uCOS-III 内核源代码

/* ************************************************************************************************************************ * uC/OS-III * The Real-Time Kernel * * (c) Copyright 2009-2011; Micrium, Inc.; Weston, FL * All rights reserved. Protected by international copyright laws. * * CORE FUNCTIONS * * File : OS_CORE.C * By : JJL * Version : V3.02.00 * * LICENSING TERMS: * --------------- * uC/OS-III is provided in source form for FREE short-term evaluation, for educational use or * for peaceful research. If you plan or intend to use uC/OS-III in a commercial application/ * product then, you need to contact Micrium to properly license uC/OS-III for its use in your * application/product. We provide ALL the source code for your convenience and to help you * experience uC/OS-III. The fact that the source is provided does NOT mean that you can use * it commercially without paying a licensing fee. * * Knowledge of the source code may NOT be used to develop a similar product. * * Please help us continue to provide the embedded community with the finest software available. * Your honesty is greatly appreciated. * * You can contact us at www.micrium.com, or by phone at +1 (954) 217-2036. ************************************************************************************************************************ */ #include <os.h> #ifdef VSC_INCLUDE_SOURCE_FILE_NAMES const CPU_CHAR *os_core__c = "$Id: $"; #endif /* ************************************************************************************************************************ * INITIALIZATION * * Description: This function is used to initialize the internals of uC/OS-III and MUST be called prior to * creating any uC/OS-III object and, prior to calling OS_Start(). * * Arguments : p_err is a pointer to a variable that will contain an error code returned by this function. * * OS_ERR_NONE Initialization was successful * Other Other OS_ERR_xxx depending on the sub-functions called by OSInit(). * Returns : none ************************************************************************************************************************ */ void OSInit (OS_ERR *p_err) { CPU_STK *p_stk; CPU_STK_SIZE size; #ifdef OS_SAFETY_CRITICAL if (p_err == (OS_ERR *)0) { OS_SAFETY_CRITICAL_EXCEPTION(); return; } #endif OSInitHook(); /* Call port specific initialization code */ OSIntNestingCtr = (OS_NESTING_CTR)0; /* Clear the interrupt nesting counter */ OSRunning = OS_STATE_OS_STOPPED; /* Indicate that multitasking not started */ OSSchedLockNestingCtr = (OS_NESTING_CTR)0; /* Clear the scheduling lock counter */ #if OS_CFG_SCHED_LOCK_TIME_MEAS_EN > 0u OSSchedLockTimeBegin = (CPU_TS)0; OSSchedLockTimeMax = (CPU_TS)0; OSSchedLockTimeMaxCur = (CPU_TS)0; #endif #ifdef OS_SAFETY_CRITICAL_IEC61508 OSSafetyCriticalStartFlag = DEF_FALSE; #endif #if OS_CFG_SCHED_ROUND_ROBIN_EN > 0u OSSchedRoundRobinEn = DEF_FALSE; OSSchedRoundRobinDfltTimeQuanta = OSCfg_TickRate_Hz / 10u; #endif if (OSCfg_ISRStkSize > (CPU_STK_SIZE)0) { p_stk = OSCfg_ISRStkBasePtr; /* Clear exception stack for stack checking. */ if (p_stk != (CPU_STK *)0) { size = OSCfg_ISRStkSize; while (size > (CPU_STK_SIZE)0) { size--; *p_stk = (CPU_STK)0; p_stk++; } } } #if OS_CFG_APP_HOOKS_EN > 0u OS_AppTaskCreateHookPtr = (OS_APP_HOOK_TCB )0; /* Clear application hook pointers */ OS_AppTaskDelHookPtr = (OS_APP_HOOK_TCB )0; OS_AppTaskReturnHookPtr = (OS_APP_HOOK_TCB )0; OS_AppIdleTaskHookPtr = (OS_APP_HOOK_VOID)0; OS_AppStatTaskHookPtr = (OS_APP_HOOK_VOID)0; OS_AppTaskSwHookPtr = (OS_APP_HOOK_VOID)0; OS_AppTimeTickHookPtr = (OS_APP_HOOK_VOID)0; #endif OS_PrioInit(); /* Initialize the priority bitmap table */ OS_RdyListInit(); /* Initialize the Ready List */ OS_TaskInit(p_err); /* Initialize the task manager */ if (*p_err != OS_ERR_NONE) { return; } #if OS_CFG_ISR_POST_DEFERRED_EN > 0u OS_IntQTaskInit(p_err); /* Initialize the Interrupt Queue Handler Task */ if (*p_err != OS_ERR_NONE) { return; } #endif OS_IdleTaskInit(p_err); /* Initialize the Idle Task */ if (*p_err != OS_ERR_NONE) { return; } OS_TickTaskInit(p_err); /* Initialize the Tick Task */ if (*p_err != OS_ERR_NONE) { return; } #if OS_CFG_STAT_TASK_EN > 0u /* Initialize the Statistic Task */ OS_StatTaskInit(p_err); if (*p_err != OS_ERR_NONE) { return; } #endif #if OS_CFG_FLAG_EN > 0u /* Initialize the Event Flag module */ OS_FlagInit(p_err); if (*p_err != OS_ERR_NONE) { return; } #endif #if OS_CFG_MEM_EN > 0u /* Initialize the Memory Manager module */ OS_MemInit(p_err); if (*p_err != OS_ERR_NONE) { return; } #endif #if (OS_MSG_EN) > 0u /* Initialize the free list of OS_MSGs */ OS_MsgPoolInit(p_err); if (*p_err != OS_ERR_NONE) { return; } #endif #if OS_CFG_MUTEX_EN > 0u /* Initialize the Mutex Manager module */ OS_MutexInit(p_err); if (*p_err != OS_ERR_NONE) { return; } #endif #if OS_CFG_Q_EN > 0u OS_QInit(p_err); /* Initialize the Message Queue Manager module */ if (*p_err != OS_ERR_NONE) { return; } #endif #if OS_CFG_SEM_EN > 0u /* Initialize the Semaphore Manager module */ OS_SemInit(p_err); if (*p_err != OS_ERR_NONE) { return; } #endif #if OS_CFG_TMR_EN > 0u /* Initialize the Timer Manager module */ OS_TmrInit(p_err); if (*p_err != OS_ERR_NONE) { return; } #endif #if OS_CFG_DBG_EN > 0u OS_Dbg_Init(); #endif OSCfg_Init(); } /*$PAGE*/ /* ************************************************************************************************************************ * ENTER ISR * * Description: This function is used to notify uC/OS-III that you are about to service an interrupt service routine * (ISR). This allows uC/OS-III to keep track of interrupt nesting and thus only perform rescheduling at