jishu.c

计数,定时器应用.拨码开关一次只选一个..393作分频器用

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int 
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uint a,b,c,g,a1,a2,a3,a4,a5;
void delay(int x)
{
	unsigned int i,j;
	for(i=x;i>0;i--)
		for(j=24;j>0;j--);
}
void display(uchar wang,uchar qian,uchar bai,uchar shi,uchar ge)
{
  	P0=table[wang];
	P2=0xfe;
	delay(20);
	P2=0xff;

	P0=table[qian];
	P2=0xfd;
	delay(20);
	P2=0xff;

  	P0=table[bai];
	P2=0xfb;
	delay(20);
	P2=0xff;

  	P0=table[shi];
	P2=0xf7;
	delay(20);
	P2=0xff;

  	P0=table[ge];
	P2=0xef;
	delay(20);
	P2=0xff;

}
void main()
{	P2=0xff;
	while(1)
	{
		TMOD=0x05;
		TL0=0x00;
		TH0=0x00;
		TR0=1;
		while(1)
		{
			a=TL0;
			b=TH0;
			c=b*256+a;
			a5=c/10000;
			a4=c%10000/1000;
			a3=c%10000%1000/100;
			a2=c%10000%1000%100/10;
			a1=c%10000%1000%100%10;
			display(a5,a4,a3,a2,a1);
		if(TF0)
		{
			TL0=0x00;
			TH0=0x00;
			TF0=0;
		}
		}
	}
}