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/**

  ******************************************************************************

  * @file    stm32f0xx_hal_i2c_ex.c

  * @author  MCD Application Team

  * @brief   I2C Extended HAL module driver.

  *          This file provides firmware functions to manage the following

  *          functionalities of I2C Extended peripheral:

  *           + Extended features functions

  *

  @verbatim

  ==============================================================================

               ##### I2C peripheral Extended features  #####

  ==============================================================================

  [..] Comparing to other previous devices, the I2C interface for STM32F0xx

       devices contains the following additional features

       (+) Possibility to disable or enable Analog Noise Filter

       (+) Use of a configured Digital Noise Filter

       (+) Disable or enable wakeup from Stop mode(s)

       (+) Disable or enable Fast Mode Plus

                     ##### How to use this driver #####

  ==============================================================================

  [..] This driver provides functions to configure Noise Filter and Wake Up Feature

    (#) Configure I2C Analog noise filter using the function HAL_I2CEx_ConfigAnalogFilter()

    (#) Configure I2C Digital noise filter using the function HAL_I2CEx_ConfigDigitalFilter()

    (#) Configure the enable or disable of I2C Wake Up Mode using the functions :

          (++) HAL_I2CEx_EnableWakeUp()

          (++) HAL_I2CEx_DisableWakeUp()

    (#) Configure the enable or disable of fast mode plus driving capability using the functions :

          (++) HAL_I2CEx_EnableFastModePlus()

          (++) HAL_I2CEx_DisableFastModePlus()

  @endverbatim

  ******************************************************************************

  * @attention

  *

  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.

  * All rights reserved.</center></h2>

  *

  * This software component is licensed by ST under BSD 3-Clause license,

  * the "License"; You may not use this file except in compliance with the

  * License. You may obtain a copy of the License at:

  *                        opensource.org/licenses/BSD-3-Clause

  *

  ******************************************************************************

  */

/* Includes ------------------------------------------------------------------*/

#include "stm32f0xx_hal.h"

/** @addtogroup STM32F0xx_HAL_Driver

  * @{

  */

/** @defgroup I2CEx I2CEx

  * @brief I2C Extended HAL module driver

  * @{

  */

#ifdef HAL_I2C_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

/* Private function prototypes -----------------------------------------------*/

/* Private functions ---------------------------------------------------------*/

/** @defgroup I2CEx_Exported_Functions I2C Extended Exported Functions

  * @{

  */

/** @defgroup I2CEx_Exported_Functions_Group1 Extended features functions

  * @brief    Extended features functions

 *

@verbatim

 ===============================================================================

                      ##### Extended features functions #####

 ===============================================================================

    [..] This section provides functions allowing to:

      (+) Configure Noise Filters

      (+) Configure Wake Up Feature

      (+) Configure Fast Mode Plus

@endverbatim

  * @{

  */

/**

  * @brief  Configure I2C Analog noise filter.

  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains

  *                the configuration information for the specified I2Cx peripheral.

  * @param  AnalogFilter New state of the Analog filter.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_I2CEx_ConfigAnalogFilter(I2C_HandleTypeDef *hi2c, uint32_t AnalogFilter)

{

  /* Check the parameters */

  assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));

  assert_param(IS_I2C_ANALOG_FILTER(AnalogFilter));

  if (hi2c->State == HAL_I2C_STATE_READY)

  {

    /* Process Locked */

    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY;

    /* Disable the selected I2C peripheral */

    __HAL_I2C_DISABLE(hi2c);

    /* Reset I2Cx ANOFF bit */

    hi2c->Instance->CR1 &= ~(I2C_CR1_ANFOFF);

    /* Set analog filter bit*/

    hi2c->Instance->CR1 |= AnalogFilter;

    __HAL_I2C_ENABLE(hi2c);

    hi2c->State = HAL_I2C_STATE_READY;

    /* Process Unlocked */

    __HAL_UNLOCK(hi2c);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

/**

  * @brief  Configure I2C Digital noise filter.

  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains

  *                the configuration information for the specified I2Cx peripheral.

  * @param  DigitalFilter Coefficient of digital noise filter between Min_Data=0x00 and Max_Data=0x0F.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_I2CEx_ConfigDigitalFilter(I2C_HandleTypeDef *hi2c, uint32_t DigitalFilter)

{

  uint32_t tmpreg;

  /* Check the parameters */

  assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));

  assert_param(IS_I2C_DIGITAL_FILTER(DigitalFilter));

  if (hi2c->State == HAL_I2C_STATE_READY)

  {

    /* Process Locked */

    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY;

    /* Disable the selected I2C peripheral */

    __HAL_I2C_DISABLE(hi2c);

    /* Get the old register value */

    tmpreg = hi2c->Instance->CR1;

    /* Reset I2Cx DNF bits [11:8] */

    tmpreg &= ~(I2C_CR1_DNF);

    /* Set I2Cx DNF coefficient */

    tmpreg |= DigitalFilter << 8U;

    /* Store the new register value */

    hi2c->Instance->CR1 = tmpreg;

    __HAL_I2C_ENABLE(hi2c);

    hi2c->State = HAL_I2C_STATE_READY;

    /* Process Unlocked */

    __HAL_UNLOCK(hi2c);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

#if defined(I2C_CR1_WUPEN)

/**

  * @brief  Enable I2C wakeup from Stop mode(s).

