/**
*
* This function returns the alarm event status by reading
* interrupt status register.
*
* @param InstancePtr is a pointer to the XRtcPsu instance.
*
* @return Returns 1 if the alarm event is generated.Else 0.
*
* @note This API is used in polled mode operation of RTC.
* This also clears interrupt status alarm bit.
*
*****************************************************************************/
u32 XRtcPsu_IsAlarmEventGenerated(XRtcPsu *InstancePtr)
{
u32 Status;
/* Loop the interrupt status register for Alarm Event */
if ((XRtcPsu_ReadReg(InstancePtr->RtcConfig.BaseAddr +
XRTC_INT_STS_OFFSET) & (XRTC_INT_STS_ALRM_MASK)) == 0U) {
Status = 0U;
} else {
/* Clear the interrupt status register */
XRtcPsu_WriteReg((InstancePtr)->RtcConfig.BaseAddr +
XRTC_INT_STS_OFFSET, XRTC_INT_STS_ALRM_MASK);
Status = 1U;
}
return Status;
}
/**
*
* This function is the interrupt handler for the driver.
* It must be connected to an interrupt system by the application such that it
* can be called when an interrupt occurs.
*
* @param InstancePtr contains a pointer to the driver instance
*
* @return None.
*
* @note None.
*
******************************************************************************/
void XRtcPsu_InterruptHandler(XRtcPsu *InstancePtr)
{
u32 IsrStatus;
Xil_AssertVoid(InstancePtr != NULL);
Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
/*
* Read the interrupt ID register to determine which
* interrupt is active.
*/
IsrStatus = ~(XRtcPsu_ReadReg(InstancePtr->RtcConfig.BaseAddr +
XRTC_INT_MSK_OFFSET));
IsrStatus &= XRtcPsu_ReadReg(InstancePtr->RtcConfig.BaseAddr +
XRTC_INT_STS_OFFSET);
/*
* Clear the interrupt status to allow future
* interrupts before this generated interrupt is serviced.
*/
XRtcPsu_WriteReg(InstancePtr->RtcConfig.BaseAddr +
XRTC_INT_STS_OFFSET, IsrStatus);
/* Handle the generated interrupts appropriately. */
/* Alarm interrupt */
if((IsrStatus & XRTC_INT_STS_ALRM_MASK) != (u32)0) {
if(InstancePtr->IsPeriodicAlarm != 0U) {
XRtcPsu_SetAlarm(InstancePtr,
(XRtcPsu_GetCurrentTime(InstancePtr)+InstancePtr->PeriodicAlarmTime),1U);
}
/*
* Call the application handler to indicate that there is an
* alarm interrupt. If the application cares about this alarm,
* it will act accordingly through its own handler.
*/
InstancePtr->Handler(InstancePtr->CallBackRef,
XRTCPSU_EVENT_ALARM_GEN);
}
/* Seconds interrupt */
if((IsrStatus & XRTC_INT_STS_SECS_MASK) != (u32)0) {
/* Set the CurrTimeUpdated flag to 1 */
InstancePtr->CurrTimeUpdated = 1;
if(InstancePtr->TimeUpdated == (u32)1) {
/* Clear the TimeUpdated */
InstancePtr->TimeUpdated = (u32)0;
}
/*
* Call the application handler to indicate that there is an
* seconds interrupt. If the application cares about this seconds
* interrupt, it will act accordingly through its own handler.
*/
InstancePtr->Handler(InstancePtr->CallBackRef,
XRTCPSU_EVENT_SECS_GEN);
}
}
