/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
                 2011 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT 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 3 of the License, or
    (at your option) any later version.

    ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
*/

/**
 * @file    templates/i2c_lld.h
 * @brief   I2C Driver subsystem low level driver header template.
 *
 * @addtogroup I2C
 * @{
 */

#ifndef _I2C_LLD_H_
#define _I2C_LLD_H_

#if HAL_USE_I2C || defined(__DOXYGEN__)

/*===========================================================================*/
/* Driver constants.                                                         */
/*===========================================================================*/

/*===========================================================================*/
/* Driver pre-compile time settings.                                         */
/*===========================================================================*/

/*===========================================================================*/
/* Derived constants and error checks.                                       */
/*===========================================================================*/

/*===========================================================================*/
/* Driver data structures and types.                                         */
/*===========================================================================*/


/**
 * @brief   Type of a structure representing an I2C driver.
 */
typedef struct I2CDriver I2CDriver;

/**
 * @brief   I2C completion callback type.
 *
 * @param[in] i2cp      pointer to the @p I2CDriver object
 * @param[in] sts       operation status
 */
typedef void (*i2ccallback_t)(I2CDriver *i2cp, i2cstatus_t sts);

/**
 * @brief   Driver configuration structure.
 * @note    Implementations may extend this structure to contain more,
 *          architecture dependent, fields.
 */
typedef struct {
  /** @brief I2C bus bit rate.*/
  uint32_t                  ic_speed;
  /* End of the mandatory fields.*/
} I2CConfig;

/**
 * @brief   Structure representing an I2C driver.
 * @note    Implementations may extend this structure to contain more,
 *          architecture dependent, fields.
 */
struct I2CDriver {
  /** @brief Driver state.*/
  i2cstate_t                id_state;
  /** @brief Current configuration data.*/
  const I2CConfig           *id_config;
  /** @brief Current callback.*/
  i2ccallback_t             id_callback;
#if defined(I2C_DRIVER_EXT_FIELDS)
  I2C_DRIVER_EXT_FIELDS
#endif
  /* End of the mandatory fields.*/
};

/*===========================================================================*/
/* Driver macros.                                                            */
/*===========================================================================*/

/*===========================================================================*/
/* External declarations.                                                    */
/*===========================================================================*/

#ifdef __cplusplus
extern "C" {
#endif
  void i2c_lld_init(void);
  void i2c_lld_start(I2CDriver *i2cp);
  void i2c_lld_stop(I2CDriver *i2cp);
  void i2c_lld_master_start(I2CDriver *i2cp, uint16_t header);
  void i2c_lld_master_stop(I2CDriver *i2cp);
  void i2c_lld_master_restart(I2CDriver *i2cp);
  void i2c_lld_master_transmit(I2CDriver *i2cp, size_t n,
                               const uint8_t *txbuf);
  void i2c_lld_master_receive(I2CDriver *i2cp, size_t n, uint8_t *rxbuf);
#ifdef __cplusplus
}
#endif

#endif /* HAL_USE_I2C */

#endif /* _I2C_LLD_H_ */

/** @} */