-       int i;\r
-\r
-       DbpString("Reading memory at address");\r
-       DbpIntegers(0, 0, addr);\r
-       for (i = 0; i < 8; i+= 2)\r
-               DbpIntegers(0, data[i], data[i+1]);\r
-}\r
-\r
-/* osimage version information is linked in */\r
-extern struct version_information version_information;\r
-/* bootrom version information is pointed to from _bootphase1_version_pointer */\r
-extern char *_bootphase1_version_pointer, _flash_start, _flash_end;\r
-void SendVersion(void)\r
-{\r
-       char temp[48]; /* Limited data payload in USB packets */\r
-       DbpString("Prox/RFID mark3 RFID instrument");\r
-       \r
-       /* Try to find the bootrom version information. Expect to find a pointer at \r
-        * symbol _bootphase1_version_pointer, perform slight sanity checks on the\r
-        * pointer, then use it.\r
-        */\r
-       char *bootrom_version = *(char**)&_bootphase1_version_pointer;\r
-       if( bootrom_version < &_flash_start || bootrom_version >= &_flash_end ) {\r
-               DbpString("bootrom version information appears invalid");\r
-       } else {\r
-               FormatVersionInformation(temp, sizeof(temp), "bootrom: ", bootrom_version);\r
-               DbpString(temp);\r
-       }\r
-       \r
-       FormatVersionInformation(temp, sizeof(temp), "os: ", &version_information);\r
-       DbpString(temp);\r
-       \r
-       FpgaGatherVersion(temp, sizeof(temp));\r
-       DbpString(temp);\r
-}\r
-\r
-#ifdef WITH_LF\r
-// samy's sniff and repeat routine\r
-void SamyRun()\r
-{\r
-       DbpString("Stand-alone mode! No PC necessary.");\r
-\r
-       // 3 possible options? no just 2 for now\r
-#define OPTS 2\r
-\r
-       int high[OPTS], low[OPTS];\r
-\r
-       // Oooh pretty -- notify user we're in elite samy mode now\r
-       LED(LED_RED,    200);\r
-       LED(LED_ORANGE, 200);\r
-       LED(LED_GREEN,  200);\r
-       LED(LED_ORANGE, 200);\r
-       LED(LED_RED,    200);\r
-       LED(LED_ORANGE, 200);\r
-       LED(LED_GREEN,  200);\r
-       LED(LED_ORANGE, 200);\r
-       LED(LED_RED,    200);\r
-\r
-       int selected = 0;\r
-       int playing = 0;\r
-\r
-       // Turn on selected LED\r
-       LED(selected + 1, 0);\r
-\r
-       for (;;)\r
-       {\r
-               UsbPoll(FALSE);\r
-               WDT_HIT();\r
-\r
-               // Was our button held down or pressed?\r
-               int button_pressed = BUTTON_HELD(1000);\r
-               SpinDelay(300);\r
-\r
-               // Button was held for a second, begin recording\r
-               if (button_pressed > 0)\r
-               {\r
-                       LEDsoff();\r
-                       LED(selected + 1, 0);\r
-                       LED(LED_RED2, 0);\r
-\r
-                       // record\r
-                       DbpString("Starting recording");\r
-\r
-                       // wait for button to be released\r
-                       while(BUTTON_PRESS())\r
-                               WDT_HIT();\r
-\r
-                       /* need this delay to prevent catching some weird data */\r
-                       SpinDelay(500);\r
-\r
-                       CmdHIDdemodFSK(1, &high[selected], &low[selected], 0);\r
-                       DbpString("Recorded");\r
-                       DbpIntegers(selected, high[selected], low[selected]);\r
-\r
-                       LEDsoff();\r
-                       LED(selected + 1, 0);\r
-                       // Finished recording\r
-\r
-                       // If we were previously playing, set playing off\r
-                       // so next button push begins playing what we recorded\r
-                       playing = 0;\r
-               }\r
-\r
-               // Change where to record (or begin playing)\r
-               else if (button_pressed)\r
-               {\r
-                       // Next option if we were previously playing\r
-                       if (playing)\r
-                               selected = (selected + 1) % OPTS;\r
-                       playing = !playing;\r
-\r
-                       LEDsoff();\r
-                       LED(selected + 1, 0);\r
-\r
-                       // Begin transmitting\r
-                       if (playing)\r
-                       {\r
-                               LED(LED_GREEN, 0);\r
-                               DbpString("Playing");\r
-                               // wait for button to be released\r
-                               while(BUTTON_PRESS())\r
