zephyr-cp: document the overlay pitfalls behind two flash-layout bugs - #17

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zephyr-cp-overlay-pitfalls-doc

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Commits on Sep 17, 2026

Merge pull request #11405 from mikeysklar/samx5x-turbo-hallowing-uartlogger2
tannewt
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e6a6916
Merge remote-tracking branch 'origin/main'
weblate
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6b36fac
Merge pull request #11406 from mikeysklar/load-native-nrf52-reenable
tannewt
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e543fcd
Merge remote-tracking branch 'origin/main'
weblate
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f11f0fc
Merge pull request #11410 from dhalbert/double-typecode-guard
tannewt
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6e982d2
Merge remote-tracking branch 'origin/main'
weblate
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139246e
Merge pull request #11407 from dhalbert/qstr-blob
tannewt
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9ad9876
Merge remote-tracking branch 'adafruit/main' into littlefs
tannewt
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fe8f49b
Eliobot S3: keep code.py, clarify boot.py and pin comments
rboutrois
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2e74a70
Run the size record download from github-script

dhalbert
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2682ba8
Merge pull request #11412 from weblate/weblate-circuitpython-main
tannewt
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268a168
Start the size table with every board shown

dhalbert
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541fa36
bitmaptools.blit fast path
FoamyGuy
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29db520
Auto-update the Zephyr autogen files
tannewt
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04001aa

Commits on Sep 18, 2026

Merge pull request #11413 from FoamyGuy/bitmaptools_blit_fastpath
tannewt
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dd72cb9
Merge pull request #11411 from Eliobot/eliobot-s3-board
tannewt
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2b386e2
Merge pull request #11408 from dhalbert/ci-firmware-sizes
tannewt
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50f1ff0
Merge pull request #11414 from tannewt/auto_update_zephyr_autogen
dhalbert
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9b392c7
zephyr-cp: compile in parallel when make's jobserver is not a fifo

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5a5df61
zephyr-cp: stop recompiling every file on every build

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67751f6
build_release_files: skip the extra languages for simulator boards on every event

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7469721
board: Rename CIRCUITPY_BOARD_EXTRA_DICT_ITEMS to CIRCUITPY_BOARD_HARDWARE_KEYS

mmabey
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33b8d1a
hardwarekey: Use the MAKE_ENUM macros for Purpose

mmabey
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99f7f21
zephyr-cp CI: disable action-zephyr-setup's ccache

dhalbert
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0a03499
Merge pull request #11416 from dhalbert/zephyr-cpbuild-parallel-fallback
tannewt
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7b8181c
Merge pull request #11319 from mmabey/mabey/esp32-hmac-efuse-planning
tannewt
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108271b
Update translation files
weblate
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102548e
Fix error and add test branch
tannewt
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aec46fd
Merge pull request #11418 from weblate/weblate-circuitpython-main
dhalbert
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1043a70
Print out the logs
tannewt
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337c8bc
Support pin muxing through IOBroker
tannewt
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40147ec
Pick up zephyr UART fix
tannewt
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bc6c07c

Commits on Sep 19, 2026

zephyr-cp: create libcircuitpython.a from scratch on every build

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c61e6ed
zephyr-cp: quote the Kconfig fragment list so DEBUG=1 works

dhalbert
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d968275
zephyr-cp: do not reconfigure for every language build

dhalbert
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5834c02
raspberrypi: update pico-sdk to 2.3.1

mikeysklar
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a238933
raspberrypi: rp2pio: claim pinless state machines without a gpio range

mikeysklar
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f7bbc1f
Update to gcc 15.3.Rel1 from 15.2.Rel1
dhalbert
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770deee
raspberrypi: add -Wno-array-bounds for mbedtls with gcc 15.3

