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.