Deep Dive w/Scott: Zephyr Bootloader

Deep Dive w/Scott: Zephyr Bootloader

Author: Adafruit Industries August 28, 2026 Duration: 1:02:49
Join Scott as he works to polish the MCUboot bootloader for use with Zephyr based firmwares like CircuitPython. He'll answer any questions folks have too. Visit the Adafruit shop online - http://www.adafruit.com Thanks to dcd for timecodes: 0:00 Getting started 0:57 Hello everyone - circuit python (CP) on microprocessor example NRF64LM20 3:25 Join discord for chat (online and during the week) 4:12 Detour into bootloader - 8:00 Seattle happy hardware hour - first Thursday of every month 12:19 github adafruit/adabute 13:22 uf2 bootloaders - then green lake 14:32 oldinsurancemaps.net rabbit trail 15:34 uf2 created to drag/drop boot loaders 17:42 need to preserve the flash segments 19:39 original adafruit UF2 boot loader 20:12 tinyuf2 ( built on tinyusb ) support espressif 20:52 nRF52 bootloader 21:30 adding a fourth boot loader based on zephyr 22:23 LLM coding 23:32 safe mode support added "saved word" ( including unit test ) 25:45 swapping regions for software update over the air (OTA) 29:08 UF2 application that can update itself 29:50 OTA_0 and OTA_1 discussion 32:18 boot loader status indicators, and double tap 33:13 partition table example nrf54lm20dk.dtsi 39:54 ROM bootloaders 43:33 enter boot loader via double reset 45:39 boot/zephyr/main.c and CONFIG_BOOT_SERIAL_DOUBLE_TAP (double tapping reset) 47:35 related to CP reset and boot button 51:10 consider firmware for coprocessors also 52:30 thinking about pin muxing in parallel 54:00 build and reflash the bootloader 55:00 CURRENT.UF2 support for dragging off the non volatile memory, and INFO_UF2.TXT 56:40 copy the updater to the UF2 drive 52:23 next week in new office! 1:00:44 display support ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/ -----------------------------------------

Tune into Adafruit Industries for a direct line to the workbench. This isn't a polished lecture series; it's the sound of making things happen, coming straight from the company's factory floor in New York City. You'll hear the real-world process of bringing do-it-yourself electronics to life, with all its experimentation and discovery. Each episode is a deep dive into practical, open-source projects that demystify technology and empower you to build your own. The conversations and demonstrations focus on turning concepts into tangible creations you can actually make at home, stripping away the intimidation factor of hardware and coding. Hosted by the team at Adafruit Industries, this educational podcast serves as an audio companion to their extensive video library, offering context, stories, and insights behind the builds. It's for anyone with a curiosity about how their gadgets work and a desire to roll up their sleeves and learn by doing. Expect a friendly, inclusive, and hands-on approach to electronics education that feels more like a collaborative workshop than a formal class.
Author: Language: English Episodes: 50

Adafruit Industries
Podcast Episodes
CircuitPython Weekly Meeting for September 14, 2026 [not-audio_url] [/not-audio_url]

Duration: 37:28
Notes document is available here, with timecodes: https://github.com/adafruit/adafruit-circuitpython-weekly-meeting/blob/main/2026/2026-09-14.md Join here for the chat all week: http://adafru.it/discord The CircuitPython…
Deep Dive w/Scott: Pin Muxing [not-audio_url] [/not-audio_url]

Duration: 1:05:36
Join Scott as he discusses dynamic pin muxing in the Zephyr port. For example, pin muxing allows user code to use any I2C on any capable pins. He'll also answer any questions folks have. Visit the Adafruit shop online -…
CircuitPython Turbo: Faster Code, Same Friendly Python [not-audio_url] [/not-audio_url]

Duration: 0:42
Meet CircuitPython Turbo from Adafruit. CircuitPython Turbo gives the busiest parts of your Python project a faster way to run. "Turbo" translated selected Python functions into instructions the chip can execute directly…
3D Hangouts –  Franky, E-Ink and Smiley Stitched Mask [not-audio_url] [/not-audio_url]

Duration: 44:24
This week @adafruit Pedro is back with progress on the e-ink display project. Noe is in the progress of writing up a guide for the Franky candy dispenser project. This weeks time lapse features a smiley stitched mask. Fe…
JP’s Product Pick of the Week  9/8/26 [not-audio_url] [/not-audio_url]

Duration: 19:00
#newproducts JP’s Product Pick of the Week 9/8/26 Adafruit 2.23" Monochrome OLED Bonnet for Raspberry Pi https://www.adafruit.com/product/4567 Deep discount during livestream Visit the Adafruit shop online - http://www.a…
CircuitPython Weekly Meeting for September 8, 2026 [not-audio_url] [/not-audio_url]

Duration: 26:58
Notes document is available here, with timecodes: https://github.com/adafruit/adafruit-circuitpython-weekly-meeting/blob/main/2026/2026-09-08.md Join here for the chat all week: http://adafru.it/discord The CircuitPython…
Smiley Stitched Mask [not-audio_url] [/not-audio_url]

Duration: 1:00
Every week we'll 3D print designs from the community and showcase slicer settings, use cases and of course, Time-lapses! This Week: Smiley Stitched Mask By ONI.FORGE makerworld.com/en/models/1902039-smiley-tpu-stitched-f…