main.bak

AT917S64,ARM处理器的程序。有中断

#include <AT91SAM7S64.h>

void delay_1ms(unsigned int n)                                      
  {
   unsigned int i;
   unsigned int j;
   for (j=0;j<n;j++)
   {
   for (i=0;i<3000;i++);
   }
  }

void  TC2_int(void)  __irq
{
	unsigned int i;
	i= *AT91C_TC2_SR;  
//	*AT91C_AIC_ICCR=AT91C_ID_TC2; 
	if((*AT91C_PIOA_ODSR)&AT91C_PIO_PA0) *AT91C_PIOA_CODR=0X01;
	else                                 *AT91C_PIOA_SODR=0X01;
    *AT91C_AIC_EOICR = 0x00;
}

void   TC2_init(void)
{
       *AT91C_PIOA_PER = 0xFFFFFFFF;                                     
       *AT91C_PIOA_OER = AT91C_PIO_PA0 | AT91C_PIO_PA1|
                         AT91C_PIO_PA2 | AT91C_PIO_PA3;  
       *AT91C_PIOA_SODR=0xffffffff;                             
       *AT91C_PMC_PCER = 1<<AT91C_ID_TC2;                                
       *AT91C_TC2_CCR  = AT91C_TC_CLKEN;                                 
       *AT91C_TC2_CMR  = AT91C_TC_WAVE|AT91C_TC_WAVESEL_UP_AUTO|AT91C_TC_CLKS_TIMER_DIV5_CLOCK;
       *AT91C_TC2_RC   = 65535;
       *AT91C_TC2_IER  = AT91C_TC_CPCS;
       AT91C_AIC_SMR[AT91C_ID_TC2] = AT91C_AIC_PRIOR_LOWEST|AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE;
       *AT91C_AIC_IECR = 1<<AT91C_ID_TC2;                                  
       AT91C_AIC_SVR[AT91C_ID_TC2]=(unsigned int)*TC2_int;
       *AT91C_TC2_CCR  = 0x04;
}

int  main (void)
{
       TC2_init(); 
       while(1);

}