-                                       WDT_HIT();\r
-                               DbpIntegers(selected, high[selected], low[selected]);\r
-                               CmdHIDsimTAG(high[selected], low[selected], 0);\r
-                               DbpString("Done playing");\r
-                               if (BUTTON_HELD(1000) > 0)\r
-                                       {\r
-                                       DbpString("Exiting");\r
-                                       LEDsoff();\r
-                                       return;\r
-                                       }\r
-\r
-                               /* We pressed a button so ignore it here with a delay */\r
-                               SpinDelay(300);\r
-\r
-                               // when done, we're done playing, move to next option\r
-                               selected = (selected + 1) % OPTS;\r
-                               playing = !playing;\r
-                               LEDsoff();\r
-                               LED(selected + 1, 0);\r
-                       }\r
-                       else\r
-                               while(BUTTON_PRESS())\r
-                                       WDT_HIT();\r
-               }\r
-       }\r
-}\r
-#endif\r
-\r
-/*\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
-static const char LIGHT_SCHEME[] = {\r
-               0x0, /* ----     | No field detected */\r
-               0x1, /* X---     | 14% of maximum current detected */\r
-               0x2, /* -X--     | 29% of maximum current detected */\r
-               0x4, /* --X-     | 43% of maximum current detected */\r
-               0x8, /* ---X     | 57% of maximum current detected */\r
-               0xC, /* --XX     | 71% of maximum current detected */\r
-               0xE, /* -XXX     | 86% of maximum current detected */\r
-               0xF, /* XXXX     | 100% of maximum current detected */\r
-};\r
-static const int LIGHT_LEN = sizeof(LIGHT_SCHEME)/sizeof(LIGHT_SCHEME[0]);\r
-\r
-void ListenReaderField(int limit)\r
-{\r
-       int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0, lf_max;\r
-       int hf_av, hf_av_new,  hf_baseline= 0, hf_count= 0, hf_max;\r
-       int mode=1, display_val, display_max, i;\r
-\r
-#define LF_ONLY                1\r
-#define HF_ONLY                2\r
-\r
-       LEDsoff();\r
-\r
-       lf_av=lf_max=ReadAdc(ADC_CHAN_LF);\r
-\r
-       if(limit != HF_ONLY) {\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
-               DbpString("HF 13.56 Baseline:");\r
-               DbpIntegers(hf_av,0,0);\r
-               hf_baseline= hf_av;\r
-       }\r
-\r
-       for(;;) {\r
-               if (BUTTON_PRESS()) {\r
-                       SpinDelay(500);\r
-                       switch (mode) {\r
-                               case 1:\r
-                                       mode=2;\r
-                                       DbpString("Signal Strength Mode");\r
-                                       break;\r
-                               case 2:\r
-                               default:\r
-                                       DbpString("Stopped");\r
-                                       LEDsoff();\r
-                                       return;\r
-                                       break;\r
-                       }\r
-               }\r
-               WDT_HIT();\r
-\r
-               if (limit != HF_ONLY) {\r
-                       if(mode==1) {\r
-                               if (abs(lf_av - lf_baseline) > 10) LED_D_ON();\r
-                               else                               LED_D_OFF();\r
-                       }\r
-                       \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
-                               DbpString("LF 125/134 Field Change:");\r
-                               DbpIntegers(lf_av,lf_av_new,lf_count);\r
-                               lf_av= lf_av_new;\r
-                               if (lf_av > lf_max)\r
-                                       lf_max = lf_av;\r
-                               lf_count= 0;\r
-                       }\r
-               }\r
-\r
-               if (limit != LF_ONLY) {\r
-                       if (mode == 1){\r
-                               if (abs(hf_av - hf_baseline) > 10) LED_B_ON();\r
-                               else                               LED_B_OFF();\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
