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Re: [PATCH] [RFC] Exporter for Mentor Hyperlynx


On 05/04/2019 18:04, Wayne Stambaugh wrote:
> Tom,
> On 4/4/19 8:16 PM, Tomasz Wlostowski wrote:
>> Hi,
>> We needed to do some signal/power integrity simulations on one of our
>> Kicad designs and in order to do that, we needed to convert a Kicad PCB
>> to Hyperlynx format. Luckily, the format is simple, all text and well
>> documented in [1], so here comes a patch that adds a Hyperlynx exporter.
>> Notes:
>> - since Kicad doesn't have a concept of board stackup (permittivities,
>> loss tangent, dielectric types, etc.), the exporter writes a dummy
>> stackup. Edit it to match the PCB spec in Hyperlynx.
>> - no support for offset pad holes, slotted pad holes,
>> trapezoid/polygonal pads (it seems HL format doesn't support such
>> features or I need to figure out how to emulate them).
>> - no support for thermal pads (yet)
>> - no error reporting.
>> Looking forward to your feedback & wish you happy testing,
>> Tom
>> [1] http://www.ibis.org/birds/bird33.txt
> Your patch built and tested without issue.  I just have a few minor
> comments:
> Please remove all commented out debugging output code and one instance
> of wxLogDebug unless you are planning to some additional debugging in
> the future.  In which case, use wxLogTrace.
> Per section 4.2 in the coding policy[1], in source files there should be
> 2 blank lines between functions except when they are in the class
> definition in which case there should be 1 blank line.  I also saw a
> couple of if{} statements with missing blank lines above.
> It is no longer necessary to wrap strings with the wxT() macro when
> using the wxString assignment operator.
> The OUPUTFORMATTER::Print function can throw an IO_ERROR exception.  If
> you don't handle this, KiCad will most likely crash when it occurs.  It
> would be a good idea to add a try/catch block in
> HYPERLYNX_EXPORTER::Run() and return false when a exception is caught.
> The copyright dates in the qa files are 2018.

Thanks Wayne,

It looks my settings for VSCode formatter don't catch all Kicad Coding
Style rules. Need to fix that ;-). I'll push a version with fixes
(including error handling via exceptions).


PS. We need to think about factoring out the exporters (including their
private settings dialogs) to some sort of plugins...

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