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2 mjames 1 
/**
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  ******************************************************************************
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  * @file    stm32f1xx_hal_gpio_ex.c
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  * @author  MCD Application Team
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  * @version V1.0.4
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  * @date    29-April-2016
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  * @brief   GPIO Extension HAL module driver.
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  *         This file provides firmware functions to manage the following
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  *          functionalities of the General Purpose Input/Output (GPIO) extension peripheral.
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  *           + Extended features functions
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  *        
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  @verbatim
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  ==============================================================================
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                    ##### GPIO Peripheral extension features #####
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  ==============================================================================        
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  [..] GPIO module on STM32F1 family, manage also the AFIO register:
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       (+) Possibility to use the EVENTOUT Cortex feature
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                     ##### How to use this driver #####
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  ==============================================================================
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  [..] This driver provides functions to use EVENTOUT Cortex feature
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    (#) Configure EVENTOUT Cortex feature using the function HAL_GPIOEx_ConfigEventout()
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    (#) Activate EVENTOUT Cortex feature using the HAL_GPIOEx_EnableEventout()
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    (#) Deactivate EVENTOUT Cortex feature using the HAL_GPIOEx_DisableEventout()
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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) 2016 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 "stm32f1xx_hal.h"
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/** @addtogroup STM32F1xx_HAL_Driver
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  * @{
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  */
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/** @defgroup GPIOEx GPIOEx
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  * @brief GPIO HAL module driver
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  * @{
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  */
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#ifdef HAL_GPIO_MODULE_ENABLED
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/** @defgroup GPIOEx_Exported_Functions GPIOEx Exported Functions
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  * @{
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  */
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/** @defgroup GPIOEx_Exported_Functions_Group1 Extended features functions
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 *  @brief    Extended features functions
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 *
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@verbatim  
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  ==============================================================================
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                 ##### Extended features functions #####
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  ==============================================================================  
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    [..]  This section provides functions allowing to:
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    (+) Configure EVENTOUT Cortex feature using the function HAL_GPIOEx_ConfigEventout()
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    (+) Activate EVENTOUT Cortex feature using the HAL_GPIOEx_EnableEventout()
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    (+) Deactivate EVENTOUT Cortex feature using the HAL_GPIOEx_DisableEventout()
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@endverbatim
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  * @{
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  */
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/**
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  * @brief  Configures the port and pin on which the EVENTOUT Cortex signal will be connected.
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  * @param  GPIO_PortSource Select the port used to output the Cortex EVENTOUT signal.
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  *   This parameter can be a value of @ref GPIOEx_EVENTOUT_PORT.
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  * @param  GPIO_PinSource Select the pin used to output the Cortex EVENTOUT signal.
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  *   This parameter can be a value of @ref GPIOEx_EVENTOUT_PIN.
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  * @retval None
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  */  
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void HAL_GPIOEx_ConfigEventout(uint32_t GPIO_PortSource, uint32_t GPIO_PinSource)
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{
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  /* Verify the parameters */
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  assert_param(IS_AFIO_EVENTOUT_PORT(GPIO_PortSource));
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  assert_param(IS_AFIO_EVENTOUT_PIN(GPIO_PinSource));
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  /* Apply the new configuration */
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  MODIFY_REG(AFIO->EVCR, (AFIO_EVCR_PORT)|(AFIO_EVCR_PIN), (GPIO_PortSource)|(GPIO_PinSource));
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}
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/**
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  * @brief  Enables the Event Output.
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  * @retval None
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  */
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void HAL_GPIOEx_EnableEventout(void)
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{
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  SET_BIT(AFIO->EVCR, AFIO_EVCR_EVOE);
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}
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/**
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  * @brief  Disables the Event Output.
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  * @retval None
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  */
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void HAL_GPIOEx_DisableEventout(void)
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{
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  CLEAR_BIT(AFIO->EVCR, AFIO_EVCR_EVOE);
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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 /* HAL_GPIO_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****/