kicad-developers team mailing list archive

[Wayne Stambaugh <stambaughw@xxxxxxxxx>]

Unless I missed something, the patch only hides invisible pins in the
component chooser correct?  If that is all that it does, I'm fine with
merging it.  Any changes to how the schematic editor handles connections
to invisible pins would definitely be after v5 is released.

Wayne

On 2/7/2018 8:32 AM, Jon Evans wrote:
> 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
> <mailto: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>
>     >> <mailto: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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