Anyone used BBB PRUs?

I’ve just bought a BBB to try it out, should be interesting for quite a few applications.

Don’t know what I’m talking about?
http://www.element14.com/community/community/designcenter/single-board-computers/next-gen_beaglebone/blog/2013/05/22/bbb--working-with-the-pru-icssprussv2

The APM flight controller can be run on the BBB: http://dev.ardupilot.com/wiki/building-the-code/building-for-beaglebone-black-on-linux/

It uses the PRU’s for reading/writing PWM signals.

Funny that. I am getting into using the BBB with the APM, looking at linux-rt (one situation where the PRUs get used) on it.

I’m more interested in implementing digital interfaces with it, something that you’d typically have a PC to process the data and a uC to do all the real world interfacing. The possibility to have an application processor running full up linux plus real time stuff in the one shared memory space is very appealing to me.

I’m looking at using one as the replacement guts for an old iBook (1999 model, with PPC & 64M RAM). When I was doing my research, it was the only ARM-based board that seemed to support suspend & hibernate, which is kind of important for a laptop.