astroboy astroboy
Quick and dirty CoOS + LWIP ( Webserver )
Diff: CoOS/kernel/core.c
- Revision:
- 0:94897d537b31
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/CoOS/kernel/core.c Sat Sep 10 22:41:10 2011 +0000
@@ -0,0 +1,238 @@
+ /**
+ *******************************************************************************
+ * @file core.c
+ * @version V1.1.4
+ * @date 2011.04.20
+ * @brief Core implementation code of CooCox CoOS kernel.
+ *******************************************************************************
+ * @copy
+ *
+ * INTERNAL FILE,DON'T PUBLIC.
+ *
+ * <h2><center>© COPYRIGHT 2009 CooCox </center></h2>
+ *******************************************************************************
+ */
+
+/*---------------------------- Include ---------------------------------------*/
+#include <coocox.h>
+
+/*---------------------------- Variable Define -------------------------------*/
+volatile U8 OSIntNesting = 0; /*!< Use to indicate interrupt nesting level*/
+volatile U8 OSSchedLock = 0; /*!< Task Switch lock. */
+volatile BOOL TaskSchedReq = Co_FALSE;
+
+
+/**
+ *******************************************************************************
+ * @brief Enter a ISR.
+ * @param[in] None
+ * @param[out] None
+ * @retval None
+ *
+ * @par Description
+ * @details This function is called to notify OS when enter to an ISR.
+ *
+ * @note When you call API in ISR,you must call CoEnterISR() before your
+ * interrupt handler code,and call CoExitISR() after your handler
+ * code and before exiting from ISR.
+ *******************************************************************************
+ */
+void CoEnterISR(void)
+{
+ Inc8(&OSIntNesting); /* OSIntNesting increment */
+}
+
+
+/**
+ *******************************************************************************
+ * @brief Exit a ISR.
+ * @param[in] None
+ * @param[out] None
+ * @retval None
+ *
+ * @par Description
+ * @details This function is called when exit from a ISR.
+ *
+ * @note
+ *******************************************************************************
+ */
+void CoExitISR(void)
+{
+ Dec8(&OSIntNesting); /* OSIntNesting decrease */
+ if( OSIntNesting == 0) /* Is OSIntNesting == 0? */
+ {
+ if(TaskSchedReq == Co_TRUE)
+ {
+ OSSchedLock++;
+ Schedule(); /* Call task schedule */
+ OSSchedLock--;
+ }
+ }
+}
+
+
+
+/**
+ *******************************************************************************
+ * @brief Unlock schedule
+ * @param[in] None
+ * @param[out] None
+ * @retval None
+ *
+ * @par Description
+ * @details This function is called to unlock schedule(i.e.enable schedule again)
+ *
+ * @note
+ *******************************************************************************
+ */
+void OsSchedUnlock(void)
+{
+ if(OSSchedLock == 1) /* Is OSSchedLock == 0? */
+ {
+#if CFG_TASK_WAITTING_EN > 0
+ if(IsrReq == Co_TRUE)
+ {
+ RespondSRQ(); /* Respond service request */
+ }
+#endif
+ /* Judge task state change or higher PRI task coming in */
+ if(TaskSchedReq == Co_TRUE)
+ {
+ Schedule(); /* Call task schedule */
+ }
+ OSSchedLock = 0;
+ }
+ else
+ {
+ OSSchedLock--;
+ }
+}
+
+
+/**
+ *******************************************************************************
+ * @brief Lock schedule
+ * @param[in] None
+ * @param[out] None
+ * @retval None
+ *
+ * @par Description
+ * @details This function is called in application code to lock schedule.
+ *
+ * @note
+ *******************************************************************************
+ */
+void CoSchedLock(void)
+{
+ OsSchedLock(); /* Lock schedule */
+}
+
+
+/**
+ *******************************************************************************
+ * @brief Unlock schedule
+ * @param[in] None
+ * @param[out] None
+ * @retval None
+ *
+ * @par Description
+ * @details This function is called in APP to unlock schedule.
+ *
+ * @note
+ *******************************************************************************
+ */
+void CoSchedUnlock(void)
+{
+ OsSchedUnlock(); /* Unlock schedule */
+}
+
+
+/**
+ *******************************************************************************
+ * @brief Initialize OS
+ * @param[in] None
+ * @param[out] None
+ * @retval None
+ *
+ * @par Description
+ * @details This function is called to initialize OS.
+ *
+ * @note You must call this function first,before any other OS API function
+ *
+ * @code There is a example for useage of this function,as follows:
+ * e.g.
+ * ... // Your target initial code.
+ *
+ * OsInit(); // Initial OS.
+ * CreateTask(...); // Create tasks.
+ * ...
+ * OsStart(); // Start multitask.
+ * @endcode
+ *******************************************************************************
+ */
+void CoInitOS(void)
+{
+ InitSysTick(); /* Initialize system tick. */
+ InitInt(); /* Initialize PendSV,SVC,SysTick interrupt */
+ CreateTCBList(); /* Create TCB list. */
+#if CFG_EVENT_EN > 0
+ CreateEventList(); /* Create event control list. */
+#endif
+#if CFG_KHEAP_EN > 0
+ CoCreateKheap(); /* Create kernel heap within user define */
+#endif
+ OsSchedLock(); /* Lock Schedule */
+ /* Create first task -- IDLE task. */
+ CoCreateTask( CoIdleTask,
+ Co_NULL,
+ CFG_LOWEST_PRIO,
+ &idle_stk[CFG_IDLE_STACK_SIZE-1],
+ CFG_IDLE_STACK_SIZE
+ );
+ /* Set PSP for CoIdleTask coming in */
+ SetEnvironment(&idle_stk[CFG_IDLE_STACK_SIZE-1]);
+}
+
+
+/**
+ *******************************************************************************
+ * @brief Start multitask
+ * @param[in] None
+ * @param[out] None
+ * @retval None
+ *
+ * @par Description
+ * @details This function is called to start multitask.After it is called,
+ * OS start schedule task by priority or/and time slice.
+ * @note This function must be called to start OS when you use CoOS,and must
+ * call after CoOsInit().
+ *******************************************************************************
+ */
+void CoStartOS(void)
+{
+ TCBRunning = &TCBTbl[0]; /* Get running task */
+ TCBNext = TCBRunning; /* Set next scheduled task as running task */
+ TCBRunning->state = TASK_RUNNING; /* Set running task status to RUNNING */
+ RemoveFromTCBRdyList(TCBRunning); /* Remove running task from READY list */
+ OsSchedUnlock(); /* Enable Schedule,call task schedule */
+}
+
+
+/**
+ *******************************************************************************
+ * @brief Get OS version
+ * @param[in] None
+ * @param[out] None
+ * @retval The value is version of OS mutipled by 100.
+ *
+ * @par Description
+ * @details This function is used to return the version number of CooCox OS.
+ * the return value corresponds to CooCox's version number multiplied
+ * by 100. In other words, version 1.02 would be returned as 102.
+ *******************************************************************************
+ */
+OS_VER CoGetOSVersion(void)
+{
+ return OS_VERSION; /* Get CooCox CoOS version */
+}
+