  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains

  *                the configuration information for the specified I2Cx peripheral.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_I2CEx_EnableWakeUp(I2C_HandleTypeDef *hi2c)

{

  /* Check the parameters */

  assert_param(IS_I2C_WAKEUP_FROMSTOP_INSTANCE(hi2c->Instance));

  if (hi2c->State == HAL_I2C_STATE_READY)

  {

    /* Process Locked */

    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY;

    /* Disable the selected I2C peripheral */

    __HAL_I2C_DISABLE(hi2c);

    /* Enable wakeup from stop mode */

    hi2c->Instance->CR1 |= I2C_CR1_WUPEN;

    __HAL_I2C_ENABLE(hi2c);

    hi2c->State = HAL_I2C_STATE_READY;

    /* Process Unlocked */

    __HAL_UNLOCK(hi2c);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

/**

  * @brief  Disable I2C wakeup from Stop mode(s).

  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains

  *                the configuration information for the specified I2Cx peripheral.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_I2CEx_DisableWakeUp(I2C_HandleTypeDef *hi2c)

{

  /* Check the parameters */

  assert_param(IS_I2C_WAKEUP_FROMSTOP_INSTANCE(hi2c->Instance));

  if (hi2c->State == HAL_I2C_STATE_READY)

  {

    /* Process Locked */

    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY;

    /* Disable the selected I2C peripheral */

    __HAL_I2C_DISABLE(hi2c);

    /* Enable wakeup from stop mode */

    hi2c->Instance->CR1 &= ~(I2C_CR1_WUPEN);

    __HAL_I2C_ENABLE(hi2c);

    hi2c->State = HAL_I2C_STATE_READY;

    /* Process Unlocked */

    __HAL_UNLOCK(hi2c);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

#endif

/**

  * @brief Enable the I2C fast mode plus driving capability.

  * @param ConfigFastModePlus Selects the pin.

  *   This parameter can be one of the @ref I2CEx_FastModePlus values

  * @note  For I2C1, fast mode plus driving capability can be enabled on all selected

  *        I2C1 pins using I2C_FASTMODEPLUS_I2C1 parameter or independently

  *        on each one of the following pins PB6, PB7, PB8 and PB9.

  * @note  For remaining I2C1 pins (PA14, PA15...) fast mode plus driving capability

  *        can be enabled only by using I2C_FASTMODEPLUS_I2C1 parameter.

  * @note  For all I2C2 pins fast mode plus driving capability can be enabled

  *        only by using I2C_FASTMODEPLUS_I2C2 parameter.

  * @retval None

  */

void HAL_I2CEx_EnableFastModePlus(uint32_t ConfigFastModePlus)

{

  /* Check the parameter */

  assert_param(IS_I2C_FASTMODEPLUS(ConfigFastModePlus));

  /* Enable SYSCFG clock */

  __HAL_RCC_SYSCFG_CLK_ENABLE();

  /* Enable fast mode plus driving capability for selected pin */

  SET_BIT(SYSCFG->CFGR1, (uint32_t)ConfigFastModePlus);

}

/**

  * @brief Disable the I2C fast mode plus driving capability.

  * @param ConfigFastModePlus Selects the pin.

  *   This parameter can be one of the @ref I2CEx_FastModePlus values

  * @note  For I2C1, fast mode plus driving capability can be disabled on all selected

  *        I2C1 pins using I2C_FASTMODEPLUS_I2C1 parameter or independently

  *        on each one of the following pins PB6, PB7, PB8 and PB9.

  * @note  For remaining I2C1 pins (PA14, PA15...) fast mode plus driving capability

  *        can be disabled only by using I2C_FASTMODEPLUS_I2C1 parameter.

  * @note  For all I2C2 pins fast mode plus driving capability can be disabled

  *        only by using I2C_FASTMODEPLUS_I2C2 parameter.

  * @retval None

  */

void HAL_I2CEx_DisableFastModePlus(uint32_t ConfigFastModePlus)

{

  /* Check the parameter */

  assert_param(IS_I2C_FASTMODEPLUS(ConfigFastModePlus));

  /* Enable SYSCFG clock */

  __HAL_RCC_SYSCFG_CLK_ENABLE();

  /* Disable fast mode plus driving capability for selected pin */

  CLEAR_BIT(SYSCFG->CFGR1, (uint32_t)ConfigFastModePlus);

}

/**

  * @}

  */

/**

  * @}

  */

#endif /* HAL_I2C_MODULE_ENABLED */

/**

  * @}

  */

/**

  * @}

  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/