X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/d722c4ce7801988cec69aad84a3fe1386d80cd97..ad2a97824d54119f35f0248222bef7c621571e4f:/armsrc/appmain.c diff --git a/armsrc/appmain.c b/armsrc/appmain.c index 18b8d64a..b539e667 100644 --- a/armsrc/appmain.c +++ b/armsrc/appmain.c @@ -1,805 +1,1098 @@ -//----------------------------------------------------------------------------- -// The main application code. This is the first thing called after start.c -// executes. -// Jonathan Westhues, Mar 2006 -// Edits by Gerhard de Koning Gans, Sep 2007 (##) -//----------------------------------------------------------------------------- - - -#include -#include "apps.h" -#ifdef WITH_LCD -#include "fonts.h" -#include "LCD.h" -#endif - -// The large multi-purpose buffer, typically used to hold A/D samples, -// maybe pre-processed in some way. -DWORD BigBuf[16000]; - -//============================================================================= -// 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. -//============================================================================= - -BYTE ToSend[256]; -int ToSendMax; -static int ToSendBit; - -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(ToSendBit >= 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) -{ - UsbCommand c; - c.cmd = CMD_DEBUG_PRINT_STRING; - c.ext1 = strlen(str); - memcpy(c.d.asBytes, str, c.ext1); - - UsbSendPacket((BYTE *)&c, sizeof(c)); - // TODO fix USB so stupid things like this aren't req'd - SpinDelay(50); -} - -void DbpIntegers(int x1, int x2, int x3) -{ - UsbCommand c; - c.cmd = CMD_DEBUG_PRINT_INTEGERS; - c.ext1 = x1; - c.ext2 = x2; - c.ext3 = x3; - - UsbSendPacket((BYTE *)&c, sizeof(c)); - // XXX - SpinDelay(50); -} - -void AcquireRawAdcSamples125k(BOOL at134khz) -{ - BYTE *dest = (BYTE *)BigBuf; - int n = sizeof(BigBuf); - int i; - - memset(dest,0,n); - - if(at134khz) { - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); - } else { - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); - } - - // Connect the A/D to the peak-detected low-frequency path. - SetAdcMuxFor(GPIO_MUXSEL_LOPKD); - - // Give it a bit of time for the resonant antenna to settle. - SpinDelay(50); - - // Now set up the SSC to get the ADC samples that are now streaming at us. - FpgaSetupSsc(); - - i = 0; - for(;;) { - if(SSC_STATUS & (SSC_STATUS_TX_READY)) { - SSC_TRANSMIT_HOLDING = 0x43; - LED_D_ON(); - } - if(SSC_STATUS & (SSC_STATUS_RX_READY)) { - dest[i] = (BYTE)SSC_RECEIVE_HOLDING; - i++; - LED_D_OFF(); - if(i >= n) { - break; - } - } - } - DbpIntegers(dest[0], dest[1], at134khz); -} - -//----------------------------------------------------------------------------- -// 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) -{ - DWORD d; - - ADC_CONTROL = ADC_CONTROL_RESET; - ADC_MODE = ADC_MODE_PRESCALE(32) | ADC_MODE_STARTUP_TIME(16) | - ADC_MODE_SAMPLE_HOLD_TIME(8); - ADC_CHANNEL_ENABLE = ADC_CHANNEL(ch); - - ADC_CONTROL = ADC_CONTROL_START; - while(!(ADC_STATUS & ADC_END_OF_CONVERSION(ch))) - ; - d = ADC_CHANNEL_DATA(ch); - - return d; -} - -static int AvgAdc(int ch) -{ - int i; - int a = 0; - - for(i = 0; i < 32; i++) { - a += ReadAdc(ch); - } - - return (a + 15) >> 5; -} +//----------------------------------------------------------------------------- +// The main application code. This is the first thing called after start.c +// executes. +// Jonathan Westhues, Mar 2006 +// Edits by Gerhard de Koning Gans, Sep 2007 (##) +//----------------------------------------------------------------------------- + + +#include +#include +#include "apps.h" +#ifdef WITH_LCD +#include "fonts.h" +#include "LCD.h" +#endif + +// The large multi-purpose buffer, typically used to hold A/D samples, +// maybe pre-processed in some way. +DWORD BigBuf[16000]; +int usbattached = 0; + +//============================================================================= +// 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. +//============================================================================= + +BYTE