-                               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
-               if(mode == 2) {\r
-                       if (limit == LF_ONLY) {\r
-                               display_val = lf_av;\r
-                               display_max = lf_max;\r
-                       } else if (limit == HF_ONLY) {\r
-                               display_val = hf_av;\r
-                               display_max = hf_max;\r
-                       } else { /* Pick one at random */\r
-                               if( (hf_max - hf_baseline) > (lf_max - lf_baseline) ) {\r
-                                       display_val = hf_av;\r
-                                       display_max = hf_max;\r
-                               } else {\r
-                                       display_val = lf_av;\r
-                                       display_max = lf_max;\r
-                               }\r
-                       }\r
-                       for (i=0; i<LIGHT_LEN; i++) {\r
-                               if (display_val >= ((display_max/LIGHT_LEN)*i) && display_val <= ((display_max/LIGHT_LEN)*(i+1))) {\r
-                                       if (LIGHT_SCHEME[i] & 0x1) LED_C_ON(); else LED_C_OFF();\r
-                                       if (LIGHT_SCHEME[i] & 0x2) LED_A_ON(); else LED_A_OFF();\r
-                                       if (LIGHT_SCHEME[i] & 0x4) LED_B_ON(); else LED_B_OFF();\r
-                                       if (LIGHT_SCHEME[i] & 0x8) LED_D_ON(); else LED_D_OFF();\r
-                                       break;\r
-                               }\r
-                       }\r
-               }\r
-       }\r
-}\r
-\r
-void UsbPacketReceived(BYTE *packet, int len)\r
-{\r
-       UsbCommand *c = (UsbCommand *)packet;\r
-\r
-       switch(c->cmd) {\r
-#ifdef WITH_LF\r
-               case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K:\r
-                       AcquireRawAdcSamples125k(c->ext1);\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_LF\r
-               case CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K:\r
-                       ModThenAcquireRawAdcSamples125k(c->ext1,c->ext2,c->ext3,c->d.asBytes);\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_ISO15693\r
-               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693:\r
-                       AcquireRawAdcSamplesIso15693();\r
-                       break;\r
-#endif\r
-\r
-               case CMD_BUFF_CLEAR:\r
-                       BufferClear();\r
-                       break;\r
-\r
-#ifdef WITH_ISO15693\r
-               case CMD_READER_ISO_15693:\r
-                       ReaderIso15693(c->ext1);\r
-                       break;\r
-#endif\r
-\r
-               case CMD_READER_LEGIC_RF:\r
-                       LegicRfReader();\r
-                       break;\r
-\r
-#ifdef WITH_ISO15693\r
-               case CMD_SIMTAG_ISO_15693:\r
-                       SimTagIso15693(c->ext1);\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_ISO14443b\r
-               case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443:\r
-                       AcquireRawAdcSamplesIso14443(c->ext1);\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_ISO14443b\r
-               case CMD_READ_SRI512_TAG:\r
-                       ReadSRI512Iso14443(c->ext1);\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_ISO14443a\r
-               case CMD_READER_ISO_14443a:\r
-                       ReaderIso14443a(c->ext1);\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_ISO14443b\r
-               case CMD_SNOOP_ISO_14443:\r
-                       SnoopIso14443();\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_ISO14443a\r
-               case CMD_SNOOP_ISO_14443a:\r
-                       SnoopIso14443a();\r
-                       break;\r
-#endif\r
-\r
-               case CMD_SIMULATE_TAG_HF_LISTEN:\r
-                       SimulateTagHfListen();\r
-                       break;\r
-\r
-#ifdef WITH_ISO14443b\r
-               case CMD_SIMULATE_TAG_ISO_14443:\r
-                       SimulateIso14443Tag();\r
-                       break;\r
-#endif\r
-               \r
-#ifdef WITH_ISO14443a\r
-               case CMD_SIMULATE_TAG_ISO_14443a:\r
-                       SimulateIso14443aTag(c->ext1, c->ext2);  // ## Simulate iso14443a tag - pass tag type & UID\r
-                       break;\r
-#endif\r
-\r
-               case CMD_SIMULATE_TAG_LEGIC_RF:\r
