LiteOS内核函数解析-RTOS内核原理.zip_liteos与rtos_liteos内核函数_rtos_rtoslite

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LiteOS内核函数解析-RTOS内核原理.zip （1个子文件）

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LiteOS 内核函数解析 
基于 V1.0 版本内核 
申明：因本人水平有限，本文档难免有疏漏或错误之处，欢迎指正或邮箱交流。 
作者：狐狸老了【mhw_0517@163.com】 
一、  任务相关函数 ......................................................................................................................... 4 
1  基本任务函数 .................................................................................................................... 4 
1.1    数据结构解析 ....................................................................................................... 4 
1.2    osTaskInit( )函数 ................................................................................................... 5 
1.3    LOS_TaskCreate( )函数 .......................................................................................... 7 
1.4    LOS_TaskCreateOnly( )函数 .................................................................................. 9 
1.5    LOS_TaskDelete( )函数 ........................................................................................ 11 
1.6    LOS_TaskSuspend( )函数 ..................................................................................... 13 
1.7    LOS_TaskResume( )函数 ..................................................................................... 14 
1.8    LOS_TaskLock( )和 LOS_TaskUnlock( )函数 ......................................................... 15 
1.9    LOS_TaskPriSet( )和 LOS_TaskPriGet( )函数 ....................................................... 16 
1.10    osTaskPriModify( )函数 ..................................................................................... 17 
1.11    osTskStackInit( )函数 ......................................................................................... 17 
1.12    osTaskEntry( )函数 ............................................................................................ 19 
1.13    osTaskSelfDelete( )函数 .................................................................................... 21 
2  任务延时相关函数 .......................................................................................................... 22 
2.1    LOS_TaskDelay( )函数 ......................................................................................... 22 
2.2    osTaskAdd2TimerList( )函数 ............................................................................... 23 
2.3    osTimerListDelete( )函数 .................................................................................... 26 
3  系统调度相关函数 .......................................................................................................... 26 
3.1    系统 tick 相关函数 ............................................................................................. 26 
3.2    时间片的检测及轮转调度 ................................................................................. 28 
3.3    cortex-m4 寄存器组简单说明 ........................................................................... 30 
3.4    PEND_SV 中断说明............................................................................................. 32 
3.5    系统调度的启动：LOS_StartToRun( )函数 ........................................................ 34 
3.6    系统调度的实现：LOS_Schedule( )和 osTaskSchedule( )函数 ......................... 37 
3.7    排序队列的扫描及调度：osTaskScan( )函数 ................................................... 42 
二、  内存池管理 ........................................................................................................................... 46 
1  内存池管理概述 .............................................................................................................. 46 
2  静态内存池 ...................................................................................................................... 46 
2.1    宏定义和结构体解析 ......................................................................................... 46 
2.2    LOS_MemboxInit( )函数 ..................................................................................... 47 
2.3    LOS_MemboxAlloc( )函数 ................................................................................... 48 
2.4    LOS_MemboxFree( )函数 .................................................................................... 49 
2.5    osCheckBoxMem( )函数 ..................................................................................... 50 
2.6    LOS_MemboxClr( )函数 ...................................................................................... 50 

