Diff: CoOS/portable/arch.c

Revision:

0:94897d537b31

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CoOS/portable/arch.c	Sat Sep 10 22:41:10 2011 +0000
@@ -0,0 +1,96 @@
+/**
+ *******************************************************************************
+ * @file      arch.c
+ * @version    V1.1.4    
+ * @date       2011.04.20
+ * @brief     This file provides InitTaskContext() and SysTick_Handler().
+ *******************************************************************************
+ * @copy
+ *    WRITE COPY INFORMATION USE CAPITAL LETTER
+ *
+ * <h2><center>&copy; COPYRIGHT 2009 CooCox </center></h2>
+ *******************************************************************************
+ */  
+
+/*---------------------------- Include ---------------------------------------*/
+#include <coocox.h>
+U64     OSTickCnt = 0;                  /*!< Current system tick counter      */                                                                              
+
+/**
+ ******************************************************************************
+ * @brief      Initial task context      
+ * @param[in]  task    Entry point of task.
+ * @param[in]  param   The parameter pass to task.    
+ * @param[in]  pstk    The pointer to stack top.     
+ * @param[out] None  
+ * @retval     Returns location of new stack top.         
+ *
+ * @par Description
+ * @details    This function is called to initialize the stack frame of the 
+ *             task being created.
+ ******************************************************************************
+ */
+OS_STK *InitTaskContext(FUNCPtr task,void *param,OS_STK *pstk)
+{
+    OS_STK *context;
+    context  = pstk;
+    *(context--) = (U32)0x01000000L;      /* xPSR            */
+    *(context--) = (U32)task;             /* Entry point of task.                         */
+    *(context)   = (U32)0xFFFFFFFEL;
+    context      = context - 5;
+    *(context)   = (U32)param;            /* R0: argument */
+    context      = context - 8;
+      
+    return (context);                   /* Returns location of new stack top. */
+}
+
+
+ 
+/**
+ *******************************************************************************
+ * @brief      System tick interrupt handler.             
+ * @param[in]  None     
+ * @param[out] None       
+ * @retval     None
+ *         
+ * @par Description
+ * @details    This is system tick interrupt headler.         
+ * @note       CoOS may schedule when exiting this ISR. 
+ *******************************************************************************
+ */ 
+extern "C" void SysTick_Handler(void)
+{
+    OSSchedLock++;                  /* Lock scheduler.                        */
+    OSTickCnt++;                    /* Increment systerm time.                */
+#if CFG_TASK_WAITTING_EN >0    
+    if(DlyList != Co_NULL)             /* Have task in delay list?               */
+    {
+        if(DlyList->delayTick > 1)  /* Delay time > 1?                        */
+        {
+            DlyList->delayTick--;   /* Decrease delay time of the list head.  */         
+        }
+        else
+        {
+            DlyList->delayTick = 0;
+            isr_TimeDispose();       /* Call hander for delay time list        */
+        }
+    }
+#endif
+    
+#if CFG_TMR_EN > 0    
+    if(TmrList != Co_NULL)             /* Have timer in working?                 */
+    {
+        if(TmrList->tmrCnt > 1)     /* Timer time > 1?                        */
+        {
+            TmrList->tmrCnt--;      /* Decrease timer time of the list head.  */        
+        }
+        else
+        {
+            TmrList->tmrCnt = 0;
+            isr_TmrDispose();         /* Call hander for timer list             */
+        }
+    }    
+#endif
+    TaskSchedReq = Co_TRUE;
+    OsSchedUnlock();
+}