os_cpu_c.c

绝对经典的uc/os的程序

   	OSTimeTick();					/* Must be called during tick isr */
   	OSIntExit();					/* Must be called finally at every hardware interupt exit point */
    if(OSIntNesting==0)
	{
		EA=0;
        C_XBP=OSTCBCur->OSTCBStkPtr;
		SP=SaveSP;
#pragma ASM
		POP	 IE
#pragma ENDASM
	}
}

/* Sample user ISR: Serial communication */
/* If you want to write ISRs for your own, just do as following */
void SerialIntr(void) interrupt 4
{
/* Do this first */
    OSIntNesting++;                      /* Increment ISR nesting level directly to speed up processing */
//	OSIntEnter();					/* Must be called first at every hardware interrupt entry point */
    if(OSIntNesting==1)                     /* Only at the outerest interrupt we do these. */
		{
#pragma ASM
		PUSH IE
#pragma ENDASM
		EA=0;
		SaveSP=SP;
        OSTCBCur->OSTCBStkPtr=C_XBP;	/* OSTCBCur->OSTCBStkPtr is free now, so it can be used to story the value of SP */
		EA=1;
    	}


/* Next you can do something for yourself. */
/* Finally, before exit from ISR, must do as following. */
   	OSIntExit();					/* Must be called finally at every hardware interupt exit point */
    if(OSIntNesting==0)
	{
		EA=0;
        C_XBP=OSTCBCur->OSTCBStkPtr;
		SP=SaveSP;
#pragma ASM
		POP	 IE
#pragma ENDASM
	}
}


/*$PAGE*/
#if OS_CPU_HOOKS_EN
/*
*********************************************************************************************************
*                                       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_VERSION > 203
void OSInitHookBegin (void) KCREENTRANT
{
}
#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_VERSION > 203
void OSInitHookEnd (void) KCREENTRANT
{
}
#endif


/*
*********************************************************************************************************
*                                          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.
*********************************************************************************************************
*/
void OSTaskCreateHook (OS_TCB *ptcb) KCREENTRANT
{
    ptcb = ptcb;                       /* Prevent compiler warning                                     */
}


/*
*********************************************************************************************************
*                                           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_TASK_DEL_EN > 0
void OSTaskDelHook (OS_TCB *ptcb) KCREENTRANT
{
    ptcb = ptcb;                       /* Prevent compiler warning                                     */
}
#endif

/*
*********************************************************************************************************
*                                           TASK SWITCH HOOK
*
* Description: This function is called when a task switch is performed.  This allows you to perform other
*              operations during a context switch.
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts are disabled during this call.
*              2) It is assumed that the global pointer 'OSTCBHighRdy' points to the TCB of the task that
*                 will be 'switched in' (i.e. the highest priority task) and, 'OSTCBCur' points to the 
*                 task being switched out (i.e. the preempted task).
*********************************************************************************************************
*/
void OSTaskSwHook (void) KCREENTRANT
{
}

/*
*********************************************************************************************************
*                                           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
*********************************************************************************************************
*/
void OSTaskStatHook (void) KCREENTRANT
{
}

/*
*********************************************************************************************************
*                                           OSTCBInit() HOOK
*
* Description: This function is called by OSTCBInit() after setting up most of the TCB.
*
* Arguments  : ptcb    is a pointer to the TCB of the task being created.
*
* Note(s)    : 1) Interrupts may or may not be ENABLED during this call.
*********************************************************************************************************
*/
#if OS_VERSION > 203
void OSTCBInitHook (OS_TCB *ptcb) KCREENTRANT
{
    ptcb = ptcb;                                           /* Prevent Compiler warning                 */
}
#endif


/*
*********************************************************************************************************
*                                               TICK HOOK
*
* Description: This function is called every tick.
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts may or may not be ENABLED during this call.
*********************************************************************************************************
*/
void OSTimeTickHook (void) KCREENTRANT
{
}


/*
*********************************************************************************************************
*                                             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_VERSION >= 251
void OSTaskIdleHook (void) KCREENTRANT
{
}
#endif

#endif