Nrf9160 External Pin Interrupt Issue in PSM Mode

RE: Nrf9160 External Pin Interrupt Issue in PSM Mode

Sigurd — Thu, 06 Oct 2022 10:28:28 GMT

[quote user="Cosar"]- The pink is normally HIGH, connected to VDD_GPIO with 10 K resistor. It goes low when a trigger occurs. We also tried connecting sensor pin directly to GPIO26 with internal pull-up enabled but the results are the same.[/quote]

Ok, so you have measured that the when it's 'high', it's actually reaching VDD_GPIO.

How does your button_callback() function looks like? Anything there that could be blocking? or somehow explain the behavior you are seeing?

RE: Nrf9160 External Pin Interrupt Issue in PSM Mode

Cosar — Mon, 03 Oct 2022 17:29:31 GMT

Hi,

Here are the details ;

1) What SDK version are you using?

- 1.9.1

2) What pin number are you using for the sensor?

- GPIO26

3) What is the voltage of the pin when it goes high again?

- The pink is normally HIGH, connected to VDD_GPIO with 10 K resistor. It goes low when a trigger occurs. We also tried connecting sensor pin directly to GPIO26 with internal pull-up enabled but the results are the same.

RE: Nrf9160 External Pin Interrupt Issue in PSM Mode

Sigurd — Mon, 03 Oct 2022 14:51:12 GMT

1) What SDK version are you using?

2) What pin number are you using for the sensor?

[quote user=""]The sensor outputs its state in digital mode HIGH or LOW.[/quote]

What is the voltage of the pin when it goes high again?

RE: Nrf9160 External Pin Interrupt Issue in PSM Mode

Cosar — Mon, 03 Oct 2022 14:08:32 GMT

Hi!

Yes the pin is asserted low. The problem occurs mostly after 15-20 minutes of psm mode transition. It works well in first 15-20 minutes and it starts not to catch interrupts after that period.

Is there any other interrupt setting for a more stable external interrupt action?

RE: Nrf9160 External Pin Interrupt Issue in PSM Mode

Sigurd — Mon, 03 Oct 2022 13:37:37 GMT

Hi,

PSM mode should not affect this. Are you sure there is a pin transition from high to low ? Maybe the pin was kept low for some reason?