單片機C語言程序設計：INT0 及 INT1 中斷計數(shù)
/* 名稱：INT0 及 INT1 中斷計數(shù)
說明：每次按下第 1 個計數(shù)鍵時，
第 1 組計數(shù)值累加并顯示在右邊 3 只數(shù)
碼管上， 每次按下第 2 個計數(shù)鍵時，第
2 組計數(shù)值累加并顯示在左邊 3 只數(shù)碼管上，后兩個按鍵分別清零。
*/
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit K3=P3^4; //2 個清零鍵
sbit K4=P3^5;
//數(shù)碼管段碼與位碼
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 組計數(shù)的顯示緩沖，前 3 位一組，后 3 位一組
uchar data Buffer_Counts[]={0,0,0,0,0,0};
uint Count_A,Count_B=0;
//延時
void DelayMS(uint x)
{
uchar t;
while(x--) for(t=0;t<120;t++);
}
//數(shù)據(jù)顯示
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;i<6;i++) { P2=DSY_Scan_Bits[i]; P1=DSY_CODE[Buffer_Counts[i]]; DelayMS(1); } } //主程序 void main() { IE=0x85; PX0=1;中斷優(yōu)先 IT0=1; IT1=1; while(1) { if(K3==0) Count_A=0; if(K4==0) Count_B=0; Show_Counts(); } } //INT0 中斷函數(shù) void EX_INT0() interrupt 0 { Count_A++; } //INT1 中斷函數(shù) void EX_INT1() interrupt 2 { Count_B++; }
擴展閱讀：外部INT0中斷控制LED
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