text: /**
    ******************************************************************************
    * @file    stm32h7xx_hal_smbus_ex.c
    * @author  MCD Application Team
    * @brief   SMBUS Extended HAL module driver.
    *          This file provides firmware functions to manage the following
    *          functionalities of SMBUS Extended peripheral:
    *           + Extended features functions
    *
    ******************************************************************************
    * @attention
    *
    * Copyright (c) 2017 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
    ==============================================================================
                 ##### SMBUS peripheral Extended features  #####
    ==============================================================================
  
    [..] Comparing to other previous devices, the SMBUS interface for STM32H7xx
         devices contains the following additional features
  
         (+) Disable or enable wakeup from Stop mode(s)
         (+) Disable or enable Fast Mode Plus
  
                       ##### How to use this driver #####
    ==============================================================================
      (#) Configure the enable or disable of SMBUS Wake Up Mode using the functions :
            (++) HAL_SMBUSEx_EnableWakeUp()
            (++) HAL_SMBUSEx_DisableWakeUp()
      (#) Configure the enable or disable of fast mode plus driving capability using the functions :
            (++) HAL_SMBUSEx_EnableFastModePlus()
            (++) HAL_SMBUSEx_DisableFastModePlus()
    @endverbatim
    */
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32h7xx_hal.h"
  
  /** @addtogroup STM32H7xx_HAL_Driver
    * @{
    */
  
  /** @defgroup SMBUSEx SMBUSEx
    * @brief SMBUS Extended HAL module driver
    * @{
    */
  
  #ifdef HAL_SMBUS_MODULE_ENABLED
  
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private function prototypes -----------------------------------------------*/
  /* Private functions ---------------------------------------------------------*/
  
  /** @defgroup SMBUSEx_Exported_Functions SMBUS Extended Exported Functions
    * @{
    */
  
  /** @defgroup SMBUSEx_Exported_Functions_Group2 WakeUp Mode Functions
    * @brief    WakeUp Mode Functions
    *
  @verbatim
   ===============================================================================
                        ##### WakeUp Mode Functions #####
   ===============================================================================
      [..] This section provides functions allowing to:
        (+) Configure Wake Up Feature
  
  @endverbatim
    * @{
    */
  
  /**
    * @brief  Enable SMBUS wakeup from Stop mode(s).
    * @param  hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
    *                the configuration information for the specified SMBUSx peripheral.
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_SMBUSEx_EnableWakeUp(SMBUS_HandleTypeDef *hsmbus)
  {
    /* Check the parameters */
    assert_param(IS_I2C_WAKEUP_FROMSTOP_INSTANCE(hsmbus->Instance));
  
    if (hsmbus->State == HAL_SMBUS_STATE_READY)
    {
      /* Process Locked */
      __HAL_LOCK(hsmbus);
  
      hsmbus->State = HAL_SMBUS_STATE_BUSY;
  
      /* Disable the selected SMBUS peripheral */
      __HAL_SMBUS_DISABLE(hsmbus);
  
      /* Enable wakeup from stop mode */
      hsmbus->Instance->CR1 |= I2C_CR1_WUPEN;
  
      __HAL_SMBUS_ENABLE(hsmbus);
  
      hsmbus->State = HAL_SMBUS_STATE_READY;
  
      /* Process Unlocked */
      __HAL_UNLOCK(hsmbus);
  
      return HAL_OK;
    }
    else
    {
      return HAL_BUSY;
    }
  }
  
  /**
    * @brief  Disable SMBUS wakeup from Stop mode(s).
    * @param  hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
    *                the configuration information for the specified SMBUSx peripheral.
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_SMBUSEx_DisableWakeUp(SMBUS_HandleTypeDef *hsmbus)
  {
    /* Check the parameters */
    assert_param(IS_I2C_WAKEUP_FROMSTOP_INSTANCE(hsmbus->Instance));
  
    if (hsmbus->State == HAL_SMBUS_STATE_READY)
    {
      /* Process Locked */
      __HAL_LOCK(hsmbus);
  
      hsmbus->State = HAL_SMBUS_STATE_BUSY;
  
      /* Disable the selected SMBUS peripheral */
      __HAL_SMBUS_DISABLE(hsmbus);
  