dhalbert
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8253e34
picogame: restore the panel to RGB565 when a program ends
lynt-smitka
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b58979a
picogame: pack RGB444 on the generic strip path too
lynt-smitka
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d653095
atmel-samd: send INVOFF (0x20), not 0x2a, in ST7735 init sequences
lynt-smitka
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1031352
picogame: Canvas.text raises NotImplementedError without fontio
lynt-smitka
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9d82d47
atmel-samd: picogame fast Display backend on the SERCOM SPI DMA
lynt-smitka
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fcdbbf9
atmel-samd: enable picogame on pybadge
lynt-smitka
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ea51b2f
Update .devcontainer/cortex-m-toolchain.sh

dhalbert
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mikeysklar
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6632fbd
Merge pull request #11429 from MakerClassCZ/st7735-invoff
dhalbert
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a8e25ba
Merge pull request #11428 from MakerClassCZ/picogame-reset-colmod
dhalbert
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090c02b
Merge pull request #11427 from dhalbert/gcc-15.3.rel1
dhalbert
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67c31ab

Commits on Sep 20, 2026

Merge pull request #11426 from mikeysklar/pico-sdk-2.3.1
dhalbert
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844fe6f
Merge pull request #11430 from MakerClassCZ/picogame-samd-dma
dhalbert
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8808ab7
espressif: add ESP32-S3-BOX-3 board definition
Moises Trovo
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db18e54
Merge pull request #11423 from dhalbert/zephyr-quote-extra-conf
dhalbert
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8ff3f61
Merge pull request #11431 from mtrovo/box3-board-definition
dhalbert
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822cbb2
Apply batched suggestions from code review

dhalbert
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mikeysklar
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f220b8e
allow undo of DEBUG=1 without rm -rf _build/*
dhalbert
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cce234f
Merge branch 'zephyr-skip-reconfigure' of https://github.com/dhalbert/circuitpython into zephyr-skip-reconfigure
dhalbert
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0018c4c
Merge branch 'main' into zephyr-skip-reconfigure
dhalbert
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027d6ff
Merge pull request #11422 from dhalbert/zephyr-fresh-archive
dhalbert
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26f558c
Merge pull request #11424 from dhalbert/zephyr-skip-reconfigure
dhalbert
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9701f33
raspberrypi: build with -O2 plus the two -O3 flags that measure
lynt-smitka
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11d99f3
raspberry_pi_pico, raspberry_pi_pico_w: enable picogame
lynt-smitka
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7722194

Commits on Sep 21, 2026

_bleio HCI: use extended advertising commands on 5.x controllers

dhalbert
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a8bb681
_bleio HCI: send ACL data with the non-flushable start PB flag

dhalbert
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claude
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1af5d49
supervisor/usb: map nrf52_errata_199 for the nRF52 TinyUSB driver

mikeysklar
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d0082e3
lib/tinyusb: bump to master for the ESP32-S2/S3 rx race fix

mikeysklar
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1e55bbd
raspberrypi: add alarm support for RP2350

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b98589d
Provide version
tannewt
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3ce4001
Merge pull request #11433 from mikeysklar/tusb-repin
tannewt
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9d73f07
Merge pull request #11358 from MakerClassCZ/pg-pico
tannewt
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fa6f1c7
Merge remote-tracking branch 'adafruit/main' into zephyr_pin_muxing
tannewt
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ed0b3aa
Include ignored module file
tannewt
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2f444da
Merge pull request #11421 from dhalbert/zephyr-ci-disable-ccache
tannewt
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324b493
Fix nrf52840s with duplicate uses
tannewt
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cbcbafb
Merge pull request #11436 from adafruit/zephyr-autogen-test
dhalbert
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db9ff26
Switch synthio to mp_stream
tannewt
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150230d
Add note about supervisor filesystem APIs
tannewt
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5f5efe1
raspberrypi: use pico_low_power for RP2350 deep sleep

mikeysklar
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claude
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0a305ee
Switch wavefile to stream too
tannewt
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cf227dc
_bleio HCI: explain the extended advertising enable duration values

dhalbert
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claude
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fd039bd
Fix native_sim by adding 1:1 pin mapping
tannewt
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ad53ec5
Remove broadcom and renode ports
tannewt
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1ca141d
Broadly enable finalizers
tannewt
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7f1de43
Remove submodules too
tannewt
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7e28ba9
Merge remote-tracking branch 'adafruit/main' into littlefs
tannewt
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b8ce7b2
Update eliobot
tannewt
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935dccd
Remove litex too
tannewt
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7f759e8
Handle removed ports in ci_set_matrix
tannewt
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f651812

