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add a note about sharing the SPI bus with SD cards and other devices #44

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Feb 9, 2021
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add a note about sharing the SPI bus with SD cards and other devices #44

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10 changes: 10 additions & 0 deletions README.rst
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Expand Up @@ -57,6 +57,16 @@ select (cs) connections.
with open("/sd/test.txt", "w") as f:
f.write("Hello world\n")

Sharing the SPI bus with other devices
======================================

.. important::
If the same SPI bus is shared with other peripherals, it is important that
the SD card be initialized before accessing any other peripheral on the bus.
Failure to do so can prevent the SD card from being recognized until it is
powered off or re-inserted.


Contributing
============

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