X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/24c49d36ba3ea8acb9be21bdbb51503969a5a113..e1778858ddc53a6a82e8ee24f02e6b673687f69a:/armsrc/ticks.c

diff --git a/armsrc/ticks.c b/armsrc/ticks.c
index 4aaa9c98..1533faeb 100644
--- a/armsrc/ticks.c
+++ b/armsrc/ticks.c
@@ -8,9 +8,7 @@
 //-----------------------------------------------------------------------------
 // Timers, Clocks functions used in LF or Legic where you would need detailed time.
 //-----------------------------------------------------------------------------
-
 #include "ticks.h"
-
 // attempt at high resolution microsecond timer
 // beware: timer counts in 21.3uS increments (1024/48Mhz)
 void SpinDelayUs(int us) {
@@ -48,7 +46,7 @@ void SpinDelay(int ms) {
 //	SpinDelay(1000);
 //	ti = GetTickCount() - ti;
 //	Dbprintf("timer(1s): %d t=%d", ti, GetTickCount());
-void StartTickCount() {
+void StartTickCount(void) {
 	// 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
@@ -60,15 +58,15 @@ void StartTickCount() {
 /*
 * Get the current count.
 */
-uint32_t RAMFUNC GetTickCount(){
+uint32_t RAMFUNC GetTickCount(void){
 	return AT91C_BASE_RTTC->RTTC_RTVR;// was * 2;
 }
 
 //  -------------------------------------------------------------------------
 //  microseconds timer 
 //  -------------------------------------------------------------------------
-void StartCountUS() {
-	AT91C_BASE_PMC->PMC_PCER |= (1 << 12) | (1 << 13) | (1 << 14);
+void StartCountUS(void) {
+	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;
 
 	// fast clock
@@ -87,26 +85,20 @@ void StartCountUS() {
 	AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
 	AT91C_BASE_TCB->TCB_BCR = 1;
 	
-	while (AT91C_BASE_TC1->TC_CV > 1);
+	while (AT91C_BASE_TC1->TC_CV > 0);
 }
 
-uint32_t RAMFUNC GetCountUS(){
+uint32_t RAMFUNC GetCountUS(void){
 	//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); 
 }
-void ResetUSClock(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;
-	while (AT91C_BASE_TC1->TC_CV > 1);
-}
 
 //  -------------------------------------------------------------------------
 //  Timer for iso14443 commands. Uses ssp_clk from FPGA 
 //  -------------------------------------------------------------------------
-void StartCountSspClk() {
-	AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_TC0) | (1 << AT91C_ID_TC1) | (1 << AT91C_ID_TC2);  // Enable Clock to all timers
+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
 							| AT91C_TCB_TC2XC2S_TIOA0;		// XC2 Clock = TIOA0
@@ -160,38 +152,48 @@ void StartCountSspClk() {
 
 	// 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_TC2->TC_CV > 1);
+	while (AT91C_BASE_TC2->TC_CV > 0);
 }
 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);	
 }
-
-uint32_t RAMFUNC GetCountSspClk(){
-
+uint32_t RAMFUNC GetCountSspClk(void) {
 	uint32_t tmp_count = (AT91C_BASE_TC2->TC_CV << 16) | AT91C_BASE_TC0->TC_CV;
 	if ((tmp_count & 0x0000ffff) == 0)  //small chance that we may have missed an increment in TC2
 		return (AT91C_BASE_TC2->TC_CV << 16);
 	return tmp_count;
 }
 
-
 //  -------------------------------------------------------------------------
 //  Timer for bitbanging,  or LF stuff when you need a very precis timer
 //  1us = 1.5ticks
 //  -------------------------------------------------------------------------
 void StartTicks(void){
 	//initialization of the timer
-	AT91C_BASE_PMC->PMC_PCER |= (1 << 12) | (1 << 13) | (1 << 14);
+	// 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;  //clock at 48/32 MHz
+	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_TC0->TC_CV > 1);
+	while (AT91C_BASE_TC1->TC_CV > 0);
 }
 // Wait - Spindelay in ticks.
 // if called with a high number, this will trigger the WDT...
@@ -211,10 +213,17 @@ void WaitMS(uint16_t ms){
 	WaitTicks( (uint32_t)(ms * 1500) );
 }
 // Starts Clock and waits until its reset
-void ResetTicks(){
-	ResetTimer(AT91C_BASE_TC0);
+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);
 }
 void ResetTimer(AT91PS_TC timer){
 	timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
-	while(timer->TC_CV > 1) ;
+	while(timer->TC_CV > 0) ;
+}
+// stop clock
+void StopTicks(void){
+	AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;
+	AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS;	
 }