Weinigel Ingenjörsbyrå AB - Christer - CV

Weinigel Ingenjörsbyrå AB · Ringvägen 11A · 118 23 Stockholm

Curriculum Vitae, Christer Weinigel

Christer Weinigel
+46 706 681254

I am an experienced software engineer with a solid understanding of hardware. I was born in 1971 and have been interested in computers for as long as I can remember. I've done everything from J2EE services to boot loaders in assembly language, so I can work with just about anything, although the thing I'm really good at is software on embedded systems. I don't design hardware professionally, but I understand it well and often work closely with hardware engineers.

The kind of projects I like to work on are fairly short ones, some lasting just a few days, where I either act as a technical advisor or where the customer has a tricky hardware/software problem and need immediate help with troubleshooting; other projects lasting up to a few months, typically to bring up Linux on a new hardware platform, where I would work on the boot process and device support.


  • Fluent in Swedish and English, both spoken and written.
  • Experienced developer in C, C++, Java, various assembly languages and Python. Also knows basic Perl, lisp, Matlab, Verilog, VHDL, HTML and a lot of other languages, but the languages of choice are C and Python.
  • Experience with embedded and real time systems based on Linux, Android, various embedded RTOSes such as Nucleus, and also very small systems on micro-controllers such as the Microchip PIC processor and the Intel 8051.
  • Good networking skills with experience of TCP/IP, DECnet, IPX, AppleTalk, LonWorks and higher level networking services such as HTTP and SNMP
  • Experienced in security using PGP, OpenSSL, JSSE and BouncyCastle.
  • Expert in programming close to the hardware. Have a good understanding of hardware issues although I usually don't build hardware myself.
  • Experience of working in different countries and cultures. I have worked and lived for four months each in Singapore, UK and China, have commuted weekly to Norway for about two years, and have been on business trips for a few weeks each in the United States, Denmark and Taipei.
  • Much experience of working close with customers, often on site at the customer and in many countries.
  • Worked for a GPS company for five years, so know quite a lot about GPS, both applications related to GPS and the internals of a GPS receiver.
  • One of my biggest strengths is that I have the ability to look at new technology and learn it very quickly.

Some projects I've been involved with are:

Hobby projects
Too many to list all here, but I'm very interested in both software and hardware and spend much time on learning new things. Some of my hobby projects are a firmware for the EZ-USB and FX2 micro-controllers from Cypress, a 250MSample/s oscilloscope, and custom Linux firmwares for many different devices such as a PDA previously running Windows CE and a LG TV set. More documentation on some of my projects can be found at http://zoo.weinigel.se/trac/public.
2010-2011: SiRFStar IV
In 2009 CSR acquired the GPS company SiRF, so quite naturally I have worked with the SiRFStar IV products porting the SiRFStar IV host software to different platforms. Most of this work was done in China working on Chinese mobile phones with custom RTOSes.
2007-2011: CSR BC7830, a GPS capable Bluetooth chip
When CSR acquired Nordnav in 2007, they wanted to build a GPS capable Bluetooth chip which be called BC7830. I spent four months in Cambridge UK at the CSR headquarters working on the GPS parts of the chip firmware and on the chip-to-host interface making it possible to demo the BC7830 Software GPS at the Mobile World Congress in February of 2008. Since then I have worked on porting the GPS drivers and host software to many different platforms; most porting work has been on Linux and Android but I have also spent a few months in China working on Chinese mobile phones with custom RTOSes.
2005: A Linux port to the Acer N30 PDA
I went and bought myself an Acer N30 PDA. It took me about two weeks to get Linux booting on it, and about a month to really make it useful. A couple of months later during my Christmas vacation, I finally sat down and figured out how to do proper power savings, so by early 2006, I had a PDA which could do everything Windows CE could do on that device. Some people (LeTux) actually started selling Acer N30s with Linux preinstalled, and that effort was partially based on my work.
2002 - 2006: Solid AB (now known as ASSA ABLOY Shared Technologies)
The SOLICARD ARX project. ARX is an access control system using the internet for communications. I started working on the hardware support, boot loader (RedBoot/uCos and PPCBoot/U-Boot) and Linux port for the Axis ETRAX based board used in their local control units (LCU). After that I started working on the communications with the server designing and implementing a large part the PKI infrastructure (mostly using OpenSSL and JSSE) used in ARX. I got more and more involved with the server side of the system, working with the business logic written in C++ (Microsoft Visual Studio 6) and Java using a SQL database (SAP/DB) for storage. Since the system uses multiple implementation languages Corba and ONC RPC are used for inter-module communications. Later versions of the server software was implemented in Java, so I have also worked much with Java, Jetty, JSP. As the system has gotten closer to production I've also designed and built the hardware and software used for testing and programming of the LCU during manufacturing. I've also done a few debugging sessions finding and fixing a couple of really nasty problems in Solids proximity card readers, working with the Microchip PIC family of processors, both in PIC assembly language and in HiTech C.
2001 - 2002: The "Nano Computer"
Working on the design of an embedded computer based on the National Semiconductor Geode SC2200 processor. I've been responsible for most of the hardware specifications and have been working in close cooperation with the people designing the hardware, reviewing their design and making sure that it works well with Linux. They received the first prototype board in November 2001 and I got Linux running on it within a few days. After that I've been working on device driver development and CE certification for the board.
2000 - 2001: e2-Home
The e2-Home Smart Home project. My main responsibilities have been system design and device driver programming for the LonWorks home automation network, and the creation and maintenance of the CVS source code repository and automatic build systems. Additionally I have been doing coding and code review of the Java OSGi code and some network and NT service programming under Windows NT. Finally I have designed and built the hardware and software for two automatic test systems for the e2-Home IT box hardware.
1999 - 2000: Ericsson Cordless Screen Phone HS210
Did the port of Linux to the CeBit prototype for the Ericsson Cordless Screen Phone at Ericsson Cyberlab in Singapore and was also contracted for the product development of the real Cordless Screen Phone until I started working at Utilator. See http://www.ericsson.se/ and search for HS210.
1998 - 1999: Ericsson eBox
Doing almost all the initial Linux programming for the Ericsson eBox, doing a port of Linux to the new hardware, writing device drivers (for the LonWorks and ISDN), and as a technical adviser. See http://www.ericsson.se/ and search for ebox.
1998: FISH, a SSH client for OpenVMS
I did a port of TopGun SSH (a SSH client for the Palm Pilot) to OpenVMS. Richard Levitte quickly took over the development. See http://www.free.lp.se/fish/.
1996 - 1999: Mydata Automation AB
Moving all software on Mydata Automation's TP-machines, a surface mount assembly robot, to Linux, doing work at the hardware driver lever, system design level and applications programming. See http://www.mydata.se for more information.


