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CoOS/kernel/core.c@0:94897d537b31, 2011-09-10 (annotated)

Committer:: astroboy
Date:: Sat Sep 10 22:41:10 2011 +0000
Revision:: 0:94897d537b31

Who changed what in which revision?

User	Revision	Line number	New contents of line
astroboy	0:94897d537b31	1	/**
astroboy	0:94897d537b31	2	*******************************************************************************
astroboy	0:94897d537b31	3	* @file core.c
astroboy	0:94897d537b31	4	* @version V1.1.4
astroboy	0:94897d537b31	5	* @date 2011.04.20
astroboy	0:94897d537b31	6	* @brief Core implementation code of CooCox CoOS kernel.
astroboy	0:94897d537b31	7	*******************************************************************************
astroboy	0:94897d537b31	8	* @copy
astroboy	0:94897d537b31	9	*
astroboy	0:94897d537b31	10	* INTERNAL FILE,DON'T PUBLIC.
astroboy	0:94897d537b31	11	*
astroboy	0:94897d537b31	12	* <h2><center>© COPYRIGHT 2009 CooCox </center></h2>
astroboy	0:94897d537b31	13	*******************************************************************************
astroboy	0:94897d537b31	14	*/
astroboy	0:94897d537b31	15
astroboy	0:94897d537b31	16	/---------------------------- Include ---------------------------------------/
astroboy	0:94897d537b31	17	#include <coocox.h>
astroboy	0:94897d537b31	18
astroboy	0:94897d537b31	19	/---------------------------- Variable Define -------------------------------/
astroboy	0:94897d537b31	20	volatile U8 OSIntNesting = 0; /!< Use to indicate interrupt nesting level/
astroboy	0:94897d537b31	21	volatile U8 OSSchedLock = 0; /!< Task Switch lock. /
astroboy	0:94897d537b31	22	volatile BOOL TaskSchedReq = Co_FALSE;
astroboy	0:94897d537b31	23
astroboy	0:94897d537b31	24
astroboy	0:94897d537b31	25	/**
astroboy	0:94897d537b31	26	*******************************************************************************
astroboy	0:94897d537b31	27	* @brief Enter a ISR.
astroboy	0:94897d537b31	28	* @param[in] None
astroboy	0:94897d537b31	29	* @param[out] None
astroboy	0:94897d537b31	30	* @retval None
astroboy	0:94897d537b31	31	*
astroboy	0:94897d537b31	32	* @par Description
astroboy	0:94897d537b31	33	* @details This function is called to notify OS when enter to an ISR.
astroboy	0:94897d537b31	34	*
astroboy	0:94897d537b31	35	* @note When you call API in ISR,you must call CoEnterISR() before your
astroboy	0:94897d537b31	36	* interrupt handler code,and call CoExitISR() after your handler
astroboy	0:94897d537b31	37	* code and before exiting from ISR.
astroboy	0:94897d537b31	38	*******************************************************************************
astroboy	0:94897d537b31	39	*/
astroboy	0:94897d537b31	40	void CoEnterISR(void)
astroboy	0:94897d537b31	41	{
astroboy	0:94897d537b31	42	Inc8(&OSIntNesting); /* OSIntNesting increment */
astroboy	0:94897d537b31	43	}
astroboy	0:94897d537b31	44
astroboy	0:94897d537b31	45
astroboy	0:94897d537b31	46	/**
astroboy	0:94897d537b31	47	*******************************************************************************
astroboy	0:94897d537b31	48	* @brief Exit a ISR.
astroboy	0:94897d537b31	49	* @param[in] None
astroboy	0:94897d537b31	50	* @param[out] None
astroboy	0:94897d537b31	51	* @retval None
astroboy	0:94897d537b31	52	*
astroboy	0:94897d537b31	53	* @par Description
astroboy	0:94897d537b31	54	* @details This function is called when exit from a ISR.
