ucos 3.00.4源码

/* ************************************************************************************************************************ * uC/OS-III * The Real-Time Kernel * * (c) Copyright 2009, Micrium, Weston, FL * All Rights Reserved * www.Micrium.com * * CORE FUNCTIONS * * File : OS_CORE.C * By : JJL * Version : V3.00.4 * * LICENSING TERMS: * --------------- * uC/OS-III is provided in source form to registered licensees. It is illegal to distribute this source * code to any third party unless you receive written permission by an authorized Micrium officer. * * 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. ************************************************************************************************************************ */ #include <os.h> /* ************************************************************************************************************************ * 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; OS_STK_SIZE size; #ifdef OS_SAFETY_CRITICAL_RELEASE if (p_err == (OS_ERR *)0) { OS_SAFETY_CRITICAL_EXCEPTION(); } #endif 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_ROUND_ROBIN_EN > 0u OSSchedRoundRobinEn = DEF_FALSE; OSSchedRoundRobinDfltTimeQuanta = OSCfg_TickRate_Hz / 10u; #endif if (OSCfg_ISRStkSize > (OS_STK_SIZE)0) { p_stk = OSCfg_ISRStkBasePtr; /* Clear exception stack for stack checking. */ if (p_stk != (CPU_STK *)0) { size = OSCfg_ISRStkSize; while (size > (OS_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; } OS_IdleTaskInit(p_err); /* Initialize the Idle Task */ 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_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 OSInitHook(); /* Call port specific initialization code */ 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 * the last nested ISR. * * Arguments : none * * Returns : none * * Note(s) : 1) This function MUST be called with interrupts already disabled * * 2) Your ISR can directly increment 'OSIntNestingCtr' without calling this function because OSIntNestingCtr has * been declared 'global', the port is actually considered part of the OS and thus is allowed to access * uC/OS-III variables. * * 3) You MUST still call OSIntExit() even though you increment 'OSIntNestingCtr' directly. * * 4) You MUST inv