2025-12-30 15:41:34
Minutes before a recent video call where I was slated to give a demo, I initiated a reboot on my System76 Oryx Pro laptop, but it did not come back up after seemingly powering off. I attempted to manually power on and found it unresponsive. The machine was connected to power, so I saw the familiar power and battery LEDs illuminated on the front of the machine. Given that the machine appeared to not even be attempting to boot, I suspected that the issue was likely related to power or the battery.
2025-12-24 15:41:34
In my day job and free time I frequently find myself debugging Arm Cortex-M microcontrollers (MCUs). In recent years, it has become more and more common for the cores in these MCUs to implement Armv8-M, with the Arm Cortex-M33 being a very popular variant. Armv8-M includes an optional security extension (Cortex-M Security Extension or “CMSE”), which is more commonly known by its marketing name, TrustZone. The security extension allows for a core, or a Processing Element (PE) if using the official terminology in Arm reference manuals, to divide memory into Secure and Non-Secure regions.
2025-11-09 15:41:34
This past Saturday I went out for a 12 mile run with a few friends. Absent the beautiful fall colors on display this time of year in North Carolina, there was nothing especially notable about this particular run. However, the fact that it was not notable is notable itself. Two years ago I set a goal to run 2,023 miles in 2023. After reaching that goal with time to spare, I revised the goal to 3,000 miles, and just barely reached it.
2025-11-07 15:41:34
A few weeks ago I posted about how much fun I was having with the Fomu FPGA development board while travelling. This project from Tim ‘mithro’ Ansell and Sean ‘xobs’ Cross is not new, but remains a favorite of mine because of how portable it is — the entire board can fit in your USB port! The Fomu includes a Lattice Semiconductor iCE40 UltraPlus 5K, which has been a popular FPGA option over the past few years due to the reverse engineered bitstream format and ability to program it with a fully open source toolchain (see updated repository here).
2025-10-09 15:41:34
Though I spend the majority of my time working with microcontroller class devices, I also have an embarassingly robust collection of single board computers (SBC), including a few different Raspberry Pi models, the BeagleV Starlight Beta (RIP), and more. Typically when setting up these devices for whatever automation task I have planned for them, I’ll use “headless mode” and configure initial user and network credentials when writing the operating system to the storage device using a tool like Raspberry Pi’s Imager.
2025-07-14 15:41:34
We started this series with a look at operators and kernels, the “instructions” used by models and the implementation of those instructions on the available hardware. We then explored the computation graph, which defines the sequence of operators for a given model, and explored how different model formats opt to include the explicit computation graph in the distributed file, or defer it to the inference application. With tflite-micro and the .
