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MFU dump UL-C with key
[proxmark3-svn] / armsrc / appmain.c
diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index 1f005716afa2684e6b60c3727f3d3f4f77cbc5de..128f4063b14b5ab6e7a688b0e3497f16a8355ea3 100644 (file)
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -10,6 +10,9 @@
 // executes.
 //-----------------------------------------------------------------------------
 
 // executes.
 //-----------------------------------------------------------------------------
 
+#include "usb_cdc.h"
+#include "cmd.h"
+
 #include "proxmark3.h"
 #include "apps.h"
 #include "util.h"
 #include "proxmark3.h"
 #include "apps.h"
 #include "util.h"
@@ -20,10 +23,10 @@
 
 #include "legicrf.h"
 #include <hitag2.h>
 
 #include "legicrf.h"
 #include <hitag2.h>
-
+#include "lfsampling.h"
+#include "BigBuf.h"
 #ifdef WITH_LCD
 #ifdef WITH_LCD
-# include "fonts.h"
-# include "LCD.h"
+ #include "LCD.h"
 #endif
 
 #define abs(x) ( ((x)<0) ? -(x) : (x) )
 #endif
 
 #define abs(x) ( ((x)<0) ? -(x) : (x) )
@@ -34,17 +37,12 @@
 // is the order in which they go out on the wire.
 //=============================================================================
 
 // is the order in which they go out on the wire.
 //=============================================================================
 
-uint8_t ToSend[512];
+#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")));
 
 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;
 void ToSendReset(void)
 {
        ToSendMax = -1;
@@ -65,7 +63,7 @@ void ToSendStuffBit(int b)
 
        ToSendBit++;
 
 
        ToSendBit++;
 
-       if(ToSendBit >= sizeof(ToSend)) {
+       if(ToSendMax >= sizeof(ToSend)) {
                ToSendBit = 0;
                DbpString("ToSendStuffBit overflowed!");
        }
                ToSendBit = 0;
                DbpString("ToSendStuffBit overflowed!");
        }
@@ -77,39 +75,14 @@ void ToSendStuffBit(int b)
 
 void DbpString(char *str)
 {
 
 void DbpString(char *str)
 {
-       /* 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);
+  byte_t len = strlen(str);
+  cmd_send(CMD_DEBUG_PRINT_STRING,len,0,0,(byte_t*)str,len);
 }
 
 #if 0
 void DbpIntegers(int x1, int x2, int x3)
 {
 }
 
 #if 0
 void DbpIntegers(int x1, int x2, int x3)
 {
-       /* 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);
+  cmd_send(CMD_DEBUG_PRINT_INTEGERS,x1,x2,x3,0,0);
 }
 #endif
 
 }
 #endif
 
@@ -163,12 +136,25 @@ static int ReadAdc(int ch)
 
        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST;
        AT91C_BASE_ADC->ADC_MR =
 
        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);
+               ADC_MODE_PRESCALE(63  /* was 32 */) |                                                   // ADC_CLK = MCK / ((63+1) * 2) = 48MHz / 128 = 375kHz
+               ADC_MODE_STARTUP_TIME(1  /* was 16 */) |                                                // Startup Time = (1+1) * 8 / ADC_CLK = 16 / 375kHz = 42,7us     Note: must be > 20us
+               ADC_MODE_SAMPLE_HOLD_TIME(15  /* was 8 */);                                     // Sample & Hold Time SHTIM = 15 / ADC_CLK = 15 / 375kHz = 40us
+
+       // Note: ADC_MODE_PRESCALE and ADC_MODE_SAMPLE_HOLD_TIME are set to the maximum allowed value. 
+       // Both AMPL_LO and AMPL_HI are very high impedance (10MOhm) outputs, the input capacitance of the ADC is 12pF (typical). This results in a time constant
+       // of RC = 10MOhm * 12pF = 120us. Even after the maximum configurable sample&hold time of 40us the input capacitor will not be fully charged. 
+       // 
+       // The maths are:
+       // If there is a voltage v_in at the input, the voltage v_cap at the capacitor (this is what we are measuring) will be
+       //
+       //       v_cap = v_in * (1 - exp(-RC/SHTIM))  =   v_in * (1 - exp(-3))  =  v_in * 0,95                   (i.e. an error of 5%)
+       // 
+       // Note: with the "historic" values in the comments above, the error was 34%  !!!
+       
        AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ch);
 
