# FreeRTOS-Wrapper **Repository Path**: RT-Thread-Mirror/FreeRTOS-Wrapper ## Basic Information - **Project Name**: FreeRTOS-Wrapper - **Description**: No description available - **Primary Language**: Unknown - **License**: Not specified - **Default Branch**: master - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 0 - **Forks**: 3 - **Created**: 2022-07-26 - **Last Updated**: 2025-06-10 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README # RT-Thread操作系统的FreeRTOS兼容层 ## FreeRTOS Application Compatibility Layer (ACL) for RT-Thread ## 让基于FreeRTOS开发的应用层无感地迁移到RT-Thread操作系统 中文 | [English](readme.md) ## 1 概述 这是一个针对RT-Thread国产操作系统的FreeRTOS操作系统兼容层，可以让原有基于FreeRTOS操作系统的项目快速、无感地迁移到RT-Thread操作系统上，实现在RT-Thread操作系统上无感的使用FreeRTOS的API，同时可以使用RT-Thread的丰富组件。项目基于FreeRTOS V10.4.6版本。目前已经支撑多款基于FreeRTOS编写的SDK落地RT-Thread。 ### 1.1 RT-Thread的其他RTOS兼容层 - RT-Thread操作系统的μCOS-III兼容层：https://github.com/mysterywolf/RT-Thread-wrapper-of-uCOS-III - RT-Thread操作系统的μCOS-II兼容层：https://github.com/mysterywolf/RT-Thread-wrapper-of-uCOS-II - RT-Thread操作系统的RTX(即CMSIS-RTOS1)兼容层：https://github.com/RT-Thread-packages/CMSIS_RTOS1 - RT-Thread操作系统的RTX5(即CMSIS-RTOS2)兼容层：https://github.com/RT-Thread-packages/CMSIS_RTOS2 - RT-Thread操作系统的Arduino生态兼容层：https://github.com/RTduino/RTduino ## 2 FreeRTOS的API支持情况 兼容层对FreeRTOS API的支持情况如下： ### 2.1 任务控制 - [x] xTaskCreate - [x] xTaskCreateStatic - [ ] [xTaskCreateRestrictedStatic](https://www.freertos.org/xtaskcreaterestrictedstaticfreertos-mpu-specific.html) - [x] vTaskDelete - [x] vTaskDelay - [x] vTaskDelayUntil - [x] xTaskDelayUntil - [x] uxTaskPriorityGet - [x] vTaskPrioritySet - [x] vTaskSuspend (只支持挂起当前线程) - [x] vTaskResume - [x] xTaskResumeFromISR - [x] xTaskAbortDelay - [ ] [uxTaskGetSystemState](https://www.freertos.org/uxTaskGetSystemState.html) - [ ] [vTaskGetInfo](https://www.freertos.org/vTaskGetInfo.html) - [ ] [vTaskList](https://www.freertos.org/a00021.html#vTaskList) - [ ] [vTaskGetRunTimeStats](https://www.freertos.org/a00021.html#vTaskGetRunTimeStats) - [ ] [vTaskStartTrace](https://www.freertos.org/a00021.html#vTaskStartTrace) - [ ] [ulTaskEndTrace](https://www.freertos.org/a00021.html#usTaskEndTrace) - [ ] [SetThreadLocalStoragePointer](https://www.freertos.org/vTaskSetThreadLocalStoragePointer.html) - [ ] [GetThreadLocalStoragePointer](https://www.freertos.org/pvTaskGetThreadLocalStoragePointer.html) - [x] xTaskGetApplicationTaskTag - [x] xTaskGetCurrentTaskHandle - [x] xTaskGetIdleTaskHandle - [x] uxTaskGetStackHighWaterMark - [x] eTaskGetState - [x] pcTaskGetName - [x] xTaskGetTickCount - [x] xTaskGetTickCountFromISR - [x] xTaskGetSchedulerState - [x] uxTaskGetNumberOfTasks - [x] vTaskSetApplicationTaskTag - [x] xTaskCallApplicationTaskTag - [x] vTaskSetTimeoutState - [x] xTaskGetCheckForTimeout ### 2.2 内核控制 - [x] [taskYIELD](https://www.freertos.org/a00020.html#taskYIELD) - [x] [taskENTER_CRITICAL](https://www.freertos.org/taskENTER_CRITICAL_taskEXIT_CRITICAL.html) - [x] [taskEXIT_CRITICAL](https://www.freertos.org/taskENTER_CRITICAL_taskEXIT_CRITICAL.html) - [x] [taskENTER_CRITICAL_FROM_ISR](https://www.freertos.org/taskENTER_CRITICAL_FROM_ISR_taskEXIT_CRITICAL_FROM_ISR.html) - [x] [taskEXIT_CRITICAL_FROM_ISR](https://www.freertos.org/taskENTER_CRITICAL_FROM_ISR_taskEXIT_CRITICAL_FROM_ISR.html) - [x] [taskDISABLE_INTERRUPTS](https://www.freertos.org/a00020.html#taskDISABLE_INTERRUPTS) - [x] [taskENABLE_INTERRUPTS](https://www.freertos.org/a00020.html#taskENABLE_INTERRUPTS) - [x] [vTaskStartScheduler](https://www.freertos.org/a00132.html) - [x] [vTaskEndScheduler](https://www.freertos.org/a00133.html) - [x] [vTaskSuspendAll](https://www.freertos.org/a00134.html) - [x] [xTaskResumeAll](https://www.freertos.org/a00135.html) - [ ] [vTaskStepTick](https://www.freertos.org/vTaskStepTick.html) - [ ] [xTaskCatchUpTicks](https://www.freertos.org/xTaskCatchUpTicks.html) ### 2.3 任务通知 - [x] [xTaskNotifyGive](https://www.freertos.org/xTaskNotifyGive.html) - [x] [vTaskNotifyGiveFromISR](https://www.freertos.org/vTaskNotifyGiveFromISR.html) - [x] [ulTaskNotifyTake](https://www.freertos.org/ulTaskNotifyTake.html) - [x] [xTaskNotify](https://www.freertos.org/xTaskNotify.html) - [x] [xTaskNotifyAndQuery](https://www.freertos.org/xTaskNotifyAndQuery.html) - [x] [xTaskNotifyAndQueryFromISR](https://www.freertos.org/xTaskNotifyAndQueryFromISR.html) - [x] [xTaskNotifyFromISR](https://www.freertos.org/xTaskNotifyFromISR.html) - [x] [xTaskNotifyWait](https://www.freertos.org/xTaskNotifyWait.html) - [x] [xTaskNotifyStateClear](https://www.freertos.org/xTaskNotifyStateClear.html) - [x] [ulTaskNotifyValueClear](https://www.freertos.org/ulTasknotifyValueClear.html) ### 2.4 消息队列 - [x] [xQueueCreate](https://www.freertos.org/a00116.html) - [x] [xQueueCreateStatic](https://www.freertos.org/xQueueCreateStatic.html) - [x] [vQueueDelete](https://www.freertos.org/a00018.html#vQueueDelete) - [x] [xQueueSend](https://www.freertos.org/a00117.html) - [x] [xQueueSendFromISR](https://www.freertos.org/a00119.html) - [x] [xQueueSendToBack](https://www.freertos.org/xQueueSendToBack.html) - [x] [xQueueSendToBackFromISR](https://www.freertos.org/xQueueSendToBackFromISR