i2c_master.h

这是用瑞萨单片机Ｒ8Ｃ写的ＩＩＣ程序

/************************************************************************************
*																					*
*	File Name	: main.c															*
*	Contents	: Definition and declaration of I2C communication program			*
*					 (master transmit/receive mode) sample program for R8C/2D Group	*
*	Copyright(C)2007, Renesas Technology Corp.										*
*	Copyright(C)2007, Renesas Solutions Corp.										*
*	All rights reserved.															*
*	Version		: 2.00																*
*	note		: 1.00	: First version												*
*				: 2.00	: This header modified										*
************************************************************************************/

#ifndef __akd_h__
#define __akd_h__
/* Definition of variables in RAM area */
unsigned char count = 3;						/* the number of bytes on transmist data */
unsigned char data[3] = {0xba, 0x00, 0x20};		/* transmit data */
unsigned char data_store[3];					/* receive data */
unsigned char mode;								/* transmi/receive mode */
unsigned char info = 1;							/* ACK/NACK flag */

/* Declaration of function prototypes */
extern void sfr_init(void);						/* Initial setting of I2C SFR */
extern void i2c_communication(void);			/* communication main routine */
extern void start_condition(void);				/* start condition generation */
extern unsigned char transmit_slave_address(void);
			/* transmission of slave address with the direciton of transmit/receive */
extern unsigned char transmit_data(void);		/* data transmission */
extern unsigned char transmit_data_reg(void);
extern void stop_condition(void);				/* stop condition generation */
extern void receive_data(void);					/* data receive */
extern void last_2bytes_data_receive(unsigned char r_count);
				/* the last 2 bytes of data receive and stop condition generation */

/* Definition of ACK error and transmit/receive mode */
#define	NG			0
#define	OK			1

#define	transmit	1
#define	receive		0

#endif