78 lines
2.8 KiB
Plaintext
78 lines
2.8 KiB
Plaintext
/**
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@page GPIO_IOToggle GPIO IO Toggle example
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@verbatim
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******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
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* @file GPIO/GPIO_IOToggle/readme.txt
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* @author MCD Application Team
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* @brief Description of the GPIO EXTI example.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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How to configure and use GPIOs through the HAL API.
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On STM32F4xx-Nucleo RevC, PA05
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GPIO pin is linked to LED2 - Green.
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Main function configures GPIO on output pushpull mode, then in while loop, HAL
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toggle pin function is called.
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The SystemCoreClock is set to 100 MHz for STM32F411xEx Devices.
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
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to have correct HAL operation.
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@note The clock setting is configured to have the max product performance (max clock frequency)
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so not optimized in term of power consumption.
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@par Keywords
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System, GPIO, Output, Alternate function, Push-pull, Toggle
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@par Directory contents
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- GPIO/GPIO_IOToggle/Inc/stm32f4xx_hal_conf.h HAL configuration file
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- GPIO/GPIO_IOToggle/Inc/stm32f4xx_it.h Interrupt handlers header file
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- GPIO/GPIO_IOToggle/Inc/main.h Main program header file
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- GPIO/GPIO_IOToggle/Src/stm32f4xx_it.c Interrupt handlers
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- GPIO/GPIO_IOToggle/Src/main.c Main program
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- GPIO/GPIO_IOToggle/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
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@par Hardware and Software environment
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- This example runs on STM32F411xEx devices.
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- This example has been tested with STMicroelectronics STM32F4xx-Nucleo RevC
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boards and can be easily tailored to any other supported device
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and development board.
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@par How to use it ?
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In order to make the program work, you must do the following :
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- Open your preferred toolchain
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- Rebuild all files and load your image into target memory
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- Run the example
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*/
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