From 111c6934d4e5c58883d08210399afe8eaeccc5c3 Mon Sep 17 00:00:00 2001 From: iceman1001 Date: Mon, 12 Sep 2016 09:19:49 +0200 Subject: [PATCH 1/1] CHG: Small steps, the waiting time between frames was unclear. At least now the tags answers to a readbyte command after the setup phase. --- armsrc/legicrf.c | 252 ++++++++++++++++++++------------------------ armsrc/util.c | 12 +-- client/cmdhflegic.c | 8 +- 3 files changed, 121 insertions(+), 151 deletions(-) diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c index 60e55938..572a870e 100644 --- a/armsrc/legicrf.c +++ b/armsrc/legicrf.c @@ -30,8 +30,6 @@ static int legic_phase_drift; static int legic_frame_drift; static int legic_reqresp_drift; -int timestamp; - AT91PS_TC timer; AT91PS_TC prng_timer; @@ -56,6 +54,18 @@ static void setup_timer(void) { prng_timer->TC_CMR = AT91C_TC_CLKS_TIMER_DIV2_CLOCK; prng_timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; } + + AT91C_BASE_PMC->PMC_PCER |= (0x1 << 12) | (0x1 << 13) | (0x1 << 14); + AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_TIOA0 | AT91C_TCB_TC2XC2S_NONE; + + // fast clock + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; // timer disable + AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV3_CLOCK | // MCK(48MHz)/32 -- tick=1.5mks + AT91C_TC_WAVE | AT91C_TC_WAVESEL_UP_AUTO | AT91C_TC_ACPA_CLEAR | + AT91C_TC_ACPC_SET | AT91C_TC_ASWTRG_SET; + AT91C_BASE_TC0->TC_RA = 1; + AT91C_BASE_TC0->TC_RC = 0xBFFF + 1; // 0xC000 + */ // At TIMER_CLOCK3 (MCK/32) @@ -64,13 +74,13 @@ static void setup_timer(void) { //#define RWD_TIME_PAUSE 30 /* 20us */ // testing calculating in ticks instead of (us) microseconds. -#define RWD_TIME_1 120 // READER_TIME_PAUSE off, 80us on = 100us 80 * 1.5 == 120ticks -#define RWD_TIME_0 60 // READER_TIME_PAUSE off, 40us on = 60us 40 * 1.5 == 60ticks +#define RWD_TIME_1 120 // READER_TIME_PAUSE 20us off, 80us on = 100us 80 * 1.5 == 120ticks +#define RWD_TIME_0 60 // READER_TIME_PAUSE 20us off, 40us on = 60us 40 * 1.5 == 60ticks #define RWD_TIME_PAUSE 30 // 20us == 20 * 1.5 == 30ticks */ #define TAG_BIT_PERIOD 150 // 100us == 100 * 1.5 == 150ticks +#define TAG_FRAME_WAIT 495 // 330us from READER frame end to TAG frame start. 330 * 1.5 == 495 #define RWD_TIME_FUZZ 20 // rather generous 13us, since the peak detector + hysteresis fuzz quite a bit -#define TAG_TIME_WAIT 495 // 330us from READER frame end to TAG frame start. 330 * 1.5 == 495 #define SIM_DIVISOR 586 /* prng_time/SIM_DIVISOR count prng needs to be forwared */ #define SIM_SHIFT 900 /* prng_time+SIM_SHIFT shift of delayed start */ @@ -90,16 +100,21 @@ static void setup_timer(void) { uint32_t stop_send_frame_us = 0; -// ~ 258us + 100us*delay -#define WAIT(delay) SpinDelayCountUs((delay)); -#define COIL_PULSE(x) { \ +// Pause pulse, off in 20us / 30ticks, +// ONE / ZERO bit pulse, +// one == 80us / 120ticks +// zero == 40us / 60ticks +#ifndef COIL_PULSE +# define COIL_PULSE(x) { \ SHORT_COIL; \ Wait(RWD_TIME_PAUSE); \ OPEN_COIL; \ - Wait(x); \ + Wait((x)); \ } -#define GET_COUNT_US GetCountUS() - +#endif +#ifndef GET_TICKS +# define GET_TICKS AT91C_BASE_TC0->TC_CV +#endif // ToDo: define a meaningful maximum size for auth_table. The bigger this is, the lower will be the available memory for traces. // Historically