-                       LegicRfSimulate();\r
-                       break;\r
-\r
-               case CMD_MEASURE_ANTENNA_TUNING:\r
-                       MeasureAntennaTuning();\r
-                       break;\r
-\r
-               case CMD_LISTEN_READER_FIELD:\r
-                       ListenReaderField(c->ext1);\r
-                       break;\r
-\r
-#ifdef WITH_LF\r
-               case CMD_HID_DEMOD_FSK:\r
-                       CmdHIDdemodFSK(0, 0, 0, 1);                             // Demodulate HID tag\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_LF\r
-               case CMD_HID_SIM_TAG:\r
-                       CmdHIDsimTAG(c->ext1, c->ext2, 1);                                      // Simulate HID tag by ID\r
-                       break;\r
-#endif\r
-\r
-               case CMD_FPGA_MAJOR_MODE_OFF:           // ## FPGA Control\r
-                       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
-                       SpinDelay(200);\r
-                       LED_D_OFF(); // LED D indicates field ON or OFF\r
-                       break;\r
-\r
-#ifdef WITH_LF\r
-               case CMD_READ_TI_TYPE:\r
-                       ReadTItag();\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_LF\r
-               case CMD_WRITE_TI_TYPE:\r
-                       WriteTItag(c->ext1,c->ext2,c->ext3);\r
-                       break;\r
-#endif\r
-\r
-               case CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K: {\r
-                       UsbCommand n;\r
-                       if(c->cmd == CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K) {\r
-                               n.cmd = CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K;\r
-                       } else {\r
-                               n.cmd = CMD_DOWNLOADED_RAW_BITS_TI_TYPE;\r
-                       }\r
-                       n.ext1 = c->ext1;\r
-                       memcpy(n.d.asDwords, BigBuf+c->ext1, 12*sizeof(DWORD));\r
-                       UsbSendPacket((BYTE *)&n, sizeof(n));\r
-                       break;\r
-               }\r
-\r
-               case CMD_DOWNLOADED_SIM_SAMPLES_125K: {\r
-                       BYTE *b = (BYTE *)BigBuf;\r
-                       memcpy(b+c->ext1, c->d.asBytes, 48);\r
-                       break;\r
-               }\r
-\r
-#ifdef WITH_LF\r
-               case CMD_SIMULATE_TAG_125K:\r
-                       LED_A_ON();\r
-                       SimulateTagLowFrequency(c->ext1, 1);\r
-                       LED_A_OFF();\r
-                       break;\r
-#endif\r
-\r
-               case CMD_READ_MEM:\r
-                       ReadMem(c->ext1);\r
-                       break;\r
-\r
-               case CMD_SET_LF_DIVISOR:\r
-                       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, c->ext1);\r
-                       break;\r
-\r
-               case CMD_SET_ADC_MUX:\r
-                       switch(c->ext1) {\r
-                               case 0: SetAdcMuxFor(GPIO_MUXSEL_LOPKD); break;\r
-                               case 1: SetAdcMuxFor(GPIO_MUXSEL_LORAW); break;\r
-                               case 2: SetAdcMuxFor(GPIO_MUXSEL_HIPKD); break;\r
-                               case 3: SetAdcMuxFor(GPIO_MUXSEL_HIRAW); break;\r
-                       }\r
-                       break;\r
-\r
-               case CMD_VERSION:\r
-                       SendVersion();\r
-                       break;\r
-\r
-#ifdef WITH_LF\r
-               case CMD_LF_SIMULATE_BIDIR:\r
-                       SimulateTagLowFrequencyBidir(c->ext1, c->ext2);\r
-                       break;\r
-#endif\r
-\r
-#ifdef WITH_LCD\r
-               case CMD_LCD_RESET:\r
-                       LCDReset();\r
-                       break;\r
-               case CMD_LCD:\r
-                       LCDSend(c->ext1);\r
-                       break;\r
-#endif\r
-               case CMD_SETUP_WRITE:\r
-               case CMD_FINISH_WRITE:\r
-               case CMD_HARDWARE_RESET:\r
-                       USB_D_PLUS_PULLUP_OFF();\r
-                       SpinDelay(1000);\r
-                       SpinDelay(1000);\r
-                       AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;\r
-                       for(;;) {\r
-                               // We're going to reset, and the bootrom will take control.\r
-                       }\r
-                       break;\r
-\r