ToSend[256]; +int ToSendMax; +static int ToSendBit; + + +void BufferClear(void) +{ + memset(BigBuf,0,sizeof(BigBuf)); + DbpString("Buffer cleared"); +} + +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(ToSendBit >= 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) +{ + /* this holds up stuff unless we're connected to usb */ +// if (!usbattached) +// return; + + UsbCommand c; + c.cmd = CMD_DEBUG_PRINT_STRING; + c.ext1 = strlen(str); + memcpy(c.d.asBytes, str, c.ext1); + + UsbSendPacket((BYTE *)&c, sizeof(c)); + // TODO fix USB so stupid things like this aren't req'd + SpinDelay(50); +} + +void DbpIntegers(int x1, int x2, int x3) +{ + /* this holds up stuff unless we're connected to usb */ +// if (!usbattached) +// return; + + UsbCommand c; + c.cmd = CMD_DEBUG_PRINT_INTEGERS; + c.ext1 = x1; + c.ext2 = x2; + c.ext3 = x3; + + UsbSendPacket((BYTE *)&c, sizeof(c)); + // XXX + SpinDelay(50); +} + +void AcquireRawAdcSamples125k(BOOL at134khz) +{ + if(at134khz) { + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); + } else { + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + } + + // Connect the A/D to the peak-detected low-frequency path. + SetAdcMuxFor(GPIO_MUXSEL_LOPKD); + + // Give it a bit of time for the resonant antenna to settle. + SpinDelay(50); + + // Now set up the SSC to get the ADC samples that are now streaming at us. + FpgaSetupSsc(); + + // Now call the acquisition routine + DoAcquisition125k(at134khz); +} + +// split into two routines so we can avoid timing issues after sending commands // +void DoAcquisition125k(BOOL at134khz) +{ + BYTE *dest = (BYTE *)BigBuf; + int n = sizeof(BigBuf); + int i; + + memset(dest,0,n); + i = 0; + for(;;) { + if(SSC_STATUS & (SSC_STATUS_TX_READY)) { + SSC_TRANSMIT_HOLDING = 0x43; + LED_D_ON(); + } + if(SSC_STATUS & (SSC_STATUS_RX_READY)) { + dest[i] = (BYTE)SSC_RECEIVE_HOLDING; + i++; + LED_D_OFF(); + if(i >= n) { + break; + } + } + } + DbpIntegers(dest[0], dest[1], at134khz); +} + +void ModThenAcquireRawAdcSamples125k(int delay_off,int period_0,int period_1,BYTE *command) +{ + BOOL at134khz; + + // see if 'h' was specified + if(command[strlen((char *) command) - 1] == 'h') + at134khz= TRUE; + else + at134khz= FALSE; + + if(at134khz) { + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); + } else { + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + } + + // Give it a bit of time for the resonant antenna to settle. + SpinDelay(50); + + // Now set up the SSC to get the ADC samples that are now streaming at us. + FpgaSetupSsc(); + + // now modulate the reader field + while(*command != '\0' && *command != ' ') + { + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LED_D_OFF(); + SpinDelayUs(delay_off); + if(at134khz) { + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); + } else { + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + } + LED_D_ON(); + if(*(command++) == '0') + SpinDelayUs(period_0); + else + SpinDelayUs(period_1); + } + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LED_D_OFF(); + SpinDelayUs(delay_off); + if(at134khz) { + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); + } else { + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + } + + // now do the read + DoAcquisition125k(at134khz); +} + +//----------------------------------------------------------------------------- +// 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) +{ + DWORD d; + + ADC_CONTROL = ADC_CONTROL_RESET; + ADC_MODE = ADC_MODE_PRESCALE(32) | ADC_MODE_STARTUP_TIME(16) | + ADC_MODE_SAMPLE_HOLD_TIME(8); + ADC_CHANNEL_ENABLE = ADC_CHANNEL(ch); + + ADC_CONTROL = ADC_CONTROL_START; + while(!