brane212 / tablet-pc-rotation Goto Github PK

The goal of this program is to rotate the display of my Linux convertible laptop every time I rotate it, like going from normal mode to tent mode, or landscape <=> portrait and adjust/disable/re-enable the various inputs/output (touchscreen, touchpad, keyboard) accordingly.

Linux sysfs exposes the various accelerometer analog values via the Linux IIO subsystem. The iio exposes values produced by the analog device and performs a Analog to Digital Conversion (ADC). So it's a poll model, I think there's no way of getting notified when the values change. I've found some interesting documentation about the IIO subsystem here: https://wiki.analog.com/software/linux/docs/iio/iio

In my laptop (Lenovo Yoga C940) there's only one accelerometer that captures the screen orientation in space in the 3 axes (x y z). The code details the meaning of these values.

This program is an adaptation of the python script rotate.py referenced in the Arch Linux wiki: https://gist.githubusercontent.com/ei-grad/4d9d23b1463a99d24a8d/raw/rotate.py It's also an attempt to learn Rust by doing something useful for me.

• You need a working Rust installation, X.org, xinput and xrandr. Check your distribution on how to install them.
• Clone this repository
• cargo run --release
• Rotate your 2-in-1 laptop and see what happens!