Re: gEDA-user: Gschem to PCB pin names to numbers

[Andy Peters <devel@xxxxxxxxx>]

On Jan 10, 2007, at 3:50 AM, Terry Barnaby wrote:

> Hi,
>
> I am trying my first board with Geda.
> I have entered a schematic including the symbols: nmos-3.sym and
> npn-1.sym. These symbols define the pinnumbers as G,S,D and B,E,C etc.
>
> I have set the footprint to TO220STAND. This footprint defines the  
> pinnumbers as 1,2,3.
>
> When I use gsch2pcb it generates a *.cmd file containing lines like
> ChangePinName(Q3, E, E)
> ChangePinName(Q3, C, C)
> ChangePinName(Q3, B, B)
>
> When I use: "ExecuteFile(motorControl.cmd)" within pcb I get error  
> messages like:
>
> "WARNING! Pin number ending with 'G' encountered in netlist file
> Probably a bad netlist file format
> Can't find XM3 pin G called for in netlist."
>
> So what's wrong ?
> 1. Should I change the gschem symbols to use pin numbers ?
> 2. Should I change PCB footprints to use pin names ?
> 3. Do I need a pinnumber to name translation file for gsch2pcb ?
> 4. Is there a problem with "gsch2pcb" ?

I ran into this. I made a symbol for an MMBT2222A based on the  
npn-1.sym in the default symbol library.  The original symbol calls  
out pin numbers as letters (E, B, C) and after processing with  
gsch2pcb and executing the command file, I got a similar complaint.

I assumed that there was some rule requiring non-BGA footprints to  
have numeric pin numbers and rather than futzing with it, I changed  
the symbol so that the pin numbers were indeed numbers instead of  
letters, and the problem went away.  (Another vote for heavy symbols.)

-a


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