自己编写的mini240外部按键中断程序

功能：按键K1--K4 相应的灯亮 且闪烁

#include <stdlib.h>

#include <string.h>

#include "def.h"

#include "2440addr.h"

#include "2440lib.h"

#include "2440slib.h"

#include "mmu.h"

#include "def.h"

#include "Option.h"

 

 

  

void  delay(unsigned long dly)

{

for(; dly > 0; dly--);

}

 

 

 void __irq IRQ_KEY()

{

 if(rINTPND==BIT_EINT8_23) 

 

{ ClearPending(BIT_EINT8_23);//清除中断标志

 

 

if(rEINTPEND&(1<<8)) 

{

rGPBDAT = ~(1<<5);//点亮led1

 

delay(40000000);

 

rGPBDAT = (1<<5);//点亮其他led

 

delay(40000000);

         

            

    }

      else if(rEINTPEND&(1<<11))

        {

 rGPBDAT = ~(1<<6);//点亮led2

 

delay(40000000);

 

rGPBDAT = (1<<6);//点亮其他led

 

delay(40000000);

 }

  else if(rEINTPEND&(1<<13)) 

  {

        

        rGPBDAT = ~(1<<7);//点亮led3

 

delay(40000000);

 

rGPBDAT = (1<<7);//点亮其他led

 

delay(40000000);  

   }

else

       {

 rGPBDAT = ~(1<<8);//点亮led4

 

delay(40000000);

 

rGPBDAT = (1<<8);//点亮其他led

 

delay(40000000);

           

  }

 

 }

 

 rGPGCON =rGPGCON & (~((3<<22)|(3<<6)|(3<<0)|(3<<10)|(3<<12)|(3<<14))) |

                         ((2<<22)|(2<<6)|(2<<0)|(2<<10)|(2<<12)|(2<<14));

 

 

 

rEINTPEND |=((1<< 8)|(1<<11)|(1<<13)|(1<<14));//外部中断悬挂寄存器，清0无请求，1时有中断请求

rSRCPND |= (1<<5);//指示中断源状态，0无中断源请求，1时有中断源请求

rINTPND |=(1<<5);//指示中断状态，0无中断请求，1时有中断请求

 

}

void EINT_Init()

{

 

rGPGCON =rGPGCON & (~((3<<22)|(3<<6)|(3<<0)|(3<<10)|(3<<12)|(3<<14))) |

                         ((2<<22)|(2<<6)|(2<<0)|(2<<10)|(2<<12)|(2<<14));

 

 

 rEXTINT0=0x2;//设置为下降沿触发

 

 

 pISR_EINT8_23=(unsigned int)IRQ_KEY;

 

 rINTMOD=0;//所用中断都是IRQ

 

 rINTMSK=0xffffffdf;//开EINT0中断

 

 rEINTMASK &=(~((1<<8)|(1<<11)|(1<<13)|(1<<14)));//使能各个所需要的具体中断

 

}

void Main(void)

{ 

 

 MMU_Init();

 

 rGPBCON =0x55555554;//// 将LED1-4对应的GPB5/6/7/8四个引脚设为输出

 rGPBUP|=0x1e0;

 rGPBDAT=~(1<<5);//开led

 delay(40000000);

 

 EINT_Init();

  while(1)

 {

  rGPBDAT=~0;//关闭led

 }

}