(ADC_STATUS & ADC_END_OF_CONVERSION(ch))) + ; + d = ADC_CHANNEL_DATA(ch); + + return d; +} + +static int AvgAdc(int ch) +{ + int i; + int a = 0; + + for(i = 0; i < 32; i++) { + a += ReadAdc(ch); + } + + return (a + 15) >> 5; +} + +void MeasureAntennaTuning(void) +{ + BYTE *dest = (BYTE *)BigBuf; + int i, ptr = 0, adcval = 0, peak = 0, peakv = 0, peakf = 0;; + int vLf125 = 0, vLf134 = 0, vHf = 0; // in mV + + UsbCommand c; + + DbpString("Measuring antenna characteristics, please wait."); + memset(BigBuf,0,sizeof(BigBuf)); /* * Sweeps the useful LF range of the proxmark from * 46.8kHz (divisor=255) to 600kHz (divisor=19) and - * reads the voltage in the antenna: the result is a graph - * which should clearly show the resonating frequency of your - * LF antenna ( hopefully around 90 if it is tuned to 125kHz!) - */ -void SweepLFrange() -{ - BYTE *dest = (BYTE *)BigBuf; - int i; - - // clear buffer - memset(BigBuf,0,sizeof(BigBuf)); - - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); - for (i=255; i>19; i--) { - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, i); - SpinDelay(20); - dest[i] = (137500 * AvgAdc(4)) >> 18; - } -} - -void MeasureAntennaTuning(void) -{ -// Impedances are Zc = 1/(j*omega*C), in ohms -#define LF_TUNING_CAP_Z 1273 // 1 nF @ 125 kHz -#define HF_TUNING_CAP_Z 235 // 50 pF @ 13.56 MHz - - int vLf125, vLf134, vHf; // in mV - - UsbCommand c; - - // Let the FPGA drive the low-frequency antenna around 125 kHz. - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); - SpinDelay(20); - vLf125 = AvgAdc(4); - // Vref = 3.3V, and a 10000:240 voltage divider on the input - // can measure voltages up to 137500 mV - vLf125 = (137500 * vLf125) >> 10; - - // Let the FPGA drive the low-frequency antenna around 134 kHz. - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); - SpinDelay(20); - vLf134 = AvgAdc(4); - // Vref = 3.3V, and a 10000:240 voltage divider on the input - // can measure voltages up to 137500 mV - vLf134 = (137500 * vLf134) >> 10; - - // Let the FPGA drive the high-frequency antenna around 13.56 MHz. - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); - SpinDelay(20); - vHf = AvgAdc(5); - // Vref = 3300mV, and an 10:1 voltage divider on the input - // can measure voltages up to 33000 mV - vHf = (33000 * vHf) >> 10; - - c.cmd = CMD_MEASURED_ANTENNA_TUNING; - c.ext1 = (vLf125 << 0) | (vLf134 << 16); - c.ext2 = vHf; - c.ext3 = (LF_TUNING_CAP_Z << 0) | (HF_TUNING_CAP_Z << 16); - UsbSendPacket((BYTE *)&c, sizeof(c)); -} - -void SimulateTagLowFrequency(int period) -{ - int i; - BYTE *tab = (BYTE *)BigBuf; - - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_SIMULATOR); - - PIO_ENABLE = (1 << GPIO_SSC_DOUT) | (1 << GPIO_SSC_CLK); - - PIO_OUTPUT_ENABLE = (1 << GPIO_SSC_DOUT); - PIO_OUTPUT_DISABLE = (1 << GPIO_SSC_CLK); - -#define SHORT_COIL() LOW(GPIO_SSC_DOUT) -#define OPEN_COIL() HIGH(GPIO_SSC_DOUT) - - i = 0; - for(;;) { - while(!(PIO_PIN_DATA_STATUS & (1<0xFFF) { - DbpString("Tags can only have 44 bits."); - return; - } - fc(0,&n); - // special start of frame marker containing invalid bit sequences - fc(8, &n); fc(8, &n); // invalid - fc(8, &n); fc(10, &n); // logical 0 - fc(10, &n); fc(10, &n); // invalid - fc(8, &n); fc(10, &n); // logical 0 - - WDT_HIT(); - // manchester encode bits 43 to 32 - for (i=11; i>=0; i--) { - if ((i%4)==3) fc(0,&n); - if ((hi>>i)&1) { - fc(10, &n); fc(8, &n); // low-high transition - } else { - fc(8, &n); fc(10, &n); // high-low transition - } - } - - WDT_HIT(); - // manchester encode bits 31 to 0 - for (i=31; i>=0; i--) { - if ((i%4)==3) fc(0,&n); - if ((lo>>i)&1) { - fc(10, &n); fc(8, &n); // low-high transition - } else { - fc(8, &n); fc(10, &n); // high-low transition - } - } - - LED_A_ON(); - SimulateTagLowFrequency(n); - LED_A_OFF(); -} - -// loop to capture raw HID waveform then FSK demodulate the TAG ID from it -static void CmdHIDdemodFSK(void) -{ - BYTE *dest = (BYTE *)BigBuf; - int m=0, n=0, i=0, idx=0, found=0, lastval=0; - DWORD hi=0, lo=0; - - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); - - // Connect the A/D to the peak-detected low-frequency path. - SetAdcMuxFor(GPIO_MUXSEL_LOPKD); - - // Give it a bit of time for the resonant antenna to settle. - SpinDelay(50); - - // Now set up the SSC to get the ADC samples that are now streaming at us. - FpgaSetupSsc(); - - for(;;) { - WDT_HIT(); - LED_A_ON(); - if(BUTTON_PRESS()) { - LED_A_OFF(); - return; - } - - i = 0; - m = sizeof(BigBuf); - memset(dest,128,m); - for(;;) { - if(SSC_STATUS & (SSC_STATUS_TX_READY)) { - SSC_TRANSMIT_HOLDING = 0x43; - LED_D_ON(); - } - if(SSC_STATUS & (SSC_STATUS_RX_READY)) { - dest[i] = (BYTE)SSC_RECEIVE_HOLDING; - // we don't care about actual value, only if it's more or less than a - // threshold essentially we capture zero crossings for later analysis - if(dest[i] < 127) dest[i] = 0; else dest[i] = 1; - i++; - LED_D_OFF(); - if(i >= m) { - break; - } - } - } - - // FSK demodulator - - // sync to first lo-hi transition - for( idx=1; idx>1)&0xffff); - hi=0; - lo=0; - found=0; - } - } - if (found) { - if (dest[idx] && (!dest[idx+1]) ) { - hi=(hi<<1)|(lo>>31); - lo=(lo<<1)|0; - } else if ( (!dest[idx]) && dest[idx+1]) { - hi=(hi<<1)|(lo>>31); - lo=(lo<<1)|1; - } else { - found=0; - hi=0; - lo=0; - } - idx++; - } - if ( dest[idx] && dest[idx+1] && dest[idx+2] && (!dest[idx+3]) && (!dest[idx+4]) && (!dest[idx+5]) ) - { - found=1; - idx+=6; - if (found && (hi|lo)) { - DbpString("TAG ID"); - DbpIntegers(hi, lo, (lo>>1)&0xffff); - hi=0; - lo=0; - found=0; - } - } - } - WDT_HIT(); - } -} - -void SimulateTagHfListen(void) -{ - BYTE *dest = (BYTE *)BigBuf; - int n = sizeof(BigBuf); - BYTE 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. - 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(SSC_STATUS & (SSC_STATUS_TX_READY)) { - SSC_TRANSMIT_HOLDING = 0xff; - } - if(SSC_STATUS & (SSC_STATUS_RX_READY)) { - BYTE r = (BYTE)SSC_RECEIVE_HOLDING; - - v <<= 1; - if(r & 1) { - v |= 1; - } - p++; - - if(p >= 8) { - dest[i] = v; - v = 0; - p = 0; - i++; - - if(i >= n) { - break; - } - } - } - } - DbpString("simulate tag (now type bitsamples)"); -} - -void UsbPacketReceived(BYTE *packet, int len) -{ - UsbCommand *c = (UsbCommand *)packet; - - switch(c->cmd) { - case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K: - AcquireRawAdcSamples125k(c->ext1); - break; - - case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693: - AcquireRawAdcSamplesIso15693(); - break; - - case CMD_READER_ISO_15693: - ReaderIso15693(c->ext1); - break; - - case CMD_SIMTAG_ISO_15693: - SimTagIso15693(c->ext1); - break; - - case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443: - AcquireRawAdcSamplesIso14443(c->ext1); - break; + * 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!) + */ + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + for (i=255; i>19; i--) { + 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 + + dest[i] = adcval>>8; // scale int to fit in byte for graphing purposes + if(dest[i] > peak) { + peakv = adcval; + peak = dest[i]; + peakf = i; + ptr = i; + } + } + + // Let the FPGA drive the high-frequency antenna around 13.56 MHz. + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); + SpinDelay(20); + // Vref = 3300mV, and an 10:1 voltage divider on the input + // can measure voltages up to 33000 mV + vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10; + + c.cmd = CMD_MEASURED_ANTENNA_TUNING; + c.ext1 = (vLf125 << 0) | (vLf134 << 16); + c.ext2 = vHf; + c.ext3 = peakf | (peakv << 16); + UsbSendPacket((BYTE *)&c, sizeof(c)); +} + +void SimulateTagLowFrequency(int period, int ledcontrol) +{ + int i; + BYTE *tab = (BYTE *)BigBuf; + + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_SIMULATOR); + + PIO_ENABLE = (1 << GPIO_SSC_DOUT) | (1 << GPIO_SSC_CLK); + + PIO_OUTPUT_ENABLE = (1 << GPIO_SSC_DOUT); + PIO_OUTPUT_DISABLE = (1 << GPIO_SSC_CLK); + +#define SHORT_COIL() LOW(GPIO_SSC_DOUT) +#define OPEN_COIL() HIGH(GPIO_SSC_DOUT) + + i = 0; + for(;;) { + while(!