X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/355c8b4a7df083c13d82963fb9d14548647e91b1..refs/pull/504/head:/armsrc/util.c?ds=sidebyside diff --git a/armsrc/util.c b/armsrc/util.c index a4f55879..e25c6e0b 100644 --- a/armsrc/util.c +++ b/armsrc/util.c @@ -12,6 +12,7 @@ #include "util.h" #include "string.h" #include "apps.h" +#include "BigBuf.h" @@ -34,7 +35,7 @@ void print_result(char *name, uint8_t *buf, size_t len) { } size_t nbytes(size_t nbits) { - return (nbits/8)+((nbits%8)>0); + return (nbits >> 3)+((nbits % 8) > 0); } uint32_t SwapBits(uint32_t value, int nrbits) { @@ -267,15 +268,15 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers dst[0] = 0; strncat(dst, prefix, len-1); if(v->magic != VERSION_INFORMATION_MAGIC) { - strncat(dst, "Missing/Invalid version information", len - strlen(dst) - 1); + strncat(dst, "Missing/Invalid version information\n", len - strlen(dst) - 1); return; } if(v->versionversion != 1) { - strncat(dst, "Version information not understood", len - strlen(dst) - 1); + strncat(dst, "Version information not understood\n", len - strlen(dst) - 1); return; } if(!v->present) { - strncat(dst, "Version information not available", len - strlen(dst) - 1); + strncat(dst, "Version information not available\n", len - strlen(dst) - 1); return; } @@ -288,8 +289,10 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers strncat(dst, " ", len - strlen(dst) - 1); strncat(dst, v->buildtime, len - strlen(dst) - 1); + strncat(dst, "\n", len - strlen(dst) - 1); } + // ------------------------------------------------------------------------- // timer lib // ------------------------------------------------------------------------- @@ -302,13 +305,15 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers void StartTickCount() { -// must be 0x40, but on my cpu - included divider is optimal -// 0x20 - 1 ms / bit -// 0x40 - 2 ms / bit - - AT91C_BASE_RTTC->RTTC_RTMR = AT91C_RTTC_RTTRST + 0x001D; // was 0x003B + // This timer is based on the slow clock. The slow clock frequency is between 22kHz and 40kHz. + // We can determine the actual slow clock frequency by looking at the Main Clock Frequency Register. + uint16_t mainf = AT91C_BASE_PMC->PMC_MCFR & 0xffff; // = 16 * main clock frequency (16MHz) / slow clock frequency + // set RealTimeCounter divider to count at 1kHz: + AT91C_BASE_RTTC->RTTC_RTMR = AT91C_RTTC_RTTRST | ((256000 + (mainf/2)) / mainf); + // note: worst case precision is approx 2.5% } + /* * Get the current count. */ @@ -316,6 +321,7 @@ uint32_t RAMFUNC GetTickCount(){ return AT91C_BASE_RTTC->RTTC_RTVR;// was * 2; } + // ------------------------------------------------------------------------- // microseconds timer // ------------------------------------------------------------------------- @@ -341,10 +347,12 @@ void StartCountUS() AT91C_BASE_TCB->TCB_BCR = 1; } + uint32_t RAMFUNC GetCountUS(){ - return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV / 15) * 10); + return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV * 2) / 3); //was /15) * 10); } + static uint32_t GlobalUsCounter = 0; uint32_t RAMFUNC GetDeltaCountUS(){ @@ -399,7 +407,7 @@ void StartCountSspClk() AT91C_BASE_TC2->TC_CCR = AT91C_TC_CLKEN; // enable TC2 // - // synchronize the counter with the ssp_frame signal. Note: FPGA must be in any iso14446 mode, otherwise the frame signal would not be present + // synchronize the counter with the ssp_frame signal. Note: FPGA must be in any iso14443 mode, otherwise SSC_FRAME and SSC_CLK signals would not be present // while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_FRAME)); // wait for ssp_frame to go high (start of frame) while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_FRAME); // wait for ssp_frame to be low @@ -413,7 +421,17 @@ void StartCountSspClk() // (just started with the transfer of the 4th Bit). // The high word of the counter (TC2) will not reset until the low word (TC0) overflows. Therefore need to wait quite some time before // we can use the counter. - while (AT91C_BASE_TC0->TC_CV < 0xFFF0); + while (AT91C_BASE_TC0->TC_CV < 0xFFFF); + // Note: needs one more SSP_CLK cycle (1.18 us) until TC2 resets. Don't call GetCountSspClk() that soon. +} + + +void ResetSspClk(void) { + //enable clock of timer and software trigger + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + AT91C_BASE_TC2->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + while (AT91C_BASE_TC2->TC_CV > 0); } @@ -427,81 +445,93 @@ uint32_t