On 9/18/2013 12:16 PM, Alex Joni wrote: > Hrmmm, I was kinda in a hurry when I read the original email, so somehow I > assumed the question was for a BBB breakout board / aka cape.
Are you working on a LPT breakout for the BeagleBone?!? If so, that's great! I just started looking into designing one of these, along with an interface board for the RAMPS. Pinout for step/dir/limit generally doesn't matter, but I am hoping to also be able to support a MESA parallel port interface board and run the hm2 driver on the 'Bone. For that, the data lines all need to be in banks where their GPIO direction bit can be set by the PRU safely without using an atomic read-modify-write. It looks like the block of GPIO bank 1 pins, from bits 12-19 would work, and as a plus they are all together so an 8-bit byte doesn't have to get splintered into a bunch of groups spread across several GPIO banks. -- Charles Steinkuehler char...@steinkuehler.net
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