        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;
        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];
        while(!(AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ch)))
                ;
        d = AT91C_BASE_ADC->ADC_CDR[ch];
@@ -190,15 +176,11 @@ int AvgAdc(int ch) // was static - merlok
 
 void MeasureAntennaTuning(void)
 {
 
 void MeasureAntennaTuning(void)
 {
-       uint8_t *dest = (uint8_t *)BigBuf+FREE_BUFFER_OFFSET;
+       uint8_t LF_Results[256];
        int i, adcval = 0, peak = 0, peakv = 0, peakf = 0; //ptr = 0 
        int vLf125 = 0, vLf134 = 0, vHf = 0;    // in mV
 
        int i, adcval = 0, peak = 0, peakv = 0, peakf = 0; //ptr = 0 
        int vLf125 = 0, vLf134 = 0, vHf = 0;    // in mV
 
-       UsbCommand c;
-
-  LED_B_ON();
-       DbpString("Measuring antenna characteristics, please wait...");
-       memset(dest,0,sizeof(FREE_BUFFER_SIZE));
+       LED_B_ON();
 
 /*
  * Sweeps the useful LF range of the proxmark from
 
 /*
  * Sweeps the useful LF range of the proxmark from
@@ -209,46 +191,39 @@ void MeasureAntennaTuning(void)
  * ( hopefully around 95 if it is tuned to 125kHz!)
  */
   
  * ( hopefully around 95 if it is tuned to 125kHz!)
  */
   
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
-       for (i=255; i>19; i--) {
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+       for (i=255; i>=19; i--) {
     WDT_HIT();
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, i);
                SpinDelay(20);
     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);
+               adcval = ((MAX_ADC_LF_VOLTAGE * AvgAdc(ADC_CHAN_LF)) >> 10);
                if (i==95)      vLf125 = adcval; // voltage at 125Khz
                if (i==89)      vLf134 = adcval; // voltage at 134Khz
 
                if (i==95)      vLf125 = adcval; // voltage at 125Khz
                if (i==89)      vLf134 = adcval; // voltage at 134Khz
 
-               dest[i] = adcval>>8; // scale int to fit in byte for graphing purposes
-               if(dest[i] > peak) {
+               LF_Results[i] = adcval>>8; // scale int to fit in byte for graphing purposes
+               if(LF_Results[i] > peak) {
                        peakv = adcval;
                        peakv = adcval;
-                       peak = dest[i];
+                       peak = LF_Results[i];
                        peakf = i;
                        //ptr = i;
                }
        }
 
                        peakf = i;
                        //ptr = i;
                }
        }
 
-  LED_A_ON();
+       for (i=18; i >= 0; i--) LF_Results[i] = 0;
+       
+       LED_A_ON();
        // Let the FPGA drive the high-frequency antenna around 13.56 MHz.
        // Let the FPGA drive the high-frequency antenna around 13.56 MHz.
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
        SpinDelay(20);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
        SpinDelay(20);
-       // Vref = 3300mV, and an 10:1 voltage divider on the input
-       // can measure voltages up to 33000 mV
-       vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10;
+       vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10;
 
 
-       c.cmd = CMD_MEASURED_ANTENNA_TUNING;
-       c.arg[0] = (vLf125 << 0) | (vLf134 << 16);
-       c.arg[1] = vHf;
-       c.arg[2] = peakf | (peakv << 16);
-
-  DbpString("Measuring complete, sending report back to host");
-
-       UsbSendPacket((uint8_t *)&c, sizeof(c));
+       cmd_send(CMD_MEASURED_ANTENNA_TUNING, vLf125 | (vLf134<<16), vHf, peakf | (peakv<<16), LF_Results, 256);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-  LED_A_OFF();
-  LED_B_OFF();
-  return;
+       LED_A_OFF();
+       LED_B_OFF();
+       return;
 }
 
 void MeasureAntennaTuningHf(void)
 }
 
 void MeasureAntennaTuningHf(void)
@@ -257,30 +232,37 @@ void MeasureAntennaTuningHf(void)
 
        DbpString("Measuring HF antenna, press button to exit");
 
 
        DbpString("Measuring HF antenna, press button to exit");
 
+       // Let the FPGA drive the high-frequency antenna around 13.56 MHz.
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
+
        for (;;) {
        for (;;) {
-               // Let the FPGA drive the high-frequency antenna around 13.56 MHz.
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
                SpinDelay(20);
                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;
+               vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10;
 
                Dbprintf("%d mV",vHf);
                if (BUTTON_PRESS()) break;
        }
        DbpString("cancelled");
 
                Dbprintf("%d mV",vHf);
                if (BUTTON_PRESS()) break;
        }
        DbpString("cancelled");
+
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
 }
 
 
 void SimulateTagHfListen(void)
 {
 }
 
 
 void SimulateTagHfListen(void)
 {
-       uint8_t *dest = (uint8_t *)BigBuf+FREE_BUFFER_OFFSET;
+       // ToDo: historically this used the free buffer, which was 2744 Bytes long. 
+       // There might be a better size to be defined:
+       #define HF_14B_SNOOP_BUFFER_SIZE 2744
+       uint8_t *dest = BigBuf_malloc(HF_14B_SNOOP_BUFFER_SIZE);
        uint8_t v = 0;
        int i;
        int p = 0;
 
