X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e98300f2455f72b64df737b3a81c072b6b3761e3..3179383f8549b98eaa977c03105cdec7af5007dc:/armsrc/lfops.c?ds=sidebyside diff --git a/armsrc/lfops.c b/armsrc/lfops.c index 0eb3503d..b9dbb8e2 100644 --- a/armsrc/lfops.c +++ b/armsrc/lfops.c @@ -14,31 +14,16 @@ #include "hitag2.h" #include "crc16.h" #include "string.h" +#include "lfdemod.h" -void AcquireRawAdcSamples125k(int at134khz) -{ - if (at134khz) - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz - else - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); - - // Connect the A/D to the peak-detected low-frequency path. - SetAdcMuxFor(GPIO_MUXSEL_LOPKD); - - // Give it a bit of time for the resonant antenna to settle. - SpinDelay(50); - // Now set up the SSC to get the ADC samples that are now streaming at us. - FpgaSetupSsc(); - - // Now call the acquisition routine - DoAcquisition125k(); -} - -// split into two routines so we can avoid timing issues after sending commands // -void DoAcquisition125k(void) +/** +* Does the sample acquisition. If threshold is specified, the actual sampling +* is not commenced until the threshold has been reached. +* @param trigger_threshold - the threshold +* @param silent - is true, now outputs are made. If false, dbprints the status +*/ +void DoAcquisition125k_internal(int trigger_threshold,bool silent) { uint8_t *dest = (uint8_t *)BigBuf; int n = sizeof(BigBuf); @@ -53,38 +38,95 @@ void DoAcquisition125k(void) } if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) { dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - i++; LED_D_OFF(); - if (i >= n) break; + if (trigger_threshold != -1 && dest[i] < trigger_threshold) + continue; + else + trigger_threshold = -1; + if (++i >= n) break; } } - Dbprintf("buffer samples: %02x %02x %02x %02x %02x %02x %02x %02x ...", - dest[0], dest[1], dest[2], dest[3], dest[4], dest[5], dest[6], dest[7]); + if(!silent) + { + Dbprintf("buffer samples: %02x %02x %02x %02x %02x %02x %02x %02x ...", + dest[0], dest[1], dest[2], dest[3], dest[4], dest[5], dest[6], dest[7]); + + } +} +/** +* Perform sample aquisition. +*/ +void DoAcquisition125k(int trigger_threshold) +{ + DoAcquisition125k_internal(trigger_threshold, false); +} + +/** +* Setup the FPGA to listen for samples. This method downloads the FPGA bitstream +* if not already loaded, sets divisor and starts up the antenna. +* @param divisor : 1, 88> 255 or negative ==> 134.8 KHz +* 0 or 95 ==> 125 KHz +* +**/ +void LFSetupFPGAForADC(int divisor, bool lf_field) +{ + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); + if ( (divisor == 1) || (divisor < 0) || (divisor > 255) ) + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz + else if (divisor == 0) + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + else + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor); + + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | (lf_field ? FPGA_LF_ADC_READER_FIELD : 0)); + + // 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(); +} +/** +* Initializes the FPGA, and acquires the samples. +**/ +void AcquireRawAdcSamples125k(int divisor) +{ + LFSetupFPGAForADC(divisor, true); + // Now call the acquisition routine + DoAcquisition125k_internal(-1,false); +} +/** +* Initializes the FPGA for snoop-mode, and acquires the samples. +**/ + +void SnoopLFRawAdcSamples(int divisor, int trigger_threshold) +{ + LFSetupFPGAForADC(divisor, false); + DoAcquisition125k(trigger_threshold); } void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, uint8_t *command) { - int at134khz; /* Make sure the tag is reset */ + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); SpinDelay(2500); + + int divisor_used = 95; // 125 KHz // 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 - else - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + if (command[strlen((char *) command) - 1] == 'h') + divisor_used = 88; // 134.8 KHz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor_used); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); // Give it a bit of time for the resonant antenna to settle. SpinDelay(50); + // And a little more time for the tag to fully power up SpinDelay(2000); @@ -96,12 +138,9 @@ void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LED_D_OFF(); SpinDelayUs(delay_off); - if (at134khz) - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz - else - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor_used); - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); LED_D_ON(); if(*(command++) == '0') SpinDelayUs(period_0); @@ -111,15 +150,12 @@ void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LED_D_OFF(); SpinDelayUs(delay_off); - if (at134khz) - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz - else - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor_used); - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); // now do the read - DoAcquisition125k(); + DoAcquisition125k(-1); } /* blank r/w tag data stream @@ -137,15 +173,12 @@ void ReadTItag(void) // when we read a TI tag we sample the zerocross line at 2Mhz // TI tags modulate a 1 as 16 cycles of 123.2Khz // TI tags modulate a 0 as 16 cycles of 134.2Khz - #define FSAMPLE 2000000 - #define FREQLO 123200 - #define FREQHI 134200 + #define FSAMPLE 2000000 + #define FREQLO 123200 + #define FREQHI 134200 signed char *dest = (signed char *)BigBuf; int n = sizeof(BigBuf); -// int *dest = GraphBuffer; -// int n = GraphTraceLen; - // 128 bit shift register [shift3:shift2:shift1:shift0] uint32_t shift3 = 0, shift2 = 0, shift1 = 0, shift0 = 0; @@ -156,6 +189,7 @@ void ReadTItag(void) uint32_t threshold = (sampleslo - sampleshi + 1)>>1; // TI tags charge at 134.2Khz + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz // Place FPGA in passthrough mode, in this mode the CROSS_LO line @@ -180,10 +214,10 @@ void ReadTItag(void) // TI bits are coming to us lsb first so shift them // right through our 128 bit right shift register - shift0 = (shift0>>1) | (shift1 << 31); - shift1 = (shift1>>1) | (shift2 << 31); - shift2 = (shift2>>1) | (shift3 << 31); - shift3 >>= 1; + shift0 = (shift0>>1) | (shift1 << 31); + shift1 = (shift1>>1) | (shift2 << 31); + shift2 = (shift2>>1) | (shift3 << 31); + shift3 >>= 1; // check if the cycles fall close to the number // expected for either the low or high frequency @@ -218,18 +252,18 @@ void ReadTItag(void) if (cycles!=0xF0B) { DbpString("Info: No valid tag detected."); } else { - // put 64 bit data into shift1 and shift0 - shift0 = (shift0>>24) | (shift1 << 8); - shift1 = (shift1>>24) | (shift2 << 8); + // put 64 bit data into shift1 and shift0 + shift0 = (shift0>>24) | (shift1 << 8); + shift1 = (shift1>>24) | (shift2 << 8); // align 16 bit crc into lower half of shift2 - shift2 = ((shift2>>24) | (shift3 << 8)) & 0x0ffff; + shift2 = ((shift2>>24) | (shift3 << 8)) & 0x0ffff; // if r/w tag, check ident match - if ( shift3&(1<<15) ) { + if (shift3 & (1<<15) ) { DbpString("Info: TI tag is rewriteable"); // only 15 bits compare, last bit of ident is not valid - if ( ((shift3>>16)^shift0)&0x7fff ) { + if (((shift3 >> 16) ^ shift0) & 0x7fff ) { DbpString("Error: Ident mismatch!"); } else { DbpString("Info: TI tag ident is valid"); @@ -244,7 +278,7 @@ void ReadTItag(void) // calculate CRC uint32_t crc=0; - crc = update_crc16(crc, (shift0)&0xff); + crc = update_crc16(crc, (shift0)&0xff); crc = update_crc16(crc, (shift0>>8)&0xff); crc = update_crc16(crc, (shift0>>16)&0xff); crc = update_crc16(crc, (shift0>>24)&0xff); @@ -254,7 +288,7 @@ void ReadTItag(void) crc = update_crc16(crc, (shift1>>24)&0xff); Dbprintf("Info: Tag data: %x%08x, crc=%x", - (unsigned int)shift1, (unsigned int)shift0, (unsigned int)shift2 & 0xFFFF); + (unsigned int)shift1, (unsigned int)shift0, (unsigned int)shift2 & 0xFFFF); if (crc != (shift2&0xffff)) { Dbprintf("Error: CRC mismatch, expected %x", (unsigned int)crc); } else { @@ -293,7 +327,7 @@ void AcquireTiType(void) int i, j, n; // tag transmission is <20ms, sampling at 2M gives us 40K samples max // each sample is 1 bit stuffed into a uint32_t so we need 1250 uint32_t - #define TIBUFLEN 1250 + #define TIBUFLEN 1250 // clear buffer memset(BigBuf,0,sizeof(BigBuf)); @@ -363,8 +397,9 @@ void AcquireTiType(void) // if not provided a valid crc will be computed from the data and written. void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc) { + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); if(crc == 0) { - crc = update_crc16(crc, (idlo)&0xff); + crc = update_crc16(crc, (idlo)&0xff); crc = update_crc16(crc, (idlo>>8)&0xff); crc = update_crc16(crc, (idlo>>16)&0xff); crc = update_crc16(crc, (idlo>>24)&0xff); @@ -374,7 +409,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc) crc = update_crc16(crc, (idhi>>24)&0xff); } Dbprintf("Writing to tag: %x%08x, crc=%x", - (unsigned int) idhi, (unsigned int) idlo, crc); + (unsigned int) idhi, (unsigned int) idlo, crc); // TI tags charge at 134.2Khz FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz @@ -433,17 +468,18 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol) { int i; uint8_t *tab = (uint8_t *)BigBuf; - + + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT); - + AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK; - + AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT; AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK; - + #define SHORT_COIL() LOW(GPIO_SSC_DOUT) #define OPEN_COIL() HIGH(GPIO_SSC_DOUT) - + i = 0; for(;;) { while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) { @@ -453,18 +489,18 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol) } WDT_HIT(); } - + if (ledcontrol) LED_D_ON(); - + if(tab[i]) OPEN_COIL(); else SHORT_COIL(); - + if (ledcontrol) LED_D_OFF(); - + while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) { if(BUTTON_PRESS()) { DbpString("Stopped"); @@ -472,7 +508,7 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol) } WDT_HIT(); } - + i++; if(i == period) { i = 0; @@ -592,220 +628,210 