/*------------------------
實驗功能：外部中斷0，當P3^2有低電平進入外部中斷0LED1被點亮
------------------------*/
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit duan=P2^6;
sbit wei=P2^7;
sbit led1=P1^0;
uchar num;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(uint);
void main()
{
EA=1;//開總中斷
EX0=1;//外部中斷0允許位
IT0=0;//電平觸發
wei=1;
P0=0xc0;
wei=0;
while(1)
{
for(num=0;num<16;num++)
{
duan=1;
P0=table[num];
duan=0;
delay(500);//0.5s
}
}
}
void delay(uint a)
{
uint i,j;
for(i=a;i>0;i--)
for(j=110;j>0;j--);
}
void exter0() interrupt 0
{
led1=0;
}
|
QQ好友和群
QQ空間
騰訊微博
騰訊朋友
收藏
淘帖
頂
踩
