Gareth Mcmullin
Senior Embedded Engineer at Basis
Auckland, Auckland, New Zealand
Summary
🤩
Rockstar🎓
Top SchoolGareth Mcmullin is a Senior Embedded Engineer based in Auckland with 15+ years of hands-on experience designing firmware and electronics for ARM Cortex-M systems. He combines deep low-level debugging and USB stack expertise—demonstrated by fixes and feature additions to prominent open-source projects like libopencm3 and Black Magic—with practical full‑stack tooling improvements such as remote debugging support in the Codelite IDE. Comfortable from bare-metal register hacking to higher-level build and debug workflows, he delivers reliable firmware and development ergonomics that accelerate teams. Gareth also holds an M.Ing and an MBA, a blend that equips him to balance technical decisions with product and business considerations. An interesting thread through his work is a focus on making tooling and examples truly usable—fixing examples and edge cases so others can reproduce and build on his fixes.
15 years of coding experience
Master of Business Administration - MBA, Master of Business Administration - MBA at University of OtagoUniversity of Johannesburg 
Github Skills (23)
debugging10
debug10
c-language10
cortex10
cortex-m10
usb10
cross-platform10
c-programming10
remote-debugging10
gdb10
driver10
sys10
arm10
embedded10
stm10
Programming languages (9)
Github contributions (5)
blackmagic-debug/blackmagic
Feb 2011 - Oct 2020
In application debugger for ARM Cortex microcontrollers.
Role in this project:
Embedded Systems Engineer
Embedded Systems EngineerContributions:3 releases, 600 commits, 230 PRs in 9 years 9 months
Contributions summary:Gareth added scripts and code for programming and debugging ARM Cortex microcontrollers. They focused on creating low-level GDB protocol implementations, including read/write memory, register access and handling of various target specific parameters. Contributions were also made to fix signal configurations and add USB UART interface.
cortexstlinkjtagflashdebugger
libopencm3/libopencm3
Nov 2010 - May 2013
Open source ARM Cortex-M microcontroller library
Role in this project:Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:62 commits, 1 PR, 1 comment in 2 years 6 months
Contributions summary:Gareth primarily focused on enhancing the USB device library for ARM Cortex-M microcontrollers. Their contributions included fixing handling of HALT conditions and data toggle within the USB code. They also improved the control mechanism dispatching and fixed several example projects (HID, DFU, CDC-ACM) to function correctly with the updated USB driver. In addition, they added support for the LuminaryMicro LM3S family and connectivity-line devices, as well as added definitions for new STM32 registers, including those for the DBGMCU, ITM, TPIU, and FPB.
cortexstm32msp432microcontrollerjlink
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