CCS/CC2650: Problem with MCU waking up from Standby mode

Hyunsoo Kim53

Part Number: CC2650

Tool/software: Code Composer Studio

I have this line of code at the end of the main application loop.

Util_startClock(&standbyClock);
Semaphore_pend(kSem, BIOS_WAIT_FOREVER);

standbyClock is a one shot timer configured as such.

Util_constructClock(&standbyClock, Standby_clockHandler, 60000, 0, false, NULL);

The idea is to put a minute of sleep between each iteration. standbyClock posts kSem.

I can see that kSem pend puts the MCU to sleep since the current draw goes near zero but the MCU does not wake up after a minute.

Does the sleep mode blocks the one shot timer from firing?

over 9 years ago

0 JXS over 9 years ago

TI__Guru** 105180 points

Hello,

Although you have not provided all of your code changes, it's likely you have deadlocked the app task by not posting the kSem in your clock handler. Have you confirmed that you have posted the kSem?

Best wishes

0 Hyunsoo Kim53 over 9 years ago in reply to JXS

Intellectual 550 points

I have this in my code.

static void Standby_clockHandler(UArg arg)
{
	Semaphore_post(kSem);
}

I think this posts kSem.

0 Hyunsoo Kim53 over 9 years ago in reply to Hyunsoo Kim53

Intellectual 550 points

Hello, anyone out there who can help me?

0 Christin Lee over 9 years ago in reply to Hyunsoo Kim53

TI__Guru 57745 points

Are you using custom HW? Does your application build on top of BLE examples?
Can you set a break point in your callback to see if it ever enters?

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CCS/CC2650: Problem with MCU waking up from Standby mode