kicad-developers team mailing list archive

[Jon Evans <cdawzrd@xxxxxxxxx>]

We could hold this until after 5.0 and either add an ERC check,  or better
yet make it so that you can't actually make connections to invisible pins?

-Jon

On Feb 7, 2018 08:29, "Maciej Sumiński" <maciej.suminski@xxxxxxx> wrote:

> Hi Wayne,
>
> No, I have not reviewed the patch. I had some doubts about potential
> problems caused by invisible pins creating hidden connections. If user
> is neither aware of their presence when selecting a symbol, nor will
> notice them after they are placed on a schematic sheet then he may end
> up accidentally connecting them to some wires. IIRC we do not have an
> ERC test to check against such case, so I was not sure if it is a safe
> change.
>
> Cheers,
> Orson
>
> On 02/07/2018 02:21 PM, Wayne Stambaugh wrote:
> > Orson,
> >
> > Did you ever respond to Jon about this?  I guess the question is whether
> > or not to show invisible pins in the component chooser.
> >
> > Cheers,
> >
> > Wayne
> >
> > On 1/15/2018 9:31 PM, Jon Evans wrote:
> >> Hi Orson, patch is attached again, hopefully it goes through this time.
> >>
> >> Thanks,
> >> Jon
> >>
> >> On Mon, Jan 15, 2018 at 4:24 AM, Rene Pöschl <poeschlr@xxxxxxxxx
> >> <mailto:poeschlr@xxxxxxxxx>> wrote:
> >>
> >>     On 15/01/18 10:00, Maciej Sumiński wrote:
> >>
> >>         Perhaps we should have an ERC rule
> >>         that warns about invisible pins being connected to a wire, any
> >>         thoughts?
> >>
> >>
> >>     Invisible pins are used for three distinct applications.
> >>
> >>     The first one is to remove clutter by hiding pins that should not be
> >>     connected. ERC will complain if you connect such pins if they have
> the
> >>     electrical type "Not connected".
> >>
> >>     The second application is to create "power labels". A invisible
> power
> >>     input pin is handled as a global label. These pins are meant to be
> >>     connected.
> >>
> >>     The third application is again to remove clutter by stacking pins.
> Here
> >>     you have one visible pin and several other invisible pins at the
> same
> >>     location. (Normally all these pins have the same name and electrical
> >>     type. With the exception of power input pins, power output pins and
> >>     output pins.)
> >>     Such pins are again meant to be connected.
> >>
> >>     This means a ERC rule that complains about connecting hidden pins
> will
> >>     create too many false positives. Having a lot of false positives
> means
> >>     users will start to ignore ERC output.
> >>
> >>     It might be a good idea to have a symbol checker that complains if
> >>     invisible pins are used differently than i described above.
> >>     In other words: complain for invisible pins if they are not part of
> a
> >>     stack or of types NC or power input.
> >>
> >>
> >>
> >>
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