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pavel-kirienko / setup_slcan
Last active March 22, 2024 07:36
setup_slcan -- a simple script for managing SocketCAN SLCAN interfaces on GNU/Linux
# Pavel Kirienko <>
HELP="Register slcan-enabled serial-to-CAN adapters as network interfaces.
`basename $0` [options] <tty0> [[options] <tty1> ...]
Interface indexes will be assigned automatically in ascending order, i.e., the
first device will be mapped to slcan0, second to slcan1, and so on.
pavel-kirienko /
Created June 29, 2021 10:14
Transform C-style comments into C++-style comments preserving Doxygen notation
#!/usr/bin/env python
# Bulk usage:
# find . -name '*.[ch]pp' -exec bash -c ' < "{}" > "{}.out" ; mv "{}.out" "{}"' \;
import sys, re
RE_REPLACE = re.compile(r"(?m)^(\s*?) ?\*(.*)")
def replace_one(match) -> str:
use_doc = bool(match[1])
pavel-kirienko /
Created April 16, 2021 14:54
Capture high-frame-rate, high-resolution video of the desktop using ffmpeg
# Capture high-frame-rate, high-resolution video of the desktop using ffmpeg.
# The key options are: -c:v libx264 -f flv -vb 1000M -deadline realtime -cpu-used 12
# Without these, the output video peaks at ~5 fps or so.
ffmpeg -video_size 3840x2080 -f x11grab -i :0.0+3840,0 -c:v libx264 -f flv -vb 1000M -deadline realtime -cpu-used 12 output.mp4 -y
pavel-kirienko / 51-xbox-gamepad.rules
Last active May 14, 2024 09:15 — forked from dnmodder/
Use Microsoft X-Box 360 Gamepad with GNU/Linux
# By default, X-Box 360-compatible controllers are detectable but dysfunctional because they expect the host
# to send a particular USB control transfer with some sort of initialization command.
# This udev rule will invoke a trivial Python script automatically when the gamepad is connected that emits
# the required initialization command.
# Integration:
# 1. Put this rule into /etc/udev/rules.d/51-xbox-gamepad.rules
# 2. Install pyusb for the root's Python: sudo pip install pyusb
# 3. Reload udev rules as root: udevadm control --reload-rules && udevadm trigger
pavel-kirienko /
Created June 9, 2020 15:42
Convert video to gif
# Convert all video files in the current directory into gifs.
# Silently overwrite existing files.
# This is useful for working with matplotlib animations.
for src in *.mp4
echo "$src $bn"
ffmpeg -y -i "$src" "${bn}.gif" || exit 1
pavel-kirienko /
Last active January 24, 2024 19:19
Converting flat binary into ARM ELF format, useful for firmware uploading via GDB
# The part .data=0x08000000 should be replaced with the correct base offset of the ROM.
# The value 0x08000000 is valid for STM32.
arm-none-eabi-objcopy -I binary -O elf32-little --change-section-address .data=0x08000000 input.bin output.elf
pavel-kirienko /
Created November 6, 2017 20:53
A simple snippet for the UAVCAN GUI Tool (v0.9) that sweeps an ESC RPM setpoint from zero to maximum and then back
def run():
rpm_setpoint = 0
going_down = False
step = 2
def update():
nonlocal rpm_setpoint
nonlocal going_down
rpm_setpoint += (-step if going_down else step)
if going_down:
pavel-kirienko /
Last active April 6, 2021 02:32
Web interface for a backup storage server (CGI bash script, usable with any web server that supports CGI)
# Backup server web interface (CGI script).
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions: