i2c_drv.h

一款车载DVD的车机源程序（正在生成中的哦）

/***************************************************************************
Project  :  Car two ting dvd System
Compiler :  ST7 HiCross C (HiWARE)
Module   :  autos.c 
Version  :  V 1.0
Created  :  24 11, 2005
Author   :  tomi / SA
Description
         -  I2c.  
Modified
		 - tomi
***************************************************************************/
#include "Libr.h"
#include "St72321.h"
#include "IOport.h"

//#define SDA 			6
//#define SCL 			7       

#define	Set_SDA_High			SetBit(PA_DR,SDA)
#define	Set_SDA_Low				ClrBit(PA_DR,SDA)


#define	Set_SCL_High			SetBit(PA_DR,SCL)
#define	Set_SCL_Low				ClrBit(PA_DR,SCL)

#define	SCL_High				ValBit(PA_DR,SCL)
#define	SCL_Low					!ValBit(PA_DR,SCL)

#define	SDA_High				ValBit(PA_DR,SDA)
#define	SDA_Low					!ValBit(PA_DR,SDA)

#define	SET_SDA_AS_INPUT  			ClrBit(PA_DDR, SDA) && ClrBit(PA_OR,SDA)
#define	SET_SDA_AS_OUTPUT 		SetBit(PA_DDR, SDA) && ClrBit(PA_OR,SDA)
#define	IS_SDA_HIGH				ValBit(PA_DR,SDA)

#define	TWD_SPEED       0x01		//value: 1 (Fastest), 2 (slower), ... N (much slower)
#define	TWD_LONG_TIME	(TWD_SPEED*8)
#define	TWD_SHORT_TIME	(TWD_SPEED*1)

extern unsigned char I2CReadByte(unsigned char cDevAddr, unsigned char cReg);
extern unsigned char I2CReadByte_no_sub(unsigned char cDevAddr);
extern unsigned char I2CWriteByte(unsigned char cDevAddr, unsigned char cReg, unsigned char cData);
extern unsigned char I2CReadBytes(unsigned char cDevAddr, unsigned char cReg, unsigned char *pString, unsigned char cNum);
extern unsigned char I2CWriteByte_noAddrsss(unsigned char cDevAddr,unsigned char cData);
extern unsigned char I2CWrite_nBytes(unsigned char cDevAddr,unsigned char *buff,unsigned char num);
extern unsigned char I2C_write_sub(unsigned char cDevAddr,unsigned char sub_addr,unsigned char *buff,unsigned char num);
extern void OSDCfgWr(unsigned char  index,unsigned char dat);
extern unsigned char twdWr_Burst_A(unsigned char cReg);
extern void twdWr_Burst_D(unsigned char cData);
extern void twdWr_Burst_P(void);