(PIO_PIN_DATA_STATUS & (1<0xFFF) { + DbpString("Tags can only have 44 bits."); + return; + } + fc(0,&n); + // special start of frame marker containing invalid bit sequences + fc(8, &n); fc(8, &n); // invalid + fc(8, &n); fc(10, &n); // logical 0 + fc(10, &n); fc(10, &n); // invalid + fc(8, &n); fc(10, &n); // logical 0 + + WDT_HIT(); + // manchester encode bits 43 to 32 + for (i=11; i>=0; i--) { + if ((i%4)==3) fc(0,&n); + if ((hi>>i)&1) { + fc(10, &n); fc(8, &n); // low-high transition + } else { + fc(8, &n); fc(10, &n); // high-low transition + } + } + + WDT_HIT(); + // manchester encode bits 31 to 0 + for (i=31; i>=0; i--) { + if ((i%4)==3) fc(0,&n); + if ((lo>>i)&1) { + fc(10, &n); fc(8, &n); // low-high transition + } else { + fc(8, &n); fc(10, &n); // high-low transition + } + } + + if (ledcontrol) + LED_A_ON(); + SimulateTagLowFrequency(n, ledcontrol); + + if (ledcontrol) + LED_A_OFF(); +} + +// loop to capture raw HID waveform then FSK demodulate the TAG ID from it +static void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol) +{ + BYTE *dest = (BYTE *)BigBuf; + int m=0, n=0, i=0, idx=0, found=0, lastval=0; + DWORD hi=0, lo=0; + + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + + // Connect the A/D to the peak-detected low-frequency path. + SetAdcMuxFor(GPIO_MUXSEL_LOPKD); + + // Give it a bit of time for the resonant antenna to settle. + SpinDelay(50); + + // Now set up the SSC to get the ADC samples that are now streaming at us. + FpgaSetupSsc(); + + for(;;) { + WDT_HIT(); + if (ledcontrol) + LED_A_ON(); + if(BUTTON_PRESS()) { + DbpString("Stopped"); + if (ledcontrol) + LED_A_OFF(); + return; + } + + i = 0; + m = sizeof(BigBuf); + memset(dest,128,m); + for(;;) { + if(SSC_STATUS & (SSC_STATUS_TX_READY)) { + SSC_TRANSMIT_HOLDING = 0x43; + if (ledcontrol) + LED_D_ON(); + } + if(SSC_STATUS & (SSC_STATUS_RX_READY)) { + dest[i] = (BYTE)SSC_RECEIVE_HOLDING; + // we don't care about actual value, only if it's more or less than a + // threshold essentially we capture zero crossings for later analysis + if(dest[i] < 127) dest[i] = 0; else dest[i] = 1; + i++; + if (ledcontrol) + LED_D_OFF(); + if(i >= m) { + break; + } + } + } + + // FSK demodulator + + // sync to first lo-hi transition + for( idx=1; idx>1)&0xffff); + /* if we're only looking for one tag */ + if (findone) + { + *high = hi; + *low = lo; + return; + } + hi=0; + lo=0; + found=0; + } + } + if (found) { + if (dest[idx] && (!dest[idx+1]) ) { + hi=(hi<<1)|(lo>>31); + lo=(lo<<1)|0; + } else if ( (!dest[idx]) && dest[idx+1]) { + hi=(hi<<1)|(lo>>31); + lo=(lo<<1)|1; + } else { + found=0; + hi=0; + lo=0; + } + idx++; + } + if ( dest[idx] && dest[idx+1] && dest[idx+2] && (!dest[idx+3]) && (!dest[idx+4]) && (!dest[idx+5]) ) + { + found=1; + idx+=6; + if (found && (hi|lo)) { + DbpString("TAG ID"); + DbpIntegers(hi, lo, (lo>>1)&0xffff); + /* if we're only looking for one tag */ + if (findone) + { + *high = hi; + *low = lo; + return; + } + hi=0; + lo=0; + found=0; + } + } + } + WDT_HIT(); + } +} + +void SimulateTagHfListen(void) +{ + BYTE *dest = (BYTE *)BigBuf; + int n = sizeof(BigBuf); + BYTE 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. + 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(SSC_STATUS & (SSC_STATUS_TX_READY)) { + SSC_TRANSMIT_HOLDING = 0xff; + } + if(SSC_STATUS & (SSC_STATUS_RX_READY)) { + BYTE r = (BYTE)SSC_RECEIVE_HOLDING; + + v <<= 1; + if(r & 1) { + v |= 1; + } + p++; + + if(p >= 8) { + dest[i] = v; + v = 0; + p = 0; + i++; + + if(i >= n) { + break; + } + } + } + } + DbpString("simulate tag (now type bitsamples)"); +} + +void UsbPacketReceived(BYTE *packet, int len) +{ + UsbCommand *c = (UsbCommand *)packet; + + switch(c->cmd) { + case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K: + AcquireRawAdcSamples125k(c->ext1); + break; + + case CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K: + ModThenAcquireRawAdcSamples125k(c->ext1,c->ext2,c->ext3,c->d.asBytes); + break; + + case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693: + AcquireRawAdcSamplesIso15693(); + break; + + case CMD_BUFF_CLEAR: + BufferClear(); + break; + + case CMD_READER_ISO_15693: + ReaderIso15693(c->ext1); + break; + + case CMD_SIMTAG_ISO_15693: + SimTagIso15693(c->ext1); + break; + + case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443: + AcquireRawAdcSamplesIso14443(c->ext1); + break; case CMD_READ_SRI512_TAG: ReadSRI512Iso14443(c->ext1); break; - - case