astroboy	0:94897d537b31	55	*
astroboy	0:94897d537b31	56	* @note
astroboy	0:94897d537b31	57	*******************************************************************************
astroboy	0:94897d537b31	58	*/
astroboy	0:94897d537b31	59	void CoExitISR(void)
astroboy	0:94897d537b31	60	{
astroboy	0:94897d537b31	61	Dec8(&OSIntNesting); /* OSIntNesting decrease */
astroboy	0:94897d537b31	62	if( OSIntNesting == 0) /* Is OSIntNesting == 0? */
astroboy	0:94897d537b31	63	{
astroboy	0:94897d537b31	64	if(TaskSchedReq == Co_TRUE)
astroboy	0:94897d537b31	65	{
astroboy	0:94897d537b31	66	OSSchedLock++;
astroboy	0:94897d537b31	67	Schedule(); /* Call task schedule */
astroboy	0:94897d537b31	68	OSSchedLock--;
astroboy	0:94897d537b31	69	}
astroboy	0:94897d537b31	70	}
astroboy	0:94897d537b31	71	}
astroboy	0:94897d537b31	72
astroboy	0:94897d537b31	73
astroboy	0:94897d537b31	74
astroboy	0:94897d537b31	75	/**
astroboy	0:94897d537b31	76	*******************************************************************************
astroboy	0:94897d537b31	77	* @brief Unlock schedule
astroboy	0:94897d537b31	78	* @param[in] None
astroboy	0:94897d537b31	79	* @param[out] None
astroboy	0:94897d537b31	80	* @retval None
astroboy	0:94897d537b31	81	*
astroboy	0:94897d537b31	82	* @par Description
astroboy	0:94897d537b31	83	* @details This function is called to unlock schedule(i.e.enable schedule again)
astroboy	0:94897d537b31	84	*
astroboy	0:94897d537b31	85	* @note
astroboy	0:94897d537b31	86	*******************************************************************************
astroboy	0:94897d537b31	87	*/
astroboy	0:94897d537b31	88	void OsSchedUnlock(void)
astroboy	0:94897d537b31	89	{
astroboy	0:94897d537b31	90	if(OSSchedLock == 1) /* Is OSSchedLock == 0? */
astroboy	0:94897d537b31	91	{
astroboy	0:94897d537b31	92	#if CFG_TASK_WAITTING_EN > 0
astroboy	0:94897d537b31	93	if(IsrReq == Co_TRUE)
astroboy	0:94897d537b31	94	{
astroboy	0:94897d537b31	95	RespondSRQ(); /* Respond service request */
astroboy	0:94897d537b31	96	}
astroboy	0:94897d537b31	97	#endif
astroboy	0:94897d537b31	98	/* Judge task state change or higher PRI task coming in */
astroboy	0:94897d537b31	99	if(TaskSchedReq == Co_TRUE)
astroboy	0:94897d537b31	100	{
astroboy	0:94897d537b31	101	Schedule(); /* Call task schedule */
astroboy	0:94897d537b31	102	}
astroboy	0:94897d537b31	103	OSSchedLock = 0;
astroboy	0:94897d537b31	104	}
astroboy	0:94897d537b31	105	else
astroboy	0:94897d537b31	106	{
astroboy	0:94897d537b31	107	OSSchedLock--;
astroboy	0:94897d537b31	108	}
astroboy	0:94897d537b31	109	}
astroboy	0:94897d537b31	110
astroboy	0:94897d537b31	111
astroboy	0:94897d537b31	112	/**
astroboy	0:94897d537b31	113	*******************************************************************************
astroboy	0:94897d537b31	114	* @brief Lock schedule
astroboy	0:94897d537b31	115	* @param[in] None
astroboy	0:94897d537b31	116	* @param[out] None
astroboy	0:94897d537b31	117	* @retval None
astroboy	0:94897d537b31	118	*
astroboy	0:94897d537b31	119	* @par Description
astroboy	0:94897d537b31	120	* @details This function is called in application code to lock schedule.
