CHG: Small steps, the waiting time between frames was unclear. At least now the...

[proxmark3-svn] / armsrc / util.c

diff --git a/armsrc/util.c b/armsrc/util.c
index 09926747d5cf838e06c376889cf86d512754f1e0..be6170d36ae282479f71fed2fa4cc02044696172 100644 (file)
--- a/armsrc/util.c
+++ b/armsrc/util.c
@@ -351,8 +351,7 @@ void StartCountUS() {
 uint32_t RAMFUNC GetCountUS(){
        //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); 
-       return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV << 1) / 3); 
+       return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV * 2) / 3); 
 }
 void ResetUSClock(void) {      
        //enable clock of timer and software trigger
@@ -363,12 +362,9 @@ void ResetUSClock(void) {
 // attempt at high resolution microsecond timer
 // beware: timer counts in 21.3uS increments (1024/48Mhz)
 void SpinDelayCountUs(uint32_t us) {
-
-       us += GetCountUS();
-       us -= 6;
-       
-       for(;;)
-               if ( GetCountUS() >= us ) return;
+       if (us < 8) return;
+       us += GetCountUS();     
+       while ( GetCountUS() < us ){}
 }
 // static uint32_t GlobalUsCounter = 0;