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/*
* File : drv_i2c.h
* This file is part of gkipc BSP for RT-Thread distribution.
*
* Copyright (c) 2017 ChengDu goke Microelectronics Co., Ltd.
* All rights reserved
*
* 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.
*
* Visit http://www.goke.com to get contact with goke.
*
* Change Logs:
* Date Author Notes
*/
#ifndef _I2C_H_
#define _I2C_H_
#include <rtthread.h>
/*!
*******************************************************************************
** \brief I2C channel number.
*******************************************************************************
*/
typedef enum
{
RT_I2C_CHANNEL_ONE = 0, /*!< I2C channel 1.*/
RT_I2C_CHANNEL_TWO, /*!< I2C channel 2.*/
}RT_I2C_ChannelT;
/*!
*******************************************************************************
** \brief I2C operition modes.
*******************************************************************************
*/
typedef enum
{
RT_I2C_GENERIC_MASTER_MODE, /*!< Generic master mode.*/
RT_I2C_GENERIC_SLAVER_MODE, /*!< Generic slave mode.*/
RT_I2C_AUTO_MASTER_MODE, /*!< Auto master mode.*/
RT_I2C_AUTO_SLAVER_MODE, /*!< Auto slave mode.*/
RT_I2C_DMA_MASTER_MODE, /*!< DMA master mode.*/
RT_I2C_DMA_SLAVER_MODE, /*!< DMA slave mode.*/
}RT_I2C_OpenModeT;
/*!
*******************************************************************************
** \brief Protocol modes.
*******************************************************************************
*/
typedef enum
{
RT_I2C_COMMON_PROTOCOL = 0, /*!< Common protocol.*/
RT_I2C_RESTART_PROTOCOL, /*!< Protocol with restart.*/
}RT_I2C_ProtocolT;
/*!
*******************************************************************************
** \brief I2C datarate speed modes.
*******************************************************************************
*/
typedef enum
{
RT_I2C_100KBPS = 100000, /*!< 100kHz datarate.*/
RT_I2C_400KBPS = 400000, /*!< 400kHz datarate.*/
}RT_I2C_SpeedT;
/*!
*******************************************************************************
** \brief I2C transmit modes.
*******************************************************************************
*/
typedef enum
{
RT_I2C_NORMAL = 0,
RT_I2C_TURBO_MODE, // write operation only.
RT_I2C_INTERRUPT,
}RT_I2C_ModeT;
/*!
*******************************************************************************
** \brief Init parameters.
*******************************************************************************
*/
typedef struct
{
RT_I2C_OpenModeT mode; /*!< Operation mode.*/
rt_int8_t priority; /*!< IRQ priority */
rt_int8_t gpioSdaPinCh1; /*!< GPIO SDA pin assigmnet channel 1.*/
rt_int8_t gpioSclPinCh1; /*!< GPIO SCL pin assigmnet channel 1.*/
rt_int8_t gpioSdaPinCh2; /*!< For future use.*/
rt_int8_t gpioSclPinCh2; /*!< For future use.*/
}RT_I2C_InitParamsT;
/*!
*******************************************************************************
** \brief Open parameters.
*******************************************************************************
*/
typedef struct
{
RT_I2C_ChannelT channel; /*!< i2c channel index*/
RT_I2C_SpeedT speed; /*!< i2c speed*/
RT_I2C_ModeT mode; /*!< i2c mode*/
}RT_I2C_OpenParamsT;
typedef struct gk_i2c_config
{
RT_I2C_InitParamsT i2cInitParams;
}gk_i2c_config_s;
typedef struct gk_i2c_obj
{
rt_uint32_t id;
rt_uint32_t handle;
rt_mutex_t lock;
gk_i2c_config_s config;
}gk_i2c_obj_s;
void rt_hw_i2c_init(void);
#endif/*_I2C_H_*/
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