gEDA-user: Power rail net clarification
Hello, I just want to make sure I understand this correctly. When I instantiate a power rail, there is an inherited attribute called net with a default value of VCC:1, which I cannot change. My understanding is that if I add my own net attribute, say net=VCC:3V, that attribute will override the inherited one. I will not have this power rail connected to both the VCC:1 net and the VCC:3V net, only the VCC:3V net. Is this correct? Thanks, --Nikos Arechiga ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Power rail net clarification
Hello Nikos, The net attribute inside a symbol has the form net=signalname:pinname,pinname,pinname Please also see: http://www.geda.seul.org/wiki/geda:na_howto In your case pin 1 and pin 3V are both connected to VCC. So probably you want something like net=3V:1 or net=3V:pwr If you instantiate a power rail you can double click on this symbol and you will get the attribute dialogue window. In this window you click the Show inherited attributes box. Now you should see the net attribute. right click on the net attribute and select promote. Now you should have two attributes, the promoted one you can edit and will prevail over the old one. I hope this helps. Regards, Robert. Hello, I just want to make sure I understand this correctly. When I instantiate a power rail, there is an inherited attribute called net with a default value of VCC:1, which I cannot change. My understanding is that if I add my own net attribute, say net=VCC:3V, that attribute will override the inherited one. I will not have this power rail connected to both the VCC:1 net and the VCC:3V net, only the VCC:3V net. Is this correct? Thanks, --Nikos Arechiga ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Power rail net clarification
Hi Nikos, I am new to gEDA(working on my first project for some months so far) and had similar doubts(solved) some time ago. On Sat, 2010-06-19 at 08:42 -0600, Nikos Arechiga wrote: Hello, I just want to make sure I understand this correctly. When I instantiate a power rail, there is an inherited attribute called net with a default value of VCC:1, which I cannot change. This inherited attribute gets promoted to the schematic when you add the symbol, and you can edit it to your needs. My understanding is that if I add my own net attribute, say net=VCC:3V Is this correct? I see a misunderstanding here. I had the same error at the beggining. The net attribute has the syntax: NET_NAME:PIN_NUMBER_ASSOCIATED. So, in net=Vcc:1, NET_NAME = Vcc and PIN_NUMBER_ASSOCIATED = 1. The correct way would be something like net=VCC3V:1. Note the : character has a special meaning in net attributes, so you cannot use it as part of the identification of the net. Best Regards, Felipe. PS: Since I made the mistake on lot of nets before realizing the error and found unnecessary to explicitly write the pinnumber associated with a net in symbols with only one pin, I made a patch for gnetlist to assume an implicit :1 suffix on nets with names lacking the pinnumber part(so you can have net=VCC3V instead of net=VCC3V:1) but you will have to apply the patch to your local copy of the code and recompile gnetlist if you want to try it out. -- Felipe De la Puente Christen Mobile Phone: +56 9 93199807 MSN/GTalk : fdelapue...@gmail.com ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Power rail net clarification
Thank you! On Sat, Jun 19, 2010 at 1:21 PM, Felipe De la Puente Christen [1]fdelapue...@gmail.com wrote: Hi Nikos, I am new to gEDA(working on my first project for some months so far) and had similar doubts(solved) some time ago. On Sat, 2010-06-19 at 08:42 -0600, Nikos Arechiga wrote: Hello, I just want to make sure I understand this correctly. When I instantiate a power rail, there is an inherited attribute called net with a default value of VCC:1, which I cannot change. This inherited attribute gets promoted to the schematic when you add the symbol, and you can edit it to your needs. My understanding is that if I add my own net attribute, say net=VCC:3V Is this correct? I see a misunderstanding here. I had the same error at the beggining. The net attribute has the syntax: NET_NAME:PIN_NUMBER_ASSOCIATED. So, in net=Vcc:1, NET_NAME = Vcc and PIN_NUMBER_ASSOCIATED = 1. The correct way would be something like net=VCC3V:1. Note the : character has a special meaning in net attributes, so you cannot use it as part of the identification of the net. Best Regards, Felipe. PS: Since I made the mistake on lot of nets before realizing the error and found unnecessary to explicitly write the pinnumber associated with a net in symbols with only one pin, I made a patch for gnetlist to assume an implicit :1 suffix on nets with names lacking the pinnumber part(so you can have net=VCC3V instead of net=VCC3V:1) but you will have to apply the patch to your local copy of the code and recompile gnetlist if you want to try it out. -- Felipe De la Puente Christen Mobile Phone: +56 9 93199807 MSN/GTalk : [2]fdelapue...@gmail.com ___ geda-user mailing list [3]geda-u...@moria.seul.org [4]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user References 1. mailto:fdelapue...@gmail.com 2. mailto:fdelapue...@gmail.com 3. mailto:geda-user@moria.seul.org 4. 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
