基于51单片机的篮球计时计分器，源代码+仿真原理图 -

#include <reg51.h>
#include<intrins.h>
sbit led=P1^7;
sbit sy=P1^6;
bit second=0,trun=1;
unsigned char key,t1,t2=24;
unsigned char SMG_CA[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff};
unsigned char score[8]={0,0,0,0,0,0,0,0};
void delayms(unsigned int x)
{
unsigned char t;
while(x--)
for (t=0;t<120;t++);
}
void service_int0 (void) interrupt 0
{
key=P1& 0x0f;
}
void timer0(void) interrupt 1
{
t1++;
if (t1==20)
{
t1=0; second=1;
}
TH0=0X3C;TL0=0Xb0;
}
void Alarm(unsigned char m)
{
unsigned char n,k;
for(n=0;n<200;n++)
{
sy=~sy;
for(k=0;k<m;k++); //由参数t行成不同的频率
}
}
main ()
{
unsigned char i,wei=0x80,a=0,a1=0,a2=0,a3=0,b=0,b1=0,b2=0,b3=0;
TMOD=0X01;
TH0=0X3C;
TL0=0Xb0;
TR0=1;
ET0=1;
IT0=1;
EX0=1;
EA=1;
sy=0;
while(1)
{
if(key==0x0e)
{
a=a+1;
a3=a/100;
a2=(a-a3*100)/10;
a1=a-a3*100-a2*10;
score[0]=a3;score[1]=a2;score[2]=a1;
}
if(key==0x0d)
{
b=b+1;
b3=b/100;
b2=(b-b3*100)/10;
b1=b-b3*100-b2*10;
score[5]=b3;score[6]=b2;score[7]=b1;
}
score[3]=t2/10;
score[4]=t2%10;
if (key==0x0c)
{
trun=~trun;
if (trun==0) {TR0=0;led=0;}
else {TR0=1;led=1;}
}
if(key==0x0b) {t2=24;}
key=0;
if(second==1)
{
second=0;
t2--;
if(t2<=0||t2>24)
{
t2=0;
Alarm(90);
}
……………………
…………限于本文篇幅余下代码请从51黑下载附件…………

复制代码