UPD: got the latest updates (@badboy) from @zhovner mfdread.

[proxmark3-svn] / armsrc / ticks.c

diff --git a/armsrc/ticks.c b/armsrc/ticks.c
index 43b006ffc93e5ed941f7ed6f5d790fc666c8cdcf..555685cc2550d7318774cbc6bacfdd861154eab6 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
@@ -48,8 +47,7 @@ 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
@@ -61,14 +59,14 @@ 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() {
+void StartCountUS(void) {
        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;
 
@@ -91,35 +89,17 @@ void StartCountUS() {
        while (AT91C_BASE_TC1->TC_CV >= 1);
 }
 
-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);
-}
-// attempt at high resolution microsecond timer
-// beware: timer counts in 21.3uS increments (1024/48Mhz)
-void SpinDelayCountUs(uint32_t us) {
-       if (us < 8) return;
-       us += GetCountUS();     
-       while ( GetCountUS() < us ){}
-}
-// static uint32_t GlobalUsCounter = 0;
-// uint32_t RAMFUNC GetDeltaCountUS(){
-       // uint32_t g_cnt = GetCountUS();
-       // uint32_t g_res = g_cnt - GlobalUsCounter;
-       // GlobalUsCounter = g_cnt;
-       // return g_res;
-// }
+
+
 //  -------------------------------------------------------------------------
 //  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
@@ -181,10 +161,10 @@ void ResetSspClk(void) {
        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);     
 }
 
-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);
@@ -192,17 +172,16 @@ uint32_t RAMFUNC GetCountSspClk(){
 }
 
 
+//  -------------------------------------------------------------------------
+//  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);
        AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_TIOA0 | AT91C_TCB_TC2XC2S_NONE;
-
-       // fast clock TC0
-       // tick=1.5mks
-       AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; // timer disable
+       AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;
        AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV3_CLOCK;  //clock at 48/32 MHz
-       
-       // Enable and reset timer
        AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
        AT91C_BASE_TCB->TCB_BCR = 1;
        // wait until timer becomes zero.
@@ -231,5 +210,5 @@ void ResetTicks(){
 }
 void ResetTimer(AT91PS_TC timer){
        timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
-       while(timer->TC_CV > 1) ;
+       while(timer->TC_CV >= 1) ;
 }