        // We're using this mode just so that I can test it out; the simulated
        // tag mode would work just as well and be simpler.
        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.
        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.
@@ -308,7 +290,7 @@ void SimulateTagHfListen(void)
                                p = 0;
                                i++;
 
                                p = 0;
                                i++;
 
-                               if(i >= FREE_BUFFER_SIZE) {
+                               if(i >= HF_14B_SNOOP_BUFFER_SIZE) {
                                        break;
                                }
                        }
                                        break;
                                }
                        }
@@ -331,7 +313,7 @@ extern struct version_information version_information;
 extern char *_bootphase1_version_pointer, _flash_start, _flash_end;
 void SendVersion(void)
 {
 extern char *_bootphase1_version_pointer, _flash_start, _flash_end;
 void SendVersion(void)
 {
-       char temp[48]; /* Limited data payload in USB packets */
+       char temp[512]; /* Limited data payload in USB packets */
        DbpString("Prox/RFID mark3 RFID instrument");
 
        /* Try to find the bootrom version information. Expect to find a pointer at
        DbpString("Prox/RFID mark3 RFID instrument");
 
        /* Try to find the bootrom version information. Expect to find a pointer at
@@ -351,6 +333,8 @@ void SendVersion(void)
 
        FpgaGatherVersion(temp, sizeof(temp));
        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
 }
 
 #ifdef WITH_LF
@@ -358,6 +342,7 @@ void SendVersion(void)
 void SamyRun()
 {
        DbpString("Stand-alone mode! No PC necessary.");
 void SamyRun()
 {
        DbpString("Stand-alone mode! No PC necessary.");
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
 
        // 3 possible options? no just 2 for now
 #define OPTS 2
 
        // 3 possible options? no just 2 for now
 #define OPTS 2
@@ -377,21 +362,22 @@ void SamyRun()
 
        int selected = 0;
        int playing = 0;
 
        int selected = 0;
        int playing = 0;
+       int cardRead = 0;
 
        // Turn on selected LED
        LED(selected + 1, 0);
 
        for (;;)
        {
 
        // Turn on selected LED
        LED(selected + 1, 0);
 
        for (;;)
        {
-               UsbPoll(FALSE);
-               WDT_HIT();
+               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
 
                // 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)
+               if (button_pressed > 0 && cardRead == 0)
                {
                        LEDsoff();
                        LED(selected + 1, 0);
                {
                        LEDsoff();
                        LED(selected + 1, 0);
@@ -417,6 +403,40 @@ void SamyRun()
                        // If we were previously playing, set playing off
                        // so next button push begins playing what we recorded
                        playing = 0;
                        // If we were previously playing, set playing off
                        // so next button push begins playing what we recorded
                        playing = 0;
+                       
+                       cardRead = 1;
+       
+               }
+
+               else if (button_pressed > 0 && cardRead == 1)
+               {
+                                       LEDsoff();
+                                       LED(selected + 1, 0);
+                                       LED(LED_ORANGE, 0);
+
+                                       // record
+                                       Dbprintf("Cloning %x %x %x", selected, high[selected], low[selected]);
+
+                                       // wait for button to be released
+                                       while(BUTTON_PRESS())
+                                               WDT_HIT();
+
+                                       /* need this delay to prevent catching some weird data */
+                                       SpinDelay(500);
+
+                                       CopyHIDtoT55x7(high[selected], low[selected], 0, 0);
+                                       Dbprintf("Cloned %x %x %x", selected, high[selected], low[selected]);
+
+                                       LEDsoff();
+                                       LED(selected + 1, 0);
+                                       // Finished recording
+
+                                       // If we were previously playing, set playing off
+                                       // so next button push begins playing what we recorded
+                                       playing = 0;
+                                       
+                                       cardRead = 0;
+                       
                }
 
                // Change where to record (or begin playing)
                }
 
                // Change where to record (or begin playing)
@@ -504,26 +524,32 @@ static const int LIGHT_LEN = sizeof(LIGHT_SCHEME)/sizeof(LIGHT_SCHEME[0]);
 
 void ListenReaderField(int limit)
 {
 
 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 lf_av, lf_av_new, lf_baseline= 0, lf_max;
+       int hf_av, hf_av_new,  hf_baseline= 0, hf_max;
        int mode=1, display_val, display_max, i;
 
        int mode=1, display_val, display_max, i;
 
-#define LF_ONLY                1
-#define HF_ONLY                2
+#define LF_ONLY                                                1
+#define HF_ONLY                                                2
+#define REPORT_CHANGE                          10    // report new values only if they have changed at least by REPORT_CHANGE
+
+
+       // switch off FPGA - we don't want to measure our own signal
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 
        LEDsoff();
 
 
        LEDsoff();
 
-       lf_av=lf_max=ReadAdc(ADC_CHAN_LF);
+       lf_av = lf_max = AvgAdc(ADC_CHAN_LF);
 
        if(limit != HF_ONLY) {
 
        if(limit != HF_ONLY) {
-               Dbprintf("LF 125/134 Baseline: %d", lf_av);
+               Dbprintf("LF 125/134kHz Baseline: %dmV", (MAX_ADC_LF_VOLTAGE * lf_av) >> 10);
                lf_baseline = lf_av;
        }
 
                lf_baseline = lf_av;
        }
 
-       hf_av=hf_max=ReadAdc(ADC_CHAN_HF);
+       hf_av = hf_max = AvgAdc(ADC_CHAN_HF);
 
        if (limit != LF_ONLY) {
 
        if (limit != LF_ONLY) {
-               Dbprintf("HF 13.56 Baseline: %d", hf_av);
+               Dbprintf("HF 13.56MHz Baseline: %dmV", (MAX_ADC_HF_VOLTAGE * hf_av) >> 10);
                hf_baseline = hf_av;
        }
 
                hf_baseline = hf_av;
        }
 
@@ -546,38 +572,38 @@ void ListenReaderField(int limit)
                WDT_HIT();
 
                if (limit != HF_ONLY) {
                WDT_HIT();
 
                if (limit != HF_ONLY) {
-                       if(mode==1) {
-                               if (abs(lf_av - lf_baseline) > 10) LED_D_ON();
-                               else                               LED_D_OFF();
+                       if(mode == 1) {
+                               if (abs(lf_av - lf_baseline) > REPORT_CHANGE) 
+                                       LED_D_ON();
+                               else
+                                       LED_D_OFF();
                        }
 
                        }
 
-                       ++lf_count;
-                       lf_av_new= ReadAdc(ADC_CHAN_LF);
+                       lf_av_new = AvgAdc(ADC_CHAN_LF);
                        // see if there's a significant change
                        // 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);
+                       if(abs(lf_av - lf_av_new) > REPORT_CHANGE) {
+                               Dbprintf("LF 125/134kHz Field Change: %5dmV", (MAX_ADC_LF_VOLTAGE * lf_av_new) >> 10);
                                lf_av = lf_av_new;
                                if (lf_av > lf_max)
                                        lf_max = lf_av;
                                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 (limit != LF_ONLY) {
                        if (mode == 1){
-                               if (abs(hf_av - hf_baseline) > 10) LED_B_ON();
-                               else                               LED_B_OFF();
+                               if (abs(hf_av - hf_baseline) > REPORT_CHANGE)   
+                                       LED_B_ON();
+                               else
+                                       LED_B_OFF();
                        }
 
                        }
 
-                       ++hf_count;
-                       hf_av_new= ReadAdc(ADC_CHAN_HF);
+                       hf_av_new = AvgAdc(ADC_CHAN_HF);
                        // see if there's a significant change
                        // 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);
+                       if(abs(hf_av - hf_av_new) > REPORT_CHANGE) {
+                               Dbprintf("HF 13.56MHz Field Change: %5dmV", (MAX_ADC_HF_VOLTAGE * hf_av_new) >> 10);
                                hf_av = hf_av_new;
                                if (hf_av > hf_max)
                                        hf_max = hf_av;
                                hf_av = hf_av_new;
                                if (hf_av > hf_max)
                                        hf_max = hf_av;
-                               hf_count= 0;
                        }
                }
 
                        }
                }
 
@@ -613,27 +639,50 @@ void ListenReaderField(int limit)
 void UsbPacketReceived(uint8_t *packet, int len)
 {
        UsbCommand *c = (UsbCommand *)packet;
 void UsbPacketReceived(uint8_t *packet, int len)
 {
        UsbCommand *c = (UsbCommand *)packet;
-       UsbCommand ack;
-       ack.cmd = CMD_ACK;
 
