CCS/TM4C1231E6PM: Hibernation RTC match0 ISR missing after setting RTC clock counter equal to HIBRTCM0.

Part Number: TM4C1231H6PM

Tool/software: Code Composer Studio

hi

I have created a Hibernation RTC match0 ISR (No Hibernation),  and set RTC match0 to 10 seconds after each ISR trigger.

It worked all the time until once I update the RTC value equal to exactly the next match0 value. The Interrupt will occur once after the setting but missing the following interrupts.

In this case, Do I need  to disable the interrupt in Interrupt handler and enable interrupt after settting the next  HIBRTCM0 value all the time?

or any else work around?

Main()
{
   SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);
   SysCtlPeripheralSleepEnable(SYSCTL_PERIPH_HIBERNATE);
   SysCtlPeripheralDeepSleepEnable(SYSCTL_PERIPH_HIBERNATE);   

   xTaskCreate (MonitorTask, (signed portCHAR *)"MonitorTask", 240, NULL, 4 , NULL);

   vTaskStartScheduler();
   while(1)  
   {        
   }
}

void MonitorTask( void *pvParameters )
{
	HibernateIntClear(HIBERNATE_INT_RTC_MATCH_0);
	IntPrioritySet(INT_HIBERNATE, 6<<5);
	HibernateIntRegister(IntRTCIntHandler);

    HibernateRTCMatch0Set(HibernateRTCGet() + 10); 
    HibernateIntEnable(HIBERNATE_INT_RTC_MATCH_0);

    g_xMonitorQueue = xQueueCreate( 4 , sizeof(tMonitorTrigSource ) );
    
    for(;;)
    {
        xQueueReceive( g_xMonitorQueue,  &MonitorTrigSource, portMAX_DELAY );
        if(MonitorTrigSource == Monitor_Trig_IntRTC)
        {
		     // Doing main code.
             HibernateRTCMatch0Set(HibernateRTCGet() + 10); 
        }
    }
}

void IntRTCIntHandler(void)
{
    unsigned long ulHibernateIntValue;
    signed portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;

    ulHibernateIntValue = HibernateIntStatus(true);

    if (ulHibernateIntValue & HIBERNATE_INT_RTC_MATCH_0)
    {
    tMonitorTrigSource MonitorTrigSource = Monitor_Trig_IntRTC;             
	HibernateIntClear(HIBERNATE_INT_RTC_MATCH_0);
    xQueueSendFromISR( g_xMonitorQueue, ( void * ) &MonitorTrigSource, &xHigherPriorityTaskWoken );

    if (xHigherPriorityTaskWoken != pdFALSE ) 
    {
         taskYIELD();
    }
}

void UpdateRTC(unsigned long ulRTC)   // Update RTC equal to match0 value occur that problem
{
	HibernateRTCSet(ulRTC);	
}

Hi Ralph :

It doesn't work.

Still no interrupt request after one RTC match.