CMD_READER_ISO_14443a: - ReaderIso14443a(c->ext1); - break; - - case CMD_SNOOP_ISO_14443: - SnoopIso14443(); - break; - - case CMD_SNOOP_ISO_14443a: - SnoopIso14443a(); - break; - - case CMD_SIMULATE_TAG_HF_LISTEN: - SimulateTagHfListen(); - break; - - case CMD_SIMULATE_TAG_ISO_14443: - SimulateIso14443Tag(); - break; - - case CMD_SIMULATE_TAG_ISO_14443a: - SimulateIso14443aTag(c->ext1, c->ext2); // ## Simulate iso14443a tag - pass tag type & UID - break; - - case CMD_MEASURE_ANTENNA_TUNING: - MeasureAntennaTuning(); - break; - - case CMD_HID_DEMOD_FSK: - CmdHIDdemodFSK(); // Demodulate HID tag - break; - - case CMD_HID_SIM_TAG: - CmdHIDsimTAG(c->ext1, c->ext2); // Simulate HID tag by ID - 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: - case CMD_DOWNLOAD_RAW_BITS_TI_TYPE: { - UsbCommand n; - if(c->cmd == CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K) { - n.cmd = CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K; - } else { - n.cmd = CMD_DOWNLOADED_RAW_BITS_TI_TYPE; - } - n.ext1 = c->ext1; - memcpy(n.d.asDwords, BigBuf+c->ext1, 12*sizeof(DWORD)); - UsbSendPacket((BYTE *)&n, sizeof(n)); - break; - } - case CMD_DOWNLOADED_SIM_SAMPLES_125K: { - BYTE *b = (BYTE *)BigBuf; - memcpy(b+c->ext1, c->d.asBytes, 48); - break; - } - case CMD_SIMULATE_TAG_125K: - LED_A_ON(); - SimulateTagLowFrequency(c->ext1); - LED_A_OFF(); - break; -#ifdef WITH_LCD - case CMD_LCD_RESET: - LCDReset(); - break; -#endif - case CMD_SWEEP_LF: - SweepLFrange(); - break; - - case CMD_SET_LF_DIVISOR: - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, c->ext1); - break; -#ifdef WITH_LCD - case CMD_LCD: - LCDSend(c->ext1); - break; -#endif - case CMD_SETUP_WRITE: - case CMD_FINISH_WRITE: - case CMD_HARDWARE_RESET: - USB_D_PLUS_PULLUP_OFF(); - SpinDelay(1000); - SpinDelay(1000); - RSTC_CONTROL = RST_CONTROL_KEY | RST_CONTROL_PROCESSOR_RESET; - for(;;) { - // We're going to reset, and the bootrom will take control. - } - break; - - - default: - DbpString("unknown command"); - break; - } -} - -void AppMain(void) -{ - memset(BigBuf,0,sizeof(BigBuf)); - SpinDelay(100); - - LED_D_OFF(); - LED_C_OFF(); - LED_B_OFF(); - LED_A_OFF(); - - UsbStart(); - - // The FPGA gets its clock from us from PCK0 output, so set that up. - PIO_PERIPHERAL_B_SEL = (1 << GPIO_PCK0); - PIO_DISABLE = (1 << GPIO_PCK0); - PMC_SYS_CLK_ENABLE = PMC_SYS_CLK_PROGRAMMABLE_CLK_0; - // PCK0 is PLL clock / 4 = 96Mhz / 4 = 24Mhz - PMC_PROGRAMMABLE_CLK_0 = PMC_CLK_SELECTION_PLL_CLOCK | - PMC_CLK_PRESCALE_DIV_4; - PIO_OUTPUT_ENABLE = (1 << GPIO_PCK0); - - // Reset SPI - SPI_CONTROL = SPI_CONTROL_RESET; - // Reset SSC - SSC_CONTROL = SSC_CONTROL_RESET; - - // Load the FPGA image, which we have stored in our flash. - FpgaDownloadAndGo(); - -#ifdef WITH_LCD - - LCDInit(); - - // test text on different colored backgrounds - LCDString(" The quick brown fox ", &FONT6x8,1,1+8*0,WHITE ,BLACK ); - LCDString(" jumped over the ", &FONT6x8,1,1+8*1,BLACK ,WHITE ); - LCDString(" lazy dog. ", &FONT6x8,1,1+8*2,YELLOW ,RED ); - LCDString(" AaBbCcDdEeFfGgHhIiJj ", &FONT6x8,1,1+8*3,RED ,GREEN ); - LCDString(" KkLlMmNnOoPpQqRrSsTt ", &FONT6x8,1,1+8*4,MAGENTA,BLUE ); - LCDString("UuVvWwXxYyZz0123456789", &FONT6x8,1,1+8*5,BLUE ,YELLOW); - LCDString("`-=[]_;',./~!@#$%^&*()", &FONT6x8,1,1+8*6,BLACK ,CYAN ); - LCDString(" _+{}|:\\\"<>? ",&FONT6x8,1,1+8*7,BLUE ,MAGENTA); - - // color bands - LCDFill(0, 1+8* 8, 132, 8, BLACK); - LCDFill(0, 1+8* 9, 132, 8, WHITE); - LCDFill(0, 1+8*10, 132, 8, RED); - LCDFill(0, 1+8*11, 132, 8, GREEN); - LCDFill(0, 1+8*12, 132, 8, BLUE); - LCDFill(0, 1+8*13, 132, 8, YELLOW); - LCDFill(0, 1+8*14, 132, 8, CYAN); - LCDFill(0, 1+8*15, 132, 8, MAGENTA); - -#endif - - for(;;) { - UsbPoll(FALSE); - WDT_HIT(); - } -} - -void SpinDelay(int ms) -{ - int ticks = (48000*ms) >> 10; - - // Borrow a PWM unit for my real-time clock - PWM_ENABLE = PWM_CHANNEL(0); - // 48 MHz / 1024 gives 46.875 kHz - PWM_CH_MODE(0) = PWM_CH_MODE_PRESCALER(10); - PWM_CH_DUTY_CYCLE(0) = 0; - PWM_CH_PERIOD(0) = 