The BeagleBone Black ships with the HDMI output enabled, using pins 20-46 on the P8 header. If you're not using HDMI and would like to free up those pins for use as shown in Appendix A, The BeagleBone Black Pinout, you can disable the HDMI output. First, mount the boot partition:
# mkdir /mnt/boot # mount /dev/mmcblk0p1 /mnt/boot
Then, open the bootscript with the
nano text editor:
# nano /mnt/boot/uEnv.txt
Add the following line to the end of the file:
Press Ctrl + X then Y to save and close the file. That new line stops the
capemgr driver from loading the HDMI, and HDMI audio overlays at boot, freeing up the pins for general use.
unmount the ...