91 lines
3.9 KiB
Plaintext
91 lines
3.9 KiB
Plaintext
/**
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@page FreeRTOS_ThreadFlags FreeRTOS Thread Flags example
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@verbatim
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******************************************************************************
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* @file FreeRTOS/FreeRTOS_ThreadFlags/readme.txt
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* @author MCD Application Team
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* @brief Description of the FreeRTOS Thread Flags example.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2020 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 Application Description
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How to use thread flags with CMSIS_RTOS2 API.
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This application creates three threads.
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+ A "GenThread" that :
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- Waits 500ms before setting the thread flags for the first Rx thread (using osThreadFlagsSet () ).
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- Waits 500ms before setting the thread flags for the second Rx thread (using osThreadFlagsSet () ).
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+ A "RxThread1" which waits for the thread flags setting (using osThreadFlagsWait() ) before setting
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on the LED1.
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+ A "RxThread2" which waits for the thread flags setting (using osThreadFlagsGet() ) before setting
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off the LED1 and clearing the thread flags (using osThreadFlagsClear() ).
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Observed behaviour:
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- Each 500ms, the LED1 is toggling.
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- The LED3 is on if any error occurs.
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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 Keywords
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RTOS, FreeRTOS, Threading, ThreadFlags
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@par Directory contents
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- FreeRTOS/FreeRTOS_ThreadFlags/Src/app_freertos.c FreeRTOS application file
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- FreeRTOS/FreeRTOS_ThreadFlags/Src/main.c Main program
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- FreeRTOS/FreeRTOS_ThreadFlags/Src/stm32wlxx_hal_timebase_tim.c HAL timebase file
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- FreeRTOS/FreeRTOS_ThreadFlags/Src/stm32wlxx_it.c Interrupt handlers
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- FreeRTOS/FreeRTOS_ThreadFlags/Src/system_stm32wlxx.c STM32WLxx system clock configuration file
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- FreeRTOS/FreeRTOS_ThreadFlags/Inc/main.h Main program header file
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- FreeRTOS/FreeRTOS_ThreadFlags/Inc/stm32wlxx_hal_conf.h HAL Library Configuration file
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- FreeRTOS/FreeRTOS_ThreadFlags/Inc/stm32wlxx_it.h Interrupt handlers header file
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- FreeRTOS/FreeRTOS_ThreadFlags/Inc/FreeRTOSConfig.h FreeRTOS Configuration file
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@par Hardware and Software environment
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- This application runs on STM32WL55JCIx devices.
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- This application has been tested with NUCLEO-WL55JC 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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*/
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