NRF52832 Proper way to configure GPIO interrupts in NRF Connect

[Rait]

Hi all,

NRF52832
NRF Connect 2.6.0

We need to configure interrupts on a GPIO on both edges. There are several topics recommending to use GPIO_INT_TRIG_BOTH instead of GPIO_INT_EDGE_BOTH for power savings.

As discussed in the following topic this triggers an assert in Zephyr GPIO:

 RE: reducing current consumption of nrf5340 GPIO interrupts configured for edge triggering 

However, after actually measuring the power consumption, I can't see any difference between the two options. Is the recommendation still valid for NRF52832 with the latest NRF Connect?

Cheers

[Rait]

You are correct about Zephyr being a complex system. Unfortunately, mandating Zephyr is a decision Nordic made..

Figured it out.

The problem with the assert was caused by incorrect suggestion in the other topic (GPIO_INT_EDGE_FALLING -> GPIO_INT_TRIG_BOTH). Should have been GPIO_INT_EDGE_BOTH. 

 RE: reducing current consumption of nrf5340 GPIO interrupts configured for edge triggering 

Reason why the extra current consumption did not show up was because I still had the "sense-edge-mask" set in devicetree as it overrides the configuration. Seeing +4uA without it.

The extra documentation/example would still be very useful. Google gives 7 results total for "sense-edge-mask". Maybe in the "nrf\samples" folder.

[Sigurd Hellesvik]

Good job

Rait said:

Figured it out.

The problem with the assert was caused by incorrect suggestion in the other topic (GPIO_INT_EDGE_FALLING -> GPIO_INT_TRIG_BOTH). Should have been GPIO_INT_EDGE_BOTH. 

 RE: reducing current consumption of nrf5340 GPIO interrupts configured for edge triggering 

Reason why the extra current consumption did not show up was because I still had the "sense-edge-mask" set in devicetree as it overrides the configuration. Seeing +4uA without it.

Good job!
And thanks for explaining what you found!

Rait said:

The extra documentation/example would still be very useful. Google gives 7 results total for "sense-edge-mask". Maybe in the "nrf\samples" folder.

I will mention such a sample to my colleagues and see what we can do