[CC2541] Weird LED shining

Arthur Eberhardt

Other Parts Discussed in Thread: CC2541

Hi,

I'm using SensorTag project from BLE Stack 1.4. When I push S2 button I call:

HalLedSet(HAL_LED_2,HAL_LED_MODE_ON);

Then the LED is not steady, it's blinking very fast... And if I put this code in button:

HalLedSet(HAL_LED_2,HAL_LED_MODE_ON);
while(1);

Then the LED is steady. So something else interacts with the LED but I cannot find what. Maybe some power management but I'm a beginner with CC2541 so I'm kind of lost in the project :s

Thanks for your help,

regards

over 9 years ago

0 Dhaval V over 9 years ago

Genius 4470 points

If you can check, on which port number that LED is connected and then search for that port across the project. You might get the idea where it is changed.

0 Peter Borenstein over 9 years ago in reply to Dhaval V

Mastermind 8695 points

Part of the sleep code turns the LED off. You're seeing you device go in and out of PM2. Look for this line somewhere:

HalLedSet(HAL_LED_ALL,HAL_LED_MODE_OFF);

And comment it out

0 Arthur Eberhardt over 9 years ago in reply to Peter Borenstein

Prodigy 130 points

Thanks for your answers.

I commented all HalLedSet but it doesn't solve the problem :s

where can I find the code that is executed before and after PM2 ?

Thanks

0 Dhaval V over 9 years ago in reply to Arthur Eberhardt

Genius 4470 points

Have you checked hal_sleep() function in hal_sleep.c file?

0 Arthur Eberhardt over 9 years ago in reply to Dhaval V

Prodigy 130 points

You were right, it was in HalLedEnterSleep that my LED was turned off.

Now it's working, thank you !

0 Peter Borenstein over 9 years ago in reply to Arthur Eberhardt

Mastermind 8695 points

Ctrl+Shift+F will help you find things

0 Dhaval V over 9 years ago in reply to Arthur Eberhardt

Genius 4470 points

Hi Arthur,

You can "Verify Answer" if your question is answered. :-)

Thanks,

Dhaval

0 Arthur Eberhardt over 9 years ago in reply to Dhaval V

Prodigy 130 points

Sorry :)

0 Peter Borenstein over 9 years ago in reply to Arthur Eberhardt

Mastermind 8695 points

I'm not feeling any love. You can verify two answers ;)

0 Arthur Eberhardt over 9 years ago in reply to Peter Borenstein

Prodigy 130 points

Sorry peter ! :)

0 ivang.boletus over 9 years ago in reply to Arthur Eberhardt

Prodigy 130 points

Hi,

So the problem was solved? I'm getting the same problem here. My led shines really weird but I don't understand how you solved that. I call HalLedSet( (HAL_LED_1), HAL_LED_MODE_ON ); when I push the HAL_KEY_SW_2 and it starts shining like blinking and very dim light.
I can't find where can be the line when the led could be called to sleep.
My examples is based in simpleBLEBroadcaster example.

EDITED:

Ok, I commented HalLedEnterSleep(); in the halSleep function and the led shines well now, but why this call is always called? is there any reason for that? Is it risky to comment that? If you can't use the led without commenting that I don't understand well why this call is included there.

Regards.

Iván

Bluetooth®︎

Bluetooth forum

[CC2541] Weird LED shining