it used to be FREE_BUFFER_SIZE, which was 2744. @@ -108,8 +123,8 @@ static uint8_t* cardmem; static void Wait(uint32_t time){ if ( time == 0 ) return; - time += AT91C_BASE_TC0->TC_CV; - while(AT91C_BASE_TC0->TC_CV < time); + time += GET_TICKS; + while (GET_TICKS < time); } // Starts Clock and waits until its reset static void Reset(AT91PS_TC clock){ @@ -202,12 +217,12 @@ static void frame_send_tag(uint16_t response, uint8_t bits, uint8_t crypt) { /* Use time to crypt frame */ if(crypt) { - legic_prng_forward(2); /* TAG_TIME_WAIT -> shift by 2 */ + legic_prng_forward(2); /* TAG_FRAME_WAIT -> shift by 2 */ response ^= legic_prng_get_bits(bits); } /* Wait for the frame start */ - WAIT( TAG_TIME_WAIT ) + Wait( TAG_FRAME_WAIT ); uint8_t bit = 0; for(int i = 0; i < bits; i++) { @@ -220,7 +235,7 @@ static void frame_send_tag(uint16_t response, uint8_t bits, uint8_t crypt) { else LOW(GPIO_SSC_DOUT); - WAIT(100) + Wait(100); } LOW(GPIO_SSC_DOUT); } @@ -230,14 +245,12 @@ static void frame_send_tag(uint16_t response, uint8_t bits, uint8_t crypt) { */ static void frame_sendAsReader(uint32_t data, uint8_t bits){ - uint32_t starttime = AT91C_BASE_TC0->TC_CV; - uint32_t send = data; - uint8_t prng1 = legic_prng_count() ; + uint32_t starttime = GET_TICKS, send = 0; uint16_t mask = 1; - uint16_t lfsr = legic_prng_get_bits(bits); - - // xor the lsfr onto data. - send ^= lfsr; + uint8_t prng1 = legic_prng_count() ; + + // xor lsfr onto data. + send = data ^ legic_prng_get_bits(bits); for (; mask < BITMASK(bits); mask <<= 1) { if (send & mask) { @@ -248,19 +261,13 @@ static void frame_sendAsReader(uint32_t data, uint8_t bits){ } // Final pause to mark the end of the frame - // tempo = AT91C_BASE_TC0->TC_CV + RWD_TIME_PAUSE; - // SHORT_COIL; - // while(AT91C_BASE_TC0->TC_CV < tempo); - // OPEN_COIL; COIL_PULSE(0); - stop_send_frame_us = AT91C_BASE_TC0->TC_CV; + stop_send_frame_us = GET_TICKS; uint8_t cmdbytes[] = { - data & 0xFF, - (data >> 8) & 0xFF, + BYTEx(data, 0), + BYTEx(data, 1), bits, - lfsr & 0xFF, - (lfsr >> 8) & 0xFF, prng1, legic_prng_count() }; @@ -288,10 +295,8 @@ static void frame_sendAsReader(uint32_t data, uint8_t bits){ * the range is severely reduced (and you'll probably also need a good antenna). * So this should be fixed some time in the future for a proper receiver. */ -static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits, uint8_t crypt) { +static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits) { - uint32_t starttime = AT91C_BASE_TC0->TC_CV; - frame_clean(f); uint8_t i = 0, edges = 0; @@ -306,25 +311,24 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits, ui // calibrate the prng. legic_prng_forward(2); - //CalibratePrng( starttime ); // precompute the cipher uint8_t prng_before = legic_prng_count() ; - if(crypt) - lsfr = legic_prng_get_bits(bits); + lsfr = legic_prng_get_bits(bits); data = lsfr; //FIXED time between sending frame and now listening frame. 