0xffff; - - WORD start = (WORD)PWM_CH_COUNTER(0); - - for(;;) { - WORD now = (WORD)PWM_CH_COUNTER(0); - if(now == (WORD)(start + ticks)) { - return; - } - WDT_HIT(); - } -} + + case CMD_READER_ISO_14443a: + ReaderIso14443a(c->ext1); + break; + + case CMD_SNOOP_ISO_14443: + SnoopIso14443(); + break; + + case CMD_SNOOP_ISO_14443a: + SnoopIso14443a(); + break; + + case CMD_SIMULATE_TAG_HF_LISTEN: + SimulateTagHfListen(); + break; + + case CMD_SIMULATE_TAG_ISO_14443: + SimulateIso14443Tag(); + break; + + case CMD_SIMULATE_TAG_ISO_14443a: + SimulateIso14443aTag(c->ext1, c->ext2); // ## Simulate iso14443a tag - pass tag type & UID + break; + + case CMD_MEASURE_ANTENNA_TUNING: + MeasureAntennaTuning(); + break; + + case CMD_LISTEN_READER_FIELD: + ListenReaderField(c->ext1); + break; + + case CMD_HID_DEMOD_FSK: + CmdHIDdemodFSK(0, 0, 0, 1); // Demodulate HID tag + break; + + case CMD_HID_SIM_TAG: + CmdHIDsimTAG(c->ext1, c->ext2, 1); // Simulate HID tag by ID + 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: + case CMD_DOWNLOAD_RAW_BITS_TI_TYPE: { + UsbCommand n; + if(c->cmd == CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K) { + n.cmd = CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K; + } else { + n.cmd = CMD_DOWNLOADED_RAW_BITS_TI_TYPE; + } + n.ext1 = c->ext1; + memcpy(n.d.asDwords, BigBuf+c->ext1, 12*sizeof(DWORD)); + UsbSendPacket((BYTE *)&n, sizeof(n)); + break; + } + case CMD_DOWNLOADED_SIM_SAMPLES_125K: { + BYTE *b = (BYTE *)BigBuf; + memcpy(b+c->ext1, c->d.asBytes, 48); + break; + } + case CMD_SIMULATE_TAG_125K: + LED_A_ON(); + SimulateTagLowFrequency(c->ext1, 1); + LED_A_OFF(); + break; +#ifdef WITH_LCD + case CMD_LCD_RESET: + LCDReset(); + break; +#endif + case CMD_READ_MEM: + ReadMem(c->ext1); + break; + case CMD_SET_LF_DIVISOR: + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, c->ext1); + break; +#ifdef WITH_LCD + case CMD_LCD: + LCDSend(c->ext1); + break; +#endif + case CMD_SETUP_WRITE: + case CMD_FINISH_WRITE: + case CMD_HARDWARE_RESET: + USB_D_PLUS_PULLUP_OFF(); + SpinDelay(1000); + SpinDelay(1000); + RSTC_CONTROL = RST_CONTROL_KEY | RST_CONTROL_PROCESSOR_RESET; + for(;;) { + // We're going to reset, and the bootrom will take control. + } + break; + + + default: + DbpString("unknown command"); + break; + } +} + +void ReadMem(int addr) +{ + const DWORD *data = ((DWORD *)addr); + int i; + + DbpString("Reading memory at address"); + DbpIntegers(0, 0, addr); + for (i = 0; i < 8; i+= 2) + DbpIntegers(0, data[i], data[i+1]); +} + +void AppMain(void) +{ + memset(BigBuf,0,sizeof(BigBuf)); + SpinDelay(100); + + LED_D_OFF(); + LED_C_OFF(); + LED_B_OFF(); + LED_A_OFF(); + + UsbStart(); + + // The FPGA gets its clock from us from PCK0 output, so set that up. + PIO_PERIPHERAL_B_SEL = (1 << GPIO_PCK0); + PIO_DISABLE = (1 << GPIO_PCK0); + PMC_SYS_CLK_ENABLE = PMC_SYS_CLK_PROGRAMMABLE_CLK_0; + // PCK0 is PLL clock / 4 = 96Mhz / 4 = 24Mhz + PMC_PROGRAMMABLE_CLK_0 = PMC_CLK_SELECTION_PLL_CLOCK | + PMC_CLK_PRESCALE_DIV_4; + PIO_OUTPUT_ENABLE = (1 << GPIO_PCK0); + + // Reset SPI + SPI_CONTROL = SPI_CONTROL_RESET; + // Reset SSC + SSC_CONTROL = SSC_CONTROL_RESET; + + // Load the FPGA image, which we have stored in our flash. + FpgaDownloadAndGo(); + +#ifdef WITH_LCD + + LCDInit(); + + // test text on different colored backgrounds + LCDString(" The quick brown fox ", &FONT6x8,1,1+8*0,WHITE ,BLACK ); + LCDString(" jumped over the ", &FONT6x8,1,1+8*1,BLACK ,WHITE ); + LCDString(" lazy dog. ", &FONT6x8,1,1+8*2,YELLOW ,RED ); + LCDString(" AaBbCcDdEeFfGgHhIiJj ", &FONT6x8,1,1+8*3,RED ,GREEN ); + LCDString(" KkLlMmNnOoPpQqRrSsTt ", &FONT6x8,1,1+8*4,MAGENTA,BLUE ); + LCDString("UuVvWwXxYyZz0123456789", &FONT6x8,1,1+8*5,BLUE ,YELLOW); + LCDString("`-=[]_;',./~!