 
+//  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
        switch(c->cmd) {
 #ifdef WITH_LF
+               case CMD_SET_LF_SAMPLING_CONFIG:
+                       setSamplingConfig((sample_config *) c->d.asBytes);
+                       break;
                case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K:
                case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K:
-                       AcquireRawAdcSamples125k(c->arg[0]);
-                       UsbSendPacket((uint8_t*)&ack, sizeof(ack));
+                       cmd_send(CMD_ACK,SampleLF(c->arg[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;
                        break;
                case CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K:
                        ModThenAcquireRawAdcSamples125k(c->arg[0],c->arg[1],c->arg[2],c->d.asBytes);
                        break;
+               case CMD_LF_SNOOP_RAW_ADC_SAMPLES:
+                       cmd_send(CMD_ACK,SnoopLF(),0,0,0,0);
+                       break;
                case CMD_HID_DEMOD_FSK:
                case CMD_HID_DEMOD_FSK:
-                       CmdHIDdemodFSK(0, 0, 0, 1);                                     // Demodulate HID tag
+                       CmdHIDdemodFSK(c->arg[0], 0, 0, 1);
                        break;
                case CMD_HID_SIM_TAG:
                        break;
                case CMD_HID_SIM_TAG:
-                       CmdHIDsimTAG(c->arg[0], c->arg[1], 1);                                  // Simulate HID tag by ID
+                       CmdHIDsimTAG(c->arg[0], c->arg[1], 1);
+                       break;
+               case CMD_FSK_SIM_TAG:
+                       CmdFSKsimTAG(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_ASK_SIM_TAG:
+                       CmdASKsimTag(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
                        break;
                        break;
-               case CMD_HID_CLONE_TAG: // Clone HID tag by ID to T55x7
+               case CMD_PSK_SIM_TAG:
+                       CmdPSKsimTag(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+                       break;
+               case CMD_HID_CLONE_TAG:
                        CopyHIDtoT55x7(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes[0]);
                        break;
                        CopyHIDtoT55x7(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes[0]);
                        break;
+               case CMD_IO_DEMOD_FSK:
+                       CmdIOdemodFSK(c->arg[0], 0, 0, 1);
+                       break;
+               case CMD_IO_CLONE_TAG:
+                       CopyIOtoT55x7(c->arg[0], c->arg[1], c->d.asBytes[0]);
+                       break;
+               case CMD_EM410X_DEMOD:
+                       CmdEM410xdemod(c->arg[0], 0, 0, 1);
+                       break;
                case CMD_EM410X_WRITE_TAG:
                        WriteEM410x(c->arg[0], c->arg[1], c->arg[2]);
                        break;
                case CMD_EM410X_WRITE_TAG:
                        WriteEM410x(c->arg[0], c->arg[1], c->arg[2]);
                        break;
@@ -651,21 +700,31 @@ void UsbPacketReceived(uint8_t *packet, int len)
                case CMD_LF_SIMULATE_BIDIR:
                        SimulateTagLowFrequencyBidir(c->arg[0], c->arg[1]);
                        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
+               case CMD_INDALA_CLONE_TAG:
                        CopyIndala64toT55x7(c->arg[0], c->arg[1]);                                      
                        break;
                        CopyIndala64toT55x7(c->arg[0], c->arg[1]);                                      
                        break;
-               case CMD_INDALA_CLONE_TAG_L:                                    // Clone Indala 224-bit tag by UID to T55x7
+               case CMD_INDALA_CLONE_TAG_L:
                        CopyIndala224toT55x7(c->d.asDwords[0], c->d.asDwords[1], c->d.asDwords[2], c->d.asDwords[3], c->d.asDwords[4], c->d.asDwords[5], c->d.asDwords[6]);
                        break;
                        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: 
+               case CMD_T55XX_READ_BLOCK:
                        T55xxReadBlock(c->arg[1], c->arg[2],c->d.asBytes[0]);
                        break;
                        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]); 
+               case CMD_T55XX_WRITE_BLOCK:
+                       T55xxWriteBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes[0]);
                        break;
                        break;
-               case CMD_T55XX_READ_TRACE: // Clone HID tag by ID to T55x7
+               case CMD_T55XX_READ_TRACE:
                        T55xxReadTrace();
                        break;
                        T55xxReadTrace();
                        break;
+               case CMD_PCF7931_READ:
+                       ReadPCF7931();
+                       cmd_send(CMD_ACK,0,0,0,0,0);
+                       break;
+               case CMD_EM4X_READ_WORD:
+                       EM4xReadWord(c->arg[1], c->arg[2],c->d.asBytes[0]);
+                       break;
+               case CMD_EM4X_WRITE_WORD:
+                       EM4xWriteWord(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes[0]);
+                       break;
 #endif
 
 #ifdef WITH_HITAG
 #endif
 
 #ifdef WITH_HITAG
@@ -679,7 +738,7 @@ void UsbPacketReceived(uint8_t *packet, int len)
                        ReaderHitag((hitag_function)c->arg[0],(hitag_data*)c->d.asBytes);
                        break;
 #endif
                        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();
 #ifdef WITH_ISO15693
                case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693:
                        AcquireRawAdcSamplesIso15693();
@@ -704,7 +763,7 @@ void UsbPacketReceived(uint8_t *packet, int len)
                        ReaderIso15693(c->arg[0]);
                        break;
                case CMD_SIMTAG_ISO_15693:
                        ReaderIso15693(c->arg[0]);
                        break;
                case CMD_SIMTAG_ISO_15693:
-                       SimTagIso15693(c->arg[0]);
+                       SimTagIso15693(c->arg[0], c->d.asBytes);
                        break;
 #endif
 
