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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung (from <libmaple/i2c.h>).
* Copyright (c) 2012 LeafLabs, LLC.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/**
* @file libmaple/include/libmaple/i2c_common.h
* @author Marti Bolivar <mbolivar@leaflabs.com>
* @brief This file is an implementation detail
*
* CONTENTS UNSTABLE. The existence of this file is an implementation
* detail. Never include it directly. If you need something from
* here, include <libmaple/i2c.h> instead.
*/
#ifndef _LIBMAPLE_I2C_COMMON_H_
#define _LIBMAPLE_I2C_COMMON_H_
#include <libmaple/libmaple_types.h>
#include <libmaple/nvic.h>
#include <libmaple/rcc.h>
struct gpio_dev;
struct i2c_reg_map;
struct i2c_msg;
/** I2C device states */
typedef enum i2c_state {
I2C_STATE_DISABLED = 0, /**< Disabled */
I2C_STATE_IDLE = 1, /**< Idle */
I2C_STATE_XFER_DONE = 2, /**< Done with transfer */
I2C_STATE_BUSY = 3, /**< Busy */
I2C_STATE_ERROR = -1 /**< Error occurred */
} i2c_state;
/**
* @brief I2C device type.
*/
typedef struct i2c_dev {
struct i2c_reg_map *regs; /**< Register map */
struct i2c_msg *msg; /**< Messages */
uint32 error_flags; /**< Error flags, set on I2C error condition */
volatile uint32 timestamp; /**< For internal use */
/**
* @brief Deprecated. Use .scl_port or .sda_port instead.
* If non-null, this will be used as SDA, SCL pins' GPIO port. If
* null, then .sda_port will be used for SDA, and .sda_port for
* SDA. */
struct gpio_dev *gpio_port;
/**
* @brief SDA GPIO device (but see .gpio_port).
*/
struct gpio_dev *sda_port;
/**
* @brief SCL GPIO device (but see .gpio_port).
*/
struct gpio_dev *scl_port;
uint16 msgs_left; /**< Messages left */
uint8 sda_pin; /**< SDA bit on gpio_port */
uint8 scl_pin; /**< SCL bit on gpio_port */
rcc_clk_id clk_id; /**< RCC clock information */
nvic_irq_num ev_nvic_line; /**< Event IRQ number */
nvic_irq_num er_nvic_line; /**< Error IRQ number */
volatile i2c_state state; /**< Device state */
} i2c_dev;
#endif
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