Commits on Sep 22, 2026

Merge pull request #11352 from tannewt/littlefs
dhalbert
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bebfe75
Regenerate zephyr-cp autogen_board_info.toml files

dhalbert
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github-actions[bot]
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f2ef1c3
Merge pull request #11440 from adafruit/zephyr-autogen-board-info
dhalbert
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11cacac
random: randint() no longer rejects the largest upper bound

dhalbert
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1b1d3e2
Fix docs build after port removal

dhalbert
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0bced68
Remove CIRCUITPY_VIDEOCORE plumbing

dhalbert
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8574c51
Drop stale broadcom mentions from comments

dhalbert
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e69e36b
Remove litex, renode, and broadcom from port lists

dhalbert
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e98c74b
Remove litex CI deps action

dhalbert
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52c4407
Merge pull request #11438 from tannewt/remove_broadcom_renode
dhalbert
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f38f20d
Merge pull request #11434 from mikeysklar/rp2350-alarm
tannewt
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93ae504
use clearer name for forever advertising duration
dhalbert
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da5607d
Merge branch 'main' into bleio-hci-extended-advertising
dhalbert
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1f954bd
Regenerate zephyr-cp autogen_board_info.toml files

tannewt
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github-actions[bot]
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afeacce
Merge pull request #11443 from dhalbert/fix-randint-upper-bound
tannewt
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c81412b
Tweaks based on review feedback
tannewt
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cfd2f74
Merge branch 'main' into zephyr-autogen-board-info
dhalbert
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5e6547c
Merge pull request #11444 from adafruit/zephyr-autogen-board-info
dhalbert
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1fba35a
Merge remote-tracking branch 'adafruit/main' into enable_finalizers
tannewt
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2d7d4d7
Merge pull request #11420 from tannewt/zephyr_pin_muxing
dhalbert
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d81985f
Merge pull request #11432 from dhalbert/bleio-hci-extended-advertising
tannewt
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00ec6e3
Merge branch 'main' into failures-reported-as-success
tannewt
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944cc0b
Merge remote-tracking branch 'adafruit/main' into enable_finalizers
tannewt
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cbd64f1
microcontroller: add cpu.architecture and show it in boot_out.txt

mikeysklar
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claude
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a6685b9
web_workflow: report the native architecture in version.json

mikeysklar
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dc13dfe
Remove unneeded global pin number
tannewt
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e06317d
main: put the architecture on its own boot_out.txt line

mikeysklar
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d1b754a
Merge pull request #11383 from peterbay/failures-reported-as-success
tannewt
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0843ac7
Zephyr autogen auto-update fixes
tannewt
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325f090
Wake the main task on UART RX
tannewt
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2b8a218

Commits on Sep 23, 2026

Merge pull request #11439 from tannewt/enable_finalizers
dhalbert
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c300b9d
Merge pull request #11448 from tannewt/zephyr_fix_slow_any_key
dhalbert
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6165b57
Merge pull request #11447 from tannewt/auto_zephyr_tweaks
dhalbert
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8b9353d
Merge pull request #11445 from mikeysklar/sys-architecture
dhalbert
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fe26831
Merge branch 'adafruit:main' into rename-realpicoexpander
Jerzeek
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73d9668
Merge pull request #11449 from id-studiolab/rename-realpicoexpander
dhalbert
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0502ef1
Re-pin Pico-PIO-USB to the adafruit fork

mikeysklar
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claude
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02f124c
Merge pull request #11450 from mikeysklar/pico-pio-usb-adafruit-fork
tannewt
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8f94f74
espressif: update esp-protocols to circuitpython2026
grgrant
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79189ea
py/builtinimport: look for foo.<arch>.mpy between foo.py and foo.mpy

