Harry J. Email & Phone Number

As the Principal Developer at Practical Technology, I have spent most of my time working on a flexible, portable, "Project Starter Kit" ("PSK"), which is an operating framework that I can offer to my clients or to an employer.The PSK includes a general-purpose timer pool (with call-backs), a micro task scheduler, an RTOS "wrapper" (abstraction layer) file, an error logging module, an Embedded, C-only, Object-oriented API (“ECObject”) for constructing C++ style, class-based, device drivers, and additional supporting code modules.

St Petersburg, Florida, Us

I was hired to review the manufacturer’s documentation for a couple of new(er) STM & GigaDevice MCUs to ensure pin-to-pin compatibility with another MCU that was being phased out by the component manufacturer. I also setup a build environment for the work going forward and generated several short documents to aid the company in transitioning the existing firmware over to the new MCUs.

I was tasked with guiding the Founder/CEO in, and acting as a contributor for, the initial design & development of the operating firmware for a wearable medical device (based on a Nordic Micro nRF58210 MCU/BLE IC).

Raleigh, Nc, Us

I was responsible for writing, enhancing, and maintaining the monitoring and control firmware for both reference designs and customer platforms based on Valencell's "PerformTek (tm)"​ wearable (earbud, armband, & wristband) biometric sensor technology.Languages utilized included C and assembly. My everyday tool set consisted of a Windows cross-development platform, several IDEs, a number of target-specific compiler/assembler/linker tool chains & JTAG debuggers/program loaders, specialized communications monitoring tools (PuTTY, Serial Monitor), several "diff"​ tools, Tortoise SVN (a Subversion client), a number of specialized in-house target boards with breakout headers and test points for verifying and debugging code, a digital oscilloscope, a bench-top power supply, and a DMM.I worked on a number of low-level device drivers built in compliance with a new standardized, object-oriented, I/O Module API "class"​ structure that I designed to bring C++ like features into a C-only environment. I completed device drivers for multiple specialized light emitter/detector ICs, 4 or more accelerometer/gyro ICs, I2C bus controllers (master & slave), serial UART interfaces, a Real-Time Clock-Calendar (RTCC), and an LED controller/driver component.In addition, I was responsible for porting our code to multiple micro-controller platforms, and I added a small OS micro-kernel that I implemented to schedule tasks and supply general-purpose timers from a pool.Finally, I was responsible for determining most aspects of both the general and specific direction of the company's firmware efforts going forward. It was my job to specify and/or authorize things such as the firmware architecture & design standards, coding guidelines, and MCU (Micro-Controller Unit) selection and qualification, and to guide the other team members as well.I truly enjoyed my time spent at Valencell and all of the challenges and learning opportunities that were presented to me.

Was responsible for various portions of the bring-up, initial subsystem testing, and device driver development for the latest multi-core System-On-Chip (SoC) baseband processors (TI-OMAP), audio/modem subsystems, and reference platforms for newer generations of the BlackBerry smart phones and hand-held computing/communications devices.Work was performed using a combination of C and C++, the Eclipse IDE, and the Beyond Compare "diff" tool.

Design and development of firmware (in C, for an 8051) to support new features and enhancements for the REX line of electricity meters. For example, I was responsible for the over-the-air (OTA) firmware update functionality for the REX2 meter. This feature allows meters (and other associated devices) to be upgraded remotely via the wireless network.I was also heavily involved in defect determination & resolution and the implementation of additional functional elements and features such as event logs, relay control, etc.I made additional contributions in the form of writing/updating associated requirements documentation, as well as performing general device and system-level testing of features and developing various scripts in Python to support this effort.While at Elster I was the co-Inventor for a patent related to remote relay control policies (US 8,212,432 B2 "Safety Interlocks For Electricity Meter Control Relays").

Developed firmware (in C, for a TI 5502 DSP) for an advanced technology Multi-Modal Spectrometer. Implemented a complete USB command handler that allowed the device to be controlled by an attached Windows PC. Also developed remote controlled, in situ firmware update capability for both the DSP and an onboard FPGA.

San Jose, Ca, Us

Design/development of firmware (in C and assembly) for an ARM7TDMI-based digital camera System-On-Chip product line.Implemented a complete set of drivers for USB Mass Storage Class, Still Image Class, Picture Transport Protocol, Direct Print System, etc.

Bachelor Of Applied Science, Digital Electronics

Series Of Specializations In Math/Statistics For Computational & Data Science

Diploma, Electronics