Embedded engineer

1/2020 – 6/2020

• Worked on Teledyne’s “GroundLink Evolution” aircraft to ground data link. Developing Linux user-space C++ code running on an NXP LS1046A SoC (quad ARM Cortex-A72).
• Used Yocto, embedded Linux, gcc, Eclipse, VirtualBox, Kafka, ZeroMQ, REST API, GPIO, I2C, PMBus, JSON, XML, Python, udev, multiprocessing, multithreading, Git, schematics.

Embedded Entwicklung / hardwarenahe Entwicklung, Embedded Linux, C++

2/2019 – 12/2019

• Developed bare-metal embedded C and assembly language for a prototype drone geo-fencing/caging system based on the NXP MPC5604E SoC. Converted the prototype into a DO-178B DAL-B product based on the NXP MPC5674F SoC.
• Wrote board bring up code and drivers for UART, SPI, SoC flash, Cypress FL-L NOR flash, CRC engine, DMA, MMU, interrupt controller, GPIO, Holt HI-3593 ARINC 429 interface, Broadcom HCMS-2903 dot matrix LED display, and TI TLV2553 ADC, GPS receivers. Also developed code for an NMEA-183 message parser, various state machines, scheduler, serial communications protocol, memory scrub, memory test, BIT, and a basic flash translation layer.
• Created the navigation algorithms, wrote Python code to simulate them and then implemented them on target using fixed point arithmetic. Also wrote Python code to parse Openair formatted data files to create binary blobs that could be loaded onto the target, as well for post processing of ELF files to add meta-data such as a CRC.
• Worked on a DDR2 memory controller configuration for an NXP MPC8569E SoC.
• Used NXP Design Studio (Eclipse), P&E Micro and Lauterbach JTAG debuggers, TRACE32, AIM USB-to-ARINC429 modules, gcc extended-asm, Wind River Diab compiler, PyCharm, Qt, ctypes, JSON, makefiles, bash, linker command files, Subversion, WGS84, schematics, oscilloscopes.

Embedded Software

4/2018 – 10/2018

• Developing C for an IoT device based on an NXP i.MX6ULL SoC with ARM Cortex-A7 core. Software is used to control electroluminescent wire lighting and strings of LEDs controlled by the WS2801 SPI LED controller. Lights are attached to dancer uniforms and controlled via WIFI.
• Ported pre-existing bare-metal C and assembly code from an 8-bit architecture to a ARM based platform.
• Using Gentoo crossdev and Portage to create embedded Linux root file system. Initial development done on Beaglebone Black Wireless boards and later on the Toradex Colibri Evalboard with i.MX6ULL compute module before porting to custom board.
• Using Github, Eclipse, U-Boot, GPIO, I2C, SPI, PWM, gcc, makefiles, Python, libev for event handling, multi-processing and multi-threading, sockets, Linux device trees, Gentoo Linux, runit init system, oscilloscopes, schematics.

Embedded Entwicklung / hardwarenahe Entwicklung

2/2017 – 4/2018

• Developed software for the Airbus A330-700L Beluga XL main deck cargo loading system. Wrote low level device driver and control C code. Code runs on an NXP MPC5606B automotive SoC (e200z0h core).
• Wrote device driver code to control HI-3585 ARINC 429 serial devices via the SPI. Implemented the ARINC 429 serial bit oriented (Williamsburg) layer-2 protocol version 1 used to transmit BITE data via an Air Traffic Services Unit (ATSU) to the Aircraft Maintenance Analysis (AIRMAN) ground based server. Wrote LabVIEW “code” to exercise the ARINC 429 drivers and state machines. Developed device driver code to create and parse CAN bus messages. Invented an algorithm to sequence cargo motors. Provided requirements feedback to systems engineers while developing code.
• Worked with the hardware engineers to help bring up and debug new PCB’s.
• Created a Windows 10 based application using Python, PyQt5, ctypes, and pyinstaller to simulate the aircraft side of the ARINC 429 serial communications via AIM ASC429 USB-to-ARINC429 devices.
• Developed driver code to communicate with a vacuum flourescent display via a UART, LED controllers and temperature sensors via I2C connections, FRAM NVM via an SPI connection.
• Used CAN Bus, I2C, SPI, UART, PWM motor control, NXP CodeWarrior (Eclipse), MS Visual Studio, LabVIEW, CVS, PEmicro JTAG debuggers, oscilloscopes, schematics, lab environment, DOORS, DO-178C.

