X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/9ab7a6c75566a2d06e56a8a97173c6382a3c5b3d..b61f426c2d92962ae51a6d4dc01a846fc2d4c095:/armsrc/util.c diff --git a/armsrc/util.c b/armsrc/util.c index 7a2895cf..dc18e5e3 100644 --- a/armsrc/util.c +++ b/armsrc/util.c @@ -1,10 +1,30 @@ //----------------------------------------------------------------------------- -// Utility functions used in many places, not specific to any piece of code. // Jonathan Westhues, Sept 2005 +// +// This code is licensed to you under the terms of the GNU GPL, version 2 or, +// at your option, any later version. See the LICENSE.txt file for the text of +// the license. +//----------------------------------------------------------------------------- +// Utility functions used in many places, not specific to any piece of code. //----------------------------------------------------------------------------- + #include "proxmark3.h" #include "util.h" #include "string.h" +#include "apps.h" + +size_t nbytes(size_t nbits) { + return (nbits/8)+((nbits%8)>0); +} + +uint32_t SwapBits(uint32_t value, int nrbits) { + int i; + uint32_t newvalue = 0; + for(i = 0; i < nrbits; i++) { + newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i); + } + return newvalue; +} void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) { @@ -229,3 +249,134 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers strncat(dst, " ", len); strncat(dst, v->buildtime, len); } + +// ------------------------------------------------------------------------- +// timer lib +// ------------------------------------------------------------------------- +// test procedure: +// +// ti = GetTickCount(); +// SpinDelay(1000); +// ti = GetTickCount() - ti; +// Dbprintf("timer(1s): %d t=%d", ti, GetTickCount()); + +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 +} + +/* +* Get the current count. +*/ +uint32_t RAMFUNC GetTickCount(){ + return AT91C_BASE_RTTC->RTTC_RTVR;// was * 2; +} + +// ------------------------------------------------------------------------- +// microseconds timer +// ------------------------------------------------------------------------- +void StartCountUS() +{ + AT91C_BASE_PMC->PMC_PCER |= (0x1 << 12) | (0x1 << 13) | (0x1 << 14); +// AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC1XC1S_TIOA0; + 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 + + AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS; // timer disable + AT91C_BASE_TC1->TC_CMR = AT91C_TC_CLKS_XC1; // from timer 0 + + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN; + AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN; + AT91C_BASE_TCB->TCB_BCR = 1; + } + +uint32_t RAMFUNC GetCountUS(){ + return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV / 15) * 10); +} + +static uint32_t GlobalUsCounter = 0; + +uint32_t RAMFUNC GetDeltaCountUS(){ + uint32_t g_cnt = GetCountUS(); + uint32_t g_res = g_cnt - GlobalUsCounter; + GlobalUsCounter = g_cnt; + return g_res; +} + + +// ------------------------------------------------------------------------- +// Mifare timer. Uses ssp_clk from FPGA +// ------------------------------------------------------------------------- +void StartCountMifare() +{ + AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_TC0) | (1 << AT91C_ID_TC1) | (1 << AT91C_ID_TC2); // Enable Clock to all timers + AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_TIOA1 // XC0 Clock = TIOA1 + | AT91C_TCB_TC1XC1S_NONE // XC1 Clock = none + | AT91C_TCB_TC2XC2S_TIOA0; // XC2 Clock = TIOA0 + + // configure TC1 to create a short pulse on TIOA1 when a rising edge on TIOB1 (= ssp_clk from FPGA) occurs: + AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS; // disable TC1 + AT91C_BASE_TC1->TC_CMR = AT91C_TC_CLKS_TIMER_DIV1_CLOCK // TC1 Clock = MCK(48MHz)/2 = 24MHz + | AT91C_TC_CPCSTOP // Stop clock on RC compare + | AT91C_TC_EEVTEDG_RISING // Trigger on rising edge of Event + | AT91C_TC_EEVT_TIOB // Event-Source: TIOB1 (= ssc_clk from FPGA = 13,56MHz / 16) + | AT91C_TC_ENETRG // Enable external trigger event + | AT91C_TC_WAVESEL_UP // Upmode without automatic trigger on RC compare + | AT91C_TC_WAVE // Waveform Mode + | AT91C_TC_AEEVT_SET // Set TIOA1 on external event + | AT91C_TC_ACPC_CLEAR; // Clear TIOA1 on RC Compare + AT91C_BASE_TC1->TC_RC = 0x04; // RC Compare value = 0x04 + + // use TC0 to count TIOA1 pulses + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; // disable TC0 + AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_XC0 // TC0 clock = XC0 clock = TIOA1 + | AT91C_TC_WAVE // Waveform Mode + | AT91C_TC_WAVESEL_UP // just count + | AT91C_TC_ACPA_CLEAR // Clear TIOA0 on RA Compare + | AT91C_TC_ACPC_SET; // Set TIOA0 on RC Compare + AT91C_BASE_TC0->TC_RA = 1; // RA Compare value = 1; pulse width to TC2 + AT91C_BASE_TC0->TC_RC = 0; // RC Compare value = 0; increment TC2 on overflow + + // use TC2 to count TIOA0 pulses (giving us a 32bit counter (TC0/TC2) clocked by ssp_clk) + AT91C_BASE_TC2->TC_CCR = AT91C_TC_CLKDIS; // disable TC2 + AT91C_BASE_TC2->TC_CMR = AT91C_TC_CLKS_XC2 // TC2 clock = XC2 clock = TIOA0 + | AT91C_TC_WAVE // Waveform Mode + | AT91C_TC_WAVESEL_UP; // just count + + + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN; // enable TC0 + AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN; // enable TC1 + AT91C_BASE_TC2->TC_CCR = AT91C_TC_CLKEN; // enable TC2 + + // activate the ISO14443 part of the FPGA. We need the clock and frame signals. + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); + + // synchronize the counter with the ssp_frame signal. + while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_FRAME); // wait for ssp_frame to be low + while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_FRAME)); // sync on rising edge of ssp_frame (= start of transfer) + + AT91C_BASE_TCB->TCB_BCR = 1; // assert Sync (set all timers to 0 on next active clock edge) +} + + +uint32_t RAMFUNC GetCountMifare(){ + uint32_t tmp_count; + tmp_count = (AT91C_BASE_TC2->TC_CV << 16) | AT91C_BASE_TC0->TC_CV; + if ((tmp_count & 0xffff) == 0) { //small chance that we may have missed an increment in TC2 + return (AT91C_BASE_TC2->TC_CV << 16); + } + else { + return tmp_count; + } +}