.html) - [x] [xQueueSendToFront](https://www.freertos.org/xQueueSendToFront.html) (不支持设置超时) - [x] [xQueueSendToFrontFromISR](https://www.freertos.org/xQueueSendToFrontFromISR.html) - [x] [xQueueReceive](https://www.freertos.org/a00118.html) - [x] [xQueueReceiveFromISR](https://www.freertos.org/a00120.html) - [x] [uxQueueMessagesWaiting](https://www.freertos.org/a00018.html#ucQueueMessagesWaiting) - [x] [uxQueueMessagesWaitingFromISR](https://www.freertos.org/a00018.html#ucQueueMessagesWaitingFromISR) - [x] [uxQueueSpacesAvailable](https://www.freertos.org/a00018.html#uxQueueSpacesAvailable) - [x] [xQueueReset](https://www.freertos.org/a00018.html#xQueueReset) - [ ] [xQueueOverwrite](https://www.freertos.org/xQueueOverwrite.html) - [ ] [xQueueOverwriteFromISR](https://www.freertos.org/xQueueOverwriteFromISR.html) - [ ] [xQueuePeek](https://www.freertos.org/xQueuePeek.html) - [ ] [xQueuePeekFromISR](https://www.freertos.org/xQueuePeekFromISR.html) - [x] [xQueueIsQueueFullFromISR](https://www.freertos.org/a00018.html#xQueueIsQueueFullFromISR) - [x] [xQueueIsQueueEmptyFromISR](https://www.freertos.org/a00018.html#xQueueIsQueueEmptyFromISR) - [ ] [vQueueAddToRegistry](https://www.freertos.org/vQueueAddToRegistry.html) - [ ] [vQueueUnregisterQueue](https://www.freertos.org/vQueueUnregisterQueue.html) - [ ] [pcQueueGetName](https://www.freertos.org/pcQueueGetName.html) ### 2.5 信号量/互斥量 - [x] [xSemaphoreCreateBinary](https://www.freertos.org/xSemaphoreCreateBinary.html) - [x] [xSemaphoreCreateBinaryStatic](https://www.freertos.org/xSemaphoreCreateBinaryStatic.html) - [x] [vSemaphoreCreateBinary](https://www.freertos.org/a00121.html) - [x] [xSemaphoreCreateCounting](https://www.freertos.org/CreateCounting.html) - [x] [xSemaphoreCreateCountingStatic](https://www.freertos.org/xSemaphoreCreateCountingStatic.html) - [x] [xSemaphoreCreateMutex](https://www.freertos.org/CreateMutex.html) - [x] [xSemaphoreCreateMutexStatic](https://www.freertos.org/xSemaphoreCreateMutexStatic.html) - [x] [xSem'CreateRecursiveMutex](https://www.freertos.org/xSemaphoreCreateRecursiveMutex.html) - [x] [xSem'CreateRecursiveMutexStatic](https://www.freertos.org/xSemaphoreCreateRecursiveMutexStatic.html) - [x] [vSemaphoreDelete](https://www.freertos.org/a00113.html#vSemaphoreDelete) - [x] [xSemaphoreGetMutexHolder](https://www.freertos.org/xSemaphoreGetMutexHolder.html) - [x] [uxSemaphoreGetCount](https://www.freertos.org/uxSemaphoreGetCount.html) - [x] [xSemaphoreTake](https://www.freertos.org/a00122.html) - [x] [xSemaphoreTakeFromISR](https://www.freertos.org/xSemaphoreTakeFromISR.html) - [x] [xSemaphoreTakeRecursive](https://www.freertos.org/xSemaphoreTakeRecursive.html) - [x] [xSemaphoreGive](https://www.freertos.org/a00123.html) - [x] [xSemaphoreGiveRecursive](https://www.freertos.org/xSemaphoreGiveRecursive.html) - [x] [xSemaphoreGiveFromISR](https://www.freertos.org/a00124.html) ### 