astroboy	0:94897d537b31	121	*
astroboy	0:94897d537b31	122	* @note
astroboy	0:94897d537b31	123	*******************************************************************************
astroboy	0:94897d537b31	124	*/
astroboy	0:94897d537b31	125	void CoSchedLock(void)
astroboy	0:94897d537b31	126	{
astroboy	0:94897d537b31	127	OsSchedLock(); /* Lock schedule */
astroboy	0:94897d537b31	128	}
astroboy	0:94897d537b31	129
astroboy	0:94897d537b31	130
astroboy	0:94897d537b31	131	/**
astroboy	0:94897d537b31	132	*******************************************************************************
astroboy	0:94897d537b31	133	* @brief Unlock schedule
astroboy	0:94897d537b31	134	* @param[in] None
astroboy	0:94897d537b31	135	* @param[out] None
astroboy	0:94897d537b31	136	* @retval None
astroboy	0:94897d537b31	137	*
astroboy	0:94897d537b31	138	* @par Description
astroboy	0:94897d537b31	139	* @details This function is called in APP to unlock schedule.
astroboy	0:94897d537b31	140	*
astroboy	0:94897d537b31	141	* @note
astroboy	0:94897d537b31	142	*******************************************************************************
astroboy	0:94897d537b31	143	*/
astroboy	0:94897d537b31	144	void CoSchedUnlock(void)
astroboy	0:94897d537b31	145	{
astroboy	0:94897d537b31	146	OsSchedUnlock(); /* Unlock schedule */
astroboy	0:94897d537b31	147	}
astroboy	0:94897d537b31	148
astroboy	0:94897d537b31	149
astroboy	0:94897d537b31	150	/**
astroboy	0:94897d537b31	151	*******************************************************************************
astroboy	0:94897d537b31	152	* @brief Initialize OS
astroboy	0:94897d537b31	153	* @param[in] None
astroboy	0:94897d537b31	154	* @param[out] None
astroboy	0:94897d537b31	155	* @retval None
astroboy	0:94897d537b31	156	*
astroboy	0:94897d537b31	157	* @par Description
astroboy	0:94897d537b31	158	* @details This function is called to initialize OS.
astroboy	0:94897d537b31	159	*
astroboy	0:94897d537b31	160	* @note You must call this function first,before any other OS API function
astroboy	0:94897d537b31	161	*
astroboy	0:94897d537b31	162	* @code There is a example for useage of this function,as follows:
astroboy	0:94897d537b31	163	* e.g.
astroboy	0:94897d537b31	164	* ... // Your target initial code.
astroboy	0:94897d537b31	165	*
astroboy	0:94897d537b31	166	* OsInit(); // Initial OS.
astroboy	0:94897d537b31	167	* CreateTask(...); // Create tasks.
astroboy	0:94897d537b31	168	* ...
astroboy	0:94897d537b31	169	* OsStart(); // Start multitask.
