/*
流水燈:通過P1口控制8個LED燈，呈現霓虹燈效果
*/

#include<reg51.h>

#define uint  unsigned int
#define uchar unsigned char
#define ulong unsigned long
#define TRUE 1 
#define FALSE 0 

sbit BTN=P2^0;

uint model=0;
void Delay(unsigned int msec)
{
  unsigned int x,y;
  for(x=0; x<=msec;x++)
  {
for(y=0;y<=110;y++);
  }
}
 unsigned char ChKey(bit Key)
{
  if(Key==0){
    Delay(100);
    if(Key==0) return(1);
  }
}


void main()
{
	const unsigned char design[15]=
	{0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};
	//const unsigned char design1[9]=
	//{0x03,0x06,0x0c,0x18,0x30,0x18,0x0c,0x06,0x03};
	const unsigned char design2[4]=
	{0x18,0x24,0x42,0x81};
	const unsigned char design3[2]=
	{0x00,0xff};
	 unsigned int a;
	 unsigned char b;


	 do
	 {
		 
		 if(model==1)
		 {
				for(b=0;b<4;b++)
				{
					for(a=0;a<30000;a++);
					P1=~design2[b];
				    if(ChKey(BTN)==1)
					{
		  				 model=2;
						 Delay(500);
					};
				    Delay(100);
				}
		 }
		 else if(model==2)
		 {
				for(b=0;b<2;b++)
				{
					for(a=0;a<30000;a++);
					P1=~design3[b];
				    if(ChKey(BTN)==1)
					{
		  				 model=0;
					};
				    Delay(100);
				}
		 }
		 else
		 {
			  for(b=0;b<15;b++)
				{
					for(a=0;a<30000;a++);
					P1=~design[b];
					if(ChKey(BTN)==1)
					{
		  				 model=1;
						 Delay(500);
					}
				}
		 }

	 }while(1);
}