2.6 定时器 - [x] [xTimerCreate](https://www.freertos.org/FreeRTOS-timers-xTimerCreate.html) - [x] [xTimerCreateStatic](https://www.freertos.org/xTimerCreateStatic.html) - [x] [xTimerIsTimerActive](https://www.freertos.org/FreeRTOS-timers-xTimerIsTimerActive.html) - [x] [xTimerStart](https://www.freertos.org/FreeRTOS-timers-xTimerStart.html) - [x] [xTimerStop](https://www.freertos.org/FreeRTOS-timers-xTimerStop.html) - [x] [xTimerChangePeriod](https://www.freertos.org/FreeRTOS-timers-xTimerChangePeriod.html) - [x] [xTimerDelete](https://www.freertos.org/FreeRTOS-timers-xTimerDelete.html) - [x] [xTimerReset](https://www.freertos.org/FreeRTOS-timers-xTimerReset.html) - [x] [xTimerStartFromISR](https://www.freertos.org/FreeRTOS-timers-xTimerStartFromISR.html) - [x] [xTimerStopFromISR](https://www.freertos.org/FreeRTOS-timers-xTimerStopFromISR.html) - [x] [xTimerChangePeriodFromISR](https://www.freertos.org/FreeRTOS-timers-xTimerChangePeriodFromISR.html) - [x] [xTimerResetFromISR](https://www.freertos.org/FreeRTOS-timers-xTimerResetFromISR.html) - [x] [pvTimerGetTimerID](https://www.freertos.org/FreeRTOS-timers-pvTimerGetTimerID.html) - [x] [vTimerSetReloadMode](https://www.freertos.org/FreeRTOS-Timers-vTimerSetReloadMode.html) - [x] [vTimerSetTimerID](https://www.freertos.org/FreeRTOS-timers-vTimerSetTimerID.html) - [x] [xTimerGetTimerDaemonTaskHandle](https://www.freertos.org/FreeRTOS-Software-Timer-API-Functions.html#xTimerGetTimerDaemonTaskHandle) - [ ] [xTimerPendFunctionCall](https://www.freertos.org/xTimerPendFunctionCall.html) - [ ] [xTimerPendFunctionCallFromISR](https://www.freertos.org/xTimerPendFunctionCallFromISR.html) - [x] [pcTimerGetName](https://www.freertos.org/FreeRTOS-timers-pcTimerGetName.html) - [x] [xTimerGetPeriod](https://www.freertos.org/FreeRTOS-timers-xTimerGetPeriod.html) - [x] [xTimerGetExpiryTime](https://www.freertos.org/FreeRTOS-timers-xTimerGetExpiryTime.html) - [x] [uxTimerGetReloadMode](https://www.freertos.org/uxTimerGetReloadMode.html) ### 2.7 事件集 - [x] [xEventGroupCreate](https://www.freertos.org/xEventGroupCreate.html) - [x] [xEventGroupCreateStatic](https://www.freertos.org/xEventGroupCreateStatic.html) - [x] [vEventGroupDelete](https://www.freertos.org/vEventGroupDelete.html) - [x] [xEventGroupWaitBits](https://www.freertos.org/xEventGroupWaitBits.html) - [x] [xEventGroupSetBits](https://www.freertos.org/xEventGroupSetBits.html) - [x] [xEventGroupSetBitsFromISR](https://www.freertos.org/xEventGroupSetBitsFromISR.html) - [x] [xEventGroupClearBits](https://www.freertos.org/xEventGroupClearBits.html) - [x] [xEventGroupClearBitsFromISR](https://www.freertos.org/xEventGroupClearBitsFromISR.html) - [x] [xEventGroupGetBits](https://www.freertos.org/xEventGroupGetBits.html) - [x] [xEventGroupGetBitsFromISR](https://www.freertos.org/xEventGroupGetBitsFromISR.html) - [ ] [xEventGroupSync](https://www.freertos.org/xEventGroupSync.html) ### 2.8 不支持的功能 - [ ] [消息队列集](https://www.freertos.org/RTOS-queue-sets.html) - [ ] [流缓冲区](https://www.freertos.org/RTOS-stream-buffer-API.html) - [ ] [消息缓冲区](https://www.freertos.org/RTOS-message-buffer-API.html) - [ ] [MPU](https://www.freertos.org/FreeRTOS-MPU-specific.html) - [ ] [协程](https://www.freertos.org/croutineapi.html) - [ ] [钩子函数](https://www.freertos.org/a00016.html) - [ ] [跟踪功能](https://www.freertos.org/rtos-trace-macros.html) ## 3 使用注意事项 一些函数在功能和使用方法上和FreeRTOS略有不同，在迁移过程中需要注意。 ### 3.1线程、消息队列与互斥量 #### 3.1.1 vTaskSuspend `vTaskSuspend`只支持挂起当前运行的线程，在使用时`xTaskToSuspend`参数必须为`NULL`。否则会触发断言。 #### 3.1.2 xQueueSendToFront `xQueueSendToFront`不支持设置超时，使用时`xTicksToWait`参数会被忽略，消息队列没有空间时会立即返回`errQUEUE_FULL`。 #### 3.1.3 xQueueCreateStatic 静态消息队列需要参考以下的例子创建，确保为消息队列分配的内存足够大： ```c #define QUEUE_LENGTH 10 #define ITEM_SIZE sizeof( uint32_t ) /* 以下是在原版FreeRTOS分配内存的方法，由于RT-Thread消息队列内部的实现与FreeRTOS不同，这样分配的内存不够存放QUEUE_LENGTH个消息 */ //uint8_t ucQueueStorage[ QUEUE_LENGTH * ITEM_SIZE ]; /* 要使用QUEUE_BUFFER_SIZE宏分配内存 */ uint8_t ucQueueStorage[ QUEUE_BUFFER_SIZE(QUEUE_LENGTH, ITEM_SIZE)]; StaticQueue_t xQueueBuffer; QueueHandle_t xQueue1; xQueue1 = xQueueCreate( QUEUE_LENGTH, ITEM_SIZE, &( ucQueueStorage[ 0 ] ), &xQueueBuffer ); ``` #### 3.1.4 Mutex和Recursive Mutex FreeRTOS提供了两种互斥量，Mutex和Recursive Mutex。Recursive Mutex可以由同一个线程重复获取，Mutex不可以。RT-Thread提供的互斥量是可以重复获取的，因此兼容层也不对Mutex和Recursive Mutex做区分。用`xSemaphoreCreateMutex`和`xSemaphoreCreateRecursiveMutex`创建的互斥量都是可以重复获取的。 ### 3.2 定时器 和FreeRTOS不同，RT-Thread不使用一个消息队列向定时器线程传递命令。使用兼容层时任何需要设置超时的定时器函数，如`xTimerStart( xTimer, xTicksToWait )`，`xTicksToWait`参数会被忽略，函数会立即完成命令并返回。 ### 3.3 FromISR函数 FreeRTOS为一些函数提供了在中断中使用的FromISR版本，如果这些函数唤醒了更高优先级的线程，需要手动调度，如下所示： ```c BaseType_t xHigherPrioritTaskWoken = pdFALSE; xQueueSendToFrontFromISR( xRxQueue, &cIn, &xHigherPriorityTaskWoken ); if( xHigherPriorityTaskWoken ) { taskYIELD (); } ``` RT-Thread不为函数提供FromISR版本，函数可以在中断调用并在内部完成调度。