liushuilight_02.c

使用Keil c51软件开发

#include<reg51.h>
#include<absacc.h>
#include<intrins.h>

#define uchar unsigned char
#define uint unsigned int

#define PA8255 XBYTE[0x3ffc]
#define PB8255 XBYTE[0X3ffd]
#define PC8255 XBYTE[0x3ffe]
#define COM8255 XBYTE[0x3fff]

sbit cs138=P1^6;
uchar LedLoop;

void delay(uchar);

void main(void)
{
  cs138=0;
  COM8255=0x80;
  LedLoop=0xfe;

  
  while(1)
  {PA8255=LedLoop;
   LedLoop=_crol_(LedLoop,2);
 delay(255);delay(255);delay(255);delay(255);
 PA8255=LedLoop;
   LedLoop=_cror_(LedLoop,1);
   delay(255);delay(255);delay(255);delay(255);
  }
}

void delay(uchar x)
{ uchar k;
  while(x--)
   for(k=0;k<125;k++){}
}