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/*
* File : ls1c_i2c.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2017-09-06 ���� first version
*/
// Ӳ��i2c�ӿڵ�ͷ�ļ�
#ifndef __OPENLOONGSON_I2C_H
#define __OPENLOONGSON_I2C_H
// I2C��ʱ��Ƶ��
#define LS1C_I2C_CLOCK_DEFAULT (100000) // Hz. Ĭ��Ƶ��
#define LS1C_I2C_CLOCK_MAX (400000) // Hz, max 400 Kbits/sec
// I2Cģ����
typedef enum
{
LS1C_I2C_0 = 0,
LS1C_I2C_1,
LS1C_I2C_2
}ls1c_i2c_t;
// I2C���ݴ��䷽��
typedef enum
{
LS1C_I2C_DIRECTION_WRITE = 0, // ������ӻ�д��Ϣ
LS1C_I2C_DIRECTION_READ, // ������ӻ�����Ϣ
}ls1c_i2c_direction_t;
// Ӳ��I2C��Ϣ
typedef struct
{
ls1c_i2c_t I2Cx; // i2cģ����
unsigned long clock; // i2cʱ��Ƶ�ʣ���λhz
}ls1c_i2c_info_t;
// I2CӦ��
typedef enum
{
LS1C_I2C_ACK = 0, // �յ�Ӧ��
LS1C_I2C_NACK = 1, // û�յ�Ӧ��
}ls1c_i2c_ack_t;
// ��������ֵ
typedef enum
{
LS1C_I2C_RET_OK = 0, // OK
LS1C_I2C_RET_TIMEOUT, // ��ʱ
}ls1c_i2c_ret_t;
/*
* ��ʼ��ָ��i2cģ��
* @i2c_info_p ij��i2cģ�����Ϣ
*/
void i2c_init(ls1c_i2c_info_t *i2c_info_p);
/*
* (�ٷ���һ���ֽ�����֮��)���մӻ����͵�ACK�ź�
* @i2c_info_p i2cģ����Ϣ
* @ret LS1C_I2C_ACK or LS1C_I2C_NACK
*/
ls1c_i2c_ack_t i2c_receive_ack(ls1c_i2c_info_t *i2c_info_p);
/*
* ��������
* @i2c_info_p i2cģ����Ϣ
* @buf ���ݻ���
* @len ���������ݵij���
*/
ls1c_i2c_ret_t i2c_receive_data(ls1c_i2c_info_t *i2c_info_p, unsigned char *buf, int len);
/*
* ����START�źź͵�ַ
* @i2c_info_p i2cģ����Ϣ
* @slave_addr �ӻ���ַ
* @direction ���ݴ��䷽��(����д)
*/
ls1c_i2c_ret_t i2c_send_start_and_addr(ls1c_i2c_info_t *i2c_info_p,
unsigned char slave_addr,
ls1c_i2c_direction_t direction);
/*
* ��������
* @i2c_info_p i2cģ����Ϣ
* @data �����͵�����
* @len ���������ݵij���
*/
ls1c_i2c_ret_t i2c_send_data(ls1c_i2c_info_t *i2c_info_p, unsigned char *data, int len);
/*
* ����STOP�ź�
* @i2c_info_p i2cģ����Ϣ
*/
void i2c_send_stop(ls1c_i2c_info_t *i2c_info_p);
#endif
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