330us - uint32_t icetime = TAG_TIME_WAIT - ( AT91C_BASE_TC0->TC_CV - stop_send_frame_us ); - while ( AT91C_BASE_TC0->TC_CV != icetime ); - - next_bit_at = AT91C_BASE_TC0->TC_CV + TAG_BIT_PERIOD; + Wait( TAG_FRAME_WAIT ); + + uint32_t starttime = GET_TICKS; + + next_bit_at = GET_TICKS + TAG_BIT_PERIOD; for( i = 0; i < bits; i++) { edges = 0; - while ( AT91C_BASE_TC0->TC_CV < next_bit_at) { + while ( GET_TICKS < next_bit_at) { level = (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN); @@ -336,9 +340,9 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits, ui next_bit_at += TAG_BIT_PERIOD; // We expect 42 edges == ONE - if(edges > 20 && edges < 60) + if(edges > 20 && edges < 60) { data ^= the_bit; - + } the_bit <<= 1; } @@ -347,21 +351,18 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits, ui f->bits = bits; // log - stop_send_frame_us = AT91C_BASE_TC0->TC_CV; + stop_send_frame_us = GET_TICKS; uint8_t cmdbytes[] = { - (data & 0xFF), - (data >> 8) & 0xFF, + BYTEx(data,0), + BYTEx(data,1), bits, - (lsfr & 0xFF), - (lsfr >> 8) & 0xFF, + BYTEx(lsfr,0), + BYTEx(lsfr,1), prng_before, - legic_prng_count(), - icetime & 0xff, - (icetime >> 8) & 0xFF + legic_prng_count() }; LogTrace(cmdbytes, sizeof(cmdbytes), starttime, stop_send_frame_us, NULL, FALSE); - } // Setup pm3 as a Legic Reader @@ -369,7 +370,7 @@ static uint32_t perform_setup_phase_rwd(uint8_t iv) { // Switch on carrier and let the tag charge for 1ms HIGH(GPIO_SSC_DOUT); - SpinDelay(20); + SpinDelay(40); ResetUSClock(); @@ -382,10 +383,11 @@ static uint32_t perform_setup_phase_rwd(uint8_t iv) { // Now both tag and reader has same IV. Prng can start. legic_prng_init(iv); - frame_receiveAsReader(¤t_frame, 6, 1); + frame_receiveAsReader(¤t_frame, 6); // fixed delay before sending ack. - WAIT(TAG_BIT_PERIOD); + Wait(TAG_FRAME_WAIT); + legic_prng_forward(4); // Send obsfuscated acknowledgment frame. // 0x19 = 0x18 MIM22, 0x01 LSB READCMD @@ -402,8 +404,6 @@ static uint32_t perform_setup_phase_rwd(uint8_t iv) { break; } return current_frame.data; - - // End of Setup Phase. } static void LegicCommonInit(void) { @@ -423,29 +423,24 @@ static void LegicCommonInit(void) { clear_trace(); set_tracing(TRUE); - crc_init(&legic_crc, 4, 0x19 >> 1, 0x5, 0); StartCountUS(); } -/* Switch off carrier, make sure tag is reset */ +// Switch off carrier, make sure tag is reset static void switch_off_tag_rwd(void) { LOW(GPIO_SSC_DOUT); SpinDelay(10); WDT_HIT(); - set_tracing(FALSE); } // calculate crc4 for a legic READ command // 5,8,10 address size. -static uint32_t LegicCRC(uint16_t byte_index, uint8_t value, uint8_t cmd_sz) { +static uint32_t legic4Crc(uint8_t legicCmd, uint16_t byte_index, uint8_t value, uint8_t cmd_sz) { crc_clear(&legic_crc); - uint32_t temp = (value << cmd_sz) | (byte_index << 1) | LEGIC_READ; + uint32_t temp = (value << cmd_sz) | (byte_index << 1) | legicCmd; crc_update(&legic_crc, temp, cmd_sz + 8 ); - // crc_update(&legic_crc, LEGIC_READ, 1); - // crc_update(&legic_crc, byte_index, cmd_sz-1); - // crc_update(&legic_crc, value, 8); return crc_finish(&legic_crc); } @@ -455,23 +450,20 @@ int legic_read_byte(int byte_index, int cmd_sz) { uint32_t calcCrc = 0; uint32_t cmd = (byte_index << 1) | LEGIC_READ; - legic_prng_forward(3); - WAIT(TAG_TIME_WAIT) + Wait(TAG_FRAME_WAIT); frame_sendAsReader(cmd, cmd_sz); + frame_receiveAsReader(¤t_frame, 12); - frame_receiveAsReader(¤t_frame, 12, 1); - - byte = current_frame.data & 0xFF; - - calcCrc = LegicCRC(byte_index, byte, cmd_sz); - crc = (current_frame.data >> 8); + byte = BYTEx(current_frame.data, 0); + calcCrc = legic4Crc(LEGIC_READ, byte_index, byte, cmd_sz); + crc = BYTEx(current_frame.data, 1); if( calcCrc != crc ) { Dbprintf("!!! crc mismatch: expected %x but got %x !!!", calcCrc, crc); return -1; } - + legic_prng_forward(4); return byte; } @@ -481,10 +473,10 @@ int legic_read_byte(int byte_index, int cmd_sz) { * - forward the prng based on the timing */ //int legic_write_byte(int byte, int addr, int addr_sz, int PrngCorrection) { -int legic_write_byte(int byte, int addr, int addr_sz) { +int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) { //do not write UID, CRC at offset 0-4. - if(addr <= 0x04) return 0; + if (addr <= 4) return 0; // crc crc_clear(&legic_crc); @@ -493,37 +485,42 @@ int legic_write_byte(int byte, int addr, int addr_sz) { crc_update(&legic_crc, byte, 8); uint32_t crc = crc_finish(&legic_crc); + uint32_t crc2 = legic4Crc(LEGIC_WRITE, addr, byte, addr_sz+1); + if ( crc != crc2 ) + Dbprintf("crc is missmatch"); + // send write command uint32_t cmd = ((crc <<(addr_sz+1+8)) //CRC |(byte <<(addr_sz+1)) //Data |(addr <<1) //Address - |(0x00 <<0)); //CMD = W + | LEGIC_WRITE); //CMD = Write + uint32_t cmd_sz = addr_sz+1+8+4; //crc+data+cmd legic_prng_forward(2); /* we wait anyways */ - while(timer->TC_CV < 387) ; /* ~ 258us */ + Wait(TAG_FRAME_WAIT); frame_sendAsReader(cmd, cmd_sz); -// wllm-rbnt doesnt have these -// AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN; -// AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN; + // wllm-rbnt doesnt have these + AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN; + AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN; // wait for ack int t, old_level = 0, edges = 0; int next_bit_at = 0; - while(timer->TC_CV < 387) ; /* ~ 258us */ + Wait(TAG_FRAME_WAIT); - for( t = 0; t < 80; t++) { + for( t = 0; t < 80; ++t) { edges = 0; next_bit_at += TAG_BIT_PERIOD; while(timer->TC_CV < next_bit_at) { int level = (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN); - if(level != old_level) { + if(level != old_level) edges++; - } + old_level = level; } if(edges > 20 && edges < 60) { /* expected are 42 edges */ @@ -542,21 +539,12 @@ int legic_write_byte(int byte, int addr, int addr_sz) { int LegicRfReader(int offset, int bytes, int iv) { - int byte_index = 0, cmd_sz = 0, card_sz = 0; - - if ( MF_DBGLEVEL >= 2) { - Dbprintf("setting up legic card, IV = %x", iv); - Dbprintf("ONE %d ZERO %d PAUSE %d", RWD_TIME_1 , RWD_TIME_0 , RWD_TIME_PAUSE); - Dbprintf("TAG BIT PERIOD %d FUZZ %d TAG WAIT TIME %d", TAG_BIT_PERIOD, RWD_TIME_FUZZ, TAG_TIME_WAIT); - - // StartCountUS(); - // for ( uint8_t i =0; i<255; ++i){ - // uint32_t t1 = GET_COUNT_US; - // WAIT(i) - // t1 = GET_COUNT_US - t1; - // Dbprintf("WAIT(%d) == %u | %u | diff %d", i, t1-i ); - // } - } + uint16_t byte_index = 0; + uint8_t cmd_sz = 0; + int card_sz = 0; + + if ( MF_DBGLEVEL >= 2) + Dbprintf("setting up legic card, IV = 0x%03.3x", iv); LegicCommonInit(); @@ -567,28 +555,28 @@ int LegicRfReader(int offset, int bytes, int iv) { switch(tag_type) { case 0x0d: - if ( MF_DBGLEVEL >= 2) DbpString("MIM22 card found, reading card ..."); + if ( MF_DBGLEVEL >= 2) DbpString("MIM22 card found, reading card"); cmd_sz = 6; card_sz = 22; break; case 0x1d: - if ( MF_DBGLEVEL >= 2) DbpString("MIM256 