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol) LED_A_OFF(); } - -// loop to capture raw HID waveform then FSK demodulate the TAG ID from it +// loop to get raw HID waveform then FSK demodulate the TAG ID from it void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol) { uint8_t *dest = (uint8_t *)BigBuf; - int m=0, n=0, i=0, idx=0, found=0, lastval=0; + + size_t size=0; //, found=0; uint32_t hi2=0, hi=0, lo=0; - FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + // Configure to go in 125Khz listen mode + LFSetupFPGAForADC(95, true); - // Connect the A/D to the peak-detected low-frequency path. - SetAdcMuxFor(GPIO_MUXSEL_LOPKD); + while(!BUTTON_PRESS()) { - // Give it a bit of time for the resonant antenna to settle. - SpinDelay(50); + WDT_HIT(); + if (ledcontrol) LED_A_ON(); - // Now set up the SSC to get the ADC samples that are now streaming at us. - FpgaSetupSsc(); + DoAcquisition125k_internal(-1,true); + // FSK demodulator + size = HIDdemodFSK(dest, sizeof(BigBuf), &hi2, &hi, &lo); - 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(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x43; - if (ledcontrol) - LED_D_ON(); - } - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - // 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; + if (size>0 && lo>0){ + // final loop, go over previously decoded manchester data and decode into usable tag ID + // 111000 bit pattern represent start of frame, 01 pattern represents a 1 and 10 represents a 0 + if (hi2 != 0){ //extra large HID tags + Dbprintf("TAG ID: %x%08x%08x (%d)", + (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); + }else { //standard HID tags <38 bits + //Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd + uint8_t bitlen = 0; + uint32_t fc = 0; + uint32_t cardnum = 0; + if (((hi>>5)&1) == 1){//if bit 38 is set then < 37 bit format is used + uint32_t lo2=0; + lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit + uint8_t idx3 = 1; + while(lo2 > 1){ //find last bit set to 1 (format len bit) + lo2=lo2 >> 1; + idx3++; + } + bitlen = idx3+19; + fc =0; + cardnum=0; + if(bitlen == 26){ + cardnum = (lo>>1)&0xFFFF; + fc = (lo>>17)&0xFF; + } + if(bitlen == 37){ + cardnum = (lo>>1)&0x7FFFF; + fc = ((hi&0xF)<<12)|(lo>>20); + } + if(bitlen == 34){ + cardnum = (lo>>1)&0xFFFF; + fc= ((hi&1)<<15)|(lo>>17); + } + if(bitlen == 35){ + cardnum = (lo>>1)&0xFFFFF; + fc = ((hi&1)<<11)|(lo>>21); + } + } + else { //if bit 38 is not set then 37 bit format is used + bitlen= 37; + fc =0; + cardnum=0; + if(bitlen==37){ + cardnum = (lo>>1)&0x7FFFF; + fc = ((hi&0xF)<<12)|(lo>>20); + } } + //Dbprintf("TAG ID: %x%08x (%d)", + // (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); + Dbprintf("TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d", + (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF, + (unsigned int) bitlen, (unsigned int) fc, (unsigned int) cardnum); + } + if (findone){ + if (ledcontrol) LED_A_OFF(); + return; } + // reset + hi2 = hi = lo = 0; } + WDT_HIT(); + } + DbpString("Stopped"); + if (ledcontrol) LED_A_OFF(); +} - // FSK demodulator +void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol) +{ + uint8_t *dest = (uint8_t *)BigBuf; - // sync to first lo-hi transition - for( idx=1; idx=0){ + lo = Em410xDecode(dest,size); + //Dbprintf("DEBUG: EM GOT"); + if (lo>0){ + Dbprintf("EM TAG ID: %02x%08x - (%05d_%03d_%08d)", + (uint32_t)(lo>>32), + (uint32_t)lo, + (uint32_t)(lo&0xFFFF), + (uint32_t)((lo>>16LL) & 0xFF), + (uint32_t)(lo & 0xFFFFFF)); + } + if (findone){ + if (ledcontrol) LED_A_OFF(); + return; } + } else{ + //Dbprintf("DEBUG: No Tag"); } - m=i; WDT_HIT(); + lo = 0; + clk=0; + invert=0; + errCnt=0; + size=0; + } + DbpString("Stopped"); + if (ledcontrol) LED_A_OFF(); +} - // final loop, go over previously decoded manchester data and decode into usable tag ID - // 111000 bit pattern represent start of frame, 01 pattern represents a 1 and 10 represents a 0 - for( idx=0; idx>1) & 0xFFFF); - } - else { - Dbprintf("TAG ID: %x%08x (%d)", - (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); - } - /* if we're only looking for one tag */ - if (findone) - { - *high = hi; - *low = lo; - return; - } - hi2=0; - hi=0; - lo=0; - found=0; - } - } - if (found) { - if (dest[idx] && (!dest[idx+1]) ) { - hi2=(hi2<<1)|(hi>>31); - hi=(hi<<1)|(lo>>31); - lo=(lo<<1)|0; - } else if ( (!dest[idx]) && dest[idx+1]) { - hi2=(hi2<<1)|(hi>>31); - hi=(hi<<1)|(lo>>31); - lo=(lo<<1)|1; - } else { - found=0; - hi2=0; - hi=0; - lo=0; - } - idx++; +void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol) +{ + uint8_t *dest = (uint8_t *)BigBuf; + int idx=0; + uint32_t code=0, code2=0; + uint8_t version=0; + uint8_t facilitycode=0; + uint16_t number=0; + // Configure to go in 125Khz listen mode + LFSetupFPGAForADC(95, true); + + while(!BUTTON_PRESS()) { + WDT_HIT(); + if (ledcontrol) LED_A_ON(); + DoAcquisition125k_internal(-1,true); + //fskdemod and get start index + WDT_HIT(); + idx = IOdemodFSK(dest,sizeof(BigBuf)); + if (idx>0){ + //valid tag found + + //Index map + //0 10 20 30 40 50 60 + //| | | | | | | + //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23 + //----------------------------------------------------------------------------- + //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11 + // + //XSF(version)facility:codeone+codetwo + //Handle the data + if(findone){ //only print binary if we are doing one + Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx], dest[idx+1], dest[idx+2],dest[idx+3],dest[idx+4],dest[idx+5],dest[idx+6],dest[idx+7],dest[idx+8]); + Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15],dest[idx+16],dest[idx+17]); + Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23],dest[idx+24],dest[idx+25],dest[idx+26]); + Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31],dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35]); + Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39],dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44]); + Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+45],dest[idx+46],dest[idx+47],dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53]); + Dbprintf("%d%d%d%d%d%d%d%d %d%d",dest[idx+54],dest[idx+55],dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]); } - 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)) { - if (hi2 != 0){ - Dbprintf("TAG ID: %x%08x%08x (%d)", - (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); - } - else { - Dbprintf("TAG ID: %x%08x (%d)", - (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); - } - /* if we're only looking for one tag */ - if (findone) - { - *high = hi; - *low = lo; - return; - } - hi2=0; - hi=0; - lo=0; - found=0; - } + code = bytebits_to_byte(dest+idx,32); + code2 = bytebits_to_byte(dest+idx+32,32); + version = bytebits_to_byte(dest+idx+27,8); //14,4 + facilitycode = bytebits_to_byte(dest+idx+18,8) ; + number = (bytebits_to_byte(dest+idx+36,8)<<8)|(bytebits_to_byte(dest+idx+45,8)); //36,9 + + Dbprintf("XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2); + // if we're only looking for one tag + if (findone){ + if (ledcontrol) LED_A_OFF(); + //LED_A_OFF(); + return; } + code=code2=0; + version=facilitycode=0; + number=0; + idx=0; } WDT_HIT(); } + DbpString("Stopped"); + if (ledcontrol) LED_A_OFF(); } - /*------------------------------ * T5555/T5557/T5567 routines *------------------------------ @@ -873,8 +899,9 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol) // Write one bit to card void T55xxWriteBit(int bit) { + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); if (bit == 0) SpinDelayUs(WRITE_0); else @@ -886,10 +913,12 @@ void T55xxWriteBit(int bit) // Write one card block in page 0, no lock void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode) { - unsigned int i; + //unsigned int i; //enio adjustment 12/10/14 + uint32_t i; + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); // Give it a bit of time for the resonant antenna to settle. // And for the tag to fully power up @@ -906,7 +935,7 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMod // Pwd for (i = 0x80000000; i != 0; i >>= 1) T55xxWriteBit(Pwd & i); - } + } // Lock bit T55xxWriteBit(0); @@ -921,20 +950,20 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMod // Now perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550, // so wait a little more) FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); SpinDelay(20); FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); } - -// Read one card block in page 0 +// Read one card block in page 0 void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode) { uint8_t *dest = (uint8_t *)BigBuf; - int m=0, i=0; - + //int m=0, i=0; //enio adjustment 12/10/14 + uint32_t m=0, i=0; + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); m = sizeof(BigBuf); - // Clear destination buffer before sending the command + // Clear destination buffer before sending the command memset(dest, 128, m); // Connect the A/D to the peak-detected low-frequency path. SetAdcMuxFor(GPIO_MUXSEL_LOPKD); @@ -943,7 +972,7 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode) LED_D_ON(); FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); // Give it a bit of time for the resonant antenna to settle. // And for the tag to fully power up @@ -960,18 +989,18 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode) // Pwd for (i = 0x80000000; i != 0; i >>= 1) T55xxWriteBit(Pwd & i); - } + } // Lock bit T55xxWriteBit(0); // Block for (i = 0x04; i != 0; i >>= 1) T55xxWriteBit(Block & i); - - // Turn field on to read the response + + // Turn field on to read the response FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); - // Now do the acquisition + // Now do the acquisition i = 0; for(;;) { if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) { @@ -981,24 +1010,25 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode) dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR; // 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; + // if(dest[i] < 