posted August 28, 2001 13:57            

In v2.2.0 you can "overwrite" the built-in idle task with one of your tasks, as you suspected. But you need to do a little extra in order for OSCreateTask() to succeed. With your code, if you check the return value of

code:

---

OSCreateTask(DamperOpen,OSTCBP(4),1);

---

you'll find that it's returning an error, OSERR_BAD_P. That's because in v2.2.0 you can only create a task in an empty, initialized control block. With the freeware library you're using, the idle task is already in there ...

So, you can do it in one of two ways:

code:

---

OSDestroyTask(OSTCBP(4)));
OSCreateTask(DamperOpen,OSTCBP(4),1);

---

or

code:

---

OSInitTcb(OSTCBP(4));
OSCreateTask(DamperOpen,OSTCBP(4),1);

---

The first method is much safer. The second method will work only if it's done before any calls to OSSched().

posted August 28, 2001 12:39            

Even if I change the salvocfg.h to

code:

---

#if !defined (MAKE_WITH_FREE_LIB) && !defined (MAKE_WITH_STD_LIB)
/*                                                          */
/*  configuration options for project that's made using the */
/*  source files.                                           */
/*                                                          */
#define OSBYTES_OF_DELAYS				1
#define OSENABLE_SEMAPHORES				TRUE
#define OSEVENTS					2
#define OSTASKS						4
#define OSLOC_ALL					bank1
#else
/*                                                          */
/* configuration options for projects that are made using   */
/*  either the freeware or standard libraries. Multitasking */
/*  with delays and events, events services called only     */
/*  from background.                                        */
/*                                                          */
#define OSUSE_LIBRARY				TRUE
#ifdef MAKE_WITH_FREE_LIB
#define OSLIBRARY_TYPE				OSF
#elif defined(MAKE_WITH_STD_LIB)
#define OSLIBRARY_TYPE				OSL
#endif
#define OSLIBRARY_CONFIG 			OSA
#define OSLIBRARY_VARIANT			OSB
#define OSEVENTS				2
#define OSTASKS					4

#endif

---

The 4th task created will not run at all even with the highest proirity.

code:

---

void main(void)
{
		
	OSInit();				//Initialize OS
	
	OSEnableInts();
	
	OSCreateTask(TempCheck,OSTCBP(1),6);	//Create Tasks,unique#1,Priority 10
	OSCreateTask(Clockit,OSTCBP(2),8);	//Create Tasks,unique#1,Priority 10
	OSCreateTask(DamperClosed,OSTCBP(3),4);	//Create Tasks,unique#1,Priority 10
	OSCreateTask(DamperOpen,OSTCBP(4),1);	//Create Tasks,unique#1,Priority 10
	
	OSCreateSem(DAMPER_OPEN,0);	
	OSCreateSem(DAMPER_CLOSED,0);

	PORTB=0;
	PORTA=0;
	TRISB=0;
	TRISA=1;
	while(1)				//do this forever
	{
		OSSched();			//new way, just call OS Scheduler
		OSTimer();
	}
}

---

[This message has been edited by srhoar (edited August 28, 2001).]

[This message has been edited by srhoar (edited August 28, 2001).]

[This message has been edited by srhoar (edited August 28, 2001).]