lesson5-1.c

led灯闪烁，左右移动，延时的综合应用

#include <reg52.h>
void delay(unsigned int t)
{
	unsigned int j,k;
	for(k=0;k<t;k++)
		for(j=0;j<125;j++);

}
void main()
{
	unsigned int w,i,g,s,z;
	P1 = 0xf0;
	w = 0x01;
	g = 0x01;
	s = 0x80;
	z = 0x01;
	for(i=0;i<8;i++)
	{
		P0 = w;
		delay(60);
		w=w<<1;
	}
	for(i=8;i>0;i--)
	{
		P0 = s;
		delay(60);
		s=s>>1;
	
	}
	for(i=0;i<8;i++)
	{
		P0 = g;
		delay(100);
		g=g<<1;

	}
	for(i=8;i>0;i--)
	{
		P0 = s;
		delay(60);
		s=s>>1;
	
	}
	for(i=0;i<8;i++)
	{
		P0 = z;
		delay(60);
		z=z<<2;
	
	}

	P0 = 0x55;
	delay(100);
	P0 = 0xaa;
	delay(100);
	P0 = 0xff;
	delay(100);
	P0 = 0x00;
	delay(200);
	P0 = 0xff;
	delay(100);
	P0 = 0x00;
	delay(200);
	P0 = 0xff;
	delay(100);
	P0 = 0x00;
	delay(200);
	P0 = 0xff;
	delay(100);
	P0 = 0x00;
	delay(200);
	P0 = 0xff;
	delay(100);
	P0 = 0xaa;
	delay(200);
	P0 = 0x55;
	delay(200);
	P0 = 0xaa;
	delay(200);
	P0 = 0x55;
	delay(200);
	P0 = 0xaa;
	delay(200);
	P0 = 0x55;
	delay(200);
	P0 = 0xaa;
	delay(200);
	P0 = 0x55;
	delay(200);
	P0 = 0xcc;
	delay(200);
	P0 = 0x33;
	delay(200);
	P0 = 0xcc;
	delay(200);
	P0 = 0x33;
	delay(200);
	P0 = 0xcc;
	delay(200);
	P0 = 0x33;
	delay(200);
	P0 = 0xcc;
	delay(200);
	P0 = 0x33;
	delay(200);
	P0 = 0x81;
	delay(200);
	P0 = 0x7e;
	delay(200);
	P0 = 0x81;
	delay(200);
	P0 = 0x7e;
	delay(200);
	P0 = 0x81;
	delay(200);
	P0 = 0x7e;
	delay(200);
	P0 = 0x81;
	delay(200);
	P0 = 0x7e;
	delay(200);
	P0 = 0x3c;
	delay(200);
	P0 = 0xc3;
	delay(200);
	P0 = 0x3c;
	delay(200);
	P0 = 0xc3;
	delay(200);
	P0 = 0x3c;
	delay(200);
	P0 = 0xc3;
	delay(200);
	P0 = 0x3c;
	delay(200);
	P0 = 0xc3;
	delay(200);


}