main.c.bak

AT917S64,ARM处理器的程序。有中断的应用。

/****************************************************************************
* 文件名：main.c
* 功  能：
*        
* 说  明：
****************************************************************************/

#include <AT91SAM7S64.h>
//#include <SAM7S.h>
/****************************************************************************
* 文件名：irp_in() 
* 功  能：中断函数
*        
* 说  明：
****************************************************************************/
extern  void delay_1ms(unsigned int n);   
//---------------------------------------------------------------
 void  irp_in(void)  __irq
{
  *AT91C_PIOA_SODR=0x00000001;
  delay_1ms(500);
  *AT91C_PIOA_CODR=0x00000001;
  delay_1ms(500);
  *AT91C_PIOA_SODR=0x00000001;
  delay_1ms(500);
  *AT91C_PIOA_CODR=0x00000001;
  delay_1ms(500);
  *AT91C_PIOA_SODR=0x00000001;
  delay_1ms(500);
  *AT91C_PIOA_CODR=0x00000001;
  delay_1ms(500);
  *AT91C_AIC_EOICR = 0x00;
}
int a,b,b,b,  
//---------------------------------------------------------------
void io_irq_handler(void) __irq//I/O中断函数
{
if(*AT91C_PIOA_ISR&(1<<14|1<<15))   //如果检测到了对应管脚的电平变化
{
  if(!(*AT91C_PIOA_PDSR&(1<<15))) 
  {
    *AT91C_PIOA_SODR=0x00000002;
    delay_1ms(500);
    *AT91C_PIOA_CODR=0x00000002;
    delay_1ms(500);
    *AT91C_PIOA_SODR=0x00000002;
    delay_1ms(500);
    *AT91C_PIOA_CODR=0x00000002;
    delay_1ms(500);
    *AT91C_PIOA_SODR=0x00000002;
    delay_1ms(500);
    *AT91C_PIOA_CODR=0x00000002;
    delay_1ms(500);
  }
  else if(!(*AT91C_PIOA_PDSR&(1<<14)))
  {

    *AT91C_PIOA_SODR=0x00000004;
    delay_1ms(500);
    *AT91C_PIOA_CODR=0x00000004;
    delay_1ms(500);
    *AT91C_PIOA_SODR=0x00000004;
    delay_1ms(500);
    *AT91C_PIOA_CODR=0x00000004;
    delay_1ms(500);
    *AT91C_PIOA_SODR=0x00000004;
    delay_1ms(500);
    *AT91C_PIOA_CODR=0x00000004;
    delay_1ms(500);
  }
}
*AT91C_AIC_EOICR = 1;                     /* End of Interrupt          */
}

extern
/****************************************************************************
* 文件名：init()
* 功  能：初始化ＩＯ、中断
*        
* 说  明：
****************************************************************************/
void   init(void)
{
       unsigned long a;
       *AT91C_PIOA_PER = 0xffffffff;        //设置为POIO
       *AT91C_PIOA_PDR = 1<<20;             //PA20设为外设
       *AT91C_PIOA_BSR = 1<<20;	            //PA20设为外设Ｂ
       *AT91C_PMC_PCER = 1<<20;	            //打开外设时钟
       *AT91C_PIOA_OER = 0x0000000f;        //PA01,PA02,PA03,PA04设为输出
       *AT91C_PIOA_IFER = 0xfffffff0;       //打开虑波
       AT91C_AIC_SVR[AT91C_ID_IRQ0]=(unsigned long) *irp_in;
       a=*AT91C_AIC_ISR;
       AT91C_AIC_SMR[AT91C_ID_IRQ0]=0x02<<6;

       *AT91C_PMC_PCER = (unsigned int)1<<AT91C_ID_PIOA;   //允许IO口的时钟
       *AT91C_AIC_IDCR = 1<<AT91C_ID_PIOA;   //系统里面禁止中断
       *AT91C_PIOA_PER = AT91C_PIO_PA15 | AT91C_PIO_PA14;      //PA16,15作为IO口
       *AT91C_PIOA_ODR = AT91C_PIO_PA15 | AT91C_PIO_PA14;      //PA16,15作为输入
       *AT91C_PIOA_IER = AT91C_PIO_PA15 | AT91C_PIO_PA14;      //使能PA16,15的中断
       *AT91C_AIC_ICCR = 1<<AT91C_ID_PIOA;   //清除中断
       AT91C_AIC_SMR[AT91C_ID_PIOA] = AT91C_AIC_SRCTYPE_EXT_HIGH_LEVEL | 1;
       AT91C_AIC_SVR[AT91C_ID_PIOA]=(unsigned int)*io_irq_handler;

       *AT91C_AIC_IECR = 1<<AT91C_ID_IRQ0;	 //打开ＡＩＣ中断
       *AT91C_AIC_IECR = 1<<AT91C_ID_PIOA;	 //打开ＡＩＣ中断
}
/****************************************************************************
* 文件名：main.c
* 功  能：
*        
* 说  明：
****************************************************************************/
int  main (void)
{
       init();
       while(1)
       {
	 *AT91C_PIOA_SODR=0x00000008;
	 delay_1ms(500);
	 *AT91C_PIOA_CODR=0x00000008;
	 delay_1ms(500);
	 *AT91C_PIOA_SODR=0x00000008;
	 delay_1ms(500);
	 *AT91C_PIOA_CODR=0x00000008;
	 delay_1ms(500);
	 *AT91C_PIOA_SODR=0x00000008;
	 delay_1ms(500);
	 *AT91C_PIOA_CODR=0x00000008;
	 delay_1ms(500);
        }
}