Re: gEDA-user: Different slot types within on symbol
On Nov 22, 2010, at 12:10 AM, Oliver King-Smith wrote: Does the slot keyword do anything other than define the beginning of a slot? I have no idea what you mean by beginning of a slot. The slot= attribute selects a slotdef= attribute. The slotdef= attribute controls pin numbering, overriding pinnumber= attributes. That's all. John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ j...@noqsi.com ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Different slot types within on symbol
On Sun, 2010-11-21 at 23:10 -0800, Oliver King-Smith wrote: Peter, Different symbols for each slot is no problem. I will try that tomorrow. I was messing around with the slot=1 slot=2 trying to make things work and getting no where. Does the slot keyword do anything other than define the beginning of a slot? Oliver The attributes list here might be of help.. http://www.geda.seul.org/wiki/geda:master_attributes_list#numslots Note that each pin needs a valid pinseq. -- Peter Clifton Electrical Engineering Division, Engineering Department, University of Cambridge, 9, JJ Thomson Avenue, Cambridge CB3 0FA Tel: +44 (0)7729 980173 - (No signal in the lab!) Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me) ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Different slot types within on symbol
Oliver King-Smith wrote: Different symbols for each slot is no problem. The way geda defines the term slot, this does not work. A slot is the same symbol with a different set of pin numbers. People have even called geda slotting a general pinnumber renumber mechanism. Like Peter said, you can still split the power pins from the main symbol. If two symbols have the same refdes, gsch2pcb reads them as belonging to the same component. See opamp.sym and opamp_pwr.sym in my section of gedasymbols.org for an example. http://www.gedasymbols.org/user/kai_martin_knaak/ There is a catch, though: gsch2pcb takes attributes only from the first symbol of a set with the same refdes it encounters in the *.sch file. That is, the order the symbols were added in the GUI matters. In particular, this affects the footprint attribute. As a consequence the symbol might be missing in the layout. This is a known weakness. My last years effort to rectify it was rejected by the developers. As a work-around you can alternatively a) make sure to add the symbol with the footprint attribute first. b) add footprint symbols to all symbols of a set. c) open the *.sch file with a text editor and move the symbol that contains the footprint attribute to the top. d) write a script to do the above task automatically. Note, that renumber in gschem won't respect the sets of symbols with the same refdes. It assigns different numbers to them like it does with every other symbol. Feel free to provide patches. But note, that not every patch that works will be accepted. ---)kaimartin(--- -- Kai-Martin Knaak Öffentlicher PGP-Schlüssel: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x6C0B9F53 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Different slot types within on symbol
Is it possible to create a symbol with two types of slots. For example, in a 4 OR gates logic chip, one slot type would be the OR gate, while the other slot type would be the power connections. I see people typical wire the pins that are not part of a slot to nets, but that seems to hide them. I prefer to explicitly see the power on my chips so I can check the decoupling strategy. If you have any suggestions or examples please let me know. Thanks in advance Oliver ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Different slot types within on symbol
On Sun, 2010-11-21 at 16:52 -0800, Oliver King-Smith wrote: Is it possible to create a symbol with two types of slots. For example, in a 4 OR gates logic chip, one slot type would be the OR gate, while the other slot type would be the power connections. I see people typical wire the pins that are not part of a slot to nets, but that seems to hide them. I prefer to explicitly see the power on my chips so I can check the decoupling strategy. If you have any suggestions or examples please let me know. Thanks in advance Oliver Not exactly, but you can have multiple symbols all instantiated with the same refdes= to build up your part. You can have one symbol for the OR gate parts, another for the power. See for example 74power-1.sym in the library. That is a slightly bad example though, as all the 74* symbols in the library also have hidden net= attributes which wire up their power pins. The idea is solid though. Best regards, -- Peter Clifton Electrical Engineering Division, Engineering Department, University of Cambridge, 9, JJ Thomson Avenue, Cambridge CB3 0FA Tel: +44 (0)7729 980173 - (No signal in the lab!) Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me) ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Different slot types within on symbol
On Nov 21, 2010, at 7:30 PM, Peter Clifton wrote: That is a slightly bad example though, as all the 74* symbols in the library also have hidden net= attributes which wire up their power pins. The idea is solid though. Every tutorial on gEDA should state up front: LIBRARY SYMBOLS ARE ONLY STARTING POINTS. COPY AND CUSTOMIZE THEM TO FIT *YOUR* DESIGN FLOW AS NEEDED. So, if you want to use separate power symbols, copy the library symbols to your project's symbol repository, and delete the net= attributes. That the symbol browser doesn't copy the symbol to a project repository by default (assuming that this is defined in gafrc) is a problem. It perpetuates the illusion that the library is universal to all flows, and that such a library is possible. On the other hand, ONCE YOU HAVE MADE THE PROJECT LOCAL COPY, Hierarchy-Down Symbol is very useful. John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ j...@noqsi.com ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Different slot types within on symbol
Peter, Different symbols for each slot is no problem. I will try that tomorrow. I was messing around with the slot=1 slot=2 trying to make things work and getting no where. Does the slot keyword do anything other than define the beginning of a slot? Oliver __ From: Peter Clifton pc...@cam.ac.uk To: gEDA user mailing list geda-user@moria.seul.org Sent: Sun, November 21, 2010 6:30:27 PM Subject: Re: gEDA-user: Different slot types within on symbol On Sun, 2010-11-21 at 16:52 -0800, Oliver King-Smith wrote: Is it possible to create a symbol with two types of slots. For example, in a 4 OR gates logic chip, one slot type would be the OR gate, while the other slot type would be the power connections. I see people typical wire the pins that are not part of a slot to nets, but that seems to hide them. I prefer to explicitly see the power on my chips so I can check the decoupling strategy. If you have any suggestions or examples please let me know. Thanks in advance Oliver Not exactly, but you can have multiple symbols all instantiated with the same refdes= to build up your part. You can have one symbol for the OR gate parts, another for the power. See for example 74power-1.sym in the library. That is a slightly bad example though, as all the 74* symbols in the library also have hidden net= attributes which wire up their power pins. The idea is solid though. Best regards, -- Peter Clifton Electrical Engineering Division, Engineering Department, University of Cambridge, 9, JJ Thomson Avenue, Cambridge CB3 0FA Tel: +44 (0)7729 980173 - (No signal in the lab!) Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me) ___ geda-user mailing list [1]geda-u...@moria.seul.org [2]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user References 1. mailto:geda-user@moria.seul.org 2. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