因此在兼容层中使用FromISR函数后不需要手动调度，`xHigherPriorityTaskWoken`总会被设置成`pdFALSE`。 ### 3.4 内存堆 兼容层保留了FreeRTOS的五种内存分配算法，默认使用`heap_3`，`pvPortMalloc/vPortFree`内部调用`RT_KERNEL_MALLOC/RT_KERNEL_FREE`在RT-Thread内部的内存堆分配。这种情况下内存堆的大小由RT-Thread BSP配置决定，无法在`FreeRTOSConfig.h`中通过`configTOTAL_HEAP_SIZE`设置。 若使用其他算法，需要修改`FreeRTOS/sSConscript`，选择相应的源文件 ```c #可将heap_3.c替换成heap_1.c等 src += Glob(os.path.join("portable", "MemMang", "heap_3.c")) ``` 在`FreeRTOS/portable/rt-thread/FreeRTOSConfig.h`中通过`configTOTAL_HEAP_SIZE`设置内存堆大小。应用调用`pvPortMalloc/vPortFree`会在一块独立于RT-Thread，大小为`configTOTAL_HEAP_SIZE`的内存堆中分配，RT-Thread内部的内存堆仍然存在，兼容层函数内部分配内存都在RT-Thread的内存堆完成。 ### 3.5 线程优先级 RT-Thread线程优先级数值越小时优先级越高，而FreeRTOS线程优先级数值越大优先级越高。在使用兼容层的FreeRTOS API，如`xTaskCreate`，使用FreeRTOS的规则为线程指定优先级即可。若在应用中将RT-Thread和FreeRTOS API混合使用，在指定线程优先级时要特别注意。可以使用以下两个宏对RT-Thread和FreeRTOS线程优先级做转换： ```c #define FREERTOS_PRIORITY_TO_RTTHREAD(priority) ( configMAX_PRIORITIES - 1 - ( priority ) ) #define RTTHREAD_PRIORITY_TO_FREERTOS(priority) ( RT_THREAD_PRIORITY_MAX - 1 - ( priority ) ) ``` ### 3.6 线程堆栈大小 FreeRTOS线程堆栈大小的单位为`sizeof(StackType_t)`，RT-Thread线程堆栈大小为`sizeof(rt_uint8_t)`。使用FreeRTOS API创建线程时一定要遵守FreeRTOS的规则，切勿混淆。 ### 3.7 vTaskStartScheduler 由于RT-Thread和FreeRTOS的内核启动流程不同，使用兼容层时，`main`函数是在一个线程中运行，该线程优先级为`CONFIG_RT_MAIN_THREAD_PRIORITY`。（此选项通过SCons配置，数值越小优先级越高。），此时调度器已经开启。一般的FreeRTOS应用采用以下的方式创建线程： ```c xTaskCreate(pxTask1Code, ......); xTaskCreate(pxTask2Code, ......); ...... vTaskStartScheduler(); ``` 使用兼容层时，任何使用`xTaskCreate`创建的线程若优先级比`CONFIG_RT_MAIN_THREAD_PRIORITY`更高，会立即开始执行。`vTaskStartScheduler`只是为了提供对应用的兼容，没有任何实际效果。在使用兼容层时，创建线程要特别注意，确保在调用`xTaskCreate`时，该线程所需的所有资源已经完成初始化，可以正常运行。 ## 4 使用方法 通过Env工具或RT-Thread Studio将FreeRTOS兼容层加入到工程中： ```shell RT-Thread online packages system packages ---> [*] FreeRTOS Wrapper ---> Version (latest) ``` 以下选项会影响到FreeRTOS兼容层： ```c RT_USING_TIMER_SOFT /* 使用FreeRTOS定时器时必须开启*/ RT_TIMER_THREAD_PRIO /* 定时器线程优先级。与FreeRTOS相反，该选项数值越小优先级越高 */ RT_TIMER_THREAD_STACK_SIZE /* 定时器线程栈大小，单位为sizeof(rt_uint8_t) */ RT_USING_MUTEX /* 使用FreeRTOS互斥量时必须开启*/ RT_USING_SEMAPHORE /* 使用FreeRTOS信号量时必须开启*/ RT_USING_HEAP /* 使用FreeRTOS动态内存分配时必须开启*/ RT_TICK_PER_SECOND /* 相当于FreeRTOS configTICK_RATE_HZ */ RT_THREAD_PRIORITY_MAX /* 相当于FreeRTOS configMAX_PRIORITIES */ RT_NAME_MAX /* 相当于FreeRTOS configMAX_TASK_NAME_LEN */ ``` 在`FreeRTOS/portable/rt-thread`提供了`FreeRTOSConfig.h`模版。