main.h

基于89S52的电子时钟

#ifndef __MAIN_H__
#define __MAIN_H__

#include <at89x51.h>
#define bell_on   P1&=~(1<<0)
#define bell_off  P1|=(1<<0)
#define led_on    P1&=~(1<<2)
#define led_off   P1|=(1<<2) 
extern unsigned char timer_1s_ok;
void delayXms(unsigned int x) ;
#endif