MINI2440 按键中断程序.rar

#include<s3c2440.h> /* LED IO控制，数据，上拉寄存器 */ //#define GPBCON (*(volatile unsigned *)0x56000010) //#define GPBDAT (*(volatile unsigned *)0x56000014) //#define GPBUP (*(volatile unsigned *)0x56000018) //#define GPGCON (*(volatile unsigned *)0x56000060) //#define GPGDAT (*(volatile unsigned *)0x56000064) //#define GPGUP (*(volatile unsigned *)0x56000068) /* LED1-4对应的GPB5,GPB6,GPB7,GPB8 */ #define GPB5_out (1<<(5*2)) //LED1 #define GPB6_out (1<<(6*2)) //LED2 #define GPB7_out (1<<(7*2)) //LED3 #define GPB8_out (1<<(8*2)) //LED4 /* K1-K6对应GPG0,GPG3,GPG5,GPG6,GPG7,GPG11 */ #define GPG11_in ~(3<<(11*2)) //key6 #define GPG7_in ~(3<<(7*2)) //key5 #define GPG6_in ~(3<<(6*2)) //key4 #define GPG5_in ~(3<<(5*2)) //key3 #define GPG3_in ~(3<<(3*2)) //key2 #define GPG0_in ~(3<<(0*2)) //key1 int main() { /*用作读取KEY状态值*/ unsigned long dwDat=0; /*LED1~LED4对应的4根引脚设为输出*/ GPBCON=GPB5_out | GPB6_out | GPB7_out | GPB8_out; //将输出的引脚在配置寄存器中设为01 /*KEY1-KEY6对应的6根引脚设为输入*/ GPGCON=GPG11_in & GPG7_in & GPG6_in & GPG5_in & GPG3_in & GPG0_in;//讲输入的引脚在配置寄存器中设为00 /*关闭KEY和LED的引脚上拉*/ GPBUP=0xFFFFFFFF; GPGUP=0xFFFFFFFF; while(1) { GPBDAT=0xFFFFFFFF; dwDat=GPGDAT; //读取KEY引脚状态 if(dwDat & (1<<11)) //key6是否按下 按下时，电压拉入地,为低电平,状态0 { GPBDAT |=(1<<5); //熄灭LED1 }else{ GPBDAT &=~(1<<5); //点亮LED1 } if(dwDat & (1<<7)) //判断KEY5是否按下 { GPBDAT |=(1<<6); //熄灭LED2 }else{ GPBDAT &=~(1<<6); //点亮LED2 } if(dwDat & (1<<6)) //key4 { GPBDAT |=(1<<7); }else{ GPBDAT &=~(1<<7); } if(dwDat & (1<<5)) //key3 { GPBDAT |=(1<<8); }else{ GPBDAT &=~(1<<8); } if(dwDat & (1<<3)) //key2 { GPBDAT |=(1<<5) | (1<<6); }else{ GPBDAT &=~((1<<5) | (1<<6)); } if(dwDat & (1<<0)) //key1 { GPBDAT |=(1<<7) | (1<<8); }else{ GPBDAT &= ~((1<<7) | (1<<8)); } } return 0; }