P0.17 on nRF52840

RE: P0.17 on nRF52840

higherkuo — Fri, 20 Sep 2019 05:39:00 GMT

Turns out this is a measuring error, everything is good :)

RE: P0.17 on nRF52840

haakonsh — Wed, 18 Sep 2019 09:17:35 GMT

Also this :)

RE: P0.17 on nRF52840

awneil — Wed, 18 Sep 2019 09:08:19 GMT

[quote userid="83476" url="~/f/nordic-q-a/52274/p0-17-on-nrf52840"]I tried something (sic) like this[/quote]

It would be better if you showed exactly what you tried!

Also, if you run the same code on a known-good board - does it work?

RE: P0.17 on nRF52840

haakonsh — Wed, 18 Sep 2019 07:56:55 GMT

I suggest you enter debug mode and verify that the PORT0's PIN_CNF[17] registers is set correctly after you've called nrf_gpio_cfg_output(17), and that PORT0's OUT register shows a toggling pin. Do note that you will need to halt the cpu in order to read the registers, so set a breakpoint after the configuration and after each toggling of the pin.

If you can verify that the registers behave as we expect then we're most likely looking at a soldering or ESD issue. A scope of the pin when it's toggling can be useful.