127) dest[i] = 0; else dest[i] = 1; i++; if (i >= m) break; } } - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off LED_D_OFF(); DbpString("DONE!"); } // Read card traceability data (page 1) -void T55xxReadTrace(void){ +void T55xxReadTrace(void){ uint8_t *dest = (uint8_t *)BigBuf; int m=0, i=0; - + + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); m = sizeof(BigBuf); - // Clear destination buffer before sending the command + // Clear destination buffer before sending the command memset(dest, 128, m); // Connect the A/D to the peak-detected low-frequency path. SetAdcMuxFor(GPIO_MUXSEL_LOPKD); @@ -1007,7 +1037,7 @@ void T55xxReadTrace(void){ LED_D_ON(); FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); // Give it a bit of time for the resonant antenna to settle. // And for the tag to fully power up @@ -1020,12 +1050,12 @@ void T55xxReadTrace(void){ // Opcode T55xxWriteBit(1); T55xxWriteBit(1); //Page 1 - - // Turn field on to read the response + + // Turn field on to read the response FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); - // Now do the acquisition + // Now do the acquisition i = 0; for(;;) { if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) { @@ -1038,7 +1068,7 @@ void T55xxReadTrace(void){ } } - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off LED_D_OFF(); DbpString("DONE!"); } @@ -1047,100 +1077,100 @@ void T55xxReadTrace(void){ // Copy HID id to card and setup block 0 config void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) { - int data1, data2, data3, data4, data5, data6; //up to six blocks for long format + int data1=0, data2=0, data3=0, data4=0, data5=0, data6=0; //up to six blocks for long format int last_block = 0; - if (longFMT){ - // Ensure no more than 84 bits supplied - if (hi2>0xFFFFF) { - DbpString("Tags can only have 84 bits."); - return; - } - // Build the 6 data blocks for supplied 84bit ID - last_block = 6; - data1 = 0x1D96A900; // load preamble (1D) & long format identifier (9E manchester encoded) - for (int i=0;i<4;i++) { - if (hi2 & (1<<(19-i))) - data1 |= (1<<(((3-i)*2)+1)); // 1 -> 10 - else - data1 |= (1<<((3-i)*2)); // 0 -> 01 - } - - data2 = 0; - for (int i=0;i<16;i++) { - if (hi2 & (1<<(15-i))) - data2 |= (1<<(((15-i)*2)+1)); // 1 -> 10 - else - data2 |= (1<<((15-i)*2)); // 0 -> 01 - } - - data3 = 0; - for (int i=0;i<16;i++) { - if (hi & (1<<(31-i))) - data3 |= (1<<(((15-i)*2)+1)); // 1 -> 10 - else - data3 |= (1<<((15-i)*2)); // 0 -> 01 - } - - data4 = 0; - for (int i=0;i<16;i++) { - if (hi & (1<<(15-i))) - data4 |= (1<<(((15-i)*2)+1)); // 1 -> 10 - else - data4 |= (1<<((15-i)*2)); // 0 -> 01 - } - - data5 = 0; - for (int i=0;i<16;i++) { - if (lo & (1<<(31-i))) - data5 |= (1<<(((15-i)*2)+1)); // 1 -> 10 - else - data5 |= (1<<((15-i)*2)); // 0 -> 01 - } - - data6 = 0; - for (int i=0;i<16;i++) { - if (lo & (1<<(15-i))) - data6 |= (1<<(((15-i)*2)+1)); // 1 -> 10 - else - data6 |= (1<<((15-i)*2)); // 0 -> 01 - } - } - else { - // Ensure no more than 44 bits supplied - if (hi>0xFFF) { - DbpString("Tags can only have 44 bits."); - return; - } - - // Build the 3 data blocks for supplied 44bit ID - last_block = 3; - - data1 = 0x1D000000; // load preamble - - for (int i=0;i<12;i++) { - if (hi & (1<<(12-i))) - data1 |= (1<<(((12-i)*2)+1)); // 1 -> 10 - else - data1 |= (1<<((12-i)*2)); // 0 -> 01 - } - - data2 = 0; - for (int i=0;i<16;i++) { - if (lo & (1<<(31-i))) - data2 |= (1<<(((15-i)*2)+1)); // 1 -> 10 - else - data2 |= (1<<((15-i)*2)); // 0 -> 01 - } - - data3 = 0; - for (int i=0;i<16;i++) { - if (lo & (1<<(15-i))) - data3 |= (1<<(((15-i)*2)+1)); // 1 -> 10 - else - data3 |= (1<<((15-i)*2)); // 0 -> 01 - } - } + if (longFMT){ + // Ensure no more than 84 bits supplied + if (hi2>0xFFFFF) { + DbpString("Tags can only have 84 bits."); + return; + } + // Build the 6 data blocks for supplied 84bit ID + last_block = 6; + data1 = 0x1D96A900; // load preamble (1D) & long format identifier (9E manchester encoded) + for (int i=0;i<4;i++) { + if (hi2 & (1<<(19-i))) + data1 |= (1<<(((3-i)*2)+1)); // 1 -> 10 + else + data1 |= (1<<((3-i)*2)); // 0 -> 01 + } + + data2 = 0; + for (int i=0;i<16;i++) { + if (hi2 & (1<<(15-i))) + data2 |= (1<<(((15-i)*2)+1)); // 1 -> 10 + else + data2 |= (1<<((15-i)*2)); // 0 -> 01 + } + + data3 = 0; + for (int i=0;i<16;i++) { + if (hi & (1<<(31-i))) + data3 |= (1<<(((15-i)*2)+1)); // 1 -> 10 + else + data3 |= (1<<((15-i)*2)); // 0 -> 01 + } + + data4 = 0; + for (int i=0;i<16;i++) { + if (hi & (1<<(15-i))) + data4 |= (1<<(((15-i)*2)+1)); // 1 -> 10 + else + data4 |= (1<<((15-i)*2)); // 0 -> 01 + } + + data5 = 0; + for (int i=0;i<16;i++) { + if (lo & (1<<(31-i))) + data5 |= (1<<(((15-i)*2)+1)); // 1 -> 10 + else + data5 |= (1<<((15-i)*2)); // 0 -> 01 + } + + data6 = 0; + for (int i=0;i<16;i++) { + if (lo & (1<<(15-i))) + data6 |= (1<<(((15-i)*2)+1)); // 1 -> 10 + else + data6 |= (1<<((15-i)*2)); // 0 -> 01 + } + } + else { + // Ensure no more than 44 bits supplied + if (hi>0xFFF) { + DbpString("Tags can only have 44 bits."); + return; + } + + // Build the 3 data blocks for supplied 44bit ID + last_block = 3; + + data1 = 0x1D000000; // load preamble + + for (int i=0;i<12;i++) { + if (hi & (1<<(11-i))) + data1 |= (1<<(((11-i)*2)+1)); // 1 -> 10 + else + data1 |= (1<<((11-i)*2)); // 0 -> 01 + } + + data2 = 0; + for (int i=0;i<16;i++) { + if (lo & (1<<(31-i))) + data2 |= (1<<(((15-i)*2)+1)); // 1 -> 10 + else + data2 |= (1<<((15-i)*2)); // 0 -> 01 + } + + data3 = 0; + for (int i=0;i<16;i++) { + if (lo & (1<<(15-i))) + data3 |= (1<<(((15-i)*2)+1)); // 1 -> 10 + else + data3 |= (1<<((15-i)*2)); // 0 -> 01 + } + } LED_D_ON(); // Program the data blocks for supplied ID @@ -1148,21 +1178,41 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) T55xxWriteBlock(data1,1,0,0); T55xxWriteBlock(data2,2,0,0); T55xxWriteBlock(data3,3,0,0); - + if (longFMT) { // if long format there are 6 blocks - T55xxWriteBlock(data4,4,0,0); - T55xxWriteBlock(data5,5,0,0); - T55xxWriteBlock(data6,6,0,0); - } + T55xxWriteBlock(data4,4,0,0); + T55xxWriteBlock(data5,5,0,0); + T55xxWriteBlock(data6,6,0,0); + } // Config for HID (RF/50, FSK2a, Maxblock=3 for short/6 for long) T55xxWriteBlock(T55x7_BITRATE_RF_50 | - T55x7_MODULATION_FSK2a | - last_block << T55x7_MAXBLOCK_SHIFT, - 0,0,0); - + T55x7_MODULATION_FSK2a | + last_block << T55x7_MAXBLOCK_SHIFT, + 0,0,0); + LED_D_OFF(); - + + DbpString("DONE!"); +} + +void CopyIOtoT55x7(uint32_t hi, uint32_t lo, uint8_t longFMT) +{ + int data1=0, data2=0; //up to six blocks for long format + + data1 = hi; // load preamble + data2 = lo; + + LED_D_ON(); + // Program the data blocks for supplied ID + // and the block 0 for HID format + T55xxWriteBlock(data1,1,0,0); + T55xxWriteBlock(data2,2,0,0); + + //Config Block + T55xxWriteBlock(0x00147040,0,0,0); + LED_D_OFF(); + DbpString("DONE!"); } @@ -1177,6 +1227,7 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) uint64_t rev_id = 0; // reversed ID int c_parity[4]; // column parity int r_parity = 0; // row parity + uint32_t clock = 0; // Reverse ID bits given as parameter (for simpler operations) for (i = 0; i < EM410X_ID_LENGTH; ++i) { @@ -1234,22 +1285,45 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) T55xxWriteBlock((uint32_t)id, 2, 0, 0); // Config for EM410x (RF/64, Manchester, Maxblock=2) - if (card) + if (card) { + // Clock rate is stored in bits 8-15 of the card value + clock = (card & 0xFF00) >> 8; + Dbprintf("Clock rate: %d", clock); + switch (clock) + { + case 32: + clock = T55x7_BITRATE_RF_32; + break; + case 16: + clock = T55x7_BITRATE_RF_16; + break; + case 0: + // A value of 0 is assumed to be 64 for backwards-compatibility + // Fall through... + case 64: + clock = T55x7_BITRATE_RF_64; + break; + default: + Dbprintf("Invalid clock rate: %d", clock); + return; + } + // Writing configuration for T55x7 tag - T55xxWriteBlock(T55x7_BITRATE_RF_64 | - T55x7_MODULATION_MANCHESTER | - 2 << T55x7_MAXBLOCK_SHIFT, - 0, 0, 0); + T55xxWriteBlock(clock | + T55x7_MODULATION_MANCHESTER | + 2 << T55x7_MAXBLOCK_SHIFT, + 0, 0, 0); + } else // Writing configuration for T5555(Q5) tag T55xxWriteBlock(0x1F << T5555_BITRATE_SHIFT | - T5555_MODULATION_MANCHESTER | - 2 << T5555_MAXBLOCK_SHIFT, - 0, 0, 0); + T5555_MODULATION_MANCHESTER | + 2 << T5555_MAXBLOCK_SHIFT, + 0, 0, 0); LED_D_OFF(); Dbprintf("Tag %s written with 0x%08x%08x\n", card ? "T55x7":"T5555", - (uint32_t)(id >> 32), (uint32_t)id); + (uint32_t)(id >> 32), (uint32_t)id); } // Clone Indala 64-bit tag by UID to T55x7 @@ -1262,15 +1336,15 @@ void CopyIndala64toT55x7(int hi, int lo) T55xxWriteBlock(lo,2,0,0); //Config for Indala (RF/32;PSK1 with RF/2;Maxblock=2) T55xxWriteBlock(T55x7_BITRATE_RF_32 | - T55x7_MODULATION_PSK1 | - 2 << T55x7_MAXBLOCK_SHIFT, - 0,0,0); + T55x7_MODULATION_PSK1 | + 2 << T55x7_MAXBLOCK_SHIFT, + 0, 0, 0); //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=2;Inverse data) -// T5567WriteBlock(0x603E1042,0); + // T5567WriteBlock(0x603E1042,0); DbpString("DONE!"); -} +} void CopyIndala224toT55x7(int uid1, int uid2, int uid3, int uid4, int uid5, int uid6, int uid7) { @@ -1286,12 +1360,493 @@ void CopyIndala224toT55x7(int uid1, int uid2, int uid3, int uid4, int uid5, int T55xxWriteBlock(uid7,7,0,0); //Config for Indala (RF/32;PSK1 with RF/2;Maxblock=7) T55xxWriteBlock(T55x7_BITRATE_RF_32 | - T55x7_MODULATION_PSK1 | - 7 << T55x7_MAXBLOCK_SHIFT, - 0,0,0); + T55x7_MODULATION_PSK1 | + 7 << T55x7_MAXBLOCK_SHIFT, + 0,0,0); //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=7;Inverse data) -// T5567WriteBlock(0x603E10E2,0); + // T5567WriteBlock(0x603E10E2,0); DbpString("DONE!"); } + + +#define abs(x) ( ((x)<0) ? -(x) : (x) ) +#define max(x,y) ( x GraphBuffer[0]) { + while(i < GraphTraceLen) { + if( !(GraphBuffer[i] > GraphBuffer[i-1]) && GraphBuffer[i] > lmax) + break; + i++; + } + dir = 0; + } + else { + while(i < GraphTraceLen) { + if( !