FreeRTOS入门指南:中文实战详解

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《FreeRTOS入门手册(中文版)》是一份详细介绍了如何使用FreeRTOS,一个专门为微控制器设计的免费实时操作系统内核的实用指南。该手册由Richard Barry在2009年编写,版权严格禁止任何形式的分发或出版。文章来源于www.FreeRTOS.net,作者Zou Changjun在阅读英文原版的基础上进行了翻译,旨在帮助国内用户理解和使用FreeRTOS,尤其是在寻找低成本、高性能实时任务解决方案的场景下。 FreeRTOS的核心在于其任务管理机制,该手册的第一章即深入探讨了这一主题。它涵盖了如何创建、调度和管理任务,包括任务的创建函数、任务优先级设定、任务调度算法以及任务间的同步与通信。FreeRTOS的优势在于它的轻量级设计,能够在资源受限的微控制器环境中高效运行,支持抢占式调度,确保了实时性。 手册还强调了FreeRTOS对于微控制器开发的重要性,尤其是在嵌入式系统中,实时性能是关键因素。它适合于那些对代码体积、响应速度和能源效率有高要求的应用,例如物联网设备、工业控制、汽车电子等。FreeRTOS通过提供内核级的任务管理,简化了开发者在多任务环境下的编程工作,减少了代码复杂性。 值得注意的是,虽然作者Zou Changjun承诺会在业余时间逐步完成翻译,并愿意将最终成果分享在FreeRTOS中文网上,但读者需明确,由于作者个人时间有限,可能未涵盖所有附录内容,且翻译过程中可能存在疏漏,因此在阅读时需自行核实信息并理解可能存在的一些不足。如果遇到问题,可以直接联系作者或访问官方网站寻求帮助。 《FreeRTOS入门手册(中文版)》为初次接触FreeRTOS的开发者提供了一个实用的学习平台,它详细介绍了如何在实际项目中运用这一强大的工具,对于提高嵌入式系统的开发效率和性能具有重要价值。
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中文的参考手册 内容 Contents5..................................................................................................................................................... 列表 Figures8............................................................................................................................................... 代码清单 Listings9....................................................................................................................................... Tables15 名单.............................................................................................................................................. 列表 Notation15........................................................................................................................................... 章节 1 关于这............................................................................................................................. Manual16 1.1Scope17............................................................................................................................................. 章节 2Task 和调度........................................................................................................................... API20 2.1 portSWITCH_TO_USER_MODE() 21.................................................................................. 2.2 vTaskAllocateMPURegions() 22........................................................................................... 2.3 xTaskAbortDelay() 25............................................................................................................. 2.4 xTaskCallApplicationTaskHook() 27.................................................................................... 2.5 xTaskCheckForTimeOut() 30................................................................................................ 2.6 xTaskCreate() 32..................................................................................................................... 2.7 xTaskCreateStatic() 37........................................................................................................... 2.8 xTaskCreateRestricted() 41................................................................................................... 2.9 vTaskDelay() 46....................................................................................................................... 2.10 vTaskDelayUntil() 48............................................................................................................... 2.11 vTaskDelete() 51..................................................................................................................... 2.12 taskDISABLE_INTERRUPTS() 53........................................................................................ 2.13 taskENABLE_INTERRUPTS() 55......................................................................................... 2.14 taskENTER_CRITICAL() 56.................................................................................................. 2.15 taskENTER_CRITICAL_FROM_ISR() 59........................................................................... 2.16 taskEXIT_CRITICAL() 61....................................................................................................... 2.1 taskEXIT_CRITICAL_FROM_ISR() 63................................................................................ 2.2 xTaskGetApplicationTaskTag() 65....................................................................................... 2.3 xTaskGetCurrentTaskHandle() 67........................................................................................ 2.4 xTaskGetIdleTaskHandle() 68............................................................................................... 2.1 xTaskGetHandle() 69.............................................................................................................. 2.2 uxTaskGetNumberOfTasks() 71........................................................................................... 2.3 vTaskGetRunTimeStats() 72................................................................................................. 2.4 xTaskGetSchedulerState() 76...............................................................................................六 2.5 uxTaskGetStackHighWaterMark() 77.................................................................................. 2.6 eTaskGetState() 79................................................................................................................. 2.7 uxTaskGetSystemState() 81.................................................................................................. 2.8 vTaskGetTaskInfo() 85........................................................................................................... 2.9 pvTaskGetThreadLocalStoragePointer() 87.......................................................................7 2.10 pcTaskGetName() 89.............................................................................................................. 2.11 xTaskGetTickCount() 90........................................................................................................ 2.12 xTaskGetTickCountFromISR() 92........................................................................................ 2.13 vTaskList() 94........................................................................................................................... 2.14 xTaskNotify() 97....................................................................................................................... 2.15 xTaskNotifyAndQuery() 100.................................................................................................. 