Embedded Entwicklung / hardwarenahe Entwicklung

2/2015 – 10/2016

Worked on the flight deck display system of the Boeing 737MAX airplane. Wrote C and assembly for the VxWorks 653 board support package running on a quad core (e500mc) Freescale P3041 PowerPC.
Implemented the driver code for the I/O-MMU (the PAMU) to control access to system memory via the PCIe, DMA, and network interfaces.
Wrote low level code for the MPIC interrupt controller, the DMA device driver and various other IOCTL's. Wrote interrupt service routines. Wrote hardware health monitoring code for the startup and continuous BITE. Wrote code to configure core MMU TLB's, the DDR memory controller and perform memory scrub. Cleaned up low level network driver code. Cleaned up flash file system code (YAFFS).
Performed code and requirements reviews. Assisted V&V team.
Ported Verocel ARINC-653 certification package to target.
Performed timing analysis of VxWorks kernel scheduler.
Used DOORS, Wind River Workbench/Eclipse, JTAG debuggers, WireShark, Polyspace, PREP, Subversion, lab environment, JIRA, Agile/scrum.

Vxworks, Scrum, Software engineering / -technik, Subversion, Assemblersprache, C, Eclipse, Telekommunikation / Netzwerke (allg.)

7/2014 – 10/2014

Wrote C code to DO-178B level-B for a Kinetis K10 microcontroller with an ARM7 core that is part of the refueling control system on the Boeing KC-46 air tanker. Implemented the BITE code. In particular worked on the interactive and background BITE state machines, wrote functions to collect voltage and current samples from various on-chip and external A/D converters via DMA and I2C, range check the values and send result messages via the CAN bus. Used Freescale CodeWarrior/Eclipse, ARINC 825 (CAN bus with extended addressing), JTAG debuggers, I2C bus, Rational Rhapsody, lab environment. Performed code reviews.

Software engineering / -technik, C, Eclipse, Picmicro, ARINC 825, CAN-Bus (controller area network), Embedded Software

9/2012 – 4/2014

Wrote DAL-A C code running on a PowerPC (MPC8349) for the Remote Data Concentrator project for the Airbus A350XWB. In particular, worked on the built in testing and fault handling code (BITE), storage of fault data in non volatile memory and transmission of data on the AFDX/ARINC-664 network. Bare metal scheduler. Used DOORS, ClearCase, ClearQuest, Rational Rhapsody, Wind River Workbench, Lauterbach JTAG debuggers, Wireshark, DO-178B.
Worked on the Slat and Flap Control Computer (SFCC) for the Airbus A350XWB project. Performed validation and verification of requirements. Wrote C and Python code. Used DOORS, ClearCase, Eclipse, Green Hills Multi, DO-178B, C and Python.

C, Eclipse, Embedded Software, Python, Software engineering / -technik, Technisches Testing, Testen

2/2012 – 9/2012

Worked on GE's Incremental Train Control System (ITCS). Wrote safety critical embedded C running on Motorola ColdFire MCF5235 processors. Created change requests, implemented them and participated in code reviews. Used Green Hills Multi Integrated Development Environment, PC-Lint and Understand For C source code analyzers, MISRA C/C++ coding standards, and StarTeam version control/change tracking tool.

Software engineering / -technik, C, Schulung / Training (IT), Embedded Software

5/2011 – 1/2012

Wrote object oriented Python code and some Cython and C to implement MS Windows based applications. Used unittest, virtualenv, nose, simplejson, Django and ctypes extensions. Development work done on Ubuntu Linux machines. Used Mercurial, PyCharm, Subversion, Hudson/Jenkins, Agile/Scrum.

Ubuntu, Microsoft Windows (allg.), Scrum, Agile Methodologie, Python, Software engineering / -technik, C, Subversion, Django

4/2010 – 4/2011

Wrote embedded C code for the Rockwell Engine Instrumentation and Crew Alert System (EICAS) for the Gulfstream G250 and Bombardier aircraft. Wrote Python test scripts and implemented top level test environment. Performed C and Python code reviews using Rockwell's peer review Eclipse plugin. Wrote and reviewed requirement documents and determined if C/Python code met requirements. Worked on DO-178B level A and B software.
Used gdb, Visual Studio, DOORS, UltraEdit, Clearcase, Subversion, DO-178B, ARINC 429.

Python, Microsoft Visual Studio, Software engineering / -technik, C, Subversion, Eclipse, Embedded Software

10/2000 – 2/2002

Responsible for developing C-code for a high speed CDMA modem based on the C5410 and C5416 DSP's.
Worked on implementing in the C language the searcher, rake finger assignment, pilot tracking loop and antenna steering routines as well as general code clean up.
Also responsible for implementing the antenna diversity feature on the base station.
Used Texas Instruments Code Composer, ClearCase and LabVIEW.
Worked in a lab environment, using logic analyzers and scopes for debugging.
Wrote test code to help the hardware engineers debug their VHDL software.

Software engineering / -technik, C, Labview, Embedded Software

10/1990 – 11/1992

Simulated in C and then developed, in assembly language, code to implement a 16 KBPS LD-CELP (G.728) real time speech compression algorithm using a TMS320C30 signal processor. Also implemented in assembly language a wide-band ADPCM speech coder based on the G.722 algorithm.
Involved in the development of a multi-media document information system using Sun-SPARC stations as platforms. Developed codes for various GUI's for the package and gained experience in programming with X-windows.

Embedded Entwicklung / hardwarenahe Entwicklung