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HALLIB/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_i2c_ex.c
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HALLIB/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_i2c_ex.c
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/**
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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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* @version V1.4.2
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* @date 10-November-2015
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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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[..] 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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(+) Possibility to disable or enable Analog Noise Filter
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(+) Use of a configured Digital Noise Filter
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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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@endverbatim
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2015 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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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4xx_hal.h"
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/** @addtogroup STM32F4xx_HAL_Driver
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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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#ifdef HAL_I2C_MODULE_ENABLED
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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)
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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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/** @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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@endverbatim
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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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uint32_t tmp = 0;
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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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tmp = hi2c->State;
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if((tmp == HAL_I2C_STATE_BUSY) || (tmp == HAL_I2C_STATE_BUSY_TX) || (tmp == HAL_I2C_STATE_BUSY_RX))
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{
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return HAL_BUSY;
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}
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hi2c->State = HAL_I2C_STATE_BUSY;
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/* Disable the selected I2C peripheral */
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__HAL_I2C_DISABLE(hi2c);
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/* Reset I2Cx ANOFF bit */
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hi2c->Instance->FLTR &= ~(I2C_FLTR_ANOFF);
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/* Disable the analog filter */
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hi2c->Instance->FLTR |= AnalogFilter;
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__HAL_I2C_ENABLE(hi2c);
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hi2c->State = HAL_I2C_STATE_READY;
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return HAL_OK;
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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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uint32_t tmp = 0;
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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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tmp = hi2c->State;
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if((tmp == HAL_I2C_STATE_BUSY) || (tmp == HAL_I2C_STATE_BUSY_TX) || (tmp == HAL_I2C_STATE_BUSY_RX))
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{
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return HAL_BUSY;
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}
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hi2c->State = HAL_I2C_STATE_BUSY;
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/* Disable the selected I2C peripheral */
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__HAL_I2C_DISABLE(hi2c);
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/* Get the old register value */
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tmpreg = hi2c->Instance->FLTR;
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/* Reset I2Cx DNF bit [3:0] */
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tmpreg &= ~(I2C_FLTR_DNF);
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/* Set I2Cx DNF coefficient */
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tmpreg |= DigitalFilter;
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/* Store the new register value */
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hi2c->Instance->FLTR = tmpreg;
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__HAL_I2C_ENABLE(hi2c);
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hi2c->State = HAL_I2C_STATE_READY;
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return HAL_OK;
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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 */
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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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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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