mikeysklar
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claude
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98b0a67
docs: describe the foo.<arch>.mpy import order
mikeysklar
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30741fa
Regenerate zephyr-cp autogen_board_info.toml files

tannewt
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github-actions[bot]
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ad2c24d
Merge pull request #11446 from adafruit/zephyr-autogen-board-info
dhalbert
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ac3ad80
BUILDING: lead with the submodules one board actually needs
lynt-smitka
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b2b11a8
tests: drop the bytes() wrapper around the .mpy literal

mikeysklar
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claude
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8b6895d
Update BUILDING.md

lynt-smitka
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dhalbert
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8136eff
py/builtinimport: skip the .<arch>.mpy probe when it would not fit

mikeysklar
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claude
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f271f9e
displayio: step the TileGrid tile terms along the row
lynt-smitka
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e2d97af
Merge pull request #11451 from grgrant/esp-protocols-circuitpython2026
dhalbert
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d65f6f2
picogame: project the basis dot products without a 64-bit multiply
lynt-smitka
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49547ec
picogame: take the divide and the 64-bit multiplies out of the road curve
lynt-smitka
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c738a3e
picogame: exact 32-bit forms for the raycaster and the value noise

lynt-smitka
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peterbay
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43aa036
picogame: hoist the sprite blit's row loop, and copy misaligned rows by hand

lynt-smitka
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peterbay
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f388484
picogame: word-fill the surfaces, block-fill the maps

lynt-smitka
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peterbay
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b5849cd
picogame: cheaper text, triangle setup, particles and bounds tests

lynt-smitka
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peterbay
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e253861
bitmaptools hardfault fix
FoamyGuy
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6392e33
Merge branch 'main' into bitmaptools_fixes
FoamyGuy
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5b58c7c

Commits on Sep 24, 2026

Merge pull request #11455 from FoamyGuy/bitmaptools_fixes
dhalbert
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d56a2f7
Merge pull request #11454 from MakerClassCZ/engine-opt
dhalbert
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91b4b8c
Merge pull request #11452 from MakerClassCZ/docs-fetch-submodules
dhalbert
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81931fe
py/builtinimport: rebuild each .mpy candidate from the stem

mikeysklar
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claude
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1ec1bbf
Merge pull request #11453 from mikeysklar/arch-import-lookup
dhalbert
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49417b0
update Pico-PIO-USB submodule. add CIRCUITPY_USB_HOST_ISO_BUFFER_SIZE config. Enable USB Iso on Fruit Jam
FoamyGuy
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8b9e2fb
raise error instead of print, change message
FoamyGuy
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333472c
Merge pull request #11459 from MakerClassCZ/displayio-tilegrid-fast
dhalbert
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746577d
Merge pull request #11458 from FoamyGuy/usb_host_bulk_and_buffer_config
dhalbert
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520805e
Update translation files
weblate
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c60a5ae
rp2 sdioio: make flush() wait for the SD card to finish

mikeysklar
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claude
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c1a37fd
displayio: composite common TileGrid rows without per-pixel calls
lynt-smitka
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c239882
rp2 sdioio: fix comments about when writes finish

mikeysklar
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claude
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298e640

Commits on Sep 25, 2026

docs: generate llms.txt at the end of the HTML build
lynt-smitka
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8c352a9
displayio: 2048 byte area buffer on ports with a 24 KB stack
lynt-smitka
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794b941
busdisplay: refresh rotated displays in bands of columns
lynt-smitka
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bccf825
displayio: cache 64 bytes of an OnDiskBitmap file
lynt-smitka
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578d2eb
Merge pull request #11465 from MakerClassCZ/displayio-odb-read-order
tannewt
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bfa6e1d
Merge remote-tracking branch 'origin/main'
weblate
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fee3310
Merge pull request #11464 from MakerClassCZ/displayio-area-buffer
tannewt
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68230d3
Merge remote-tracking branch 'origin/main'
weblate
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54710c0
Merge pull request #11463 from mikeysklar/rp2-sdioio-sync
tannewt
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f1512fe
Merge remote-tracking branch 'origin/main'
weblate
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348a4b3
Merge pull request #11461 from MakerClassCZ/displayio-row-fast
tannewt
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1eed72a
Merge remote-tracking branch 'origin/main'
weblate
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d2129df
Merge pull request #11462 from MakerClassCZ/docs-llms-txt
dhalbert
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946bae2
Merge remote-tracking branch 'origin/main'
weblate
committed
e70cb59
Merge pull request #11460 from weblate/weblate-circuitpython-main
tannewt
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bf390bf
Merge pull request #11466 from weblate/weblate-circuitpython-main
dhalbert
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4453bba
Integrate Adaboot into Zephyr port
tannewt
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a42fa71

