__STM32F4xx_HAL_CONF_H macro

@file stm32f4xx_hal_conf_template.h @author MCD Application Team HAL configuration template file. This file should be copied to the application folder and renamed to stm32f4xx_hal_conf.h. @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.