3  动态内存池 ...................................................................................................................... 51 
3.1    相关数据结构解析 ............................................................................................. 51 
3.2    LOS_MemInit( )函数 ........................................................................................... 52 
3.3    LOS_MemAlloc( )函数 ......................................................................................... 54 
3.4    osMemAllocWithCheck( )函数............................................................................ 55 
3.5    osMemFindSuitableFreeBlock( )函数 ................................................................. 56 
3.6    osMemSpitNode( )函数 ...................................................................................... 57 
3.7    osMemMergeNode( )函数 .................................................................................. 57 
3.8    LOS_MemAllocAlign( )函数 ................................................................................. 58 
3.9    LOS_MemFree( )函数 ......................................................................................... 59 
3.10    osMemCheckUsedNode( )函数 ........................................................................ 60 
3.11    osMemIsNodeValid( )函数 ................................................................................ 61 
3.12    osMemFreeNode( )函数 ................................................................................... 62 
3.13    LOS_MemRealloc( )函数 ................................................................................... 63 
3.14    osMemReAllocSmaller( )函数 ........................................................................... 64 
3.15    osMemMergeNodeForReAllocBigger( )函数 .................................................... 65 
三、  IPC 通信(消息队列和事件) .................................................................................................. 66 
1  消息队列.......................................................................................................................... 66 
1.1    QUEUE_CB_S 结构解析 ...................................................................................... 66 
1.2    osQueueInit( )函数 ............................................................................................. 67 
1.3    LOS_QueueCreate( )函数 .................................................................................... 67 
1.4    osQueueCreate( )函数 ........................................................................................ 68 
1.5    LOS_QueueDelete( )函数 .................................................................................... 69 
1.6    osQueuePend( )函数 ........................................................................................... 70 
1.7    osQueueWakeUp( )函数 ..................................................................................... 71 
1.8    LOS_QueueRead( )函数 ...................................................................................... 72 
1.9    LOS_QueueWrite( )函数 ..................................................................................... 74 
1.10    osQueueMailAlloc( )函数 .................................................................................. 77 
1.11    osQueueMailFree( )函数 .................................................................................. 78 
2  事件 ................................................................................................................................. 79 
2.1    EVENT_CB_S 结构解析 ....................................................................................... 79 
2.2    LOS_EventInit( )函数 ........................................................................................... 80 
2.3    LOS_EventWrite( )函数 ....................................................................................... 80 
2.4    LOS_EventRead( )函数 ........................................................................................ 81 
2.5    LOS_EventPoll( )函数 .......................................................................................... 84 
2.6    LOS_EventClear( )函数 ........................................................................................ 84 
2.7    LOS_EventDestory( )函数 .................................................................................... 85 
四、  IPC 之任务同步(互斥锁和信号量) ...................................................................................... 86 
1  优先级翻转问题概述 ...................................................................................................... 86 
2  互斥锁.............................................................................................................................. 87 
2.1    MUX_CB_S 结构解析 ......................................................................................... 87 
2.2    osMuxInit( )函数 ................................................................................................. 87 
2.3    LOS_MuxCreate( )函数 ....................................................................................... 88 
2.4    LOS_MuxDelete( )函数 ....................................................................................... 89 

2.5    LOS_MuxPend( )函数 .......................................................................................... 89 
2.6    LOS_MuxPost( )函数 ........................................................................................... 92 
3  信号量.............................................................................................................................. 94 
3.1    SEM_CB_S 结构解析 .......................................................................................... 94 
3.2    osSemInit( )函数 ................................................................................................. 94 
3.3    LOS_SemCreate( )函数 ........................................................................................ 95 
3.4    LOS_SemDelete( )函数 ........................................................................................ 96 
3.5    LOS_SemPend( )函数 .......................................................................................... 96 
3.6    LOS_SemPost( )函数 ........................................................................................... 99 
五、  软件定时器 ......................................................................................................................... 101 
1  软件定时器任务函数 .................................................................................................... 101 
1.1    SWTMR_CTRL_S 结构解析 ............................................................................... 101 
1.2    osSwTmrInit( )函数 ........................................................................................... 102 
1.3    osSwTmrTaskCreate( )函数 ............................................................................... 103 
1.4    osSwTmrTask( )函数 .......................................................................................... 103 
2  软件定时器基本函数 .................................................................................................... 104 
2.1    LOS_SwtmrCreate( )函数 .................................................................................. 104 
2.2    LOS_SwtmrStart( )函数 ..................................................................................... 105 
2.3    LOS_SwtmrStop( )函数 ..................................................................................... 106 
2.4    LOS_SwtmrDelete( )函数 .................................................................................. 107 
2.5    osSwTmrStart( )函数 ......................................................................................... 108 
2.6    osSwtmrStop( )函数 .......................................................................................... 109 
2.7    osSwtmrDelete( )函数 ...................................................................................... 109 
3  软件定时器扫描及处理 ................................................................................................ 110 
3.1    osSwtmrScan( )函数 .......................................................................................... 110 
3.2    osSwTmrTimeoutHandle( )函数 ........................................................................ 110 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 