Commits on Sep 28, 2026

Add configurable USB CDC interface names
BroadwellConsultingInc
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847bcb1
update ulab to 15e9997
dhalbert
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2a17d5a
Make sure hex outputs are enabled
tannewt
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1be4f31
make translate
dhalbert
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667c012
raspberrypi: allow 8 shared IRQ handlers
lynt-smitka
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32c0a1b
Fix STM ram check
tannewt
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4eb89ee
ulab: disable scipy.integrate and ndarray modulo to save flash

dhalbert
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claude
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5937b7d
Limit CAN reset
tannewt
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7ef6550
analog: switch to finalizer cleanup (CIRCUITPY_BULK_RESET = 0)
tannewt
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02eaec3
cxd56: switch to finalizer cleanup (CIRCUITPY_BULK_RESET = 0)
tannewt
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6a06dfb
silabs: switch to finalizer cleanup (CIRCUITPY_BULK_RESET = 0)
tannewt
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5ec3cea

Commits on Sep 29, 2026

busio: add a non-blocking SPI write for internal use
lynt-smitka
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f0f8068
displayio: send one area buffer while composing the next
lynt-smitka
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aac8aab
Fix USB CDC interface names on Zephyr builds
BroadwellConsultingInc
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cb302e4
enable picogame on Metro RP2350
FoamyGuy
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ad9f184
Merge pull request #11470 from tannewt/more_never_reset_removal
dhalbert
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d47f5a8
Trigger CI after Zephyr build fix
BroadwellConsultingInc
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f7cf0e1
enable CIRCUITPY_PICOGAME_FAST_DISPLAY on metro rp2350
FoamyGuy
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d4e22ed
Omit USB CDC custom names from reduced builds
BroadwellConsultingInc
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04bcb71
Merge pull request #11471 from MakerClassCZ/rp2-shared-irq-slots
tannewt
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8c9a980
Merge pull request #11457 from tannewt/zephyr_uf2_boot
tannewt
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dcd3c20
Merge pull request #11469 from dhalbert/update-ulab
tannewt
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65942b5
Update translation files
weblate
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0cc3666
Merge pull request #11476 from weblate/weblate-circuitpython-main
dhalbert
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9301040
Merge pull request #11474 from FoamyGuy/enable_picogame_metro_rp2350
dhalbert
authored
5c54519

Commits on Sep 30, 2026

Merge pull request #11473 from BroadwellConsultingInc/usb-cdc-interface-names
tannewt
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350e789
Regenerate zephyr-cp autogen_board_info.toml files

tannewt
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github-actions[bot]
committed
2ed2962
Add sdkconfig for Waveshare ESP32 C5 LCD 1.47 board
dglaude
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de87fa4
All files needed for waveshare_esp32_c5_lcd_1_47
dglaude
authored
cf93fc0
Merge pull request #11477 from adafruit/zephyr-autogen-board-info
tannewt
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395b187
Merge branch 'main' into waveshare_esp32_c5_lcd_1_47
dglaude
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f8f3f59

