以單片機為核心，設計壹個節日彩燈控制器，設計要求如下：在單片機的p0口接有8個發光二極管作為指示燈

#include<intrins.h>

#define uchar unsigned char

uchar key,led=0xfe;

void delay(uchar a)

{

uchar i,j;

for(i=0;i<a;i++)

for(j=0;j<120;j++);

}

main()

{

while(1)

{

key=P1&0x0f;

switch(key)

{

case 0x0e:

P0=0xff;

delay(200);

P0=0x00;

delay(200);

break;

case 0x0d:

P0=0x00;

break;

case 0x0b:

P0=led;

led=_crol_(led,1);

delay(100);

break;

case 0x07:

P0=led;

led=_cror_(led,1);

delay(100);

break;

default:break;

}

}

}