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Faster SD clock in USB mode (opt-in) - #439

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bmorcelli merged 1 commit into
bmorcelli:mainfrom
konsumer:msc-sd-clock
Oct 1, 2026
Merged

bmorcelli merged 1 commit into
bmorcelli:mainfrom
konsumer:msc-sd-clock

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@konsumer

@konsumer konsumer commented Oct 1, 2026

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macOS 26 fails to mount the card (FSKit EIO) when the FAT read at the default 4 MHz SD clock is too slow, so boards can set MSC_SD_FREQ_HZ for a verified faster clock in USB mode; enabled for Cardputer (20 MHz), tested on a Cardputer ADV.

@bmorcelli
bmorcelli merged commit 0999cec into bmorcelli:main Oct 1, 2026
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2 participants