2.16 xTaskNotifyAndQueryFromISR() 104.................................................................................. 2.17 xTaskNotifyFromISR() 108.................................................................................................... 2.18 xTaskNotifyGive() 113............................................................................................................ 2.19 vTaskNotifyGiveFromISR() 116............................................................................................ 2.20 xTaskNotifyStateClear() 119.................................................................................................. 2.21 ulTask​ ​ NotifyTake() 121.................................................................................................. 2.22 xTaskNotifyWait() 124............................................................................................................ 2.23 uxTaskPriorityGet() 127.......................................................................................................... 2.24 vTaskPrioritySet() 129............................................................................................................ 2.25 vTaskResume() 131................................................................................................................ 2.26 xTaskResumeAll() 133........................................................................................................... 2.27 xTaskResumeFromISR() 136................................................................................................ 2.28 vTaskSetApplicationTaskTag() 139...................................................................................... 2.29 vTaskSetThreadLocalStoragePointer() 141........................................................................ 2.30 vTaskSetTimeOutState() 143................................................................................................ 2.31 vTaskStartScheduler() 145.................................................................................................... 2.32 vTaskStepTick() 147............................................................................................................... 2.33 vTaskSuspend() 149............................................................................................................... 2.34 vTaskSuspendAll() 151.......................................................................................................... 2.35 taskYIELD() 153...................................................................................................................... 章节 3Queue.................................................................................................................................. API155 3.1 vQueueAddToRegistry() 156................................................................................................. 3.2 xQueueAddToSet() 158.......................................................................................................... 3.3 xQueueCreate() 160............................................................................................................... 3.4 xQueueCreateSet() 162......................................................................................................... 3.5 xQueueCreateStatic() 166..................................................................................................... 3.6 vQueueDelete() 168................................................................................................................ 3.7 pcQueueGetName() 170........................................................................................................ 3.8 xQueueIsQueueEmptyFromISR() 171................................................................................. 3.9 xQueueIsQueueFullFromISR() 172...................................................................................... 3.10 uxQueueMessagesWaiting() 173.......................................................................................... 3.11 uxQueueMessagesWaitingFromISR() 174..........................................................................六 3.12 xQueueOverwrite() 176.......................................................................................................... 3.13 xQueueOverwriteFromISR() 178.......................................................................................... 3.14 xQueuePeek() 180.................................................................................................................. 3.15 xQueuePeekFromISR() 183.................................................................................................. 3.16 xQueueReceive() 184............................................................................................................. 3.17 xQueueReceiveFromISR() 187............................................................................................. 3.18 xQueueRemoveFromSet() 190............................................................................................. 3.19 xQueueReset() 192................................................................................................................. 3.20 xQueueSelectFromSet() 193................................................................................................. 3.21 xQueueSelectFromSetFromISR() 195................................................................................. 3.22 xQueueSend() , xQueueSendToFront() , xQueueSendToBack() 197............... 3.23 xQueueSendFromISR() , xQueueSendToBackFromISR() , xQueueSendToFrontFromISR() ............................................................200 3.24 uxQueueSpacesAvailable() 204............................................................................................ 章节 4Semaphore......................................................................................................................... API206 4.1 vSemaphoreCreateBinary() 207........................................................................................... 4.2 xSemaphoreCreateBinary() 210........................................................................................... 4.3 xSemaphoreCreateBinaryStatic() 213................................................................................. 4.4 xSemaphoreCreateCounting() 216....................................................................................... 4.5 xSemaphoreCreateCountingStatic() 219............................................................................. 