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#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
uchar code jishu[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88};//顯示數(shù)字0-9
uchar Count=0;
void main()
{ P1=0x00;
P2=0x00;
TMOD=0x06; //計(jì)數(shù)器T0方式2
TH0=TL0=256-1; //計(jì)數(shù)值為1
ET0=1; //允許T0中斷
EX0=1; //允許INT0中斷
EA=1; //允許CPU中斷
IP=0x02; //設(shè)置優(yōu)先級(jí)，T0高于INT0
IT0=1; //INT0中斷觸發(fā)方式為下降沿觸發(fā)
TR0=1; //啟動(dòng)T0
while(1)
{ P1=jishu[Count/10];
P2=jishu[Count%10];
}
}
void Key_Counter() interrupt 1
{
Count=(Count+1)%100; //10以?xún)?nèi)
}
//INT0中斷函數(shù)//
void Clear_Counter() interrupt 0
{
Count=0;
}
//INT0中斷函數(shù),每次按下計(jì)數(shù)鍵時(shí)觸發(fā)INT0中斷，中斷程序累加計(jì)數(shù)，
//方法2
//#include<reg51.h>
//int count;
//main()
//{EA=1;EX0=1;IT0=0;
//while(1){
//display(count);//顯示計(jì)數(shù)值
//}}
// void EXTI0(void) interrupt 0//外部中斷
//{count++;}//計(jì)數(shù)

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