I got a drive connected. I have found two problems. First the step and direction pulses coming out of the RA axis were only about 1/2 volt. I found in the setup you still had pins set for 11,12,and 13:
#define HADirPin 11 // Pin 11 (Dir) PB3 PB5
#define HA5vPin 12 // Pin 12 (5V?) PB4 PB6
#define HAStepPin 13 // Pin 13 (Step) PB5 PB7
I set these to 10,11,12 and got full voltage out of the pin.
Next problem, either way I am seeing pulsing on the direction pin when it is moving. This should not happen.
Step form is really rough at tracking speed. It was better before I changed those pins to 10,11, and 12. Maybe code conflict? Here is the step waveform, you can see it getting shorter and longer, sorry for the quality, I just grabbed my battery powered scope.
Untitled by
macona, on Flickr
This is what is going on at the direction pin at the same time. There were pulses here before and after I changed the pins:
Untitled by
macona, on Flickr
Last issue, with the new driver it is taking about a full minute until sky planetarium connects with the teensy, from button click to green indicator.