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Underglow in ZMK on Seeedstudio Xiao BLE not working
(lemmy.world)
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this post was submitted on 28 Jul 2023
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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.
https://github.com/WainingForests/zmk-config-xiao/tree/Xiao_rgb I have successfully done LEDS just fine. Per key is a misnomer though. ZMK doesn't allow individually addressing each key. Instead, you'll be using underglow to apply effects to the whole "chain."
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 https://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)