Chris and Elecia discuss her origami art show, ponder PRs for solo developers, attempt to explain GDB debugging, and make a to-do list for getting rid of Kanga. Elecia is having an Origami Octopus Garden art show at the Aptos Public Library for the month of November, 2024. The postcard advertisement is below. There are more pictures on her Instagram (@elecia_white). The python tessellation generator is here. Memfault’s Interrupt Debugging Firmware with GDB post is a much more considered...

Adrienne Braganza Tacke spoke with us about her book Looks Good To Me: Constructive Code Reviews. It is about how to make code reviews more useful, effective, and congenial.  Adrienne’s book is available now as an ebook at manning.com or a paper copy later in the year (Amazon link). Check out the example Team Working Agreement from Appendix A. Adrienne’s personal website is adrienne.io. Transcript

Chris and Elecia chat about simulated robots, portents in the sky, the futility of making plans, and grad school.  A problem with mics led us to delay the show with Shimon Schoken from Nand2Tetris (co-author of Elements of The Elements of Computing Systems: Building a Modern Computer from First Principles). Look for that later in the year. Elecia is playing with Webots, a robotics physics simulator. Simpler than ROS’s Gazebo, it also can run in an online mode where you can run it on a...

Antoine van Gelder spoke to us about making digital musical instruments, USB, and FPGAs.  Antoine works for Great Scott Gadgets, specifically on the Cynthion USB protocol analysis tool that can be used in conjunction with Python and GSG’s FaceDancer to act as a new USB device.  While bonding over MurderBot Diaries was a given, Antoine also mentioned NAND2Tetris which Elecia countered with The Elements of Computing Systems: Building a Modern Computer from First Principles, the book that...

Alan Blackwell spoke with us about the lurking dangers of large language models, the magical nature of artificial intelligence, and the future of interacting with computers.  Alan is the author of Moral Codes: Designing Alternatives to AI  which you can read in its pre-book form here: https://moralcodes.pubpub.org/ Alan’s day job is as a Professor of Interdisciplinary Design in the Cambridge University department of Computer Science and Technology. See his research interests on his...

Chris and Elecia talk to each other about setting aside memory in a linker file, printing using your debugger, looking around a new code base, pointers as optimization, choosing processors, skill trees and merit badges. Elecia’s Creating Chaos and Hard Faults talk and slides. STM32 Application Note AN4989 microcontroller debug toolbox includes semihosting. Memfault’s Interrupt blog has a good Semihosting post. Elecia and Steph’s Embedded Skills Tree. A far more detailed one pointed out by...

Rick Altherr spoke with us about high-speed control, complicated systems, and making quantum computers. If you want to know more about building quantum computers, take a listen to Rick’s MacroFab episode: The Nuts and Bolts of Quantum Computing. If you want to make your own quantum circuit simulator, it only takes 27 lines of Python: A Quantum Circuit Simulator in 27 Lines of Python. What about if you actually want to know about quantum computing? Rick suggests Quantum computing for the...

Professor Colleen Lewis joined us to talk teaching pointers with stuffies, explaining inheritance through tigers, and computer science pedagogy. Check out her YouTube channel to view her videos explaining CS concepts with physical models. These are also collected on her website: Physical Models of Java. If you are an instructor (or thinking about teaching CS), check out Colleen’s CS Teaching Tips. You may also be interested in some other research: John Edwards Study on Syntax exercises...

Chris and Elecia talk about their current adventures in conference talks, play dates, and skunks.  Elecia’s talks are available on YouTube: Creating Chaos and Hard Faults: An introduction to hard fault handlings, stack overflows, and debugging hard bugs Introduction to Embedded Systems (O'Reilly Expert Webinar): An introductions to… well, embedded systems These are both advertising for the 2nd edition of Elecia’s book, Making Embedded Systems: Design Patterns for Great Software. You...

Jerry Twomey spoke with us about his new O’Reilly book Applied Embedded Electronics which covers embedded topics such as EMI, signal processing, control systems and non-ideal components. Jerry is also the principal engineer at Effective Electrons. His articles are linked from there and you can contact him via the site. Here is a 30-day trial for the O’Reilly Learning System. You can take a look at Jerry’s Applied Embedded Electronics and Elecia’s Making Embedded Systems as well as hundreds...

Carles Cufí spoke with us about Zephyr, Nordic, learning, open source development, and corporate goals.  Carles had some great suggestions for learning Zephyr: Memfault Interrupt Practical Zephyr blog series Nordic’s Developer Academy  Zephyr’s Discord server Zephyr’s YouTube channel (@ZephyrProject), sorted by views  Macrobatics term is from Zephyr Devicetree Mysteries, Solved - Marti Bolivar, Nordic Semiconductor  There is also the Zephyr website for a full picture. And...

Jan Rychter joined us to talk about building a company, electronic components, and software design. Jan is the founder and engineer at PartsBox.com. If you are interested in the meta-analysis of the data, check out his article on the Top Ten Hobby Parts and the Electronic Component Database,  You can find out more about Jan through his website (jan.rychter.com), LinkedIn, or Mastodon. Transcript

Kwabena Agyeman joined Chris and Elecia to talk about optimization, cameras, machine learning, and vision systems.  Kwabena is the head of OpenMV (openmv.io), an open source and open hardware system that runs machine learning algorithms on vision data. It uses MicroPython as a development environment so getting started is easy.  Their github repositories are under github.com/openmv. You can find some of the SIMD details we talked about on the show: 150% faster: ...

