单片机C语言程序设计：INT0 及 INT1 中断计数

/* 名称：INT0 及 INT1 中断计数

说明：每次按下第 1 个计数键时，

第 1 组计数值累加并显示在右边 3 只数

码管上， 每次按下第 2 个计数键时，第

2 组计数值累加并显示在左边 3 只数码管上，后两个按键分别清零。

*/

#includereg51.h>

#define uchar unsigned char

#define uint unsigned int

sbit K3=P3^4; //2 个清零键

sbit K4=P3^5;

//数码管段码与位码

uchar code DSY_CODE[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff};

uchar code DSY_Scan_Bits[]={0x20,0x10,0x08,0x04,0x02,0x01};

//2 组计数的显示缓冲，前 3 位一组，后 3 位一组

uchar data Buffer_Counts[]={0,0,0,0,0,0};

uint Count_A,Count_B=0;

//延时

void DelayMS(uint x)

{

uchar t;

while(x--) for(t=0;t120;t++);

}

//数据显示

void Show_Counts()

{

uchar i;

Buffer_Counts[2]=Count_A/100;

Buffer_Counts[1]=Count_A%100/10;

Buffer_Counts[0]=Count_A%10;

{

if( Buffer_Counts[2]==0)

Buffer_Counts[2]=0x0a;

if( Buffer_Counts[1]==0)

}

Buffer_Counts[1]=0x0a;

Buffer_Counts[5]=Count_B/100;

Buffer_Counts[4]=Count_B%100/10;

Buffer_Counts[3]=Count_B%10;

if( Buffer_Counts[5]==0)

{

Buffer_Counts[5]=0x0a;

if( Buffer_Counts[4]==0)

Buffer_Counts[4]=0x0a;

}

for(i=0;i6;i++)

{

P2=DSY_Scan_Bits[i];

P1=DSY_CODE[Buffer_Counts[i]];

DelayMS(1);

}

}

//主程序

void main()

{

IE=0x85;

PX0=1;中断优先

IT0=1;

IT1=1;

while(1)

{

if(K3==0) Count_A=0;

if(K4==0) Count_B=0;

Show_Counts();

}

}

//INT0 中断函数

void EX_INT0() interrupt 0

{

Count_A++;

}

//INT1 中断函数

void EX_INT1() interrupt 2

{

Count_B++;

}