}

按鍵模塊：

頭文件：

#ifndef SD_KEY_H#define SD_KEY_Hvoid KeysIntCfg();#endif
實現文件：
#include<iocc2530.h>void delay(){   int i,j;   for(i=0;i<1000;i++)     for(j=0;j<30;j++);}void KeysIntCfg(){//Key3  Key4   Key5          P1SEL &=~0X02;     P1DIR &=~0X02;     IEN2|=0x10;//開P1IE組中斷     P1IEN|=0x02;//開Key3組內中斷     PICTL|=0x02;//設置P1_1為下降沿          P2SEL &=~0X01;     P2DIR &=~0X01;     IEN2|=0x02;     P2IEN|=0x01;     PICTL|=0x08;//設置P2_0為下降沿          P0SEL &=~0X20;     P0DIR &=~0X20;     P0IE=1;//或者寫成 IEN1|=0x20     P0IEN|=0x20;     PICTL|=0x01;//設置P0_5為下降沿               EA=1;      //開總中斷}#pragma vector=P1INT_VECTOR__interrupt void Key3_ISR() //P1_1{     delay();     if(P1IFG & 0X02)     {         P1DIR |=0X01;         P1_0 ^=1;               }     P1IFG =0;     P1IF=0;}#pragma vector=P2INT_VECTOR__interrupt void Key4_ISR()//P2_0{      delay();     if(P2IFG & 0X01)     {            P0DIR |=0x02;           P0_1 ^=1;     }     P2IFG =0;     P2IF=0;}#pragma vector=P0INT_VECTOR__interrupt void Key5_ISR()//P0_5{    delay();    if(P0IFG & 0X20)    {           P0SEL &=~0x10;           P0DIR |=0X10;           P0_4 ^=1;        }     P0IFG =0;     P0IF=0;}