timer

#include <targets\AT91SAM7.h>

int main(void)
{

PMC_PCER=PMC_PCER_PIOB|PMC_PCER_TC0;
PIOB_PER=PIOB_PER_P20;
PIOB_OER=(1<<20);


//ustawianie timera
TC0_CCR=TC0_CCR_CLKDIS;
TC0_IDR=0xFF;
TC0_SR;
TC0_CMR=(1<<2);
TC0_CCR=TC0_CCR_CLKEN|TC0_CCR_SWTRG;

PIOB_OWER=PIOB_OWER_P20;

while(1)
{
if((TC0_SR&TC0_SR_COVFS)!=0){
PIOB_ODSR^=(1<<20);
}
}
}