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103 lines
5.4 KiB
Plaintext
103 lines
5.4 KiB
Plaintext
/**
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@page FreeRTOS_ThreadCreation FreeRTOS Thread Creation example
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@verbatim
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******************************************************************************
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* @file FreeRTOS/FreeRTOS_ThreadCreation/readme.txt
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* @author MCD Application Team
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* @brief Description of the FreeRTOS Thread Creation example.
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******************************************************************************
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*
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* Copyright (c) 2016 STMicroelectronics International N.V. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted, provided that the following conditions are met:
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*
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* 1. Redistribution 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 other
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* contributors to this software may be used to endorse or promote products
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* derived from this software without specific written permission.
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* 4. This software, including modifications and/or derivative works of this
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* software, must execute solely and exclusively on microcontroller or
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* microprocessor devices manufactured by or for STMicroelectronics.
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* 5. Redistribution and use of this software other than as permitted under
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* this license is void and will automatically terminate your rights under
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* this license.
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*
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* THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
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* RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
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* SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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@endverbatim
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@par Application Description
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This application shows how to implement thread creation using CMSIS RTOS API.
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This example creates two threads with the same priority, which execute in
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a periodic cycle of 5 seconds for Thread 1 and 10 seconds for Thread 2.
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Thread 1 toggles LED2 every 250 milliseconds for 5 seconds then resumes Thread 2
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and suspends itself. Thread 2 resumes and toggles LED2 every 500 milliseconds
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for 10 seconds, then Thread 2 resumes Thread 1 and suspends itself.
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@note Care must be taken when using HAL_Delay(), this function provides accurate
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delay (in milliseconds) based on variable incremented in HAL time base ISR.
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This implies that if HAL_Delay() is called from a peripheral ISR process, then
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the HAL time base interrupt must have higher priority (numerically lower) than
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the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the HAL time base interrupt priority you have to use HAL_NVIC_SetPriority()
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function.
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@note The application needs to ensure that the HAL time base is always set to 1 millisecond
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to have correct HAL operation.
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@note The FreeRTOS heap size configTOTAL_HEAP_SIZE defined in FreeRTOSConfig.h is set accordingly to the
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OS resources memory requirements of the application with +10% margin and rounded to the upper Kbyte boundary.
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For more details about FreeRTOS implementation on STM32Cube, please refer to UM1722 "Developing Applications
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on STM32Cube with RTOS".
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@par Directory contents
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- FreeRTOS/FreeRTOS_ThreadCreation/Src/main.c Main program
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- FreeRTOS/FreeRTOS_ThreadCreation/Src/stm32f0xx_hal_timebase_tim.c HAL timebase file
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- FreeRTOS/FreeRTOS_ThreadCreation/Src/stm32f0xx_it.c Interrupt handlers
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- FreeRTOS/FreeRTOS_ThreadCreation/Src/system_stm32f0xx.c STM32F0xx system clock configuration file
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- FreeRTOS/FreeRTOS_ThreadCreation/Inc/main.h Main program header file
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- FreeRTOS/FreeRTOS_ThreadCreation/Inc/stm32f0xx_hal_conf.h HAL Library Configuration file
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- FreeRTOS/FreeRTOS_ThreadCreation/Inc/stm32f0xx_it.h Interrupt handlers header file
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- FreeRTOS/FreeRTOS_ThreadCreation/Inc/FreeRTOSConfig.h FreeRTOS Configuration file
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@par Hardware and Software environment
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- This example runs on STM32F072xB devices.
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- This example has been tested with STM32F072RB-Nucleo RevC board and can be
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easily tailored to any other supported device 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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* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
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*/
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