Trimui Input Daemon

User-space input daemon for the Trimui family (Smart Pro, Smart Pro S, Brick). It reads the device-specific GPIO/serial inputs, publishes a unified uinput gamepad, and supports rumble on the supported A133-based hardware.

Features

• Auto-detects Smart Pro, Smart Pro S, or Brick at startup.
• Maps physical buttons, triggers, sticks, and hat to a single virtual gamepad.
• Rumble for A133-based units through the GPIO 227 and Smart Pro S PWM-vibrator backends.
• Upstream joystick calibration files with per-axis min/max/center values and normalized deadzone support.
• Learned calibration fallback when no upstream calibration file is available.

Building

The repo ships with a cross-compilation container. From the project root:

docker compose up --build

If you are using an x86 host, you might need to run this first:

docker run --privileged --rm tonistiigi/binfmt --install arm64

If you prefer a native toolchain, install gcc, make, and standard headers for your aarch64 rootfs, then run:

make clean && make

The native build outputs to build/trimui_inputd/bin/trimui_inputd.

Running

• Requires access to /dev/uinput, serial ports (/dev/ttyS3/4 or /dev/ttyAS5/7), /dev/mem (Brick GPIO), and /sys/class/gpio (A133 rumble).
• Run the built binary as root (or with the needed capabilities):

sudo ./build/trimui_inputd/bin/trimui_inputd

The daemon auto-detects the connected Trimui variant and starts polling.

Configuration

• BRICK_ACTIVE_LOW=0 forces Brick buttons to be treated as active-high (defaults to active-low).
• Joystick calibration lookup checks the first available file in this order: /etc/trimui/joypad*.config, /userdata/system/joypad*.config (Batocera), then /mnt/UDISK/joypad*.config (stock BSP). The concrete filenames are joypad.config for the left stick and joypad_right.config for the right stick. Override the paths with TRIMUI_JOYPAD_CONFIG and TRIMUI_JOYPAD_RIGHT_CONFIG. Each file uses x_min, x_max, y_min, y_max, x_zero, y_zero, and a normalized deadzone (for example 0.10). Missing files retain the learned calibration fallback.
• Rumble uses GPIO 227 on the A133 backend and the PWM-vibrator backend on Smart Pro S.

Repo layout

• src/devices/: Device-specific logic (Smart Pro, Smart Pro S, Brick) and shared rumble core.
• src/drivers/: Low-level helpers (serial, GPIO, sunxi GPIO mmap, rumble drivers).
• src/gamepad/: uinput wrapper.
• src/calibration/: Upstream and learned stick calibration helpers.