                        break;
 #endif
 
@@ -727,10 +786,10 @@ void UsbPacketReceived(uint8_t *packet, int len)
                        AcquireRawAdcSamplesIso14443(c->arg[0]);
                        break;
                case CMD_READ_SRI512_TAG:
                        AcquireRawAdcSamplesIso14443(c->arg[0]);
                        break;
                case CMD_READ_SRI512_TAG:
-                       ReadSRI512Iso14443(c->arg[0]);
+                       ReadSTMemoryIso14443(0x0F);
                        break;
                case CMD_READ_SRIX4K_TAG:
                        break;
                case CMD_READ_SRIX4K_TAG:
-                       ReadSRIX4KIso14443(c->arg[0]);
+                       ReadSTMemoryIso14443(0x7F);
                        break;
                case CMD_SNOOP_ISO_14443:
                        SnoopIso14443();
                        break;
                case CMD_SNOOP_ISO_14443:
                        SnoopIso14443();
@@ -738,6 +797,9 @@ void UsbPacketReceived(uint8_t *packet, int len)
                case CMD_SIMULATE_TAG_ISO_14443:
                        SimulateIso14443Tag();
                        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
 #endif
 
 #ifdef WITH_ISO14443a
@@ -745,13 +807,14 @@ void UsbPacketReceived(uint8_t *packet, int len)
                        SnoopIso14443a(c->arg[0]);
                        break;
                case CMD_READER_ISO_14443a:
                        SnoopIso14443a(c->arg[0]);
                        break;
                case CMD_READER_ISO_14443a:
-                       ReaderIso14443a(c, &ack);
+                       ReaderIso14443a(c);
                        break;
                case CMD_SIMULATE_TAG_ISO_14443a:
                        break;
                case CMD_SIMULATE_TAG_ISO_14443a:
-                       SimulateIso14443aTag(c->arg[0], c->arg[1], c->arg[2]);  // ## Simulate iso14443a tag - pass tag type & UID
+                       SimulateIso14443aTag(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);  // ## Simulate iso14443a tag - pass tag type & UID
                        break;
                        break;
+                       
                case CMD_EPA_PACE_COLLECT_NONCE:
                case CMD_EPA_PACE_COLLECT_NONCE:
-                       EPA_PACE_Collect_Nonce(c, &ack);
+                       EPA_PACE_Collect_Nonce(c);
                        break;
                        
                case CMD_READER_MIFARE:
                        break;
                        
                case CMD_READER_MIFARE:
@@ -760,12 +823,36 @@ void UsbPacketReceived(uint8_t *packet, int len)
                case CMD_MIFARE_READBL:
                        MifareReadBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
                        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->arg[1], c->d.asBytes);
+                       break;
+               case CMD_MIFAREUC_AUTH1:
+                       MifareUC_Auth1(c->arg[0],c->d.asBytes);
+                       break;
+               case CMD_MIFAREUC_AUTH2:
+                       MifareUC_Auth2(c->arg[0],c->d.asBytes);
+                       break;
+               case CMD_MIFAREU_READCARD:
+                       MifareUReadCard(c->arg[0], c->arg[1], c->d.asBytes);
+                       break;
+               case CMD_MIFAREUC_READCARD:
+                       MifareUReadCard(c->arg[0], c->arg[1], c->d.asBytes);
+                       break;
+               case CMD_MIFAREUC_SETPWD: 
+                       MifareUSetPwd(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_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_NESTED:
                        MifareNested(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
                        break;
@@ -794,17 +881,21 @@ void UsbPacketReceived(uint8_t *packet, int len)
                        break;
                        
                // Work with "magic Chinese" card
                        break;
                        
                // Work with "magic Chinese" card
-               case CMD_MIFARE_EML_CSETBLOCK:
+               case CMD_MIFARE_CSETBLOCK:
                        MifareCSetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
                        break;
                        MifareCSetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
                        break;
-               case CMD_MIFARE_EML_CGETBLOCK:
+               case CMD_MIFARE_CGETBLOCK:
                        MifareCGetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
                        break;
                        MifareCGetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
                        break;
+               case CMD_MIFARE_CIDENT:
+                       MifareCIdent();
+                       break;
                        
                // mifare sniffer
                case CMD_MIFARE_SNIFFER:
                        SniffMifare(c->arg[0]);
                        break;
                        
                // mifare sniffer
                case CMD_MIFARE_SNIFFER:
                        SniffMifare(c->arg[0]);
                        break;
+
 #endif
 
