On 7/29/15 6:55 AM, Jullian wrote:
> Hi, all:
>
> Now, i am reading the stepgen.c file, and i have some doubts:
>
> (1)what're the main steps to transform from the position offset to pulses?

The best description of how stepgen.c does is probably the source, and 
this documentation:

http://linuxcnc.org/docs/2.6/html/hal/rtcomps.html#sec:Stepgen


> (2)what's the main effect of make_pulse() , update_freq() and update_pos()?

That's described in the doc I linked above, and also in the manpage.  Do 
you have a more specific question?


> (3)can anyone explain the meaning of  Line748:(accum_a-(1<< (PICKOFF-1)))

I'm not sure about this one.


-- 
Sebastian Kuzminsky

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