-               case CMD_START_FLASH:\r
-                       if(common_area.flags.bootrom_present) {\r
-                               common_area.command = COMMON_AREA_COMMAND_ENTER_FLASH_MODE;\r
-                       }\r
-                       USB_D_PLUS_PULLUP_OFF();\r
-                       AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;\r
-                       for(;;);\r
-                       break;\r
-                       \r
-               case CMD_DEVICE_INFO: {\r
-                       UsbCommand c;\r
-                       c.cmd = CMD_DEVICE_INFO;\r
-                       c.ext1 = DEVICE_INFO_FLAG_OSIMAGE_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_OS;\r
-                       if(common_area.flags.bootrom_present) c.ext1 |= DEVICE_INFO_FLAG_BOOTROM_PRESENT;\r
-                       UsbSendPacket((BYTE*)&c, sizeof(c));\r
-               }\r
-                       break;\r
-               default:\r
-                       DbpString("unknown command");\r
-                       break;\r
-       }\r
-}\r
-\r
-void  __attribute__((noreturn)) AppMain(void)\r
-{\r
-       SpinDelay(100);\r
-       \r
-       if(common_area.magic != COMMON_AREA_MAGIC || common_area.version != 1) {\r
-               /* Initialize common area */\r
-               memset(&common_area, 0, sizeof(common_area));\r
-               common_area.magic = COMMON_AREA_MAGIC;\r
-               common_area.version = 1;\r
-       }\r
-       common_area.flags.osimage_present = 1;\r
-\r
-       LED_D_OFF();\r
-       LED_C_OFF();\r
-       LED_B_OFF();\r
-       LED_A_OFF();\r
-\r
-       UsbStart();\r
-\r
-       // The FPGA gets its clock from us from PCK0 output, so set that up.\r
-       AT91C_BASE_PIOA->PIO_BSR = GPIO_PCK0;\r
-       AT91C_BASE_PIOA->PIO_PDR = GPIO_PCK0;\r
-       AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_PCK0;\r
-       // PCK0 is PLL clock / 4 = 96Mhz / 4 = 24Mhz\r
-       AT91C_BASE_PMC->PMC_PCKR[0] = AT91C_PMC_CSS_PLL_CLK |\r
-               AT91C_PMC_PRES_CLK_4;\r
-       AT91C_BASE_PIOA->PIO_OER = GPIO_PCK0;\r
-\r
-       // Reset SPI\r
-       AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;\r
-       // Reset SSC\r
-       AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;\r
-\r
-       // Load the FPGA image, which we have stored in our flash.\r
-       FpgaDownloadAndGo();\r
-\r
-#ifdef WITH_LCD\r
-\r
-       LCDInit();\r
-\r
-       // test text on different colored backgrounds\r
-       LCDString(" The quick brown fox  ",     (char *)&FONT6x8,1,1+8*0,WHITE  ,BLACK );\r
-       LCDString("  jumped over the     ",     (char *)&FONT6x8,1,1+8*1,BLACK  ,WHITE );\r
-       LCDString("     lazy dog.        ",     (char *)&FONT6x8,1,1+8*2,YELLOW ,RED   );\r
-       LCDString(" AaBbCcDdEeFfGgHhIiJj ",     (char *)&FONT6x8,1,1+8*3,RED    ,GREEN );\r
-       LCDString(" KkLlMmNnOoPpQqRrSsTt ",     (char *)&FONT6x8,1,1+8*4,MAGENTA,BLUE  );\r
-       LCDString("UuVvWwXxYyZz0123456789",     (char *)&FONT6x8,1,1+8*5,BLUE   ,YELLOW);\r
-       LCDString("`-=[]_;',./~!@#$%^&*()",     (char *)&FONT6x8,1,1+8*6,BLACK  ,CYAN  );\r
-       LCDString("     _+{}|:\\\"<>?     ",(char *)&FONT6x8,1,1+8*7,BLUE  ,MAGENTA);\r
-\r
-       // color bands\r
-       LCDFill(0, 1+8* 8, 132, 8, BLACK);\r
-       LCDFill(0, 1+8* 9, 132, 8, WHITE);\r
-       LCDFill(0, 1+8*10, 132, 8, RED);\r
-       LCDFill(0, 1+8*11, 132, 8, GREEN);\r
-       LCDFill(0, 1+8*12, 132, 8, BLUE);\r
-       LCDFill(0, 1+8*13, 132, 8, YELLOW);\r
-       LCDFill(0, 1+8*14, 132, 8, CYAN);\r
-       LCDFill(0, 1+8*15, 132, 8, MAGENTA);\r
-\r
-#endif\r
-\r
-       for(;;) {\r
-               UsbPoll(FALSE);\r
-               WDT_HIT();\r
-\r
-#ifdef WITH_LF\r
-               if (BUTTON_HELD(1000) > 0)\r
-                       SamyRun();\r
-#endif\r
-       }\r
-}\r
+//-----------------------------------------------------------------------------
+// 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 "apps.h"
+#include "util.h"
+#include "printf.h"
+#include "string.h"
+
+#include <stdarg.h>
+
+#include "legicrf.h"
+#include <hitag2.h>
+
+#ifdef WITH_LCD
+ #include "LCD.h"
+#endif
+
+#define abs(x) ( ((x)<0) ? -(x) : (x) )
+
+//=============================================================================
+// A buffer where we can queue things up to be sent through the FPGA, for
+// any purpose (fake tag, as reader, whatever). We go MSB first, since that
+// is the order in which they go out on the wire.
