独立按键控制数码管显示0-F.zip

#include<reg51.h> //51头文件 unsigned char BT; //定义无符号字符型变量BT unsigned char LED[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//数码管0-F段码 void main()//主函数 { EA=1; //开放总中断 EX0=1; //允许使用外中断 IT0=1; //选择负跳变来触发外中断 while(1) { P1=LED[BT];//读取LED数组对应的段码，赋值给P1显示出来 } } void int0(void) interrupt 0 using 0 //外中断0的中断编号为0 { if (BT<15)//如果BT<15，则BT+1，否则BT=0 { BT=BT+1; } else { BT=0; } }