/*
==================================================================================================
								SMBus?hardware?operations
This?file?contains?some?operations?of?C8051Fxxxx?serials?MCU.?It?afford?several?functions.?It?use?
the?internal?Timer1?to?generate?the?clock?source?of?SMbus.?So?you?can?not?use?the?TIMER1?in?the
other?files.
Author?	:?LiYong
Date	:?2008.09.20
Compiler:?Keil?C51?V8.02
Version?:?1.0	
Resource:?SMBus?Timer-1	
Support?MCU:
		C8051F340?C8051F320
==================================================================================================
*/
#define??_C8051F_SMBUS_C_
#include?“C8051F_SMBus.H“

static?void?Delay（?unsigned?char?x?）;
static?void?Timer1Init（?char?sw?）?;
SMBUS_STATE?SMbusAccessSlaver（?unsigned?char?ChipAddr?unsigned?char?Dir?）;
/*
==================================================================================================
Delay????:??Delay?some?time?to?finish?some?operations
InPut	?:	x				
Output	?:	None
Note?	?:	None
==================================================================================================
*/
static	void	Delay（?unsigned?int?x?）
{
?	while（?--x?）;

}
/*
==================================================================================================
WaitFlag_SI:?Wait?the?SMbus?finish?the?current?operation.
InPut	???:?None				
Output	???:?1:successful?0:time?out?
Note?	???:?None
==================================================================================================
*/
static??unsigned?char?WaitFlag_SI（?void?）
{
	unsigned?int?	count?=?50000;
	while（?!SI?）
	{
	?	Delay（?1000?）;
		if（?--count?==?0?）	
		{
		?	return?0;
		}
	}??
	return?1;
}
/*
==================================================================================================
Timer1Init:?	Initialize?the?timer1?This?is?the?clock?source?of?the?SMbus
InPut	?:	-sw?:?0:?turn?off?else?turn?on					
Output	?:	None
Note?	?:	None
==================================================================================================
*/
static?void????Timer1Init（?char?sw?）?
{??
	unsigned?char?clock?=?（?SMBUS_CLOCK?>?10?）???10?:?SMBUS_CLOCK;

???if（?sw?==?SMBUS_ON?）
???{
???????CKCON?&=?~（?1<<3?）;//clock?source?:?Fsys/12?=?4MHz:
	???????
???????TMOD?&=?0x0f;
???????TMOD?|=?0x20;????????????????????????????
????
???????TH1?=?（?clock?^?0xFF?）?+?1;
???????TR1?=?1;
??????//?ET1?=?1;//do?not?enter?the?interrupt?handler
????}
????else?if（?sw?==?SMBUS_OFF?）
????{
????????TMOD?&=?0x0f;???
????????TR1?=?0;
????}
}
/*
==================================================================================================
SMBusInit:?	Initialize?the?SMbus?of?C8051Fxxxx?serial?MCU
InPut	?:	-sw?:?turn?on?or?off?the?SMBus?turn?off?to?reduce?the?power?consumption					
Output	?:	None
Note?	?:	None
==================================================================================================
*/
void????SMBusInit（?unsigned?char?sw?）
{
????i

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????目錄??????????0??2009-07-17?20:46??新建文件夾

?????目錄??????????0??2009-07-17?20:46??新建文件夾\Datasheet

?????文件?????189883??2009-04-01?21:50??新建文件夾\Datasheet\AMS1117-3[1].3.pdf

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?????文件?????430549??2006-11-18?08:35??新建文件夾\Datasheet\max232.pdf

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?????文件?????279647??2008-12-08?20:50??新建文件夾\Datasheet\USB枚舉過程圖解.pdf

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?????目錄??????????0??2009-07-17?20:46??新建文件夾\Examples

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?????文件???????5780??2009-07-05?14:36??新建文件夾\Examples\24c02\C8051F_SMbus.H

?????文件??????21186??2009-07-05?17:31??新建文件夾\Examples\24c02\C8051F_SMbus.LST

?????文件??????15506??2009-07-05?17:31??新建文件夾\Examples\24c02\C8051F_SMbus.OBJ

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