Original Source : https://firmburrow.rabbitu.de/retr0id/ms35774
First Published on : May 30, 2024 at 00:52 AM GMT+2
The MS35774 is a stepper motor driver IC. CORN R1 uses it to drive the rotation of the "360 degree camera" (although it's a 180 degree camera, really!)
CORN R1 has a Linux kernel driver for it, compiled into the kernel image (not built as a module).
This repo contains reverse-engineering notes & a reimplemented kernel driver by DavidBuchanan314.
The driver exposes a simple sysfs interface at /sys/devices/platform/step_motor_ms35774/orientation, where you can write a decimal integer in the range 0-180 (inclusive), and it'll rotate the motor accordingly.