2002 - Present: Weinigel Ingenjörsbyrå AB
Started a new company, Weinigel Ingenjörsbyrå AB, to work as a free-lance consultant. In 2006 I decided to become an employee again, at a previous customer, Nordnav. Weinigel AB still existed as a company but was in hibernation. In 2011 CSR decided to close the Stockholm office so Weinigel AB came out of hibernation again.
2006 - 2011: Employee at Nordnav Technologies AB, CSR (Cambridge Silicon Radio), and SiRF
Started working for Nordnav Technologies AB, which was then acquired by CSR at the beginning of 2007. I was hired to be an application engineer working with embedded systems at customers, but have so far spent most of my time working on the infrastructure around the software GPS receiver that Nordnav has created. From 2009 and onwards I have been working much more with customers, mostly in Asia. Most of the time I write C code, but a lot of tools and infrastructure around the receiver are written in Python, shell script and Makefile. CSR also acquired the GPS company SiRF in 2009, so I also spent quite some time working on the SiRF hardware GPS receivers.
2000 - 2001: Employed at Nano Systems AB
Working for Nano Systems AB. Mostly working in-house with the design of the Nano Computer, and as a consultant at Ericsson and e2-Home.
2000: Employed at Utilator AB
Started working for Utilator AB in May 2000 and worked mostly as a consultant at Ericsson until I decided to join a spin off company in November 2000.
1995 - 2000: Employed at Signum Support
Started work for Signum Support (now Cendio Systems), a company specializing in free software, mostly as a consultant specializing in Linux and embedded systems, but early on I did some Microsoft Windows programming in everything from Visual Basic and Microsoft Access to C++/MFC.
1993 - 1995: Studies at Linköping Institute of Technology
Studied Electrical Engineering at Linköping Institute of Technology and that's where I first encountered Linux in late 1993. I was also a member of an academic computer club named Ctrl-C, where I worked a lot with OpenVMS on VAXen. Besides that I also administered a Novell Netware network for a student computer hall.
1992 - 1993: Military Service
Did my military service as a radio service technician.
1992 - 1993: Windows programmer at Vattenfall AB
Worked part time as a Windows programmer for Vattenfall AB.
1991 - 1992: Part time work at Forsmark
Worked part time as a system administrator of a Norsk Data Nord 500 system and a Unix/SunOS system.
1990 - 1992: Studies at Formarks Skola
Studied Computer Science at a vocational college at the Forsmark Nuclear Power plant, resulting in an engineering degree (a Swedish gymnasieingenjör, teknisk 4-årig).
1989 - 1990: Exchange student in USA
Studied as an exchange student in Birmingham, Alabama, USA.
1971 - 1989: Early life in Stockholm
Born and raised in Stockholm where I also went to grade school and high school.