/**+
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  ******************************************************************************+
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  * @file    stm32f4xx_hal_i2c_ex.c+
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  * @author  MCD Application Team+
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  * @brief   I2C Extension HAL module driver.+
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  *          This file provides firmware functions to manage the following +
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  *          functionalities of I2C extension peripheral:+
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  *           + Extension features functions+
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  *    +
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  @verbatim+
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  ==============================================================================+
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               ##### I2C peripheral extension features  #####+
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  ==============================================================================+
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           +
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  [..] Comparing to other previous devices, the I2C interface for STM32F427xx/437xx/ +
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       429xx/439xx devices contains the following additional features :+
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       +
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       (+) Possibility to disable or enable Analog Noise Filter+
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       (+) Use of a configured Digital Noise Filter+
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   +
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                     ##### How to use this driver #####+
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  ==============================================================================+
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  [..] This driver provides functions to configure Noise Filter+
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    (#) Configure I2C Analog noise filter using the function HAL_I2C_AnalogFilter_Config()+
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    (#) Configure I2C Digital noise filter using the function HAL_I2C_DigitalFilter_Config()+
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  +
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  @endverbatim+
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  ******************************************************************************+
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  * @attention+
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  *+
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  * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>+
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  *+
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  * Redistribution and use in source and binary forms, with or without modification,+
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  * are permitted provided that the following conditions are met:+
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  *   1. Redistributions of source code must retain the above copyright notice,+
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  *      this list of conditions and the following disclaimer.+
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  *   2. Redistributions in binary form must reproduce the above copyright notice,+
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  *      this list of conditions and the following disclaimer in the documentation+
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  *      and/or other materials provided with the distribution.+
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  *   3. Neither the name of STMicroelectronics nor the names of its contributors+
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  *      may be used to endorse or promote products derived from this software+
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  *      without specific prior written permission.+
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  *+
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  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"+
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  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE+
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  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE+
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  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE+
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  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL+
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  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR+
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  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER+
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  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,+
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  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE+
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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.+
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  *+
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  ******************************************************************************+
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  */ +
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+
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/* Includes ------------------------------------------------------------------*/+
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#include "stm32f4xx_hal.h"+
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+
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/** @addtogroup STM32F4xx_HAL_Driver+
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  * @{+
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  */+
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+
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/** @defgroup I2CEx I2CEx+
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  * @brief I2C HAL module driver+
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  * @{+
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  */+
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+
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#ifdef HAL_I2C_MODULE_ENABLED+
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+
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#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) ||\+
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    defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE) || defined(STM32F446xx) ||\+
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    defined(STM32F469xx) || defined(STM32F479xx) || defined(STM32F413xx) || defined(STM32F423xx)+
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/* Private typedef -----------------------------------------------------------*/+
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/* Private define ------------------------------------------------------------*/+
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/* Private macro -------------------------------------------------------------*/+
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/* Private variables ---------------------------------------------------------*/+
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/* Private function prototypes -----------------------------------------------*/+
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/* Exported functions --------------------------------------------------------*/+
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/** @defgroup I2CEx_Exported_Functions I2C Exported Functions+
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  * @{+
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  */+
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+
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+
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/** @defgroup I2CEx_Exported_Functions_Group1 Extension features functions +
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 *  @brief   Extension features functions +
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 *+
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@verbatim   +
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 ===============================================================================+
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                      ##### Extension features functions #####+
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 ===============================================================================  +
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    [..] This section provides functions allowing to:+
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      (+) Configure Noise Filters +
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+
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@endverbatim+
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  * @{+
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  */+
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  +
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/**+
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  * @brief  Configures I2C Analog noise filter. +
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  * @param  hi2c pointer to a I2C_HandleTypeDef structure that contains+
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  *                the configuration information for the specified I2Cx peripheral.+
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  * @param  AnalogFilter new state of the Analog filter.+
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  * @retval HAL status+
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  */+
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HAL_StatusTypeDef HAL_I2CEx_ConfigAnalogFilter(I2C_HandleTypeDef *hi2c, uint32_t AnalogFilter)+
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{+
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  /* Check the parameters */+
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  assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));+
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  assert_param(IS_I2C_ANALOG_FILTER(AnalogFilter));+
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  +
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  if(hi2c->State == HAL_I2C_STATE_READY)+
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  {+
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    hi2c->State = HAL_I2C_STATE_BUSY;+
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+
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    /* Disable the selected I2C peripheral */+
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    __HAL_I2C_DISABLE(hi2c);    +
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+
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    /* Reset I2Cx ANOFF bit */+
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    hi2c->Instance->FLTR &= ~(I2C_FLTR_ANOFF);+
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+
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    /* Disable the analog filter */+
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    hi2c->Instance->FLTR |= AnalogFilter;+
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+
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    __HAL_I2C_ENABLE(hi2c); +
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+
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    hi2c->State = HAL_I2C_STATE_READY;+
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+
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    return HAL_OK;+
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  }+
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  else+
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  {+
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    return HAL_BUSY;+
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  }+
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}+
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+
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/**+
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  * @brief  Configures I2C Digital noise filter. +
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  * @param  hi2c pointer to a I2C_HandleTypeDef structure that contains+
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  *                the configuration information for the specified I2Cx peripheral.+
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  * @param  DigitalFilter Coefficient of digital noise filter between 0x00 and 0x0F.+
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  * @retval HAL status+
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  */+
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HAL_StatusTypeDef HAL_I2CEx_ConfigDigitalFilter(I2C_HandleTypeDef *hi2c, uint32_t DigitalFilter)+
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{+
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  uint16_t tmpreg = 0;+
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+
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  /* Check the parameters */+
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  assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));+
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  assert_param(IS_I2C_DIGITAL_FILTER(DigitalFilter));+
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  +
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  if(hi2c->State == HAL_I2C_STATE_READY)+
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  {+
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    hi2c->State = HAL_I2C_STATE_BUSY;+
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    +
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    /* Disable the selected I2C peripheral */+
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    __HAL_I2C_DISABLE(hi2c);  +
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    +
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    /* Get the old register value */+
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    tmpreg = hi2c->Instance->FLTR;+
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    +
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    /* Reset I2Cx DNF bit [3:0] */+
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    tmpreg &= ~(I2C_FLTR_DNF);+
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    +
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    /* Set I2Cx DNF coefficient */+
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    tmpreg |= DigitalFilter;+
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    +
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    /* Store the new register value */+
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    hi2c->Instance->FLTR = tmpreg;+
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    +
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    __HAL_I2C_ENABLE(hi2c); +
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    +
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    hi2c->State = HAL_I2C_STATE_READY;+
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    +
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    return HAL_OK; +
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  }+
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  else+
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  {+
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    return HAL_BUSY; +
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  }+
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}  +
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+
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/**+
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  * @}+
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  */+
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+
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/**+
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  * @}+
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  */  +
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#endif /* STM32F427xx || STM32F429xx || STM32F437xx || STM32F439xx || STM32F401xC ||\+
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          STM32F401xE || STM32F446xx || STM32F469xx || STM32F479xx || STM32F413xx ||\+
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		  STM32F423xx */+
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+
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#endif /* HAL_I2C_MODULE_ENABLED */+
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/**+
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  * @}+
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  */+
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+
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/**+
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  * @}+
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  */+
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+
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/+
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