text1.c

计时秒表程序

#include<reg51.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit clok=P1^0;
sbit qin=P1^6;
sbit lin=P1^7;
uchar ge,i,shi,num,stop=1;
void delay(uint z)
{
	uint i,j;
	for(i=0;i<z;i++)
		for(j=0;j>120;j++);			
}
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void main()
{	
	uchar k;
	EA=1;
	EX0=1;
	IT0=1;
	while(1)
	{
			shi=num/10;
			ge=num%10;
			k=0xaa;
			for(i=1;i<8;i++)
			{
				
				P2=k;
				k=_crol_(k,1);
				if(i%2==0)
				P0=table[ge];
				if(i%2!=0)
				P0=table[shi];
				delay(50);
			 }
				if(clok==1)
				{
					delay(5);
					if(clok==1)
					{
							while(clok!=0);
							if(stop==1)
						{
								num++;
						}
								if(num==60)
								{
									num=0;
								}
					}
				}
	}
}
void T0_time() interrupt 0
{
		if(i%2==0)
		P0=table[ge];
		if(i%2!=0)
		P0=table[shi];
		if(lin==0)
		{
			delay(5);
			if(lin==0)
			{
				while(lin!=1);
				num=0;
			}
		}
			if(qin==0)
				{
					delay(5);
					if(qin==0)
					{
						while(qin!=0);
						stop=!stop;
					}
				}
}