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SPI
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About
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For some APIs, the reference to be used is the same as the Arduino Core.

Arduino API Reference
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`SPI Reference <https://www.arduino.cc/reference/en/language/functions/communication/spi/>`_

`SPI Description <https://docs.arduino.cc/learn/communication/spi>`_

Example
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To get started with SPI, you can try:

SPI Multiple Buses
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.. literalinclude:: ../../../libraries/SPI/examples/SPI_Multiple_Buses/SPI_Multiple_Buses.ino
    :language: arduino