UCOS2.81Port.rar_OSView_ucos 2._ucosView

/* ********************************************************************************************************* * uC/OS-II * The Real-Time Kernel * * ATmega128 Specific code * * File : OS_CPU_C.C * By : Jean J. Labrosse ********************************************************************************************************* */ #define OS_CPU_GLOBALS #include <ucos_ii.h> #if OS_VIEW_MODULE > 0 #include <OS_VIEWc.H> #include <OS_VIEW.H> #endif /* ********************************************************************************************************* * LOCAL GLOBAL VARIABLES ********************************************************************************************************* */ #if OS_VERSION >= 281 && OS_TMR_EN > 0 static INT16U OSTmrCtr; #endif /* ********************************************************************************************************* * OS INITIALIZATION HOOK * (BEGINNING) * * Description: This function is called by OSInit() at the beginning of OSInit(). * * Arguments : none * * Note(s) : 1) Interrupts should be disabled during this call. ********************************************************************************************************* */ #if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203 void OSInitHookBegin (void) { #if OS_VERSION >= 281 && OS_TMR_EN > 0 OS_CPU_TmrCtr = 0; #endif } #endif /* ********************************************************************************************************* * OS INITIALIZATION HOOK * (END) * * Description: This function is called by OSInit() at the end of OSInit(). * * Arguments : none * * Note(s) : 1) Interrupts should be disabled during this call. ********************************************************************************************************* */ #if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203 void OSInitHookEnd (void) { } #endif /*$PAGE*/ /* ********************************************************************************************************* * TASK CREATION HOOK * * Description: This function is called when a task is created. * * Arguments : ptcb is a pointer to the task control block of the task being created. * * Note(s) : 1) Interrupts are disabled during this call. ********************************************************************************************************* */ #if OS_CPU_HOOKS_EN > 0 void OSTaskCreateHook (OS_TCB *ptcb) { #if OS_VIEW_MODULE > 0 OSView_TaskCreateHook(ptcb); #else ptcb = ptcb; /* Prevent compiler warning */ #endif } #endif /* ********************************************************************************************************* * TASK DELETION HOOK * * Description: This function is called when a task is deleted. * * Arguments : ptcb is a pointer to the task control block of the task being deleted. * * Note(s) : 1) Interrupts are disabled during this call. ********************************************************************************************************* */ #if OS_CPU_HOOKS_EN > 0 void OSTaskDelHook (OS_TCB *ptcb) { ptcb = ptcb; /* Prevent compiler warning */ } #endif /* ********************************************************************************************************* * IDLE TASK HOOK * * Description: This function is called by the idle task. This hook has been added to allow you to do * such things as STOP the CPU to conserve power. * * Arguments : none * * Note(s) : 1) Interrupts are enabled during this call. ********************************************************************************************************* */ #if OS_CPU_HOOKS_EN > 0 && OS_VERSION >= 251 void OSTaskIdleHook (void) { } #endif /* ********************************************************************************************************* * STATISTIC TASK HOOK * * Description: This function is called every second by uC/OS-II's statistics task. This allows your * application to add functionality to the statistics task. * * Arguments : none ********************************************************************************************************* */ #if OS_CPU_HOOKS_EN > 0 void OSTaskStatHook (void) { } #endif /*$PAGE*/ /* ********************************************************************************************************** * INITIALIZE A TASK'S STACK * * Description: This function is called by either OSTaskCreate() or OSTaskCreateExt() to initialize the * stack frame of the task being created. This function is highly processor specific. * * Arguments : task is a pointer to the task code * * p_arg is a pointer to a user supplied data area that will be passed to the task * when the task first executes. * * ptos is a pointer to the top of stack. It is assumed that 'ptos' points to the * highest valid address on the stack. * * opt specifies options that can be used to alter the behavior of OSTaskStkInit(). * (see uCOS_II.H for OS_TASK_OPT_???). * * Returns : Always returns the location of the new top-of-stack' once the processor registers have * been placed on the stack in the proper order. * * Note(s) : Interrupts are enabled when your task starts executing. You can change this by setting the * SREG to 0x00 instead. In this case, interrupts would be disabled upon task startup. The * application code would be responsible for enabling interrupts at the beginning of the task * code. You will need to modify OSTaskIdle() and OSTaskStat() so that they enable interrupts. * Failure to do this will make your system crash! * * The AVR return stack is placed OS_TASK_HARD_STK_SIZE bytes before the bottom of the task's * stack. * * (1) IMPORTANT: The ICC compiler handles function pointers by actually passing the pointer * to a location in Flash that actually contains the pointer to the function. * * (2) IMPORTANT: You MUST set OSTaskStkSize and OSTaskStkSizeHard BEFORE calling OSInit() * to initialize the Idle and statistic tasks stacks. ********************************************************************************************************** */ OS_STK *OSTaskStkInit (void (*task)(void *pd), void *p_arg, OS_STK *ptos, INT16U opt) { INT8U *psoft_stk; INT8U *phard_stk; /* Temp. variable used for setting up AVR hardware stack */ INT16U tmp; (void)opt; /* 'opt' is not used, prevent warning */ psoft_stk = (INT8U *)ptos; phard_stk = (INT8U *)ptos - OSTaskStkSize /* Task stack size */ + OSTaskStkSizeHard; /* AVR return stack ("hardware stack") */ tmp = *(INT16U const *)task; /* (1) ICC compiler handles function pointers indirectly! */ *phard_stk-- = (INT8U)