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2025-08-31 19:53:50 -05:00
commit 652e2d358c
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--- a/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_i2c_ex.c
+++ b/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_i2c_ex.c
@ -0,0 +1,182 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_hal_i2c_ex.c
+  * @author  MCD Application Team
+  * @brief   I2C Extension HAL module driver.
+  *          This file provides firmware functions to manage the following
+  *          functionalities of I2C extension peripheral:
+  *           + Extension features functions
+  *
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2016 STMicroelectronics.
+  * All rights reserved.
+  *
+  * This software is licensed under terms that can be found in the LICENSE file
+  * in the root directory of this software component.
+  * If no LICENSE file comes with this software, it is provided AS-IS.
+  *
+  ******************************************************************************
+  @verbatim
+  ==============================================================================
+               ##### I2C peripheral extension features  #####
+  ==============================================================================
+
+  [..] Comparing to other previous devices, the I2C interface for STM32F427xx/437xx/
+       429xx/439xx devices contains the following additional features :
+
+       (+) Possibility to disable or enable Analog Noise Filter
+       (+) Use of a configured Digital Noise Filter
+
+                     ##### How to use this driver #####
+  ==============================================================================
+  [..] This driver provides functions to configure Noise Filter
+    (#) Configure I2C Analog noise filter using the function HAL_I2C_AnalogFilter_Config()
+    (#) Configure I2C Digital noise filter using the function HAL_I2C_DigitalFilter_Config()
+
+  @endverbatim
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_hal.h"
+
+/** @addtogroup STM32F4xx_HAL_Driver
+  * @{
+  */
+
+/** @defgroup I2CEx I2CEx
+  * @brief I2C HAL module driver
+  * @{
+  */
+
+#ifdef HAL_I2C_MODULE_ENABLED
+
+#if  defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+/** @defgroup I2CEx_Exported_Functions I2C Exported Functions
+  * @{
+  */
+
+
+/** @defgroup I2CEx_Exported_Functions_Group1 Extension features functions
+ *  @brief   Extension features functions
+ *
+@verbatim
+ ===============================================================================
+                      ##### Extension features functions #####
+ ===============================================================================
+    [..] This section provides functions allowing to:
+      (+) Configure Noise Filters
+
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Configures 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)
+  {
+    hi2c->State = HAL_I2C_STATE_BUSY;
+
+    /* Disable the selected I2C peripheral */
+    __HAL_I2C_DISABLE(hi2c);
+
+    /* Reset I2Cx ANOFF bit */
+    hi2c->Instance->FLTR &= ~(I2C_FLTR_ANOFF);
+
+    /* Disable the analog filter */
+    hi2c->Instance->FLTR |= AnalogFilter;
+
+    __HAL_I2C_ENABLE(hi2c);
+
+    hi2c->State = HAL_I2C_STATE_READY;
+
+    return HAL_OK;
+  }
+  else
+  {
+    return HAL_BUSY;
+  }
+}
+
+/**
+  * @brief  Configures 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 0x00 and 0x0F.
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_I2CEx_ConfigDigitalFilter(I2C_HandleTypeDef *hi2c, uint32_t DigitalFilter)
+{
+  uint16_t tmpreg = 0;
+
+  /* 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)
+  {
+    hi2c->State = HAL_I2C_STATE_BUSY;
+
+    /* Disable the selected I2C peripheral */
+    __HAL_I2C_DISABLE(hi2c);
+
+    /* Get the old register value */
+    tmpreg = hi2c->Instance->FLTR;
+
+    /* Reset I2Cx DNF bit [3:0] */
+    tmpreg &= ~(I2C_FLTR_DNF);
+
+    /* Set I2Cx DNF coefficient */
+    tmpreg |= DigitalFilter;
+
+    /* Store the new register value */
+    hi2c->Instance->FLTR = tmpreg;
+
+    __HAL_I2C_ENABLE(hi2c);
+
+    hi2c->State = HAL_I2C_STATE_READY;
+
+    return HAL_OK;
+  }
+  else
+  {
+    return HAL_BUSY;
+  }
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+#endif
+
+#endif /* HAL_I2C_MODULE_ENABLED */
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+