#ifndef _BSP_I2C_H
#define _BSP_I2C_H
/***************************************************************
Copyright © zuozhongkai Co., Ltd. 1998-2019. All rights reserved.
文件名	: 	 bsp_i2c.c
作者	   : 左忠凯
版本	   : V1.0
描述	   : IIC驱动文件。
其他	   : 无
论坛 	   : www.openedv.com
日志	   : 初版V1.0 2019/1/15 左忠凯创建
***************************************************************/
#include "bsp.h"

/* 相关宏定义 */
#define I2C_STATUS_OK				(0)
#define I2C_STATUS_BUSY				(1)
#define I2C_STATUS_IDLE				(2)
#define I2C_STATUS_NAK				(3)
#define I2C_STATUS_ARBITRATIONLOST	(4)
#define I2C_STATUS_TIMEOUT			(5)
#define I2C_STATUS_ADDRNAK			(6)


/*
 * I2C方向枚举类型
 */
enum i2c_direction
{
    kI2C_Write = 0x0, 		/* 主机向从机写数据 */
    kI2C_Read = 0x1,  		/* 主机从从机读数据 */
} ;

/*
 * 主机传输结构体
 */
struct i2c_transfer
{
    unsigned char slaveAddress;      	/* 7位从机地址 			*/
    enum i2c_direction direction; 		/* 传输方向 			*/
    unsigned int subaddress;       		/* 寄存器地址			*/
    unsigned char subaddressSize;    	/* 寄存器地址长度 			*/
    unsigned char *volatile data;    	/* 数据缓冲区 			*/
    volatile unsigned int dataSize;  	/* 数据缓冲区长度 			*/
};


/*
 *函数声明
 */
void i2c_init(I2C_Type *base);
unsigned char i2c_master_start(I2C_Type *base, unsigned char address, enum i2c_direction direction);
unsigned char i2c_master_repeated_start(I2C_Type *base, unsigned char address,  enum i2c_direction direction);
unsigned char i2c_check_and_clear_error(I2C_Type *base, unsigned int status);
unsigned char i2c_master_stop(I2C_Type *base);
void i2c_master_write(I2C_Type *base, const unsigned char *buf, unsigned int size);
void i2c_master_read(I2C_Type *base, unsigned char *buf, unsigned int size);
unsigned char i2c_master_transfer(I2C_Type *base, struct i2c_transfer *xfer);


#endif