kicad-developers team mailing list archive

[Maciej Sumiński <maciej.suminski@xxxxxxx>]

The ERC check sounds sensible. I know that invisible pins are also used
to place many pins in a single spot, so you can connect multiple pins
with just one wire (think of e.g. ground connections). We may need to
take this case into account.

Cheers,
Orson


On 02/07/2018 02:32 PM, 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> 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.
>>>>
>>>>
>>>>
>>>>
>>>>     _______________________________________________
>>>>     Mailing list: https://launchpad.net/~kicad-developers
>>>>     <https://launchpad.net/~kicad-developers>
>>>>     Post to     : kicad-developers@xxxxxxxxxxxxxxxxxxx
>>>>     <mailto:kicad-developers@xxxxxxxxxxxxxxxxxxx>
>>>>     Unsubscribe : https://launchpad.net/~kicad-developers
>>>>     <https://launchpad.net/~kicad-developers>
>>>>     More help   : https://help.launchpad.net/ListHelp
>>>>     <https://help.launchpad.net/ListHelp>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Mailing list: https://launchpad.net/~kicad-developers
>>>> Post to     : kicad-developers@xxxxxxxxxxxxxxxxxxx
>>>> Unsubscribe : https://launchpad.net/~kicad-developers
>>>> More help   : https://help.launchpad.net/ListHelp
>>>>
>>>
>>> _______________________________________________
>>> Mailing list: https://launchpad.net/~kicad-developers
>>> Post to     : kicad-developers@xxxxxxxxxxxxxxxxxxx
>>> Unsubscribe : https://launchpad.net/~kicad-developers
>>> More help   : https://help.launchpad.net/ListHelp
>>>
>>
>>
>>
>> _______________________________________________
>> Mailing list: https://launchpad.net/~kicad-developers
>> Post to     : kicad-developers@xxxxxxxxxxxxxxxxxxx
>> Unsubscribe : https://launchpad.net/~kicad-developers
>> More help   : https://help.launchpad.net/ListHelp
>>
>>
>

Attachment: signature.asc
Description: OpenPGP digital signature