      /* Disable wakeup from stop mode */
      hsmbus->Instance->CR1 &= ~(I2C_CR1_WUPEN);
  
      __HAL_SMBUS_ENABLE(hsmbus);
  
      hsmbus->State = HAL_SMBUS_STATE_READY;
  
      /* Process Unlocked */
      __HAL_UNLOCK(hsmbus);
  
      return HAL_OK;
    }
    else
    {
      return HAL_BUSY;
    }
  }
  /**
    * @}
    */
  
  /** @defgroup SMBUSEx_Exported_Functions_Group3 Fast Mode Plus Functions
    * @brief    Fast Mode Plus Functions
    *
  @verbatim
   ===============================================================================
                        ##### Fast Mode Plus Functions #####
   ===============================================================================
      [..] This section provides functions allowing to:
        (+) Configure Fast Mode Plus
  
  @endverbatim
    * @{
    */
  
  /**
    * @brief Enable the SMBUS fast mode plus driving capability.
    * @param ConfigFastModePlus Selects the pin.
    *   This parameter can be one of the @ref SMBUSEx_FastModePlus values
    * @note  For I2C1, fast mode plus driving capability can be enabled on all selected
    *        I2C1 pins using SMBUS_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 SMBUS_FASTMODEPLUS_I2C1 parameter.
    * @note  For all I2C2 pins fast mode plus driving capability can be enabled
    *        only by using SMBUS_FASTMODEPLUS_I2C2 parameter.
    * @note  For all I2C3 pins fast mode plus driving capability can be enabled
    *        only by using SMBUS_FASTMODEPLUS_I2C3 parameter.
    * @note  For all I2C4 pins fast mode plus driving capability can be enabled
    *        only by using SMBUS_FASTMODEPLUS_I2C4 parameter.
    * @note  For all I2C5 pins fast mode plus driving capability can be enabled
    *        only by using SMBUS_FASTMODEPLUS_I2C5 parameter.
    * @retval None
    */
  void HAL_SMBUSEx_EnableFastModePlus(uint32_t ConfigFastModePlus)
  {
    /* Check the parameter */
    assert_param(IS_SMBUS_FASTMODEPLUS(ConfigFastModePlus));
  
    /* Enable SYSCFG clock */
    __HAL_RCC_SYSCFG_CLK_ENABLE();
  
    /* Enable fast mode plus driving capability for selected pin */
    SET_BIT(SYSCFG->PMCR, (uint32_t)ConfigFastModePlus);
  }
  
  /**
    * @brief Disable the SMBUS fast mode plus driving capability.
    * @param ConfigFastModePlus Selects the pin.
    *   This parameter can be one of the @ref SMBUSEx_FastModePlus values
    * @note  For I2C1, fast mode plus driving capability can be disabled on all selected
    *        I2C1 pins using SMBUS_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 SMBUS_FASTMODEPLUS_I2C1 parameter.
    * @note  For all I2C2 pins fast mode plus driving capability can be disabled
    *        only by using SMBUS_FASTMODEPLUS_I2C2 parameter.
    * @note  For all I2C3 pins fast mode plus driving capability can be disabled
    *        only by using SMBUS_FASTMODEPLUS_I2C3 parameter.
    * @note  For all I2C4 pins fast mode plus driving capability can be disabled
    *        only by using SMBUS_FASTMODEPLUS_I2C4 parameter.
    * @note  For all I2C5 pins fast mode plus driving capability can be disabled
    *        only by using SMBUS_FASTMODEPLUS_I2C5 parameter.
    * @retval None
    */
  void HAL_SMBUSEx_DisableFastModePlus(uint32_t ConfigFastModePlus)
  {
    /* Check the parameter */
    assert_param(IS_SMBUS_FASTMODEPLUS(ConfigFastModePlus));
  
    /* Enable SYSCFG clock */
    __HAL_RCC_SYSCFG_CLK_ENABLE();
  
    /* Disable fast mode plus driving capability for selected pin */
    CLEAR_BIT(SYSCFG->PMCR, (uint32_t)ConfigFastModePlus);
  }
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  #endif /* HAL_SMBUS_MODULE_ENABLED */
  /**
    * @}
    */
  
  /**
    * @}
    */
  