Lee Wilkins joined Chris and Elecia to talk about The Open Source Hardware Association, the Open Hardware Summit, and zine culture. The Open Source Hardware Association (OSHWA) provides certification and support for creating open source hardware. The Open Hardware Summit is happening May 3-4, 2024. It is in Montreal, Canada. It also has many online components including a Discord and online Unconferece. All videos are available for later watching on YouTube.  Lee’s personal page is...

Chris and Elecia talk about the Embedded Online Conference, their experience learning Zephyr, and some listener questions. Elecia will be presenting on Creating Chaos and Hard Faults at the Embedded Online Conference, Apr 29 - May 3, 2024. Some other talks that look interesting: The Power of a Look-up Table by Nathan Jones Zephyr Tools To Debug Hardware by Chris Gammell Breaking Good: Why Virtual Hardware Prefers Rough Handling by Uri Shaked Beyond Coding: Toward Software...

Logic gates and origami? Professor Inna Zakharevich joined us to talk about Turing complete origami crease patterns.  We started talking about Turing completeness which led to a Conway’s Game of Life-like 2D cellular automaton called Rule 110 (Wikipedia) which can be implemented with logic gates (AND, OR, NOT). These logic gates can be implemented as creases in paper (with the direction of the crease indicating 0 or 1).  The paper describing the proof is called Flat Origami is Turing...

Philip Koopman joined us to talk about how modulo 255 vs 256 makes a huge difference in checksum error detection, how to get the most out of your checksum or CRC, and why understanding how they work is worth the effort. Philip has recently published Understanding Checksums and Cyclic Redundancy Checks. He’s better known for Better Embedded System Software as well as his two books about safety and autonomous vehicles: The UL 4600 Guidebook: What to Include in an Autonomous Vehicle...

Making Embedded Systems, 2nd Edition came out today! Chris and Elecia talk about the changes, the writing, but not the eldritch horror. Then we talk about pianos and origami.  The electronic version is available now on Amazon, ebooks.com, Google Play and where you get your ebooks. The paper copy will be out in about two weeks, you can preorder now. It is also available on the O’Reilly Learning System, here is a  30-day Trial. See the Embedded.fm Origami and Flex PCBs newsletter, sign up...

Where electronics meets music, there is a board called Daisy. Created by ElectroSmith, Andrew Ikenberry, the goal of the board is to teach computers to sing. Andrew joined us to talk about music, audio processing, instruments, product design, and electronic manufacturing.  See the Electrosmith website, specifically the Daisy Seed. The electro-smith github repository is extensive (with many Daisy Examples). Also see their YouTube channel. Electrosmith is offering 5% off until mid-March for...

Helen Leigh joined us to talk about putting together conferences (including Teardown 2024), indie hardware producers (including via Crowd Supply), and building communities. Teardown will be June 21-23 in Portland, OR, USA. More information about attending or presenting. Early bird tickets are available for a limited time! Teardown is put on by Crowd Supply, a company that helps hardware companies launch products. Hardware Happy Hour Portland is a regular meetup that Helen organizes. Helen...

Chris and Elecia chat with each other about motor encoder reading methods, conferences coming up, soldering irons, schematic reviews, looking for a new job, and general life.  Some conferences coming up in the embedded space: Embedded Online, April 29-May 4, virtual (Elecia will be speaking) Open Hardware Summit in May 3-4, Montreal, Canada Embedded World in April 9-11 in Nuremburg, Germany Evil Mad Scientist Laboratories was purchased by Bantam Tools! Starter soldering irons?...

Anders Nielsen joined us to talk about why the 6502 is the best processor.  Anders also sells 65uino kits on his store: imania.dk. For more explanation of what they are, how they work, attaching peripherals, and programming in assembly, look at Anders’ YouTube channel @AndersNielsenAA, read his blog on abnielsen.com, or read about it on its Hackaday.io project page.** We also mentioned Ben Eater’s 6502 Kit, Adrian's Digital Basement - YouTube, and Rodnay Zaks’ Programming the 6502. **...

Chris and Elecia talk about cars, fleeting moments of fame, their year, and the sorry state of tools in the embedded space. Chris became internet famous for asking a car dealership’s chatbot (powered by ChatGPT) to generate Python code for fluid dynamics problems. After this, someone else asked the chatbot to sell a car for $1.  Pass the Bricks is an organization that takes Lego bricks and turns them into sets for kids who don’t have any. Speaking of re-use, contact the show if you’d like...

Ralph Hempel spoke with us about the development of Lego Mindstorms from hacking the initial interface to running Debian Linux as well as programming Mindstorms in Python. Happy 25th birthday to Lego Mindstorms! Pybricks is a MicroPython based coding environment that works across all Lego PoweredUp hubs and on the latest Mindstorms elements. The creators are David Lechner and Laurens Valk. Ralph was the first person to boot a full Debian Linux distro on the brick, see EV3Dev, a Debian Linux...