大部分内容不可以修改或依赖RT-Thread内核的配置，可以手动修改的内容如下： ```c /* 可以选择不使用recursive mutex */ #ifdef RT_USING_MUTEX #define configUSE_RECURSIVE_MUTEXES 1 #define configUSE_MUTEXES 1 #endif /* 可以选择不使用counting semaphore */ #ifdef RT_USING_SEMAPHORE #define configUSE_COUNTING_SEMAPHORES 1 #endif /* 若不使用heap_3，可以通过configTOTAL_HEAP_SIZE配置内存堆大小 */ #define configSUPPORT_STATIC_ALLOCATION 1 #ifdef RT_USING_HEAP #define configSUPPORT_DYNAMIC_ALLOCATION 1 #define configTOTAL_HEAP_SIZE 10240 #define configAPPLICATION_ALLOCATED_HEAP 0 #endif #define configMINIMAL_STACK_SIZE 128 /* 可以选择的函数和功能 */ #define INCLUDE_vTaskPrioritySet 1 #define INCLUDE_uxTaskPriorityGet 1 #define INCLUDE_vTaskDelete 1 #define INCLUDE_vTaskSuspend 1 #define INCLUDE_xTaskDelayUntil 1 #define INCLUDE_vTaskDelay 1 #define INCLUDE_xTaskGetIdleTaskHandle 1 #define INCLUDE_xTaskAbortDelay 1 #define INCLUDE_xSemaphoreGetMutexHolder 1 #define INCLUDE_xTaskGetHandle 1 #define INCLUDE_uxTaskGetStackHighWaterMark 1 #define INCLUDE_uxTaskGetStackHighWaterMark2 1 #define INCLUDE_eTaskGetState 1 #define INCLUDE_xTaskResumeFromISR 1 #define INCLUDE_xTaskGetSchedulerState 1 #define INCLUDE_xTaskGetCurrentTaskHandle 1 #define configUSE_APPLICATION_TASK_TAG 1 #define configUSE_TASK_NOTIFICATIONS 1 #define configTASK_NOTIFICATION_ARRAY_ENTRIES 3 ``` 在`test`目录下提供了一些例程，可以将它们加入BSP目录下的`applications`文件夹中。使用SCons编译并烧录后，可以连接串口，输入相应的msh命令，观察例程的执行结果： ```shell msh />queue_dynamic Task 1 receive data 0 from queue Task 1 receive data 1 from queue Task 1 receive data 2 from queue Task 1 receive data 3 from queue Task 1 receive data 4 from queue Task 1 receive data 5 from queue Task 1 receive data 6 from queue Task 1 receive data 7 from queue Task 1 receive data 8 from queue Task 1 receive data 9 from queue Task 1 receive data 10 from queue ``` ## 5 注意事项 & 补充说明 1、该版本`FreeRTOS`由乐鑫公司的`esp-idf`库中迁移而来，部分函数需要根据芯片来实现，如出现编译问题可参考[bsp/ESP32_C3](https://github.com/RT-Thread/rt-thread/tree/master/bsp/ESP32_C3)和[RT-Thread-packages/esp-idf](https://github.com/RT-Thread-packages/esp-idf/tree/master/components/freertos/FreeRTOS-Kernel)。 2、在`menuconfig`页面中可以开启`PKG_FREERTOS_USING_CONFIG_H`宏定义，该宏定义允许用户自定义相关`freertos`配置，具体使用案例可以参考[bsp/ESP32_C3/idf_port/include/freertos/FreeRTOSConfig.h](https://github.com/RT-Thread/rt-thread/blob/master/bsp/ESP32_C3/idf_port/include/freertos/FreeRTOSConfig.h)，注意只有部分配置宏定义可以被覆盖，详见`FreeRTOS/include/freertos/FreeRTOS.h`。 ## 6 参考资料 RT-Thread文档 [https://www.rt-thread.org/document/site/#/rt-thread-version/rt-thread-standard/README](https://www.rt-thread.org/document/site/#/rt-thread-version/rt-thread-standard/README) FreeRTOS文档 [https://www.freertos.org/a00106.html](https://www.freertos.org/a00106.html) ## 7 维护 主页：https://github.com/RT-Thread-packages/FreeRTOS-Wrapper 维护：[唐照洲](https://github.com/tangzz98)