I did a blog post showing how to use UART4 to talk to an ATmega328p [1]. My ATmega was at 3.3V though, so you'll need to use logic level converters (MOSFETs) to convert between your 5V micro and the Beagle, which operates at 3.3V logic levels. This blog post [2] uses the 5V version and shows how to use the logic level converters.
If you have a recent debian image, you can enable UART 4 with the following command: echo BB-UART4 | sudo tee /sys/devices/bone_capemgr.*/slots If you don't have the BB-UART4-00A0.dtbo in /lib/firmware, you should probably upgrade your BBB. After that command, you should see /dev/ttyO4 appear, which is the UART you seek. You may need to change the baud rate of your serial line, do that with this command: sudo stty -F /dev/ttyO4 9600 Good luck, Josh [1] http://datko.net/2013/11/11/bbb_atmega328p/ [2] http://www.instructables.com/id/Program-an-Arduino-using-BeagleBone-without-USB/?ALLSTEPS -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
