curriculum vitae

basic information

name.......: Michał Łyszczek
address....: Wrocław, Poland
phone......: +48.727-564-419
email......: michal.lyszczek@bofc.pl
www........: https://en.bofc.pl

Quick Overview

Open Source (own projects)

List of open source projects I've made including key technologies. Links take you to project site with details and source code.

https://termsend.pl (bash, nginx, rc.d)
https://termsend.bofc.pl (c, pthread, socket, ssl)
https://embedlog.bofc.pl (c, embedded, pthread)
https://kursg.bofc.pl (bsh, markdown)
https://libfo.bofc.pl (c, bash, dlsym)
https://librb.bofc.pl (c, embedded, pthread)
https://mtest.bofc.pl (macro-c)
https://ntpd-setwait.bofc.pl (c, ntp, socket)
https://psmq.bofc.pl (c, embedded, mqueue, pubusb)

List of open source projects I contribute to:

https://nuttx.apache.org (c, rtos, drivers, chip bring up)
https://buildroot.org (c, integration, new board/app support)

Commercial

controller for solar panel microinverters (zephyr, c, stm32h7, plc, yitran)
stb integrator (yocto, bitbake, nagra, linux, security)
test board for dentist chair (linux, python, c, serial, gpio, i2c)
solar panels and inverter controller (c, zephyr, secureboot, cortex m)
smart shopping label (c, dual cpu cortex m0/m4, lora, spi, ipc)
solar panel controller (c, cortex a7, linux buildroot, mqtt, modbus-tcp)
engine controller (c, cortex m3, nuttx, can, adc, sd, flash)
beauty machine (c, cortex a7, linux, buildroot, uboot, mqtt, serial)
video mixer (c, altera socfpga, linux, buildroot, uboot)
LTE stack (c, lte l2)
posix kernel (c, stm32, pthread, socket, mutex, semaphore, time, stos ip)
ethernet intercom (c, stm32, ethernet)
diagnostic module (c, stm32, sd, adc)
LED cluster controller (c, stm32, httpd, mqtt, ftp, rtc)
passenger counting system (c++, linux, udp, mqtt)
driver sober monitor (c++, linux, serial, mqtt)
ticket validator driver (python, linux, serial, mqtt)
power monitor in tram (c, linux, mqtt, tcp)
network monitor (c, linux, raw socket, mqtt)
GUI for solar panel controller (c++, linux)
BTS technical reporting (c++)

skills

Very proficient

I am really good at this stuff, I can work independently and also help and teach others.

c, sh
[embedded] linux, nuttx
make, autotools, massif, valgrind, buildroot, gcc, git
tcp, udp, ip, unix domain socket, mqtt
spi, can, serial, gpio
pthreads, posix, jansson, mosquitto, c standard library

I'm good at

I've done some projects in these technologies, I can work independently without help.

<=c++11, python
bare metal, freertos, zephyr
yocto, buildbot, gtest, gmock, cmake, uboot
pxe, openvpn, iptables, dns, cow fs, routing rsyncd, dhcpd, namespaces, nginx, raid, nfs
i2c, adc
httpd, ftp
c++ stl

I know a little bit

I've dome some projects with it, but not long enough to consider myself good at it, I can perform simple tasks myself, but will need help and guidance with more difficult tasks.

aix, hpux, solaris, netbsd, openbsd, freebsd
assembler, >=c++14

Long Overview

Detailed list of projects with description and extended list of technologies.

Open Source (own projects)

ntpd-setwait

ntpd-setwait is very small program that ensures time is synchronized before ntpd daemon can be started.

Project site: https://ntpd-setwait.bofc.pl

libfo

Library which allows for very easy mocking of POSIX, libc and any other dynamically loaded functions. Library uses special handle RTLD_NEXT for dlsym().

Project site: https://libfo.bofc.pl

librb

Ring buffer implementation which is thread-safe and in the same time small and quick with very little memory footprint with posix-like interface known from read/send functions family. Library was created with embedded devices with limited resources in mind, but it can work with every operating system that implements c89 and pthread (optional dependency).

Project site: https://librb.bofc.pl

embedlog

Logger created with embedded devices with limited resources in mind, which will, of course, work with every operating system that implements c89. Implemented functions among others are, adding timestamps to messages (with different formats), place where log was printed from (file and line number), log level info, colors (depending on message level). Logger can also store logs to file with optional log rotatio - which can be customized for max file size and number of files before oldest logs shall be deleted. Almost all of these functions can be disabled in compile time to save precious memory.

Project site: https://embedlog.bofc.pl

psmq

Very portable and small packet which allows publish-subscribe communication implemented on top of POSIX mqueue. Packet consists of, server/broker which handles communication between clients, library for clients for easy implementation, publish commans which allows to publish messages directly from command line and program to listen and log to file communication on psmq bus.

Project site: httpss://psmq.bofc.pl

kursg

Simple static site generated from markdown and html files. Website is generated based on file structure and only one control file is needed to generate functionl webpage.

