anaumannJul 28, 2023

Per key RGB in ZMK on Seeedstudio Xiao BLE

https://lemmy.world/post/2265462

Per key RGB in ZMK on Seeedstudio Xiao BLE - Lemmy.world

Hey all. I am currently prototyping a keyboard with the Seeedstudio Xiao BLE (nrf52840). I configured the shield config correctly & got it working. However, my RGB won’t turn on (followed the ZMK documentation on RGB underglow) Does anybody have a pointer to a project that got RGB working with Seeedstudio Xiao BLE & RGB?

Show threadSkree
Are you feeding the leds with 5v or 3.3v? I’ve had issues with 5v and no shift registers as the led won’t pickup the high state of the leddata without a shift register.
Jul 28, 2023 at 7:20pmWeb
Show threadanaumannJul 29, 2023

See my other response for how I am driving the LEDs :) (Works fine with an Arduino program so that is not the issue here)

It seems to me that I get this line wrong: NRF_PSEL(SPIM_MOSI, 0, 16). I would read this as “Set pin P0.16 as SPI MOSI”, however I cannot find a pin P0.16 exposed on the Xiao BLE wiki.seeedstudio.com/XIAO_BLE/

Can you give me a pointer where I am wrong?

(my RGB pin is P1.11 / D6, so I would’ve assumed that I should change this to NRF_PSEL(SPIM_MOSI, 1, 11), I know that the use of low frequency pins is discouraged by ZMK docs)

Getting Started with XIAO nRF52840 | Seeed Studio Wiki

Getting Started with Seeed Studio XIAO nRF52840 (Sense)