card found, reading card ..."); + if ( MF_DBGLEVEL >= 2) DbpString("MIM256 card found, reading card"); cmd_sz = 9; card_sz = 256; break; case 0x3d: - if ( MF_DBGLEVEL >= 2) DbpString("MIM1024 card found, reading card ..."); + if ( MF_DBGLEVEL >= 2) DbpString("MIM1024 card found, reading card"); cmd_sz = 11; card_sz = 1024; break; default: - if ( MF_DBGLEVEL >= 1) Dbprintf("Unknown card format: %x",tag_type); + if ( MF_DBGLEVEL >= 1) Dbprintf("Unknown card format: %x", tag_type); return 1; } - if(bytes == -1) + if (bytes == -1) bytes = card_sz; - if(bytes+offset >= card_sz) + if (bytes + offset >= card_sz) bytes = card_sz - offset; // Start setup and read bytes. @@ -596,7 +584,7 @@ int LegicRfReader(int offset, int bytes, int iv) { LED_B_ON(); while (byte_index < bytes) { - int r = legic_read_byte(byte_index+offset, cmd_sz); + int r = legic_read_byte(byte_index + offset, cmd_sz); if (r == -1 || BUTTON_PRESS()) { switch_off_tag_rwd(); @@ -605,9 +593,9 @@ int LegicRfReader(int offset, int bytes, int iv) { cmd_send(CMD_ACK,0,0,0,0,0); return 1; } - cardmem[byte_index] = r; + cardmem[++byte_index] = r; + //byte_index++; WDT_HIT(); - byte_index++; } switch_off_tag_rwd(); @@ -673,27 +661,27 @@ void LegicRfWriter(int offset, int bytes, int iv) { switch(tag_type) { case 0x0d: if(offset+bytes > 22) { - Dbprintf("Error: can not write to 0x%03.3x on MIM22", offset+bytes); + Dbprintf("Error: can not write to 0x%03.3x on MIM22", offset + bytes); return; } addr_sz = 5; - if ( MF_DBGLEVEL >= 2) Dbprintf("MIM22 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset+bytes); + if ( MF_DBGLEVEL >= 2) Dbprintf("MIM22 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset + bytes); break; case 0x1d: if(offset+bytes > 0x100) { - Dbprintf("Error: can not write to 0x%03.3x on MIM256", offset+bytes); + Dbprintf("Error: can not write to 0x%03.3x on MIM256", offset + bytes); return; } addr_sz = 8; - if ( MF_DBGLEVEL >= 2) Dbprintf("MIM256 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset+bytes); + if ( MF_DBGLEVEL >= 2) Dbprintf("MIM256 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset + bytes); break; case 0x3d: if(offset+bytes > 0x400) { - Dbprintf("Error: can not write to 0x%03.3x on MIM1024", offset+bytes); + Dbprintf("Error: can not write to 0x%03.3x on MIM1024", offset + bytes); return; } addr_sz = 10; - if ( MF_DBGLEVEL >= 2) Dbprintf("MIM1024 card found, writing 0x%03.3x - 0x%03.3x ...", offset, offset+bytes); + if ( MF_DBGLEVEL >= 2) Dbprintf("MIM1024 card found, writing 0x%03.3x - 0x%03.3x ...", offset, offset + bytes); break; default: Dbprintf("No or unknown card found, aborting"); @@ -702,8 +690,8 @@ void LegicRfWriter(int offset, int bytes, int iv) { LED_B_ON(); perform_setup_phase_rwd(iv); + int r = 0; while(byte_index < bytes) { - int r; //check if the DCF should be changed if ( ((byte_index+offset) == 0x05) && (bytes >= 0x02) ) { @@ -720,7 +708,7 @@ void LegicRfWriter(int offset, int bytes, int iv) { r = legic_write_byte(cardmem[byte_index+offset], byte_index+offset, addr_sz); } - if((r != 0) || BUTTON_PRESS()) { + if ((r != 0) || BUTTON_PRESS()) { Dbprintf("operation aborted @ 0x%03.3x", byte_index); switch_off_tag_rwd(); LEDsoff(); @@ -780,8 +768,7 @@ void LegicRfRawWriter(int address, int byte, int