NixOS on ARM/Raspberry Pi 4: Difference between revisions
Added instructions for getting bluetooth atleast usable
(→Troubleshooting: Added touch screen fix) |
(Added instructions for getting bluetooth atleast usable) |
||
| (One intermediate revision by the same user not shown) | |||
| Line 138: | Line 138: | ||
hardware.pulseaudio.enable = true; | hardware.pulseaudio.enable = true; | ||
hardware.raspberry-pi."4".audio.enable = true; | hardware.raspberry-pi."4".audio.enable = true; | ||
</nowiki>}} | |||
For audio through hdmi: | |||
{{file|/etc/nixos/configuration.nix|nix|<nowiki> | |||
sound.enable = true; | |||
hardware.pulseaudio.enable = true; | |||
boot.kernelParams = [ | |||
"snd_bcm2835.enable_hdmi=1"]; | |||
</nowiki>}} | </nowiki>}} | ||
| Line 173: | Line 182: | ||
To enable the SPI, you would normally add <code>dtparam=spi=on</code> to <code>/boot/config.txt</code>. | To enable the SPI, you would normally add <code>dtparam=spi=on</code> to <code>/boot/config.txt</code>. | ||
This is not | This is not possible on NixOS, and instead you have to apply a device tree overlay. | ||
For this we use the <code>hardware.deviceTree.overlays</code> option. | For this we use the <code>hardware.deviceTree.overlays</code> option. | ||
After applying the overlay, we add an <code>spi</code> group and change the owner of the <code>spidev</code> device to it, similarly to [[#Using GPIO pins as non root |GPIO]]. | After applying the overlay, we add an <code>spi</code> group and change the owner of the <code>spidev</code> device to it, similarly to [[#Using GPIO pins as non root |GPIO]]. | ||
| Line 253: | Line 262: | ||
}; | }; | ||
} | } | ||
</nowiki>}} | |||
=== Enabling Bluetooth === | |||
One might get bluetooth to work with this in the configuration file: | |||
{{file|/etc/nixos/configuration.nix|nix|<nowiki> | |||
systemd.services.btattach = { | |||
before = [ "bluetooth.service" ]; | |||
after = [ "dev-ttyAMA0.device" ]; | |||
wantedBy = [ "multi-user.target" ]; | |||
serviceConfig = { | |||
ExecStart = "${pkgs.bluez}/bin/btattach -B /dev/ttyAMA0 -P bcm -S 3000000"; | |||
}; | |||
}; | |||
</nowiki>}} | </nowiki>}} | ||