RAMFUNC GetCountSspClk(){ return tmp_count; } } -void iso14a_clear_trace() { - clear_trace(); + + +// ------------------------------------------------------------------------- +// Timer for bitbanging, or LF stuff when you need a very precis timer +// 1us = 1.5ticks +// ------------------------------------------------------------------------- +void StartTicks(void){ + //initialization of the timer + // tc1 is higher 0xFFFF0000 + // tc0 is lower 0x0000FFFF + AT91C_BASE_PMC->PMC_PCER |= (1 << AT91C_ID_TC0) | (1 << AT91C_ID_TC1); + AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_TIOA0 | AT91C_TCB_TC2XC2S_NONE; + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; + AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV3_CLOCK | // MCK(48MHz) / 32 + 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 = 0; + + AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS; // timer disable + AT91C_BASE_TC1->TC_CMR = AT91C_TC_CLKS_XC1; // from TC0 + + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + AT91C_BASE_TCB->TCB_BCR = 1; + + // wait until timer becomes zero. + while (AT91C_BASE_TC1->TC_CV > 0); } -void iso14a_set_tracing(bool enable) { - set_tracing(enable); + +// Wait - Spindelay in ticks. +// if called with a high number, this will trigger the WDT... +void WaitTicks(uint32_t ticks){ + if ( ticks == 0 ) return; + ticks += GET_TICKS; + while (GET_TICKS < ticks); } -void clear_trace() { - memset(trace, 0x44, TRACE_SIZE); - traceLen = 0; + +// Wait / Spindelay in us (microseconds) +// 1us = 1.5ticks. +void WaitUS(uint16_t us){ + if ( us == 0 ) return; + WaitTicks( (uint32_t)(us * 1.5) ); } -void set_tracing(bool enable) { - tracing = enable; + +void WaitMS(uint16_t ms){ + if (ms == 0) return; + WaitTicks( (uint32_t)(ms * 1500) ); } -/** - This is a function to store traces. All protocols can use this generic tracer-function. - The traces produced by calling this function can be fetched on the client-side - by 'hf list raw', alternatively 'hf list <proto>' for protocol-specific - annotation of commands/responses. -**/ -bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag) -{ - if (!tracing) return FALSE; +// Starts Clock and waits until its reset +void ResetTicks(void){ + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + while (AT91C_BASE_TC1->TC_CV > 0); +} - uint16_t num_paritybytes = (iLen-1)/8 + 1; // number of valid paritybytes in *parity - uint16_t duration = timestamp_end - timestamp_start; - // Return when trace is full - if (traceLen + sizeof(iLen) + sizeof(timestamp_start) + sizeof(duration) + num_paritybytes + iLen >= TRACE_SIZE) { - tracing = FALSE; // don't trace any more - return FALSE; - } +void ResetTimer(AT91PS_TC timer){ + timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + while(timer->TC_CV > 0) ; +} - // Traceformat: - // 32 bits timestamp (little endian) - // 16 bits duration (little endian) - // 16 bits data length (little endian, Highest Bit used as readerToTag flag) - // y Bytes data - // x Bytes parity (one byte per 8 bytes data) - - // timestamp (start) - trace[traceLen++] = ((timestamp_start >> 0) & 0xff); - trace[traceLen++] = ((timestamp_start >> 8) & 0xff); - trace[traceLen++] = ((timestamp_start >> 16) & 0xff); - trace[traceLen++] = ((timestamp_start >> 24) & 0xff); - - // duration - trace[traceLen++] = ((duration >> 0) & 0xff); - trace[traceLen++] = ((duration >> 8) & 0xff); - - // data length - trace[traceLen++] = ((iLen >> 0) & 0xff); - trace[traceLen++] = ((iLen >> 8) & 0xff); - - // readerToTag flag - if (!readerToTag) { - trace[traceLen - 1] |= 0x80; - } - // data bytes - if (btBytes != NULL && iLen != 0) { - memcpy(trace + traceLen, btBytes, iLen); - } - traceLen += iLen; +// stop clock +void StopTicks(void){ + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; + AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS; +} - // parity bytes - if (parity != NULL && iLen != 0) { - memcpy(trace + traceLen, parity, num_paritybytes); + +static uint64_t next_random = 1; + +/* Generates a (non-cryptographically secure) 32-bit random number. + * + * We don't have an implementation of the "rand" function or a clock to seed it + * with, so we just call GetTickCount the first time to seed ourselves. + */ +uint32_t prand() { + if (next_random == 1) { + next_random = GetTickCount(); } - traceLen += num_paritybytes; - return TRUE; + next_random = next_random * 6364136223846793005 + 1; + return (uint32_t)(next_random >> 32) % 0xffffffff; } -