A JavaScript framework for Serial communication.

A little program to transfer Xbox 360 gamepad input data to virtual COM port for use by development board controlling a robot. It is designed to convert gamepad input into commands like setting motors' speed or toggling a certain servo. I am using xboxdrv userspace driver.

git clone https://github.com/foxpy/serialjs
cd serialjs
make release -j$(nproc)
sudo make install

serialjs [joystick [acm device]]

Usually your gamepad should be e. g. /dev/input/js0, but, actually, you are able to use any file. To record 100 gamepad input events and use them in tests:

JS_STRUCT_SIZE=8 # the size of js event struct, consult kernel documentation:
# /path/to/your/kernel//build/Documentation/input/joydev/joystick-api.html
packets=100
dd if=/dev/input/js0 of=samples/my_sample bs=$JS_STRUCT_SIZE count=$packets status=progress
serialjs samples/my_sample

ACM device is any USB virtual COM port device attached to your PC/SBC/etc. Usually, it is /dev/ttyACM0. You can use udev to run this program every time a particular device is attached.

/etc/udev/rules.d/99-serialjs.rules:

SUBSYSTEM=="tty", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="5740", RUN  = "/usr/bin/bash -c 'killall serialjs; systemd-run serialjs /dev/input/js0 /dev/ttyACM%n'"

For testing, you can specify arbitrary file as a second argument, the only requirement is to use debug binary. Release binary will refuse to write to a non-character file for safety reasons.