This is the V1.1 of the PICStep board. The first version was a bit smaller, but didn't have enough PCB heatsinking for pin 9 of the LMD18245 like their specification required. I'll be publishing the full GSchem and PCB files when it's not 2:26am.
This is a first public release of the PICStep firmware. It hasn't been physically tested with any hardware yet, but it has been extensively tested on a testing breadboard with LED's, and in the MPLAB simulator. Any destruction or damaged caused by the use of this firmware is not my fault! :) (But it works good anyhow! 8)
Here is a PNG of the driver board. It includes an ICP socket to program the PIC while in-circuit, I/O port to control the driver (Step, Direction, Brake, Mode Bits).
I'm starting to create the PCB layout. Check back soon!
Here is my breadboard with a development version of the firmware displaying on a 10 LED bar. I'm testing the interupt routine and the mode switching. I'm pretty much pushing the limits on the I/O of the 16F628, but then again what's the use of all those I/O pins if you never use them!
Currently I've got the design layed out as followed :-
