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sdcardio: Configure internal pull-up on MISO #8941
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Right now |
I'm not sure. Adafruit's breakout board uses a 47kΩ resistor. Espressif has some documentation that suggests a 10k resistor. |
I don't see that pullup in this older breakout: https://learn.adafruit.com/adafruit-micro-sd-breakout-board-card-tutorial/download, or on, say the Feather M0 Datalogger. These boards do work, hmm. @ladyada Have you heard about this desired pullup on MISO on SD cards? |
never heard of it before. traditionally we only need a pullup on the CS line. however, we should initialize the SD card first! |
The page states My gut is that this should be the board's job. Not a use for internal pulls. |
Could be done via #9845. |
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According to this page, when communicating with an SD card in SPI mode,
There exists
common_hal_digitalio_digitalinout_set_pull()
which can configure internal pull-ups on some MCUs. Is this somethingsdcardio
could do for us?The text was updated successfully, but these errors were encountered: