kicad-developers team mailing list archive

[Tomasz Wlostowski <tomasz.wlostowski@xxxxxxx>]

On 20.08.2015 16:29, Jeppe Johansen wrote:
> Hi,
> 
> I've been working on adding support for entering stackup information and
> using that info when length tuning traces.
> 
> Some screenshots:
> http://j-software.dk/kicad/thickness.png
> http://j-software.dk/kicad/length.png
> 
> Patch here(warning, back up any .kicad_pcb files before you save. The
> format is changed to include layer heights):
> http://j-software.dk/kicad/kicad_stackup.patch
> 
> Getting it into the meander placer required a bit of hacking to process
> vias and find all segments connecting to it. That part is a bit ugly,
> but it works. Also the length calculation is duplicated for each tool
> variant. Unifying those in a single place would be great. For now my
> patch only modifies the single trace length tuner. 

Hi Jeppe,

Thanks for the patch.

I'm not sure if we should define separate layers for cores/prepregs,
though. How are they going to be stored in .kicad_pcb file? What if
there is more than one layer of dielectric between each two adjacent
layers? Maybe a new dialog for defining the complete stackup (including
dielectric factors, losses, etc) would be a better idea?

Regards,
Tom