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Troubleshoot BeagleBone Black SPI Interface
Why Can I Not Enable SPI Bus 1?
SPI bus 1 shares pins with HDMI, which is enabled by default. Use
showPins to view the current pin usage. If HDMI is enabled,
disable HDMI before using enableSPI to enable this bus. For
information on how to disable HDMI, see the BeagleBone® Black hardware documentation.
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