astroboy	0:94897d537b31	170	* @endcode
astroboy	0:94897d537b31	171	*******************************************************************************
astroboy	0:94897d537b31	172	*/
astroboy	0:94897d537b31	173	void CoInitOS(void)
astroboy	0:94897d537b31	174	{
astroboy	0:94897d537b31	175	InitSysTick(); /* Initialize system tick. */
astroboy	0:94897d537b31	176	InitInt(); /* Initialize PendSV,SVC,SysTick interrupt */
astroboy	0:94897d537b31	177	CreateTCBList(); /* Create TCB list. */
astroboy	0:94897d537b31	178	#if CFG_EVENT_EN > 0
astroboy	0:94897d537b31	179	CreateEventList(); /* Create event control list. */
astroboy	0:94897d537b31	180	#endif
astroboy	0:94897d537b31	181	#if CFG_KHEAP_EN > 0
astroboy	0:94897d537b31	182	CoCreateKheap(); /* Create kernel heap within user define */
astroboy	0:94897d537b31	183	#endif
astroboy	0:94897d537b31	184	OsSchedLock(); /* Lock Schedule */
astroboy	0:94897d537b31	185	/* Create first task -- IDLE task. */
astroboy	0:94897d537b31	186	CoCreateTask( CoIdleTask,
astroboy	0:94897d537b31	187	Co_NULL,
astroboy	0:94897d537b31	188	CFG_LOWEST_PRIO,
astroboy	0:94897d537b31	189	&idle_stk[CFG_IDLE_STACK_SIZE-1],
astroboy	0:94897d537b31	190	CFG_IDLE_STACK_SIZE
astroboy	0:94897d537b31	191	);
astroboy	0:94897d537b31	192	/* Set PSP for CoIdleTask coming in */
astroboy	0:94897d537b31	193	SetEnvironment(&idle_stk[CFG_IDLE_STACK_SIZE-1]);
astroboy	0:94897d537b31	194	}
astroboy	0:94897d537b31	195
astroboy	0:94897d537b31	196
astroboy	0:94897d537b31	197	/**
astroboy	0:94897d537b31	198	*******************************************************************************
astroboy	0:94897d537b31	199	* @brief Start multitask
astroboy	0:94897d537b31	200	* @param[in] None
astroboy	0:94897d537b31	201	* @param[out] None
astroboy	0:94897d537b31	202	* @retval None
astroboy	0:94897d537b31	203	*
astroboy	0:94897d537b31	204	* @par Description
astroboy	0:94897d537b31	205	* @details This function is called to start multitask.After it is called,
astroboy	0:94897d537b31	206	* OS start schedule task by priority or/and time slice.
astroboy	0:94897d537b31	207	* @note This function must be called to start OS when you use CoOS,and must
astroboy	0:94897d537b31	208	* call after CoOsInit().
astroboy	0:94897d537b31	209	*******************************************************************************
astroboy	0:94897d537b31	210	*/
astroboy	0:94897d537b31	211	void CoStartOS(void)
astroboy	0:94897d537b31	212	{
astroboy	0:94897d537b31	213	TCBRunning = &TCBTbl[0]; /* Get running task */
astroboy	0:94897d537b31	214	TCBNext = TCBRunning; /* Set next scheduled task as running task */
astroboy	0:94897d537b31	215	TCBRunning->state = TASK_RUNNING; /* Set running task status to RUNNING */
astroboy	0:94897d537b31	216	RemoveFromTCBRdyList(TCBRunning); /* Remove running task from READY list */
astroboy	0:94897d537b31	217	OsSchedUnlock(); /* Enable Schedule,call task schedule */
astroboy	0:94897d537b31	218	}
astroboy	0:94897d537b31	219
astroboy	0:94897d537b31	220
astroboy	0:94897d537b31	221	/**
astroboy	0:94897d537b31	222	*******************************************************************************
astroboy	0:94897d537b31	223	* @brief Get OS version
astroboy	0:94897d537b31	224	* @param[in] None
astroboy	0:94897d537b31	225	* @param[out] None
astroboy	0:94897d537b31	226	* @retval The value is version of OS mutipled by 100.
astroboy	0:94897d537b31	227	*
astroboy	0:94897d537b31	228	* @par Description
astroboy	0:94897d537b31	229	* @details This function is used to return the version number of CooCox OS.
astroboy	0:94897d537b31	230	* the return value corresponds to CooCox's version number multiplied
astroboy	0:94897d537b31	231	* by 100. In other words, version 1.02 would be returned as 102.
astroboy	0:94897d537b31	232	*******************************************************************************
astroboy	0:94897d537b31	233	*/
astroboy	0:94897d537b31	234	OS_VER CoGetOSVersion(void)
astroboy	0:94897d537b31	235	{
astroboy	0:94897d537b31	236	return OS_VERSION; /* Get CooCox CoOS version */
astroboy	0:94897d537b31	237	}
astroboy	0:94897d537b31	238

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	10 Sep 2011
Imports:	49
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	2
Followers:	2

CoOS/kernel/core.c@0:94897d537b31, 2011-09-10 (annotated)

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