流水灯作业.c

51单片机入门级资料。流水灯

#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit wei=P2^7;
uchar k,m,i;
void delay(uint x)
{
	uint a,b;
	for(a=x;a>0;a--)
		for(b=1150;b>0;b--);
}
void main()
{
	P0=0xff;
	wei=1;
	wei=0;
	k=0xfe;
	while(1)
	{
		for(m=0;m<2;m++)
		{ 	
			for(i=1;i%8!=0;i++)
			{
				P0=k;
				delay(50);
				k=_crol_(k,1);
			}
			for(;i>1;i--)
			{
				P0=k;
				delay(50);
				k=_cror_(k,1);
			}
		}
		P0=k;
		delay(50);
		P0=0xff;
		delay(50);
		for(i=0;i<5;i++)
		{
			P0=0x00;
			delay(25);
			P0=0xff;
			delay(25);
		}
	}
}