Rob Jansen wrote:

>Hi,
>
>is it possible to invert the DIR signal of the stepgen output of the 
>Mesa 5i20 board?
>On my old (parport) config I had the DIR signal inverted so I was 
>looking for a similar option on the hostmot configuration.
>  
>
One way to do that would be to change the sign of the SCALE on the axes 
that need DIR inverted.

So change it from SCALE=20000 to SCALE=-20000, for instance.

Each pin also has a parameter that ends with "invert_output".  Setting 
this to true will invert the output, just like on the parallel port.
Add something like the following to your HAL file:
setp hm2_5i20.0.gpio.027.invert_output 1
(substituting the correct number for 027, of course :) )

- Steve

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