(GraphBuffer[i] < GraphBuffer[i-1]) && GraphBuffer[i] < lmin) + break; + i++; + } + dir = 1; + } + + lastval = i++; + half_switch = 0; + pmc = 0; + block_done = 0; + + for (bitidx = 0; i < GraphTraceLen; i++) + { + if ( (GraphBuffer[i-1] > GraphBuffer[i] && dir == 1 && GraphBuffer[i] > lmax) || (GraphBuffer[i-1] < GraphBuffer[i] && dir == 0 && GraphBuffer[i] < lmin)) + { + lc = i - lastval; + lastval = i; + + // Switch depending on lc length: + // Tolerance is 1/8 of clock rate (arbitrary) + if (abs(lc-clock/4) < tolerance) { + // 16T0 + if((i - pmc) == lc) { /* 16T0 was previous one */ + /* It's a PMC ! */ + i += (128+127+16+32+33+16)-1; + lastval = i; + pmc = 0; + block_done = 1; + } + else { + pmc = i; + } + } else if (abs(lc-clock/2) < tolerance) { + // 32TO + if((i - pmc) == lc) { /* 16T0 was previous one */ + /* It's a PMC ! */ + i += (128+127+16+32+33)-1; + lastval = i; + pmc = 0; + block_done = 1; + } + else if(half_switch == 1) { + BitStream[bitidx++] = 0; + half_switch = 0; + } + else + half_switch++; + } else if (abs(lc-clock) < tolerance) { + // 64TO + BitStream[bitidx++] = 1; + } else { + // Error + warnings++; + if (warnings > 10) + { + Dbprintf("Error: too many detection errors, aborting."); + return 0; + } + } + + if(block_done == 1) { + if(bitidx == 128) { + for(j=0; j<16; j++) { + Blocks[num_blocks][j] = 128*BitStream[j*8+7]+ + 64*BitStream[j*8+6]+ + 32*BitStream[j*8+5]+ + 16*BitStream[j*8+4]+ + 8*BitStream[j*8+3]+ + 4*BitStream[j*8+2]+ + 2*BitStream[j*8+1]+ + BitStream[j*8]; + } + num_blocks++; + } + bitidx = 0; + block_done = 0; + half_switch = 0; + } + if(i < GraphTraceLen) + { + if (GraphBuffer[i-1] > GraphBuffer[i]) dir=0; + else dir = 1; + } + } + if(bitidx==255) + bitidx=0; + warnings = 0; + if(num_blocks == 4) break; + } + memcpy(outBlocks, Blocks, 16*num_blocks); + return num_blocks; +} + +int IsBlock0PCF7931(uint8_t *Block) { + // Assume RFU means 0 :) + if((memcmp(Block, "\x00\x00\x00\x00\x00\x00\x00\x01", 8) == 0) && memcmp(Block+9, "\x00\x00\x00\x00\x00\x00\x00", 7) == 0) // PAC enabled + return 1; + if((memcmp(Block+9, "\x00\x00\x00\x00\x00\x00\x00", 7) == 0) && Block[7] == 0) // PAC disabled, can it *really* happen ? + return 1; + return 0; +} + +int IsBlock1PCF7931(uint8_t *Block) { + // Assume RFU means 0 :) + if(Block[10] == 0 && Block[11] == 0 && Block[12] == 0 && Block[13] == 0) + if((Block[14] & 0x7f) <= 9 && Block[15] <= 9) + return 1; + + return 0; +} + +#define ALLOC 16 + +void ReadPCF7931() { + uint8_t Blocks[8][17]; + uint8_t tmpBlocks[4][16]; + int i, j, ind, ind2, n; + int num_blocks = 0; + int max_blocks = 8; + int ident = 0; + int error = 0; + int tries = 0; + + memset(Blocks, 0, 8*17*sizeof(uint8_t)); + + do { + memset(tmpBlocks, 0, 4*16*sizeof(uint8_t)); + n = DemodPCF7931((uint8_t**)tmpBlocks); + if(!n) + error++; + if(error==10 && num_blocks == 0) { + Dbprintf("Error, no tag or bad tag"); + return; + } + else if (tries==20 || error==10) { + Dbprintf("Error reading the tag"); + Dbprintf("Here is the partial content"); + goto end; + } + + for(i=0; i= 0; ind--,ind2--) { + if(ind2 < 0) + ind2 = max_blocks; + if(!Blocks[ind2][ALLOC]) { // Block ind2 not already found + // Dbprintf("Tmp %d -> Block %d", ind, ind2); + memcpy(Blocks[ind2], tmpBlocks[ind], 16); + Blocks[ind2][ALLOC] = 1; + num_blocks++; + if(num_blocks == max_blocks) goto end; + } + } + for(ind=i+1,ind2=j+1; ind < n; ind++,ind2++) { + if(ind2 > max_blocks) + ind2 = 0; + if(!Blocks[ind2][ALLOC]) { // Block ind2 not already found + // Dbprintf("Tmp %d -> Block %d", ind, ind2); + memcpy(Blocks[ind2], tmpBlocks[ind], 16); + Blocks[ind2][ALLOC] = 1; + num_blocks++; + if(num_blocks == max_blocks) goto end; + } + } + } + } + } + } + } + tries++; + if (BUTTON_PRESS()) return; + } while (num_blocks != max_blocks); +end: + Dbprintf("-----------------------------------------"); + Dbprintf("Memory content:"); + Dbprintf("-----------------------------------------"); + for(i=0; i", i); + } + Dbprintf("-----------------------------------------"); + + return ; +} + + +//----------------------------------- +// EM4469 / EM4305 routines +//----------------------------------- +#define FWD_CMD_LOGIN 0xC //including the even parity, binary mirrored +#define FWD_CMD_WRITE 0xA +#define FWD_CMD_READ 0x9 +#define FWD_CMD_DISABLE 0x5 + + +uint8_t forwardLink_data[64]; //array of forwarded bits +uint8_t * forward_ptr; //ptr for forward message preparation +uint8_t fwd_bit_sz; //forwardlink bit counter +uint8_t * fwd_write_ptr; //forwardlink bit pointer + +//==================================================================== +// prepares command bits +// see EM4469 spec +//==================================================================== +//-------------------------------------------------------------------- +uint8_t Prepare_Cmd( uint8_t cmd ) { + //-------------------------------------------------------------------- + + *forward_ptr++ = 0; //start bit + *forward_ptr++ = 0; //second pause for 4050 code + + *forward_ptr++ = cmd; + cmd >>= 1; + *forward_ptr++ = cmd; + cmd >>= 1; + *forward_ptr++ = cmd; + cmd >>= 