////////////////SMBUS總線頭文件///////////////////
///////////smbus.h////////////////////////////////
#include <C8051F040.h>
typedef unsigned int uint;
typedef unsigned char uchar;
typedef unsigned long ulong;
uchar temppage;
bit isnewdata;
uchar k;//SMBUS數(shù)據(jù)長度 
void smbus_cfg(uchar smb0cn,uchar smb0cr,uchar smb0adr){
	SFRPAGE=0x00;
	SMB0CN=smb0cn;//SMBUS 控制寄存器設(shè)置
	SMB0CR=smb0cr;//SMBUS 波特率設(shè)置
	SMB0ADR=smb0adr;//SMBUS從機地址和廣播使能設(shè)置
	EIE1|= 0x02;//開啟SMBUS中斷
}
void smbusMasterStart(){//此函數(shù)用來啟動主機發(fā)送起始位，主機發(fā)送完起始位將引發(fā)中斷
	k=0;//將smbus數(shù)據(jù)索引指向0
	SFRPAGE=0x00;
	STA=1;
}