 #ifdef WITH_ICLASS
 #endif
 
 #ifdef WITH_ICLASS
@@ -813,11 +904,17 @@ void UsbPacketReceived(uint8_t *packet, int len)
                        SnoopIClass();
                        break;
                case CMD_SIMULATE_TAG_ICLASS:
                        SnoopIClass();
                        break;
                case CMD_SIMULATE_TAG_ICLASS:
-                       SimulateIClass(c->arg[0], c->d.asBytes);
+                       SimulateIClass(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
                        break;
                case CMD_READER_ICLASS:
                        ReaderIClass(c->arg[0]);
                        break;
                        break;
                case CMD_READER_ICLASS:
                        ReaderIClass(c->arg[0]);
                        break;
+               case CMD_READER_ICLASS_REPLAY:
+                   ReaderIClass_Replay(c->arg[0], c->d.asBytes);
+                       break;
+       case CMD_ICLASS_EML_MEMSET:
+                       emlSet(c->d.asBytes,c->arg[0], c->arg[1]);
+                       break;
 #endif
 
                case CMD_SIMULATE_TAG_HF_LISTEN:
 #endif
 
                case CMD_SIMULATE_TAG_HF_LISTEN:
@@ -825,7 +922,7 @@ void UsbPacketReceived(uint8_t *packet, int len)
                        break;
 
                case CMD_BUFF_CLEAR:
                        break;
 
                case CMD_BUFF_CLEAR:
-                       BufferClear();
+                       BigBuf_Clear();
                        break;
 
                case CMD_MEASURE_ANTENNA_TUNING:
                        break;
 
                case CMD_MEASURE_ANTENNA_TUNING:
@@ -846,32 +943,31 @@ void UsbPacketReceived(uint8_t *packet, int len)
                        LED_D_OFF(); // LED D indicates field ON or OFF
                        break;
 
                        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.asDwords, BigBuf+c->arg[0], 12*sizeof(uint32_t));
+               case CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K:
+
                        LED_B_ON();
                        LED_B_ON();
-                       UsbSendPacket((uint8_t *)&n, sizeof(n));
+                       uint8_t *BigBuf = BigBuf_get_addr();
+                       for(size_t i=0; i<c->arg[1]; i += USB_CMD_DATA_SIZE) {
+                               size_t len = MIN((c->arg[1] - i),USB_CMD_DATA_SIZE);
+                               cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K,i,len,BigBuf_get_traceLen(),BigBuf+c->arg[0]+i,len);
+                       }
+                       // Trigger a finish downloading signal with an ACK frame
+                       cmd_send(CMD_ACK,1,0,BigBuf_get_traceLen(),getSamplingConfig(),sizeof(sample_config));
                        LED_B_OFF();
                        LED_B_OFF();
-               } break;
+                       break;
 
                case CMD_DOWNLOADED_SIM_SAMPLES_125K: {
 
                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));
-               } break;
-
+                       uint8_t *b = BigBuf_get_addr();
+                       memcpy(b+c->arg[0], c->d.asBytes, USB_CMD_DATA_SIZE);
+                       cmd_send(CMD_ACK,0,0,0,0,0);
+                       break;
+               }       
                case CMD_READ_MEM:
                        ReadMem(c->arg[0]);
                        break;
 
                case CMD_SET_LF_DIVISOR:
                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;
 
                        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, c->arg[0]);
                        break;
 
@@ -898,43 +994,41 @@ void UsbPacketReceived(uint8_t *packet, int len)
 #endif
                case CMD_SETUP_WRITE:
                case CMD_FINISH_WRITE:
 #endif
                case CMD_SETUP_WRITE:
                case CMD_FINISH_WRITE:
-               case CMD_HARDWARE_RESET: {
-                       USB_D_PLUS_PULLUP_OFF();
+               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.
                        }
                        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;
+                       break;
 
 
-               case CMD_START_FLASH: {
+               case CMD_START_FLASH:
                        if(common_area.flags.bootrom_present) {
                                common_area.command = COMMON_AREA_COMMAND_ENTER_FLASH_MODE;
                        }
                        if(common_area.flags.bootrom_present) {
                                common_area.command = COMMON_AREA_COMMAND_ENTER_FLASH_MODE;
                        }
-                       USB_D_PLUS_PULLUP_OFF();
+                       usb_disable();
                        AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;
                        for(;;);
                        AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;
                        for(;;);
-        } break;
+                       break;
 
