Greg Johnson Email & Phone Number

California, United States

-Developed embedded software for a clocking board on a portal linear accelerator system. The role of the board was to synchronize the firing of the linear accelerator with the triggering of the detectors for optimal x-ray image capture (C on FreeRTOS, MQTT).-Adapted a WinCE7 BSP to support an Intel Atom-based single-board computer. Included writing a watchdog driver, GPIO driver and configuring the OS.

San Diego, California, Us

Architected and implemented the middle layer software for a data collection project. Included writing several Linux device drivers (DMA, custom FPGA interface) and an API that the GUI layer can use to access the captured data (C++17 on Linux).

San Diego, California, Us

Architected and implemented most of the software for a headless Spectrum Analyzer device to meet our customer’s requirements (both functional and performance). Included writing several device drivers (DMA, custom FPGA interface). The application (C++17 on Linux) is a high throughput multi-threaded Linux application that sends the captured data over UDP or writes to disk.

Minneapolis, Mn, Us

Designed and developed code for new features for the PB980 ventilator. This included TCP communications between the ventilator and a PC to extract logs and send notifications. (embedded C++ on PowerPC processor and Windows PC)Added features to a UWP application that allows remote control of the ventilator, using TCP communications and a video capture device. (C#/UWP for Windows 10)

Vista, California, Us

Formerly Greenlee CommunicationsLead firmware engineer for the CableScout 90 product. Worked with a multi-disciplined team to develop this new TDR product, from an idea to a salable product (C++ on FreeRTOS).

Extended existing DataScout 10G Ethernet Test device to include C37.94 protocol testing capabilities. I was the software lead on a team of 3 and wrote firmware (C on uCOS embedded target) and an Android app (C# using Xamarin).Firmware engineer for a Xilinx/Microblaze 100G Ethernet test device research project. Included soft core bring up with uboot and Petalinux, designed and implemented a C++ linux application and wrote user space drivers for 100G Mac, i2c, mdio22/45, and custom FPGA modules.

Software architect and firmware developer for the AirScout Residential and Enterprise Product lines. AirScout is a WiFi test system that measures the environment and presents the user with expected performance. It consists of a number of battery operated devices. Provided input for requirements, developed communication interfaces and most of the firmware for initial release, managed internal and external developer resources. Linux application (C++ on embedded Linux) is a mutithreaded network sockets application. Made numerous changes to a Qualcomm-based wifi driver to extract necessary measurement data.Performed O/S bring up for an NXP-based microprocessor system using u-boot and Linux. Configured Yocto to build our custom Linux distribution. Added new features to SideKick+, a physical-layer copper tester (WinCE 6.0-based handheld device, C++ using MFC).

Reston, Va, Us

Designed, developed and tested signal acquisition software for next the generation RPM system. Application included hard real-time serial communication. C++ on WinCE 6.0. Serial, gpio, and watchdog device drivers for Windows CE6.0/7.0. C on MSP430 microcontroller. Application development. C++ on Windows XP/7Developed and tested an RPM calibration tool (C++, Borland for Windows). Designed, developed and tested an application to control a motor used in a device for testing RPM systems. (C# using Windows Presentation Framework (WPF)).Designed, developed and tested portions of the next generation steel radiation monitoring system (C# using WPF and MVVM pattern).

Vistsa, Ca, Us

Designed, developed, integrated and documented calibration systems for an electronic gyroscope and compass product (C++ in Windows using ATL).

Dublin, Oh, Us

Designed, developed and integrated a firmware updating platform for the PCU1.5 Medley® Infusion System (C++ in RTOS environment). This included high-level and detailed software design of components and interfaces. As a technical lead, led two embedded engineers and integrated with PC application engineers.Designed and developed the software to add barcode and RFID functionality to the Medley® Infusion System. This included system-level and component-level design using interface documents, UML state charts, class diagrams and flowcharts. Also included embedded programming (C-super loop) and multi-threaded programming (C++ in RTOS environment).Designed and developed software to manage an add-on 802.11b wireless network board for the Medley® Infusion System (C++ in RTOS environment).Implemented a prototype Smart-battery controller system using a TI MSP430 microcontroller with Quantum Framework state machine engine (C++).