Matrix keyboard IO select

RE: Matrix keyboard IO select

JONATHAN LL — Wed, 30 Jun 2021 08:12:44 GMT

Hi,

We only support 8 channels on the nrf52840

We do have a HID Keyboard example, here is the nr5 SDK and here is the NCS version.

One pin that you might not want to use is the reset pin/P0.18. If you wan to have the reset function available.

I do recommend that you star with a nrf52840 DK to test develop the software.

Regards,
Jonathan

RE: Matrix keyboard IO select

LocalHost — Wed, 30 Jun 2021 01:08:07 GMT

hi，

Thank you for your reply，but i see the nRFready Smart Remote 3 nRF52 v1.2.1alpha software，it looks like use gpiote 8 channel to driver 8*8 matrix keyboard，so i use 8*18 matrix the gpiote is it possible to drive ? and software scope of pin is p0.0 to p0.31，do I also use this range pin to convenient software development？

RE: Matrix keyboard IO select

JONATHAN LL — Tue, 29 Jun 2021 14:07:01 GMT

Hi,

All the Pins that can be used as GPIOS can be used
https://infocenter.nordicsemi.com/topic/ps_nrf52840/gpio.html?cp=4_0_0_5_8

So all the pins that is listed as General purpose I/O is ok
https://infocenter.nordicsemi.com/topic/ps_nrf52840/pin.html?cp=4_0_0_6_0

There are some public projects out like the nrfmicro

Regards
Jonathan