X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com X-TCPREMOTEIP: 207.224.51.38 X-Authenticated-UID: jpd AT noqsi DOT com From: John Doty Content-Type: multipart/alternative; boundary="Apple-Mail=_41C08F2C-4E6A-4AD8-8330-6415B4640A5C" Message-Id: Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Subject: Re: [geda-user] Parts with internally connected pins Date: Fri, 12 Jun 2015 10:04:19 -0600 References:

To: geda-user AT delorie DOT com In-Reply-To: X-Mailer: Apple Mail (2.1878.6) Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk --Apple-Mail=_41C08F2C-4E6A-4AD8-8330-6415B4640A5C Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On Jun 12, 2015, at 9:36 AM, Russell Nelson (russnelson AT gmail DOT com) = wrote: > The problem there is that you could have an "any pin" relationship (as = in your example), or an "all pins" relationship as in this example: the = 75441 quad H-bridge has four ground pins which are also heat sinks, and = which all should be connected to a nice fat ground plane. AFAIK, = gschem/pcb has no way to express that relationship. >=20 Since gschem supports attaching arbitrary attributes to symbols and = pins, and gnetlist can do pretty much anything you want with them, = geda-gaf is capable of supporting this desire. But the layout program = has to provide a way to express this in the netlist, and I am not aware = of one that does this. John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ jpd AT noqsi DOT com --Apple-Mail=_41C08F2C-4E6A-4AD8-8330-6415B4640A5C Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii

On Jun 12, 2015, at 9:36 AM, Russell = Nelson (russnelson AT gmail DOT com) = <geda-user AT delorie DOT com>= wrote:

The problem there is that you could have an "any pin" relationship = (as in your example), or an "all pins" relationship as in this example: = the 75441 quad H-bridge has four ground pins which are also heat sinks, = and which all should be connected to a nice fat ground plane. AFAIK, = gschem/pcb has no way to express that relationship.

Since = gschem supports attaching arbitrary attributes to symbols and pins, and = gnetlist can do pretty much anything you want with them, geda-gaf is = capable of supporting this desire. But the layout program has to provide = a way to express this in the netlist, and I am not aware of one that = does this.

John Doty Noqsi = Aerospace, Ltd.

http://www.noqsi.com/

jpd AT noqsi DOT com

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