4.6 xSemaphoreCreateMutex() 222............................................................................................ 4.7 xSemaphoreCreateMutexStatic() 224.................................................................................. 4.8 xSemaphoreCreateRecursiveMutex() 226.......................................................................... 4.9 xSemaphoreCreateRecursiveMutexStatic() 229................................................................ 4.10 vSemaphoreDelete() 231....................................................................................................... 4.11 uxSemaphoreGetCount() 232............................................................................................... 4.12 xSemaphoreGetMutexHolder() 233...................................................................................... 4.13 xSemaphoreGive() 234.......................................................................................................... 4.14 xSemaphoreGiveFromISR() 236.......................................................................................... 4.15 xSemaphoreGiveRecursive() 239......................................................................................... 4.16 xSemaphoreTake() 242.......................................................................................................... 4.17 xSemaphoreTakeFromISR() 245.......................................................................................... 4.18 xSemaphoreTakeRecursive() 247........................................................................................ 章节 5Software 定时器................................................................................................................. API251 5.1 xTimerChangePeriod() 252.................................................................................................... 5.2 xTimerChangePeriodFromISR() 255.................................................................................... 5.3 xTimerCreate() 257................................................................................................................. 5.4 xTimerCreateStatic() 261.......................................................................................................9 5.5 xTimerDelete() 265.................................................................................................................. 5.1 xTimerGetExpiryTime() ....................................................................................................267 5.1 pcTimerGetName() 269.......................................................................................................... 5.2 xTimerGetPeriod() 270........................................................................................................... 5.3 xTimerGetTimerDaemonTaskHandle() 271........................................................................ 5.4 pvTimerGetTimerID() 272...................................................................................................... 5.5 xTimerIsTimerActive() 274..................................................................................................... 5.6 xTimerPendFunctionCall() 276.............................................................................................. 5.7 xTimerPendFunctionCallFromISR() 278..............................................................................8 5.8 xTimerReset() 281................................................................................................................... 5.9 xTimerResetFromISR() 284................................................................................................... 5.10 vTimerSetTimerID() 286......................................................................................................... 5.11 xTimerStart() 288..................................................................................................................... 5.12 xTimerStartFromISR() 290..................................................................................................... 5.13 xTimerStop() 292..................................................................................................................... 5.14 xTimerStopFromISR() 294..................................................................................................... 章节 6Event 组............................................................................................................................... API296 6.1 xEventGroupClearBits() 297.................................................................................................. 6.2 xEventGroupClearBitsFromISR() 299.................................................................................. 6.3 xEventGroupCreate() 302...................................................................................................... 6.4 xEventGroupCreateStatic() 304............................................................................................ 6.1 vEventGroupDelete() 306...................................................................................................... 6.2 xEventGroupGetBits() 307..................................................................................................... 6.1 xEventGroupGetBitsFromISR() 308..................................................................................... 6.2 xEventGroupSetBits() 309..................................................................................................... 6.3 xEventGroupSetBitsFromISR() 311..................................................................................... 6.1 xEventGroupSync() 314......................................................................................................... 6.2 xEventGroupWaitBits() 318................................................................................................... 章节 7Kernel................................................................................................................. Configuration321 7.1 FreeRTOSConfig.h322............................................................................................................... 7.2 常量开始“INCLUDE_”...........................................................................................................323 7.3 常量开始“配置”.......................................................................................................................327 附录 1: 数据类型和编码样式.................................................................................................. Guide347