+//=============================================================================
+
+#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;
+struct common_area common_area __attribute__((section(".commonarea")));
+
+void BufferClear(void)
+{
+       memset(BigBuf,0,sizeof(BigBuf));
+       Dbprintf("Buffer cleared (%i bytes)",sizeof(BigBuf));
+}
+
+void ToSendReset(void)
+{
+       ToSendMax = -1;
+       ToSendBit = 8;
+}
+
+void ToSendStuffBit(int b)
+{
+       if(ToSendBit >= 8) {
+               ToSendMax++;
+               ToSend[ToSendMax] = 0;
+               ToSendBit = 0;
+       }
+
+       if(b) {
+               ToSend[ToSendMax] |= (1 << (7 - ToSendBit));
+       }
+
+       ToSendBit++;
+
+       if(ToSendMax >= sizeof(ToSend)) {
+               ToSendBit = 0;
+               DbpString("ToSendStuffBit overflowed!");
+       }
+}
+
+//=============================================================================
+// Debug print functions, to go out over USB, to the usual PC-side client.
+//=============================================================================
+
+void DbpString(char *str)
+{
+  byte_t len = strlen(str);
+  cmd_send(CMD_DEBUG_PRINT_STRING,len,0,0,(byte_t*)str,len);
+//     /* this holds up stuff unless we're connected to usb */
+//     if (!UsbConnected())
+//             return;
+//
+//     UsbCommand c;
+//     c.cmd = CMD_DEBUG_PRINT_STRING;
+//     c.arg[0] = strlen(str);
+//     if(c.arg[0] > sizeof(c.d.asBytes)) {
+//             c.arg[0] = sizeof(c.d.asBytes);
+//     }
+//     memcpy(c.d.asBytes, str, c.arg[0]);
+//
+//     UsbSendPacket((uint8_t *)&c, sizeof(c));
+//     // TODO fix USB so stupid things like this aren't req'd
+//     SpinDelay(50);
+}
+
+#if 0
+void DbpIntegers(int x1, int x2, int x3)
+{
+  cmd_send(CMD_DEBUG_PRINT_INTEGERS,x1,x2,x3,0,0);
+//     /* this holds up stuff unless we're connected to usb */
+//     if (!UsbConnected())
+//             return;
+//
+//     UsbCommand c;
+//     c.cmd = CMD_DEBUG_PRINT_INTEGERS;
+//     c.arg[0] = x1;
+//     c.arg[1] = x2;
+//     c.arg[2] = x3;
+//
+//     UsbSendPacket((uint8_t *)&c, sizeof(c));
+//     // XXX
+//     SpinDelay(50);
+}
+#endif
+
+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;
+
+       va_start(ap, fmt);
+       kvsprintf(fmt, output_string, 10, ap);
+       va_end(ap);
+
+       DbpString(output_string);
+}
+
+// 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 {
+                       Dbprintf("%*D",l,d," ");
+               }
+        
+               len-=8;
+               d+=8;           
+       }
+}
+
+//-----------------------------------------------------------------------------
+// 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
+// return that.
+//-----------------------------------------------------------------------------
+static int ReadAdc(int ch)
+{
+       uint32_t d;
+
+       AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST;
+       AT91C_BASE_ADC->ADC_MR =
+               ADC_MODE_PRESCALE(32) |
+               ADC_MODE_STARTUP_TIME(16) |
+               ADC_MODE_SAMPLE_HOLD_TIME(8);
+       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 = AT91C_BASE_ADC->ADC_CDR[ch];
+
+       return d;
+}
+
+int AvgAdc(int ch) // was static - merlok
+{
+       int i;
+       int a = 0;
+
+       for(i = 0; i < 32; i++) {
+               a += ReadAdc(ch);
+       }
+
+       return (a + 15) >> 5;
+}
+
+void MeasureAntennaTuning(void)
+{
+       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
+
+       LED_B_ON();
+
+/*
+ * Sweeps the useful LF range of the proxmark from
+ * 46.8kHz (divisor=255) to 600kHz (divisor=19) and
+ * read the voltage in the antenna, the result left
+ * in the buffer is a graph which should clearly show
+ * the resonating frequency of your LF antenna
+ * ( hopefully around 95 if it is tuned to 125kHz!)
+ */
+  
+       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);
+               // 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);
+               if (i==95)      vLf125 = adcval; // voltage at 125Khz
+               if (i==89)      vLf134 = adcval; // voltage at 134Khz
+
+               LF_Results[i] = adcval>>8; // scale int to fit in byte for graphing purposes
+               if(LF_Results[i] > peak) {
+                       peakv = adcval;
+                       peak = LF_Results[i];
+                       peakf = 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.
