add DEFAULT_SD_* for Metro RP2040 and Feather RP2040 Adalogger#10968
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mikeysklar wants to merge 1 commit intoadafruit:mainfrom
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add DEFAULT_SD_* for Metro RP2040 and Feather RP2040 Adalogger#10968mikeysklar wants to merge 1 commit intoadafruit:mainfrom
mikeysklar wants to merge 1 commit intoadafruit:mainfrom
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…040 Adalogger Both boards have onboard microSD slots but were missing the DEFAULT_SD_* pin defines that enable CircuitPython's native SD automount. Without these, SD-over-USB-MSC only worked via user boot.py code and hit the heap-mount race in get_vfs(). Pin wiring verified on hardware against the board schematics; CD pin polarity (DEFAULT_SD_CARD_INSERTED=true) confirmed by runtime test. Companion to adafruit#10963 (automount at filesystem init) and #NNNN (per-LUN PREVENT_ALLOW response). Fixes the last mile for adafruit#10965.
This was referenced Apr 22, 2026
mikeysklar
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Why
Both boards have onboard microSD slots but their
mpconfigboard.hfiles don't declareDEFAULT_SD_*pin defines. Without these, CircuitPython's native SD automount can't fire and users fall back to mounting SD fromboot.py— which hits the VM-heap race inget_vfs()and doesn't expose the card reliably over USB MSC on macOS.Adding the pin defines lets the native automount path take over (SD is set up before USB enumerates, off-heap, stable across resets) and makes SD-over-MSC "just work" on these boards once #10963 and #10967 land.
What this changes
Both use
DEFAULT_SD_CARD_INSERTED=true(CD pin reads HIGH when card present — verified on hardware).Tested on
Both boards verified end-to-end on macOS 26.x (Apple Silicon) and Linux (Ubuntu 24.04): SD mounts as the second USB drive, card insert/remove cycle works, contents readable.
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