RTOS/CC2640R2F: Releasing GPIO dependency when entering standby mode

Luzian Hug

Part Number: CC2640R2F

Tool/software: TI-RTOS

Hello,

I am working on a CC2640R2F custom board powered by an Energy Harvesting generator. The generator is not running all the time, and when it isn't running the device runs off a buffer capacitor. When the generator is off, I would like to enter the Standby power mode. When it is turned back on, the application needs to return to active mode. This is detected via a pin interrupt on a pin with PINCC26XX_WAKEUP_NEGEDGE enabled.

For entering standby mode I need to release all dependencies on the peripherals (Specifically, PowerCC26XX_PERIPH_GPIO). I saw that Power_setDependency(PowerCC26XX_PERIPH_GPIO) is called within the PIN_init() function. However, PIN_close() does not release the dependency again.

My question is: how do I make sure this dependency is released while still being able to wake up the application via the wakeup interrupt?

Thanks for your help
-Luzian

over 6 years ago

0 SVS over 6 years ago

TI__Genius 9705 points

Hi,

Have you looked at this example already?

http://dev.ti.com/tirex/explore/node?node=AIN-Sw2vGCVBh9nwmt3V.w__krol.2c__LATEST

The following document also provides information about entering standby mode:

http://www.ti.com/lit/ug/swra486/swra486.pdf

Regards,

0 Markel Robregado over 6 years ago

Guru 86755 points

Hi Luzian,

If you put the device in Shutdown Mode, the current consumption will be lower compared to Standby Mode.

-kel

0 Luzian Hug over 6 years ago in reply to SVS

Prodigy 90 points

Hi SVS,
I looked at the example. I can't use the unistd sleep function because I don't know for how long I will be in standby mode. I want to use TI's PowerCC26XX_standbyPolicy, which enters standby automatically when the constraints and dependencies allow it. At the moment I call Power_releaseDependency(PowerCC26XX_PERIPH_GPIO) and Power_setDependency(PowerCC26XX_PERIPH_GPIO) from the application directly on powerdown and powerup events, which seems to work fine, although I would prefer a more elegant solution.. Just calling PIN_close does not seem to automatically release the dependency.

0 Luzian Hug over 6 years ago in reply to Markel Robregado

Prodigy 90 points

Hi kel,
I know, but I would like to keep SRAM and sensor controller which is only possible using standby.

0 SVS over 6 years ago in reply to Luzian Hug

TI__Genius 9705 points

Hi,

Are you still looking for a solution? Following post might help with further ideas.
e2e.ti.com/.../609280

Regards,

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RTOS/CC2640R2F: Releasing GPIO dependency when entering standby mode