X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e55b441992629938fecd75693d204dd98831d3ba..refs/pull/938/head:/armsrc/util.c diff --git a/armsrc/util.c b/armsrc/util.c index 4bff3a26..b0cd1818 100644 --- a/armsrc/util.c +++ b/armsrc/util.c @@ -137,8 +137,7 @@ void LED(int led, int ms) // not clicked, or held down (for ms || 1sec) // In general, don't use this function unless you expect a // double click, otherwise it will waste 500ms -- use BUTTON_HELD instead -int BUTTON_CLICKED(int ms) -{ +int BUTTON_CLICKED(int ms) { // Up to 500ms in between clicks to mean a double click int ticks = (48000 * (ms ? ms : 1000)) >> 10; @@ -200,8 +199,7 @@ int BUTTON_CLICKED(int ms) } // Determine if a button is held down -int BUTTON_HELD(int ms) -{ +int BUTTON_HELD(int ms) { // If button is held for one second int ticks = (48000 * (ms ? ms : 1000)) >> 10; @@ -218,8 +216,7 @@ int BUTTON_HELD(int ms) uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR; - for(;;) - { + for(;;) { uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR; // As soon as our button let go, we didn't hold long enough @@ -227,8 +224,7 @@ int BUTTON_HELD(int ms) return BUTTON_SINGLE_CLICK; // Have we waited the full second? - else - if (now == (uint16_t)(start + ticks)) + else if (now == (uint16_t)(start + ticks)) return BUTTON_HOLD; WDT_HIT(); @@ -240,8 +236,7 @@ int BUTTON_HELD(int ms) // attempt at high resolution microsecond timer // beware: timer counts in 21.3uS increments (1024/48Mhz) -void SpinDelayUs(int us) -{ +void SpinDelayUs(int us) { int ticks = (48*us) >> 10; // Borrow a PWM unit for my real-time clock @@ -262,8 +257,7 @@ void SpinDelayUs(int us) } } -void SpinDelay(int ms) -{ +void SpinDelay(int ms) { // convert to uS and call microsecond delay function SpinDelayUs(ms*1000); } @@ -314,8 +308,7 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers // ti = GetTickCount() - ti; // Dbprintf("timer(1s): %d t=%d", ti, GetTickCount()); -void StartTickCount() -{ +void StartTickCount() { // 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 @@ -328,7 +321,7 @@ void StartTickCount() /* * Get the current count. */ -uint32_t RAMFUNC GetTickCount(){ +uint32_t RAMFUNC GetTickCount(void) { return AT91C_BASE_RTTC->RTTC_RTVR;// was * 2; } @@ -336,8 +329,7 @@ uint32_t RAMFUNC GetTickCount(){ // ------------------------------------------------------------------------- // microseconds timer // ------------------------------------------------------------------------- -void StartCountUS() -{ +void StartCountUS(void) { 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; @@ -359,14 +351,14 @@ void StartCountUS() } -uint32_t RAMFUNC GetCountUS(){ +uint32_t RAMFUNC GetCountUS(void) { 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(){ +uint32_t RAMFUNC GetDeltaCountUS(void) { uint32_t g_cnt = GetCountUS(); uint32_t g_res = g_cnt - GlobalUsCounter; GlobalUsCounter = g_cnt; @@ -377,8 +369,7 @@ uint32_t RAMFUNC GetDeltaCountUS(){ // ------------------------------------------------------------------------- // Timer for iso14443 commands. Uses ssp_clk from FPGA // ------------------------------------------------------------------------- -void StartCountSspClk() -{ +void StartCountSspClk(void) { 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 @@ -395,7 +386,7 @@ void StartCountSspClk() | 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 = 0x02; // RC Compare value = 0x02 + AT91C_BASE_TC1->TC_RC = 1; // RC Compare value = 1; pulse width to TC0 // use TC0 to count TIOA1 pulses AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; // disable TC0 @@ -425,7 +416,7 @@ void StartCountSspClk() while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)); // wait for ssp_clk to go high; 1st ssp_clk after start of frame while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK); // wait for ssp_clk to go low; while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)); // wait for ssp_clk to go high; 2nd ssp_clk after start of frame - if ((AT91C_BASE_SSC->SSC_RFMR & SSC_FRAME_MODE_BITS_IN_WORD(32)) == SSC_FRAME_MODE_BITS_IN_WORD(16)) { + if ((AT91C_BASE_SSC->SSC_RFMR & SSC_FRAME_MODE_BITS_IN_WORD(32)) == SSC_FRAME_MODE_BITS_IN_WORD(16)) { // 16bit frame while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK); // wait for ssp_clk to go low; while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)); // wait for ssp_clk to go high; 3rd ssp_clk after start of frame while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK); // wait for ssp_clk to go low; @@ -439,8 +430,8 @@ void StartCountSspClk() AT91C_BASE_TCB->TCB_BCR = 1; // assert Sync (set all timers to 0 on next active clock edge) // at the next (3rd/7th) ssp_clk rising edge, TC1 will be reset (and not generate a clock signal to TC0) // at the next (4th/8th) ssp_clk rising edge, TC0 (the low word of our counter) will be reset. From now on, - // whenever the last three bits of our counter go 0, we can be sure to be in the middle of a frame transfer. - // (just started with the transfer of the 3rd Bit). + // whenever the last three/four bits of our counter go 0, we can be sure to be in the middle of a frame transfer. + // 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 < 0xFFFF);