Project site: https://kursg.bofc.pl

termsend

Server to allow very easy file sharing without leaving our beloved terminal. To upload files only netcat is needed, and to retrieve files one can manage only with curl. Both binary and text files can be exchanged. It's something like no-paste but from terminal.

Project site: https://termsend.bofc.pl

mtest

Very easy and very simple but sufficient framework for testing in c/c++ or shell using TAP (test anything protocol).

Project site: https://mtest.bofc.pl

builder

Project based on buildroot that generates complete environment for testing c/c++ software on different architectures (arm, mips, x86), many C libraries (gnu, musl, uclibc) and many operating systems (linux, freebsd, netbsd, openbsd, solaris).

memperf

Benchmark for memory throughput.

nuttx (posix rtos)

port for stm32butterfly2 board, added support for: spi, rs232, ethernet, sd card, adc, console over uart, joystick, usb host

pqtt

mqtt client with posix-like api, for embedded devices (constrained devices)

Commercial

bofc.pl

maintanencing own server infrastructure
maintanencing servers for automatic tests (continous integration) for different architectures (armv5, armv6, armv7, armv8, mips, x86), different operating systems (linux, netbsd, openbsd, freebsd, solaris, aix, hp-ux) and different C libraries (gnulibc, musl, uclibc)
linux system administrator (backups, raid, vpn, git repos, monitoring (cron + scripts), nginx, network namespaces, router (internet sharing), rsyncd, dhcpd, filesharing samba+nfs, diskless pxe server, dns)
creating and maintaining company website
administration of Linux machines (servers and dev machines)

set-top boxes

software integration for set-top boxes (yocto linux)
software and kernel debugging
software test during integration
linux security review for nagra

solar panels and inverter controller

drivers and backbone framework based on freertos (project later moved to zephyr)
bringing up imxrt-1060 cpu in zephyr
implementing canfd support
implementing adc and voltage reading for the app
implementing secure boot with mcuboot and writing rescue loader
supporting team with linux and buildroot part of the project

smart shopping label

epaper based shopping label with updates over lorawan
based on nuttx rtos and stm32wl5
cpu bring up - since cpu was not yet supported in nuttx
ipc (inter processor communication) driver
secure boot with mcuboot

solar panel controller

Algorythm to charge batteries at daytime, and discharge at nighttime
software integration with buildroot and beaglebone black
diagnostics (logs on SD with time from RTC)
driving and monitoring modbus-tcp devices

engine power

driving chargers to charge batteries (CAN)
monitoring of battery state (ADC), relays and power supply
diagnostics (logs on SD with time from RTC)
CAN logger (logging all CAN frames onto SD card)
circuit protection from overcurrent (precharge logic)
storing critical errors on internal FLASH memory
diagnostic shell (with password protection) over UART

aestethic device

support for lemaker guitar and olimex a20 boards (arm linux)
linux building scripts (buildroot)
bootloader (uboot)
cloud communication (websocket)
device diagnostics with history and live view for cloud
graphical user interface (qt5, qml)
network manager
package server for updates
analyze of software performance
developer server administration (git, dns, jenkins, vpn)

video mixer

support for altera socfpga (arm linux)
investigation of fpga performance
linux building scripts (buildroot)
bootloader (uboot)
tcp and udp servers for communication with the device
managing onboard fpga

lte

developing l2 lte stack

embedded c software engineer [10.2015 - 06.2016]

Projects:

Realtime operating system with posix api, for 32-bit microcontrollers (stm32) with functions like: socket, semaphore, mutex, pthread, time, ring-buffer, fatfs, tcp/ip stack
intercom over ethrnet (stm32f1)
diagnostic module analyzing voltage and current on vehicle with options to store oscillograms int osd card in event of anomaly (voltage peak for example) (stm32f3)
led cluster controller over ethernet with mqtt (stm32f4)
application for previously written rtos like: http server, mqtt client, ftp client, rtc configurator
also I managed, git repository, gcc toolchain, cmake building system

embedded c/c++ software engineer [03.2014 - 10.2015] (full time)

Projects (working under Linux)

application counting passengers getting in and out of vehicle
application checking whether driver is sober - and blocking vehicle if not
ticket validator driver
application announcing current stop on demand from phone (bluetooth 4.0)
application monitoring power status in vehicle
monitor of transfer usage for different port-address-interface tuples
also I managed, git repository, gcc toolchain, cmake building system and jenkins

embedded c++ software engineer [10.2012 - 03.2014] (full time)

graphical user interface for solar panel cluster controller (group project)

junior C++ software engineer [09.2011 - 10.2012] (full time)

Maintanence and development of raporting module in BST (wcdma)

foreign languages

English - very good
Polish - mother tongue

hobby

guitar
piano
drums
composing music
computer games
hiking
physics (classical and quantum)

permission

I hereby give consent for my personal data included on this webpage to be processed for the purposes of the recruitment process under the Personal Data Protection Act as of 29 August 1997, consolidated text: Journal of Laws 2016, item 922 as amended.