| /** |
| ****************************************************************************** |
| * @file stm32l4xx_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 STM32L4xx |
| 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 "stm32l4xx_hal.h" |
| |
| /** @addtogroup STM32L4xx_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. |
| * @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->CFGR1, (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. |
| * @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->CFGR1, (uint32_t)ConfigFastModePlus); |
| } |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* HAL_SMBUS_MODULE_ENABLED */ |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |