No step pulse output from parallel port

skarnsungen wrote:

I'm now sure that there is some activity at the step pins as I can better registrer the voltage shift after raising the timing. You say that stepping happen very fast, but I thougth it was as simle as when I set step -timing and step space to 500000 ns I would get at pulse lasting 0,5 sec every 0,5 sec. Probably wrong???

I missed this first time round, but there are a couple of things worth noting here.

The way that Stepconf configures a stepgen by default is to use the Parallel Port "Reset" function. This means that the step pins are set high when required, then at the end of all the base-thread activity the Reset function is called, which waits for the requested time and then sets the selected pins back to low.
The reset time is set to the step-length timing, normally a few microseconds.

Note, however, that the reset function stops everything dead waiting for the reset time to elapse. if Step-len is longer than the base thread period then the computer will lock up completely. (Actually, I rather hope there are safeguards in place to prevent that)

You _can_ set up to have extremely long step times by manually editing the HAL file to remove the "reset" function.