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+       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;
+
+       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 MeasureAntennaTuningHf(void)
+{
+       int vHf = 0;    // in mV
+
+       DbpString("Measuring HF antenna, press button to exit");
+
+       for (;;) {
+               // 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);
+               // 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;
+
+               Dbprintf("%d mV",vHf);
+               if (BUTTON_PRESS()) break;
+       }
+       DbpString("cancelled");
+}
+
+
+void SimulateTagHfListen(void)
+{
+       uint8_t *dest = (uint8_t *)BigBuf+FREE_BUFFER_OFFSET;
+       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.
+       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.
+       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+
+       FpgaSetupSsc();
+
+       i = 0;
+       for(;;) {
+               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+                       AT91C_BASE_SSC->SSC_THR = 0xff;
+               }
+               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;
+                       }
+                       p++;
+
+                       if(p >= 8) {
+                               dest[i] = v;
+                               v = 0;
+                               p = 0;
+                               i++;
+
+                               if(i >= FREE_BUFFER_SIZE) {
+                                       break;
+                               }
+                       }
+               }
+       }
+       DbpString("simulate tag (now type bitsamples)");
+}
+
+void ReadMem(int addr)
+{
+       const uint8_t *data = ((uint8_t *)addr);
+
+       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]);
+}
+
+/* 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[256]; /* 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);
+       }
+
+       FormatVersionInformation(temp, sizeof(temp), "os: ", &version_information);
+       DbpString(temp);
+
+       FpgaGatherVersion(temp, sizeof(temp));
+       DbpString(temp);
+       // Send Chip ID
+       cmd_send(CMD_ACK,*(AT91C_DBGU_CIDR),0,0,NULL,0);
+}
+
+#ifdef WITH_LF
+// samy's sniff and repeat routine
+void SamyRun()
+{
+       DbpString("Stand-alone mode! No PC necessary.");
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+
+       // 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 (;;)
+       {
+//             UsbPoll(FALSE);
+               usb_poll();
+    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);
+                       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;
+               }
+
+               // 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_count= 0, lf_max;
+       int hf_av, hf_av_new,  hf_baseline= 0, hf_count= 0, hf_max;
+       int mode=1, display_val, display_max, i;
+
+#define LF_ONLY                1
+#define HF_ONLY                2
+
+       LEDsoff();
+
+       lf_av=lf_max=ReadAdc(ADC_CHAN_LF);
+
+       if(limit != HF_ONLY) {
+               Dbprintf("LF 125/134 Baseline: %d", lf_av);
+               lf_baseline = lf_av;
+       }
+
+       hf_av=hf_max=ReadAdc(ADC_CHAN_HF);
+
+       if (limit != LF_ONLY) {
+               Dbprintf("HF 13.56 Baseline: %d", hf_av);
+               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) > 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) {
+                               Dbprintf("LF 125/134 Field Change: %x %x %x", lf_av, lf_av_new, lf_count);
+                               lf_av = lf_av_new;
+                               if (lf_av > lf_max)
+                                       lf_max = lf_av;
+                               lf_count= 0;
+                       }
+               }
+
+               if (limit != LF_ONLY) {
+                       if (mode == 1){
+                               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) {
+                               Dbprintf("HF 13.56 Field Change: %x %x %x", hf_av, hf_av_new, hf_count);
+                               hf_av = hf_av_new;
+                               if (hf_av > hf_max)
+                                       hf_max = hf_av;
+                               hf_count= 0;
+                       }
+               }
+
+               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_ACQUIRE_RAW_ADC_SAMPLES_125K:
+                       AcquireRawAdcSamples125k(c->arg[0]);
+                       cmd_send(CMD_ACK,0,0,0,0,0);
+                       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:
+                       SnoopLFRawAdcSamples(c->arg[0], c->arg[1]);
+                       cmd_send(CMD_ACK,0,0,0,0,0);
+                       break;
+               case CMD_HID_DEMOD_FSK:
+                       CmdHIDdemodFSK(c->arg[0], 0, 0, 1);                                     // Demodulate HID tag
+                       break;
+               case CMD_HID_SIM_TAG:
+                       CmdHIDsimTAG(c->arg[0], c->arg[1], 1);                                  // Simulate HID tag by ID
+                       break;
+               case CMD_HID_CLONE_TAG: // Clone HID tag by ID to T55x7
+                       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);                                      // Demodulate IO tag
+                       break;
+               case CMD_IO_CLONE_TAG: // Clone IO tag by ID to T55x7
+                       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:                                      // Clone Indala 64-bit tag by UID to T55x7
