rp2xxx: Fix Adafruit boards#960
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I noticed that my Adafruit Feather rp2350 worked when I first flashed it, but not after a reset or power cycle. Digging through some code, I found a commit that added support for the Adafruit Feather to the arduino-pico core: earlephilhower/arduino-pico@163b209d#diff-d0d48a8d47fd5d31e3bc70b12159bdcb23a5ab82460bb5972cf61776f4d6768aR34-R42 It sets `PICO_XOSC_STARTUP_DELAY_MULTIPLIER=64`. Seems that these boards have shakier clocks. This change adds support for an optional `xosc_startup_delay_multiplier`, which increases the startup_delay_ms when setting up the external oscillator.
mattnite
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Jun 13, 2026
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Great find, and addition! smh I hope it was worth it adafruit
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I noticed that my Adafruit Feather rp2350 worked when I first flashed it, but not after a reset or power cycle.
Digging through some code, I found a commit that added support for the Adafruit Feather to the arduino-pico core:
earlephilhower/arduino-pico@163b209d#diff-d0d48a8d47fd5d31e3bc70b12159bdcb23a5ab82460bb5972cf61776f4d6768aR34-R42
It sets
PICO_XOSC_STARTUP_DELAY_MULTIPLIER=64.Seems that these boards have shakier clocks.
This change adds support for an optional
xosc_startup_delay_multiplier, which increases the startup_delay_ms when setting up the external oscillator.