LF sim

[proxmark3-svn] / armsrc / ticks.c

diff --git a/armsrc/ticks.c b/armsrc/ticks.c
index 555685cc2550d7318774cbc6bacfdd861154eab6..dcff99f4547543f2a1f45edefacce348b87190b4 100644 (file)
--- a/armsrc/ticks.c
+++ b/armsrc/ticks.c
@@ -9,7 +9,6 @@
 // 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) {
@@ -67,7 +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
@@ -95,12 +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
@@ -163,7 +161,6 @@ void ResetSspClk(void) {
        AT91C_BASE_TC2->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
        while (AT91C_BASE_TC2->TC_CV >= 1);     
 }
-
 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
@@ -171,21 +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 >= 1);
 }
 // Wait - Spindelay in ticks.
 // if called with a high number, this will trigger the WDT...
@@ -205,10 +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 >= 1);
 }
 void ResetTimer(AT91PS_TC timer){
        timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
        while(timer->TC_CV >= 1) ;
 }
+// stop clock
+void StopTicks(void){
+       AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;
+       AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS;       
+}