+                       CopyIndala64toT55x7(c->arg[0], c->arg[1]);                                      
+                       break;
+               case CMD_INDALA_CLONE_TAG_L:                                    // Clone Indala 224-bit tag by UID to T55x7
+                       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: // Clone HID tag by ID to T55x7
+                       T55xxReadTrace();
+                       break;
+               case CMD_PCF7931_READ: // Read PCF7931 tag
+                       ReadPCF7931();
+                       cmd_send(CMD_ACK,0,0,0,0,0);
+//             UsbSendPacket((uint8_t*)&ack, sizeof(ack));
+                       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]);
+                       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_MIFAREU_READCARD:
+                       MifareUReadCard(c->arg[0],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_EML_CSETBLOCK:
+                       MifareCSetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_MIFARE_EML_CGETBLOCK:
+                       MifareCGetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       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;
+#endif
+
+               case CMD_SIMULATE_TAG_HF_LISTEN:
+                       SimulateTagHfListen();
+                       break;
+
+               case CMD_BUFF_CLEAR:
+                       BufferClear();
+                       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
+                       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+                       SpinDelay(200);
+                       LED_D_OFF(); // LED D indicates field ON or OFF
+                       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;
+//                     } else {
+//                             n.cmd = CMD_DOWNLOADED_RAW_BITS_TI_TYPE;
+//                     }
+//                     n.arg[0] = c->arg[0];
+      //                       memcpy(n.d.asBytes, BigBuf+c->arg[0], 48); // 12*sizeof(uint32_t)
+      //                       LED_B_ON();
+      //      usb_write((uint8_t *)&n, sizeof(n));
+      //                       UsbSendPacket((uint8_t *)&n, sizeof(n));
+      //                       LED_B_OFF();
+
+                       LED_B_ON();
+                       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,0,((byte_t*)BigBuf)+c->arg[0]+i,len);
+                       }
+                       // Trigger a finish downloading signal with an ACK frame
+                       cmd_send(CMD_ACK,0,0,0,0,0);
+                       LED_B_OFF();
+                       break;
+
+               case CMD_DOWNLOADED_SIM_SAMPLES_125K: {
+                       uint8_t *b = (uint8_t *)BigBuf;
+                       memcpy(b+c->arg[0], c->d.asBytes, 48);
+                       //Dbprintf("copied 48 bytes to %i",b+c->arg[0]);
+//                     UsbSendPacket((uint8_t*)&ack, sizeof(ack));
+                       cmd_send(CMD_ACK,0,0,0,0,0);
+                       break;
+               }       
+               case CMD_READ_MEM:
+                       ReadMem(c->arg[0]);
+                       break;
+
+               case CMD_SET_LF_DIVISOR:
+                       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;
+
+#ifdef WITH_LCD
+               case CMD_LCD_RESET:
+                       LCDReset();
+                       break;
+               case CMD_LCD:
+                       LCDSend(c->arg[0]);
+                       break;
+#endif
+               case CMD_SETUP_WRITE:
+               case CMD_FINISH_WRITE:
+               case CMD_HARDWARE_RESET:
+                       usb_disable();
+                       SpinDelay(1000);
+                       SpinDelay(1000);
+                       AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;
+                       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;
+//                     UsbSendPacket((uint8_t*)&c, sizeof(c));
+                       cmd_send(CMD_DEVICE_INFO,dev_info,0,0,0,0);     
+                       break;
+               }
+               default:
+                       Dbprintf("%s: 0x%04x","unknown command:",c->cmd);
+                       break;
+       }
+}
+
+void  __attribute__((noreturn)) AppMain(void)
+{
+       SpinDelay(100);
+
+       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();
+
+  // Init USB device`
+  usb_enable();
+//     UsbStart();
+
+       // The FPGA gets its clock from us from PCK0 output, so set that up.
+       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
+       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
+       AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;
+       // Reset SSC
+       AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;
+
+       // Load the FPGA image, which we have stored in our flash.
+       // (the HF version by default)
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+
+       StartTickCount();
+       
+#ifdef WITH_LCD
+       LCDInit();
+#endif
+
+  byte_t rx[sizeof(UsbCommand)];
+       size_t rx_len;
+  
+       for(;;) {
+    if (usb_poll()) {
+      rx_len = usb_read(rx,sizeof(UsbCommand));
+      if (rx_len) {
+        UsbPacketReceived(rx,rx_len);
+      }
+    }
+//             UsbPoll(FALSE);
+
+               WDT_HIT();
+
+#ifdef WITH_LF
+               if (BUTTON_HELD(1000) > 0)
+                       SamyRun();
+#endif
+       }
+}
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