/*-----------------------------------------------------------*/
portBASE_TYPE xPortStartScheduler( void )
{
pxISR pxOriginalTickISR;
/* This is called with interrupts already disabled. */
/* Remember what was on the interrupts we are going to use
so we can put them back later if required. */
pxOldSwitchISR = _dos_getvect( portSWITCH_INT_NUMBER );
pxOriginalTickISR = _dos_getvect( portTIMER_INT_NUMBER );
pxOldSwitchISRPlus1 = _dos_getvect( portSWITCH_INT_NUMBER + 1 );
prvSetTickFrequency( configTICK_RATE_HZ );
/* Put our manual switch (yield) function on a known
vector. */
_dos_setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );
/* Put the old tick on a different interrupt number so we can
call it when we want. */
_dos_setvect( portSWITCH_INT_NUMBER + 1, pxOriginalTickISR );
/* The ISR used depends on whether the preemptive or cooperative
scheduler is being used. */
#if( configUSE_PREEMPTION == 1 )
{
/* Put our tick switch function on the timer interrupt. */
_dos_setvect( portTIMER_INT_NUMBER, prvPreemptiveTick );
}
#else
{
/* We want the timer interrupt to just increment the tick count. */
_dos_setvect( portTIMER_INT_NUMBER, prvNonPreemptiveTick );
}
#endif
/* Setup a counter that is used to call the DOS interrupt as close
to it's original frequency as can be achieved given our chosen tick
frequency. */
sDOSTickCounter = portTICKS_PER_DOS_TICK;
/* Clean up function if we want to return to DOS. */
if( setjmp( xJumpBuf ) != 0 )
{
prvExitFunction();
xSchedulerRunning = pdFALSE;
}
else
{
xSchedulerRunning = pdTRUE;
/* Kick off the scheduler by setting up the context of the first task. */
portFIRST_CONTEXT();
}
return xSchedulerRunning;
}
/*-----------------------------------------------------------*/
BaseType_t xPortStartScheduler( void )
{
/* This is called with interrupts already disabled. */
/* Remember what was on the interrupts we are going to use
so we can put them back later if required. */
pxOldSwitchISR = _dos_getvect( portSWITCH_INT_NUMBER );
/* Put our manual switch (yield) function on a known
vector. */
_dos_setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );
#if configUSE_PREEMPTION == 1
{
/* Put our tick switch function on the timer interrupt. */
_dos_setvect( portTIMER_INT_NUMBER, prvPreemptiveTick );
}
#else
{
/* We want the timer interrupt to just increment the tick count. */
_dos_setvect( portTIMER_INT_NUMBER, prvNonPreemptiveTick );
}
#endif
prvSetTickFrequency( configTICK_RATE_HZ );
/* Clean up function if we want to return to DOS. */
if( setjmp( xJumpBuf ) != 0 )
{
prvExitFunction();
sSchedulerRunning = pdFALSE;
}
else
{
sSchedulerRunning = pdTRUE;
/* Kick off the scheduler by setting up the context of the first task. */
portFIRST_CONTEXT();
}
return sSchedulerRunning;
}
