定时器，上电开始计时，LED每秒闪一次，9小时后继电器吸合3秒，然后释放，计时器重新计时。如此循环。-#include　reg51.h

typedef unsigned char BYTE

typedef unsigned int WORD

#define SYSclk 6000000L



#define MODE1T　　　　//Timer clock mode, commendt this line is 12T mode, uncomment is 1T mode

#ifdef MODE1T

#define T1MS (65536-SYSclk/1000)　　　　//1ms timer calculation method in 1T mode, 1000=1000Hz

#else

#define T1MS (65526-SYSclk/12/1000)　　　　//1ms timer calculation method in 12T mode

#endif