iv) { LED_B_ON(); perform_setup_phase_rwd(iv); - //legic_prng_forward(2); - + int r = legic_write_byte(byte, address, addr_sz); if((r != 0) || BUTTON_PRESS()) { @@ -817,11 +804,9 @@ static void frame_handle_tag(struct legic_frame const * const f) legic_prng_bc = 0; legic_prng_iv = f->data; - /* TIMEOUT */ + ResetClock(); - - //while(timer->TC_CV < 280); - WAIT(280) + Wait(280); return; } @@ -832,14 +817,11 @@ static void frame_handle_tag(struct legic_frame const * const f) if((f->bits == 6) && (f->data == xored)) { legic_state = STATE_CON; - /* TIMEOUT */ ResetClock(); - - //while(timer->TC_CV < 200); - WAIT(200) - + Wait(200); return; - } else { + + } else { legic_state = STATE_DISCON; LED_C_OFF(); Dbprintf("iv: %02x frame: %02x key: %02x xored: %02x", legic_prng_iv, f->data, local_key, xored); @@ -853,7 +835,7 @@ static void frame_handle_tag(struct legic_frame const * const f) int key = get_key_stream(2, 11); //legic_phase_drift, 11); int addr = f->data ^ key; addr = addr >> 1; int data = BigBuf[addr]; - int hash = LegicCRC(addr, data, 11) << 8; + int hash = legic4Crc(LEGIC_READ, addr, data, 11) << 8; BigBuf[OFFSET_LOG+legic_read_count] = (uint8_t)addr; legic_read_count++; @@ -862,13 +844,9 @@ static void frame_handle_tag(struct legic_frame const * const f) frame_send_tag(hash | data, 12, 1); - /* TIMEOUT */ ResetClock(); - legic_prng_forward(2); - //while(timer->TC_CV < 180); - WAIT(180) - + Wait(180); return; } } diff --git a/armsrc/util.c b/armsrc/util.c index 09926747..be6170d3 100644 --- a/armsrc/util.c +++ b/armsrc/util.c @@ -351,8 +351,7 @@ void StartCountUS() { uint32_t RAMFUNC GetCountUS(){ //return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV / 15) * 10); // By suggestion from PwPiwi, http://www.proxmark.org/forum/viewtopic.php?pid=17548#p17548 - //return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV * 2) / 3); - return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV << 1) / 3); + return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV * 2) / 3); } void ResetUSClock(void) { //enable clock of timer and software trigger @@ -363,12 +362,9 @@ void ResetUSClock(void) { // attempt at high resolution microsecond timer // beware: timer counts in 21.3uS increments (1024/48Mhz) void SpinDelayCountUs(uint32_t us) { - - us += GetCountUS(); - us -= 6; - - for(;;) - if ( GetCountUS() >= us ) return; + if (us < 8) return; + us += GetCountUS(); + while ( GetCountUS() < us ){} } // static uint32_t GlobalUsCounter = 0; diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c index c9b10eaf..31d59005 100644 --- a/client/cmdhflegic.c +++ b/client/cmdhflegic.c @@ -415,22 +415,18 @@ int CmdLegicRFRead(const char *Cmd) { clearCommandBuffer(); SendCommand(&c); UsbCommand resp; - if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) { + if (WaitForResponseTimeout(CMD_ACK, &resp, 2000)) { uint8_t isOK = resp.arg[0] & 0xFF; uint16_t len = resp.arg[1] & 0x3FF; if ( isOK ) { - PrintAndLog("OK : %d", isOK); PrintAndLog("use 'hf legic decode' or"); PrintAndLog("'data hexsamples %d' to view results", len); + } } else { PrintAndLog("command execution time out"); return 1; } - - //uint8_t got[12000]; - //GetFromBigBuf(got,sizeof(got),0); - //WaitForResponse(CMD_ACK,NULL); return 0; } -- 2.39.5