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sdcardio: Configure internal pull-up on MISO #8941

@rgov

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@rgov

According to this page, when communicating with an SD card in SPI mode,

A pull-up on the DO (MISO) cannot be omited, or some cards will fail initialization process.

Image

There exists common_hal_digitalio_digitalinout_set_pull() which can configure internal pull-ups on some MCUs. Is this something sdcardio could do for us?

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