RTOS/CC1352P: Power notification functions, what can I do in it ?

Clement Guillou

Intellectual 430 points

Part Number: CC1352P

Tool/software: TI-RTOS

Hello everyone,

I'm having an issue with a power notification functions.

I register a function to enter sleep and another for exit sleep (with Power_registerNotify), but if I do

GPIO_write(GPIO_LED_RED, BOARD_GPIO_LED_OFF);

it will have really bad consequences on my RTC interrupts timings, only if the target is not connected via JTAG, it works fine when running with JTAG debugger.

Can you explain why the action of writing a GPIO might have such consequences on the RTC ?

And correct me if I'm wrong, it work with JTAG debug because when in this mode, the micro doesn't actually go into standby mode ?

Thanks for your answers, best regards,

Clement

over 6 years ago

0 RGW over 6 years ago

TI__Mastermind 33490 points

Hi,

Can you confirm that the 32 kHz crystal is operational ?

Can you share your schematic ?

Regards,
Richard

0 Clement Guillou over 6 years ago in reply to RGW

Intellectual 430 points

Yes, I can confirm that the 32kHz is operational.

The thing is :
- with GPIO_write in the notification function and WITH the JTAG, it works fine
- with GPIO_write in the notification function and WITHOUT the JTAG, it fails
- without GPIO_write in the notification and with or without the JTAG it works fine.

I don't have a schematic that I can share here to provide...

Best regards,
Clement

0 IUsedToBeARealPerson (M-W) over 6 years ago in reply to Clement Guillou

TI__Guru 58425 points

Hi Clement,

Could you specify exactly what is happening in terms of "bad consequences"? Could you possibly put together a small test project (based on the empty example) where you re-create what you see and share that?

0 Clement Guillou over 6 years ago in reply to IUsedToBeARealPerson (M-W)

Intellectual 430 points

Hello M-W,

When I say "bad consequences" I mean that my interrupts seem to trigger at odd times.
When it works fine, I have a precise trigger, at consistant times, but when i'm with the disconnected JTAG, this trigger isn't consistant any more.
It triggers at times I do not understand. This behaviour disappears if I stop writing output on GPIOs...

I'll try to setup a light soft with empty example when I come back from holidays (early Jan.) if I can.

Best regards,
Clement

0 IUsedToBeARealPerson (M-W) over 6 years ago in reply to Clement Guillou

TI__Guru 58425 points

Hi Clement,

Thanks for the clarification, it do sound strange, what is the magnitude of the "odd times", is it a matter of micro seconds or is it more?
If you could put together the "Light example" I will have a look at it.

0 Clement Guillou over 6 years ago in reply to IUsedToBeARealPerson (M-W)

Intellectual 430 points

Hello MW,

By odd times, I mean that they seem to be erratic. The changes are at least a few hundreds of milliseconds, as I can clearly see it on a blinking LED.
I couldn't find time to do a light soft to reproduce this behaviour. I'll try to do it as soon as I can.

Best Regards,

Clement

0 IUsedToBeARealPerson (M-W) over 6 years ago in reply to Clement Guillou

TI__Guru 58425 points

Welcome back Clement,

I will be awaiting your example, I can't think if anything directly that would cause this behavior so having your example code to look at would be helpful.

0 IUsedToBeARealPerson (M-W) over 6 years ago in reply to Clement Guillou

TI__Guru 58425 points

Hi Clement,

Have you had time to put together an example?

0 IUsedToBeARealPerson (M-W) over 6 years ago in reply to IUsedToBeARealPerson (M-W)

TI__Guru 58425 points

Hi Clement,

I will close this thread for now due to inactivity . When you have the chance to re-visit this, feel free to keep posting in this thread or open a new one using the "Ask a related question" function and we can continue on in a new thread.

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RTOS/CC1352P: Power notification functions, what can I do in it ?