/**
@page GPIO_IOToggle GPIO IO Toggle example
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file GPIO/GPIO_IOToggle/readme.txt
* @author MCD Application Team
* @brief Description of the GPIO EXTI example.
******************************************************************************
* @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.
*
******************************************************************************
@endverbatim
@par Example Description
How to configure and use GPIOs through the HAL API.
On STM32F4xx-Nucleo RevC, PA05
GPIO pin is linked to LED2 - Green.
Main function configures GPIO on output pushpull mode, then in while loop, HAL
toggle pin function is called.
The SystemCoreClock is set to 100 MHz for STM32F411xEx Devices.
@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
to have correct HAL operation.
@note The clock setting is configured to have the max product performance (max clock frequency)
so not optimized in term of power consumption.
@par Keywords
System, GPIO, Output, Alternate function, Push-pull, Toggle
@par Directory contents
- GPIO/GPIO_IOToggle/Inc/stm32f4xx_hal_conf.h HAL configuration file
- GPIO/GPIO_IOToggle/Inc/stm32f4xx_it.h Interrupt handlers header file
- GPIO/GPIO_IOToggle/Inc/main.h Main program header file
- GPIO/GPIO_IOToggle/Src/stm32f4xx_it.c Interrupt handlers
- GPIO/GPIO_IOToggle/Src/main.c Main program
- GPIO/GPIO_IOToggle/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
@par Hardware and Software environment
- This example runs on STM32F411xEx devices.
- This example has been tested with STMicroelectronics STM32F4xx-Nucleo RevC
boards and can be easily tailored to any other supported device
and development board.
@par How to use it ?
In order to make the program work, you must do the following :
- Open your preferred toolchain
- Rebuild all files and load your image into target memory
- Run the example
*/
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