/**
@page CORTEXM_SysTick CORTEXM SysTick example
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file CORTEXM/CORTEXM_SysTick/readme.txt
* @author MCD Application Team
* @brief Description of the CortexM SysTick example.
******************************************************************************
*
* Copyright (c) 2017 STMicroelectronics. All rights reserved.
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
@endverbatim
@par Example Description
This example shows how to use the default SysTick configuration with a 1 ms timebase
to toggle LEDs.
A "HAL_Delay" function is implemented based on the SysTick end-of-count event.
Four LEDs are toggled with a timing defined by the HAL_Delay function.
@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 need to ensure that the SysTick time base is always set to 1 millisecond
to have correct HAL operation.
@par Keywords
System, Cortex, Time base, Systick, HCLK
@par Directory contents
- CortexM/CORTEXM_SysTick/Inc/stm32f4xx_hal_conf.h HAL configuration file
- CortexM/CORTEXM_SysTick/Inc/stm32f4xx_it.h Interrupt handlers header file
- CortexM/CORTEXM_SysTick/Inc/main.h Header for main.c module
- CortexM/CORTEXM_SysTick/Src/stm32f4xx_it.c Interrupt handlers
- CortexM/CORTEXM_SysTick/Src/main.c Main program
- CortexM/CORTEXM_SysTick/Src/system_stm32f4xx.c STM32F4xx system source file
@par Hardware and Software environment
- This example runs on STM32F412xG devices.
- This example has been tested with STM32412G-DISCOVERY board 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
* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
*/
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