97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/**
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*******************************************************************************
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* @file cpu.c
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* @version V1.12
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* @date 2010.03.01
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* @brief This file provides InitTaskContext() and SysTick_Handler().
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*******************************************************************************
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* @copy
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* WRITE COPY INFORMATION USE CAPITAL LETTER
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*
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* <h2><center>© COPYRIGHT 2009 CooCox </center></h2>
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*******************************************************************************
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*/
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/*---------------------------- Include ---------------------------------------*/
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#include <coocox.h>
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U64 OSTickCnt = 0; /*!< Current system tick counter */
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/**
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******************************************************************************
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* @brief Initial task context
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* @param[in] task Entry point of task.
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* @param[in] param The parameter pass to task.
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* @param[in] pstk The pointer to stack top.
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* @param[out] None
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* @retval Returns location of new stack top.
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*
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* @par Description
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* @details This function is called to initialize the stack frame of the
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* task being created.
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******************************************************************************
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*/
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OS_STK *InitTaskContext(FUNCPtr task,void *param,OS_STK *pstk)
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{
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OS_STK *context;
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context = pstk;
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*(context--) = (U32)0x01000000L; /* xPSR */
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*(context--) = (U32)task; /* Entry point of task. */
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*(context) = (U32)0xFFFFFFFEL;
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context = context - 5;
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*(context) = (U32)param; /* R0: argument */
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context = context - 8;
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return (context); /* Returns location of new stack top. */
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}
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/**
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*******************************************************************************
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* @brief System tick interrupt handler.
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* @param[in] None
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* @param[out] None
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* @retval None
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*
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* @par Description
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* @details This is system tick interrupt headler.
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* @note CoOS may schedule when exiting this ISR.
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*******************************************************************************
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*/
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void CoSysTick_Handler(void)
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{
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OSSchedLock++; /* Lock scheduler. */
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OSTickCnt++; /* Increment systerm time. */
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#if CFG_TASK_WAITTING_EN >0
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if(DlyList != NULL) /* Have task in delay list? */
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{
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if(DlyList->delayTick > 1) /* Delay time > 1? */
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{
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DlyList->delayTick--; /* Decrease delay time of the list head. */
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}
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else
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{
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DlyList->delayTick = 0;
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isr_TimeDispose(); /* Call hander for delay time list */
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}
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}
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#endif
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#if CFG_TMR_EN > 0
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if(TmrList != NULL) /* Have timer in working? */
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{
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if(TmrList->tmrCnt > 1) /* Timer time > 1? */
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{
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TmrList->tmrCnt--; /* Decrease timer time of the list head. */
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}
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else
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{
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TmrList->tmrCnt = 0;
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isr_TmrDispose(); /* Call hander for timer list */
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}
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}
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#endif
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TaskSchedReq = TRUE;
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OsSchedUnlock();
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}
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