@#$%^&*()", &FONT6x8,1,1+8*6,BLACK ,CYAN ); + LCDString(" _+{}|:\\\"<>? ",&FONT6x8,1,1+8*7,BLUE ,MAGENTA); + + // color bands + LCDFill(0, 1+8* 8, 132, 8, BLACK); + LCDFill(0, 1+8* 9, 132, 8, WHITE); + LCDFill(0, 1+8*10, 132, 8, RED); + LCDFill(0, 1+8*11, 132, 8, GREEN); + LCDFill(0, 1+8*12, 132, 8, BLUE); + LCDFill(0, 1+8*13, 132, 8, YELLOW); + LCDFill(0, 1+8*14, 132, 8, CYAN); + LCDFill(0, 1+8*15, 132, 8, MAGENTA); + +#endif + + for(;;) { + usbattached = UsbPoll(FALSE); + WDT_HIT(); + + if (BUTTON_HELD(1000) > 0) + SamyRun(); + } +} + + +// samy's sniff and repeat routine +void SamyRun() +{ + DbpString("Stand-alone mode! No PC necessary."); + + // 3 possible options? no just 2 for now +#define OPTS 2 + + int high[OPTS], low[OPTS]; + + // Oooh pretty -- notify user we're in elite samy mode now + LED(LED_RED, 200); + LED(LED_ORANGE, 200); + LED(LED_GREEN, 200); + LED(LED_ORANGE, 200); + LED(LED_RED, 200); + LED(LED_ORANGE, 200); + LED(LED_GREEN, 200); + LED(LED_ORANGE, 200); + LED(LED_RED, 200); + + int selected = 0; + int playing = 0; + + // Turn on selected LED + LED(selected + 1, 0); + + for (;;) + { + usbattached = UsbPoll(FALSE); + WDT_HIT(); + + // Was our button held down or pressed? + int button_pressed = BUTTON_HELD(1000); + SpinDelay(300); + + // Button was held for a second, begin recording + if (button_pressed > 0) + { + LEDsoff(); + LED(selected + 1, 0); + LED(LED_RED2, 0); + + // record + DbpString("Starting recording"); + + // wait for button to be released + while(BUTTON_PRESS()) + WDT_HIT(); + + /* need this delay to prevent catching some weird data */ + SpinDelay(500); + + CmdHIDdemodFSK(1, &high[selected], &low[selected], 0); + DbpString("Recorded"); + DbpIntegers(selected, high[selected], low[selected]); + + LEDsoff(); + LED(selected + 1, 0); + // Finished recording + + // If we were previously playing, set playing off + // so next button push begins playing what we recorded + playing = 0; + } + + // Change where to record (or begin playing) + else if (button_pressed) + { + // Next option if we were previously playing + if (playing) + selected = (selected + 1) % OPTS; + playing = !playing; + + LEDsoff(); + LED(selected + 1, 0); + + // Begin transmitting + if (playing) + { + LED(LED_GREEN, 0); + DbpString("Playing"); + // wait for button to be released + while(BUTTON_PRESS()) + WDT_HIT(); + DbpIntegers(selected, high[selected], low[selected]); + CmdHIDsimTAG(high[selected], low[selected], 0); + DbpString("Done playing"); + if (BUTTON_HELD(1000) > 0) + { + DbpString("Exiting"); + LEDsoff(); + return; + } + + /* We pressed a button so ignore it here with a delay */ + SpinDelay(300); + + // when done, we're done playing, move to next option + selected = (selected + 1) % OPTS; + playing = !playing; + LEDsoff(); + LED(selected + 1, 0); + } + else + while(BUTTON_PRESS()) + WDT_HIT(); + } + } +} + + +// listen for external reader +void ListenReaderField(int limit) +{ + int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0; + int hf_av, hf_av_new, hf_baseline= 0, hf_count= 0; + +#define LF_ONLY 1 +#define HF_ONLY 2 + + LED_A_OFF(); + LED_B_OFF(); + LED_C_OFF(); + LED_D_OFF(); + + lf_av= ReadAdc(ADC_CHAN_LF); + + if(limit != HF_ONLY) + { + DbpString("LF 125/134 Baseline:"); + DbpIntegers(lf_av,0,0); + lf_baseline= lf_av; + } + + hf_av= ReadAdc(ADC_CHAN_HF); + + + if (limit != LF_ONLY) + { + DbpString("HF 13.56 Baseline:"); + DbpIntegers(hf_av,0,0); + hf_baseline= hf_av; + } + + for(;;) + { + if(BUTTON_PRESS()) + { + DbpString("Stopped"); + LED_B_OFF(); + LED_D_OFF(); + return; + } + WDT_HIT(); + + + if (limit != HF_ONLY) + { + if (abs(lf_av - lf_baseline) > 10) + LED_D_ON(); + else + LED_D_OFF(); + ++lf_count; + lf_av_new= ReadAdc(ADC_CHAN_LF); + // see if there's a significant change + if(abs(lf_av - lf_av_new) > 10) + { + DbpString("LF 125/134 Field Change:"); + DbpIntegers(lf_av,lf_av_new,lf_count); + lf_av= lf_av_new; + lf_count= 0; + } + } + + if (limit != LF_ONLY) + { + if (abs(hf_av - hf_baseline) > 10) + LED_B_ON(); + else + LED_B_OFF(); + ++hf_count; + hf_av_new= ReadAdc(ADC_CHAN_HF); + // see if there's a significant change + if(abs(hf_av - hf_av_new) > 10) + { + DbpString("HF 13.56 Field Change:"); + DbpIntegers(hf_av,hf_av_new,hf_count); + hf_av= hf_av_new; + hf_count= 0; + } + } + } +}