CHG: code clean up

[proxmark3-svn] / armsrc / ticks.c

diff --git a/armsrc/ticks.c b/armsrc/ticks.c
index 6f34fe14f67fb35249fafa376ee40166f082ef65..633e963a6b8e555b0332285051147d92f175d26d 100644 (file)
--- a/armsrc/ticks.c
+++ b/armsrc/ticks.c
@@ -8,7 +8,6 @@
 //-----------------------------------------------------------------------------
 // Timers, Clocks functions used in LF or Legic where you would need detailed time.
 //-----------------------------------------------------------------------------
-
 #include "ticks.h"
 
 // attempt at high resolution microsecond timer
@@ -179,14 +178,26 @@ uint32_t RAMFUNC GetCountSspClk(void) {
 //  -------------------------------------------------------------------------
 void StartTicks(void){
        //initialization of the timer
+       // tc1 is higher 0xFFFF0000
+       // tc0 is lower 0x0000FFFF
        AT91C_BASE_PMC->PMC_PCER |= (1 << 12) | (1 << 13) | (1 << 14);
        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 >= 1);
 }
 // Wait - Spindelay in ticks.
 // if called with a high number, this will trigger the WDT...
@@ -207,9 +218,11 @@ void WaitMS(uint16_t ms){
 }
 // Starts Clock and waits until its reset
 void ResetTicks(){
-       ResetTimer(AT91C_BASE_TC0);
+       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);
 }
 void ResetTimer(AT91PS_TC timer){
        timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
-       while(timer->TC_CV > 1) ;
+       while(timer->TC_CV >= 1) ;
 }