i2c.h

MicoCANOpen很好的学习源代码

#ifndef __I2CH__        /* Schutz gegen mehrfaches #include */
#define __I2CH__

/***********************************************************************
 *      i2c.h
 *      Funktion: Headerdatei fuer das Softwaremodul "i2c_sw.c".
 *
 *      Autor   : Tan Choon Hock, Siemens SCPL HLM
 *      Sprache : Keil-C167
 *
 *      ----------------------------------------------------------------
 *      Copyright (C) 1998 by Joerg Hoppe, Hock
 *      */

/***********************************************************************
 *	I2C_MasterChipSelect
 *	schreibt das Controlbyte zum Ansprechen eines Chips
 *	auf den I2C-Bus
 *	typeaddr: 4-Bit feste Kennung eines Chip
 *	chipaddr: 3 Bit variable Adresse eines Chip
 *	rw: 0 = Schreiben, 1 = Lesen
 ***********************************************************************/

#define I2C_MasterChipSelect(typeaddr,chipaddr,read) \
	    I2C_MasterWrite( ((typeaddr) << 4) | ((chipaddr) << 1) | (read))
#define I2C_CTL_READ	1
#define I2C_CTL_WRITE	0

uchar   I2C_Init(void);
void    I2C_Start(void);
uchar   I2C_MasterWrite(uchar input_byte);
uchar   I2C_MasterRead(uchar ack);
uchar   I2C_Stop(void);
void    I2C_Delay(long count);

/*  Haupt Functionen */

void  I2C_Page_Read  (word adr,uchar *dat,word len);
void  I2C_Page_Write (word adr,uchar *dat,word len);
void  I2C_Byte_Write (word adr,uchar dat);
uchar I2C_Byte_Read  (word adr);


#endif