X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/d5bded10e28299e4a2b49aaae7d93457736c1263..57e1e31dce70a58da1736b9579a869c1df313a13:/armsrc/ticks.c

diff --git a/armsrc/ticks.c b/armsrc/ticks.c
index d183c707..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) {
@@ -68,7 +66,7 @@ uint32_t RAMFUNC GetTickCount(void){
 //  microseconds timer 
 //  -------------------------------------------------------------------------
 void StartCountUS(void) {
-	AT91C_BASE_PMC->PMC_PCER |= (1 << 12) | (1 << 13) | (1 << 14);
+	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
@@ -87,7 +85,7 @@ void StartCountUS(void) {
 	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(void){
@@ -96,12 +94,11 @@ uint32_t RAMFUNC GetCountUS(void){
 	return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV * 2) / 3); 
 }
 
-
 //  -------------------------------------------------------------------------
 //  Timer for iso14443 commands. Uses ssp_clk from FPGA 
 //  -------------------------------------------------------------------------
 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_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
@@ -155,16 +152,15 @@ void StartCountSspClk(void) {
 
 	// 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 >= 1);	
+	while (AT91C_BASE_TC2->TC_CV > 0);	
 }
-
 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
@@ -172,21 +168,32 @@ uint32_t RAMFUNC GetCountSspClk(void) {
 	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...
@@ -206,10 +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;	
 }