Troubleshoot the 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.