Commits on Oct 1, 2026

busio: name the async SPI end function for any transfer
lynt-smitka
committed
c62376d
Move the async flag header to supervisor/shared
lynt-smitka
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33f89f3
Add analogio support to Zephyr
tannewt
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a14c249
Merge pull request #11468 from MakerClassCZ/display-bus-async-core
tannewt
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b60b0fa
Clean up mpconfigboard.mk by removing duplicates
dglaude
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dac80b7
Merge branch 'main' into waveshare_esp32_c5_lcd_1_47
dglaude
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23e112e
Enable large user filesystem layout for 4MB flash
dglaude
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1f39716
Simplify sdkconfig by using default settings
dglaude
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d39230a
Update USB manufacturer and flash mode settings
dglaude
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8a55b49
Use adc trace emulation
tannewt
committed
4a2608e
zephyr-cp: bump Adaboot to fix the nRF54LM20 DK USB console

dhalbert
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claude
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8e47b73
Add display object to board module globals
dglaude
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d2391be
mimxrt10xx: switch to finalizer cleanup (CIRCUITPY_BULK_RESET = 0)
tannewt
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760ae36
Merge pull request #11484 from dhalbert/zephyr-dk-console
dhalbert
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9a03dda
Add serial ABC row addressing to rgbmatrix

ladyada
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ladyada
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b6ea0b1
stm: switch to finalizer cleanup (CIRCUITPY_BULK_RESET = 0)
tannewt
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9d17935
nordic: switch to finalizer cleanup (CIRCUITPY_BULK_RESET = 0)
tannewt
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ed557c7

Commits on Oct 2, 2026

Update Protomatter for reliable ESP32 multi-bit refresh

ladyada
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ladyada
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3266456
Update Protomatter pin after formatting cleanup

ladyada
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ladyada
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37e8da8
Point rgbmatrix ABC support at the unified Protomatter master candidate

ladyada
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ladyada
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aecd295
Add displayio module inclusion in pins.c
dglaude
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a052d1b
Update Protomatter with Arduino stop and resume fixes

ladyada
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ladyada
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08cdf24
Merge pull request #11487 from tannewt/remove_never_reset-stm
dhalbert
authored
aabd9a3
Merge pull request #11481 from tannewt/zephyr_analogio
dhalbert
authored
6fefe63
Merge main into rgbmatrix-abc

ladyada
and
ladyada
committed
b98fc50
Merge latest main updates into rgbmatrix-abc

ladyada
and
ladyada
committed
a4a36eb
Validate RGBMatrix arguments before reserving a display bus

ladyada
and
ladyada
committed
b7420c5
rgbmatrix: use an enum for row addressing

ladyada
and
ladyada
committed
9a826b3
Rewrite board.c comments to only describe current behavior
tannewt
committed
2aa1b0d
Remove extra braces
tannewt
committed
b6bb7ba
Merge pull request #11488 from tannewt/remove_never_reset-nordic
dhalbert
authored
16ad502
Merge branch 'main' into waveshare_esp32_c5_lcd_1_47
dglaude
authored
0c02114
Merge pull request #11485 from tannewt/remove_never_reset-mimxrt10xx
dhalbert
authored
7438139
Change boot button to GPIO28 for safe mode
dglaude
authored
90e2194
Update GPIO pin assignments for buttons
dglaude
authored
e34619f
Merge branch 'main' into waveshare_esp32_c5_lcd_1_47
dglaude
authored
0f54a6a
Implement RTC on Zephyr
tannewt
committed
3156883
Merge branch 'main' into rgbmatrix-abc
ladyada
authored
8e3c267
Merge branch 'main' into fix/rgbmatrix-argument-validation
ladyada
authored
fed158d
Merge pull request #11480 from dglaude/waveshare_esp32_c5_lcd_1_47
tannewt
authored
5d73e28
Merge pull request #11486 from ladyada-eagleclaw/rgbmatrix-abc
tannewt
authored
aabd3bc
Merge pull request #11490 from ladyada-eagleclaw/fix/rgbmatrix-argument-validation
tannewt
authored
eec31fe

Commits on Oct 3, 2026

Merge pull request #11491 from tannewt/zephyr_rtc
dhalbert
authored
35210c2
zephyr-cp: document the overlay pitfalls behind two flash-layout bugs

tyeth
and
claude
committed
d68c306