/**
*
* This function is the handler which handles the PWM interrupt.
*
* It updates the match register to reflect the change on duty cycle. It also
* disable interrupt at the end. The interrupt will be enabled by the Ticker
* timer counter.
*
* @param CallBackRef contains a callback reference from the driver, in
* this case it is a pointer to the MatchValue variable.
*
* @return None.
*
* @note None.
*
*****************************************************************************/
static void PWMHandler(void *CallBackRef)
{
u32 *MatchReg;
u32 StatusEvent;
XTtcPs *Timer;
MatchReg = (u32 *) CallBackRef;
Timer = &(TtcPsInst[TTC_PWM_DEVICE_ID]);
/*
* Read the interrupt status, then write it back to clear the interrupt.
*/
StatusEvent = XTtcPs_GetInterruptStatus(Timer);
XTtcPs_ClearInterruptStatus(Timer, StatusEvent);
if (0 != (XTTCPS_IXR_INTERVAL_MASK & StatusEvent)) {
XTtcPs_SetMatchValue(Timer, 0, *MatchReg);
}
else {
/*
* If it is not Interval event, it is an error.
*/
ErrorCount++;
}
XTtcPs_DisableInterrupts(Timer, XTTCPS_IXR_ALL_MASK);
}
/**
*
* This function is the handler which handles the periodic tick interrupt.
* It updates its count, and set a flag to signal PWM timer counter to
* update its duty cycle.
*
* This handler provides an example of how to handle data for the TTC and
* is application specific.
*
* @param CallBackRef contains a callback reference from the driver, in
* this case it is the instance pointer for the TTC driver.
*
* @return None.
*
* @note None.
*
*****************************************************************************/
static void TickHandler(void *CallBackRef)
{
u32 StatusEvent;
/*
* Read the interrupt status, then write it back to clear the interrupt.
*/
StatusEvent = XTtcPs_GetInterruptStatus((XTtcPs *)CallBackRef);
XTtcPs_ClearInterruptStatus((XTtcPs *)CallBackRef, StatusEvent);
if (0 != (XTTCPS_IXR_INTERVAL_MASK & StatusEvent)) {
TickCount++;
if (TICKS_PER_CHANGE_PERIOD == TickCount) {
TickCount = 0;
PWM_UpdateFlag = TRUE;
}
}
else {
/*
* The Interval event should be the only one enabled. If it is
* not it is an error
*/
ErrorCount++;
}
}
void platform_clear_interrupt( XTtcPs * TimerInstance )
{
u32 StatusEvent;
StatusEvent = XTtcPs_GetInterruptStatus(TimerInstance);
XTtcPs_ClearInterruptStatus(TimerInstance, StatusEvent);
}
void vClearTickInterrupt( void )
{
volatile uint32_t ulInterruptStatus;
/* Read the interrupt status, then write it back to clear the interrupt. */
ulInterruptStatus = XTtcPs_GetInterruptStatus( &xRTOSTickTimerInstance );
XTtcPs_ClearInterruptStatus( &xRTOSTickTimerInstance, ulInterruptStatus );
__asm volatile( "DSB SY" );
__asm volatile( "ISB SY" );
}
static void TickHandler(void *CallBackRef)
{
u32 StatusEvent;
/*
* Read the interrupt status, then write it back to clear the interrupt.
*/
StatusEvent = XTtcPs_GetInterruptStatus((XTtcPs *)CallBackRef);
XTtcPs_ClearInterruptStatus((XTtcPs *)CallBackRef, StatusEvent);
CountTimerTTC++;
}
static void prvTimerHandler( void *pvCallBackRef )
{
uint32_t ulInterruptStatus;
XTtcPs *pxTimer = ( XTtcPs * ) pvCallBackRef;
BaseType_t xYieldRequired;
/* Read the interrupt status, then write it back to clear the interrupt. */
ulInterruptStatus = XTtcPs_GetInterruptStatus( pxTimer );
XTtcPs_ClearInterruptStatus( pxTimer, ulInterruptStatus );
/* Only one interrupt event type is expected. */
configASSERT( ( XTTCPS_IXR_INTERVAL_MASK & ulInterruptStatus ) != 0 );
/* Check the device ID to know which IntQueue demo to call. */
if( pxTimer->Config.DeviceId == xDeviceIDs[ 0 ] )
{
xYieldRequired = xFirstTimerHandler();
}
else if( pxTimer->Config.DeviceId == xDeviceIDs[ 1 ] )
{
xYieldRequired = xSecondTimerHandler();
}
else
{
/* The high frequency timer is also used to generate the time base for
the run time state. */
ulHighFrequencyTimerCounts++;
/* Latch the highest interrupt nesting count detected. */
if( ulPortInterruptNesting > ulMaxRecordedNesting )
{
ulMaxRecordedNesting = ulPortInterruptNesting;
}
xYieldRequired = pdFALSE;
}
/* If xYieldRequired is not pdFALSE then calling either xFirstTimerHandler()
or xSecondTimerHandler() resulted in a task leaving the blocked state and
the task that left the blocked state had a priority higher than the currently
running task (the task this interrupt interrupted) - so a context switch
should be performed so the interrupt returns directly to the higher priority
task. xYieldRequired is tested inside the following macro. */
portYIELD_FROM_ISR( xYieldRequired );
}
