clock.h

使用51单片机开发的一个集团电话系统

/**************************************
pj name:           clock.h
author:             RPJ
version:            
description:      the code for 12M and 24M clock
**************************************/
#ifndef	_clock_h_
#define	_clock_h_

#define	CLOCK_12M		1
#define	CLOCK_24M		0


#if CLOCK_12M
#define	TimerH_Xus	0xff
#define	TimerL_Xus	0xec
#define	TimerH_50us	0xff
#define	TimerL_50us	0xce
#define	TimerH_1ms	0xfc
#define	TimerL_1ms	0x18
#define	TimerH_1_14ms	0xfb
#define	TimerL_1_14ms	0x8c
#define	TimerH_2ms	0xf7
#define	TimerL_2ms	0xf0
#define	TimerH_5ms	0xec
#define	TimerL_5ms	0x78
#define	TimerH_15ms	0xc5
#define	TimerL_15ms	0x68
#define	bps1200		0xcc
#define	bps2400		0xe6
#define	bps4800		0xf3
#define	bps9600		0xf9
#define	bps14400		0xfc
#define	delayms		125
#endif

#if CLOCK_24M
#define	TimerH_Xus	0xff
#define	TimerL_Xus	0xd8
#define	TimerH_50us	0xff
#define	TimerL_50us	0x9c
#define	TimerH_1ms	0xf8
#define	TimerL_1ms	0x30
#define	TimerH_2ms	0xef
#define	TimerL_2ms	0xe0
#define	TimerH_5ms	0xd8
#define	TimerL_5ms	0xf0
#define	TimerH_15ms	0x8a
#define	TimerL_15ms	0xd0
#define	bps1200		0x98
#define	bps2400		0xcc
#define	bps4800		0xe6
#define	bps9600		0xf3
#define	bps14400		0xf7
#define	delayms		250
#endif

#endif