xTimerChangePeriod - Hanging up doesn't appear to return

Kernel
1

Hi,

I have a timer (getTimeUpdateTmr) that sets a flag to initiate a real time clock update every 6 hours.

#define UPDATE_TIME_INTERVAL (6 * 3600 * 1000)

__inline setTimeError_t setRTC_ToNetworkTimeDate(const bool printToUart, bool* validTime)
{
	struct tm *gtime;

	wiFiPars.networkBusy = true;
	xTimerChangePeriod(getTimeUpdateTmr, UPDATE_TIME_INTERVAL, 50); /* TODO */

If I have an error in the update routine I wish to change the getTimeUpdateTmr’s duration to a shorter value to cause the RTC update to occur more often.

At the start of the RTC update function (setRTC_ToNetworkTimeDate) I set the timer back to 6 Hours; the UPDATE_TIME_INTERVAL.

However the xTimerChangePeriod causes the system to hang in the xTimerGenericCommand.


BaseType_t xTimerGenericCommand( TimerHandle_t xTimer, const BaseType_t xCommandID, const TickType_t xOptionalValue, BaseType_t * const pxHigherPriorityTaskWoken, const TickType_t xTicksToWait )
{
BaseType_t xReturn = pdFAIL;
DaemonTaskMessage_t xMessage;

	configASSERT( xTimer ); <<<< hangs here

	/* Send a message to the timer service task to perform a particular action
	on a particular timer definition. */
	if( xTimerQueue != NULL )

The setRTC_ToNetworkTimeDate is called from a statically defined task. I do not call any functions from interrups apart from notifications and sem’s. The system runs fine without the xTimerChangePeriod included in the build.

WIFI_StatusTypeDef startWiFiSystem()
{
	wiFiTskHandle = xTaskCreateStatic( wiFiTask,
									 "wifiTask",
									 STACK_SIZE_WIFI_TASK,
									 NULL,
									 PRIO_WI_FI_TASK,   /* TODO - Review priorities */
									 wiFiTaskStack,
									 &wiFiTskBuffer);
	if(wiFiTskHandle == NULL)
	{
		return WIFI_XPORT_TASK_FAILED;
	}

	rtosTaskStates.wiFiTask = eRunning;
#if(ENABLE_COMMS_TIMEOUT == 1)
#endif
	return WIFI_OK;
}

The wiFiTask calls the setRTC_ToNetworkTimeDate when the getTimeUpdateTmr function callback set the flag read by the wiFiTask.

I’m not sure what I am doing wrong, any ideas?

Best regards
Rob

2

This assert means that xTimer is NULL. Can you check if the timer handle that you are passing is valid?

3

Hi,

Thanks

Will do.

Regards

Rob

4

Hi,

Fixed it. Hadn’t initialized the time before the first call to the function.

Silly me!

Regards
Rob

5

Thank you for reporting back!