                case CMD_DEVICE_INFO: {
 
                case CMD_DEVICE_INFO: {
-                       UsbCommand c;
-                       c.cmd = CMD_DEVICE_INFO;
-                       c.arg[0] = DEVICE_INFO_FLAG_OSIMAGE_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_OS;
-                       if(common_area.flags.bootrom_present) c.arg[0] |= DEVICE_INFO_FLAG_BOOTROM_PRESENT;
-                       UsbSendPacket((uint8_t*)&c, sizeof(c));
-               } break;
-            
-               default: {
+                       uint32_t dev_info = DEVICE_INFO_FLAG_OSIMAGE_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_OS;
+                       if(common_area.flags.bootrom_present) dev_info |= DEVICE_INFO_FLAG_BOOTROM_PRESENT;
+                       cmd_send(CMD_DEVICE_INFO,dev_info,0,0,0,0);     
+                       break;
+               }
+               default:
                        Dbprintf("%s: 0x%04x","unknown command:",c->cmd);
                        Dbprintf("%s: 0x%04x","unknown command:",c->cmd);
-        } break;
+                       break;
        }
 }
 
 void  __attribute__((noreturn)) AppMain(void)
 {
        SpinDelay(100);
        }
 }
 
 void  __attribute__((noreturn)) AppMain(void)
 {
        SpinDelay(100);
-
+       clear_trace();
        if(common_area.magic != COMMON_AREA_MAGIC || common_area.version != 1) {
                /* Initialize common area */
                memset(&common_area, 0, sizeof(common_area));
        if(common_area.magic != COMMON_AREA_MAGIC || common_area.version != 1) {
                /* Initialize common area */
                memset(&common_area, 0, sizeof(common_area));
@@ -948,7 +1042,8 @@ void  __attribute__((noreturn)) AppMain(void)
        LED_B_OFF();
        LED_A_OFF();
 
        LED_B_OFF();
        LED_A_OFF();
 
-       UsbStart();
+       // Init USB device
+  usb_enable();
 
        // The FPGA gets its clock from us from PCK0 output, so set that up.
        AT91C_BASE_PIOA->PIO_BSR = GPIO_PCK0;
 
        // The FPGA gets its clock from us from PCK0 output, so set that up.
        AT91C_BASE_PIOA->PIO_BSR = GPIO_PCK0;
@@ -965,38 +1060,25 @@ void  __attribute__((noreturn)) AppMain(void)
        AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;
 
        // Load the FPGA image, which we have stored in our flash.
        AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;
 
        // Load the FPGA image, which we have stored in our flash.
-       FpgaDownloadAndGo();
+       // (the HF version by default)
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
        StartTickCount();
 
        StartTickCount();
-       
+       
 #ifdef WITH_LCD
 #ifdef WITH_LCD
-
        LCDInit();
        LCDInit();
-
-       // test text on different colored backgrounds
-       LCDString(" The quick brown fox  ",     (char *)&FONT6x8,1,1+8*0,WHITE  ,BLACK );
-       LCDString("  jumped over the     ",     (char *)&FONT6x8,1,1+8*1,BLACK  ,WHITE );
-       LCDString("     lazy dog.        ",     (char *)&FONT6x8,1,1+8*2,YELLOW ,RED   );
-       LCDString(" AaBbCcDdEeFfGgHhIiJj ",     (char *)&FONT6x8,1,1+8*3,RED    ,GREEN );
-       LCDString(" KkLlMmNnOoPpQqRrSsTt ",     (char *)&FONT6x8,1,1+8*4,MAGENTA,BLUE  );
-       LCDString("UuVvWwXxYyZz0123456789",     (char *)&FONT6x8,1,1+8*5,BLUE   ,YELLOW);
-       LCDString("`-=[]_;',./~!@#$%^&*()",     (char *)&FONT6x8,1,1+8*6,BLACK  ,CYAN  );
-       LCDString("     _+{}|:\\\"<>?     ",(char *)&FONT6x8,1,1+8*7,BLUE  ,MAGENTA);
-
-       // color bands
-       LCDFill(0, 1+8* 8, 132, 8, BLACK);
-       LCDFill(0, 1+8* 9, 132, 8, WHITE);
-       LCDFill(0, 1+8*10, 132, 8, RED);
-       LCDFill(0, 1+8*11, 132, 8, GREEN);
-       LCDFill(0, 1+8*12, 132, 8, BLUE);
-       LCDFill(0, 1+8*13, 132, 8, YELLOW);
-       LCDFill(0, 1+8*14, 132, 8, CYAN);
-       LCDFill(0, 1+8*15, 132, 8, MAGENTA);
-
 #endif
 
 #endif
 
+  byte_t rx[sizeof(UsbCommand)];
+       size_t rx_len;
+  
        for(;;) {
        for(;;) {
-               UsbPoll(FALSE);
+    if (usb_poll()) {
+      rx_len = usb_read(rx,sizeof(UsbCommand));
+      if (rx_len) {
+        UsbPacketReceived(rx,rx_len);
+      }
+    }
                WDT_HIT();
 
 #ifdef WITH_LF
                WDT_HIT();
 
 #ifdef WITH_LF
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