CC1314R10: Question related to entering into low power mode by manually calling Power_sleep(PowerCC26XX_STANDBY)

Prashant Dhule

Part Number: CC1314R10

Tool/software:

I have following questions about manually using Power_sleep(PowerCC26XX_STANDBY) as per application requirement
1.Did I need to suspend task before entering int standby mode
2. Did I need to close Watchdog Timer before entering standby mode or how watchdog is handled in standby mode
3. Is there any example of manually entering in low power mode using Power_sleep(PowerCC26XX_STANDBY)
4. Is there any example to wake from standby mode using GPIO interrupt

3 days ago

0 Marie H 2 days ago

TI__Guru* 82121 points

Hi Prashant,

I would not recommend you to use the Power_sleep() API at all.

If you use a power policy that allows it, the device will go to standby when all tasks are inactive. I.e. the APIs you use are typically sleep() and event/semaphore_pend().

1. If not the device will immediately wake up and execute the task.

2. No, there's no reason to close the watchdog before entering standby. In any case, your watchdog kick/pet callback should wake up the device and reset the watchdog timer before it expires.

3. No.

4. One example which shows you how to set up a GPIO interrupt and callback: GPIO Interrupt:

https://dev.ti.com/tirex/explore/node?node=A__AAsXTbj4blB-PJCQpmeuIg__com.ti.SIMPLELINK_CC13XX_CC26XX_SDK__BSEc4rl__LATEST&placeholder=true

One example that shows how to set up events and pend on external event (in standby): Button LED

https://dev.ti.com/tirex/explore/node?node=A__ANCLgRHcx2zazefquWHwJw__com.ti.SIMPLELINK_CC13XX_CC26XX_SDK__BSEc4rl__LATEST&placeholder=true

Cheers,

Marie H

0 Prashant Dhule 2 days ago in reply to Marie H

Prodigy 30 points

I would not recommend you to use the Power_sleep() API at all.

=> Could you tell me a bit more about why you’d avoid Power_sleep()?

To use a power policy that permits it, the device will enter standby when all tasks are inactive and switch to low power mode using Power_sleep(PowerCC26XX_STANDBY). What is your recommendation on this?

0 Marie H 2 days ago in reply to Prashant Dhule

TI__Guru* 82121 points

Hi Prashant,

It's not needed, and you're not really giving the device the condition for waking up from sleep.

If you use Task_sleep() or Event/semaphore_pend() in stead, the condition is very clear for when to wake up.

Cheers,

Marie H

0 Prashant Dhule 1 day ago in reply to Marie H

Prodigy 30 points

Hi Marie H

I want to implement a power policy that puts the device in standby when all tasks are inactive. I also want to manually call Power_sleep(PowerCC26XX_STANDBY) to enter standby mode and wake up using GPIO. Can I use both?

__PRESENT

0 Marie H 1 day ago in reply to Prashant Dhule

TI__Guru* 82121 points

Hi Prashant,

Yes you can.

Cheers,

Marie H

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CC1314R10: Question related to entering into low power mode by manually calling Power_sleep(PowerCC26XX_STANDBY)