1; + *forward_ptr++ = cmd; + + return 6; //return number of emited bits +} + +//==================================================================== +// prepares address bits +// see EM4469 spec +//==================================================================== + +//-------------------------------------------------------------------- +uint8_t Prepare_Addr( uint8_t addr ) { + //-------------------------------------------------------------------- + + register uint8_t line_parity; + + uint8_t i; + line_parity = 0; + for(i=0;i<6;i++) { + *forward_ptr++ = addr; + line_parity ^= addr; + addr >>= 1; + } + + *forward_ptr++ = (line_parity & 1); + + return 7; //return number of emited bits +} + +//==================================================================== +// prepares data bits intreleaved with parity bits +// see EM4469 spec +//==================================================================== + +//-------------------------------------------------------------------- +uint8_t Prepare_Data( uint16_t data_low, uint16_t data_hi) { + //-------------------------------------------------------------------- + + register uint8_t line_parity; + register uint8_t column_parity; + register uint8_t i, j; + register uint16_t data; + + data = data_low; + column_parity = 0; + + for(i=0; i<4; i++) { + line_parity = 0; + for(j=0; j<8; j++) { + line_parity ^= data; + column_parity ^= (data & 1) << j; + *forward_ptr++ = data; + data >>= 1; + } + *forward_ptr++ = line_parity; + if(i == 1) + data = data_hi; + } + + for(j=0; j<8; j++) { + *forward_ptr++ = column_parity; + column_parity >>= 1; + } + *forward_ptr = 0; + + return 45; //return number of emited bits +} + +//==================================================================== +// Forward Link send function +// Requires: forwarLink_data filled with valid bits (1 bit per byte) +// fwd_bit_count set with number of bits to be sent +//==================================================================== +void SendForward(uint8_t fwd_bit_count) { + + fwd_write_ptr = forwardLink_data; + fwd_bit_sz = fwd_bit_count; + + LED_D_ON(); + + //Field on + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); + + // Give it a bit of time for the resonant antenna to settle. + // And for the tag to fully power up + SpinDelay(150); + + // force 1st mod pulse (start gap must be longer for 4305) + fwd_bit_sz--; //prepare next bit modulation + fwd_write_ptr++; + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off + SpinDelayUs(55*8); //55 cycles off (8us each)for 4305 + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on + SpinDelayUs(16*8); //16 cycles on (8us each) + + // now start writting + while(fwd_bit_sz-- > 0) { //prepare next bit modulation + if(((*fwd_write_ptr++) & 1) == 1) + SpinDelayUs(32*8); //32 cycles at 125Khz (8us each) + else { + //These timings work for 4469/4269/4305 (with the 55*8 above) + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off + SpinDelayUs(23*8); //16-4 cycles off (8us each) + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on + SpinDelayUs(9*8); //16 cycles on (8us each) + } + } +} + +void EM4xLogin(uint32_t Password) { + + uint8_t fwd_bit_count; + + forward_ptr = forwardLink_data; + fwd_bit_count = Prepare_Cmd( FWD_CMD_LOGIN ); + fwd_bit_count += Prepare_Data( Password&0xFFFF, Password>>16 ); + + SendForward(fwd_bit_count); + + //Wait for command to complete + SpinDelay(20); + +} + +void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) { + + uint8_t fwd_bit_count; + uint8_t *dest = (uint8_t *)BigBuf; + int m=0, i=0; + + //If password mode do login + if (PwdMode == 1) EM4xLogin(Pwd); + + forward_ptr = forwardLink_data; + fwd_bit_count = Prepare_Cmd( FWD_CMD_READ ); + fwd_bit_count += Prepare_Addr( Address ); + + m = sizeof(BigBuf); + // Clear destination buffer before sending the command + memset(dest, 128, m); + // Connect the A/D to the peak-detected low-frequency path. + SetAdcMuxFor(GPIO_MUXSEL_LOPKD); + // Now set up the SSC to get the ADC samples that are now streaming at us. + FpgaSetupSsc(); + + SendForward(fwd_bit_count); + + // Now do the acquisition + i = 0; + for(;;) { + if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) { + AT91C_BASE_SSC->SSC_THR = 0x43; + } + if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) { + dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + i++; + if (i >= m) break; + } + } + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off + LED_D_OFF(); +} + +void EM4xWriteWord(uint32_t Data, uint8_t Address, uint32_t Pwd, uint8_t PwdMode) { + + uint8_t fwd_bit_count; + + //If password mode do login + if (PwdMode == 1) EM4xLogin(Pwd); + + forward_ptr = forwardLink_data; + fwd_bit_count = Prepare_Cmd( FWD_CMD_WRITE ); + fwd_bit_count += Prepare_Addr( Address ); + fwd_bit_count += Prepare_Data( Data&0xFFFF, Data>>16 ); + + SendForward(fwd_bit_count); + + //Wait for write to complete + SpinDelay(20); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off + LED_D_OFF(); +}