Hi. It's probably a bit late. On OrangePi Zero2 thereis i2c3 interface. Thus you must create your own DT overlay for i2c3 interface. See https://github.com/armbian/sunxi-DT-overlays/blob/master/sun50i-h6/sun50i-h6-i2c2.dts as an example. Let's say you create file sun50i-h6-i2c3.dts:
/dts-v1/;
/plugin/;
/ {
compatible = "allwinner,sun50i-h6";
fragment@0 {
target-path = "/aliases";
__overlay__ {
i2c3 = "/soc/i2c@5002c00";
};
};
fragment@1 {
target = <&i2c3>;
__overlay__ {
pinctrl-names = "default";
pinctrl-0 = <&i2c3_ph_pins>;
status = "okay";
};
};
};
Compile this file into a binary device-tree overlay blob:
dtc -I dts -O dtb -o sun50i-h6-i2c3.dtbo sun50i-h6-i2c3.dts
Set permmissions and copy compiled file into /boot/dtb/allwinner/overlay:
chmod +x ./sun50i-h6-i2c3.dtbo
sudo cp ./sun50i-h6-i2c3.dtbo /boot/dtb/allwinner/overlay
Then use the following in your armbianEnv.txt:
overlay_prefix=sun50i-h6
overlay=i2c3
serg_stetsuk got a reaction from mantouboji in Unable to get i2c connection to work on Orange Pi Zero 2