I use LinuxCNC running on the BeagleBone. Details are on my blog, along with working SD card images.
Other options I'm aware of include using the Replicape software from Elias, or the BeBoPr software from Bas (although I don't think he's released the PRU code, so it might be hard to move the pins to match this board). It might even be possible to do something really crazy, like port Marlin to the PRU, but I don't think the PRUs have enough program memory for that without major surgury to break out significant chunks of code to run on the ARM.
Other options I'm aware of include using the Replicape software from Elias, or the BeBoPr software from Bas (although I don't think he's released the PRU code, so it might be hard to move the pins to match this board). It might even be possible to do something really crazy, like port Marlin to the PRU, but I don't think the PRUs have enough program memory for that without major surgury to break out significant chunks of code to run on the ARM.
