Re: gEDA-user: What is the logic in gnetlist/spice-sdb when to add a 'X' prefix to an identifier?

[al davis <ad151@xxxxxxxxxxxxxxxx>]

On Sunday 08 February 2009, Christoph Lechner wrote:
> Some of the diodes in the circuit are modelled by a SUBCKT,
> so I have to manually add a X prefix to these diode
> identifiers in the SPICE netlist (for example D101 => XD101)
> for the SPICE simulation to work. Because I hate this
> somewhat:
> How do I get spice-sdb to add the 'X' prefix automatically
> like it does for example for ICs? I'm using the file and
> model-name attributes to say what model to use.

How can it know?  You use a diode symbol, which is usually not a 
subckt.  What you see is the way Spice is.

I recommend that you add the X on the schematic.  Doesn't the 
netlister just pass the label through?

This is one of the reasons that those in the know are pressuring 
for a shift away from the Spice format.  If you use Gnucap with 
either Spectre or Verilog format, it doesn't care what the 
first letter is.  

Gnucap in Spice mode follows the Spice rules here, but I have 
been thinking of changing it to ignore the letter when the 
model name gives enough information to determine the type.  I 
don't know whether the change is a good idea or not.  It would 
not break anything.  It would just allow some that are now 
rejected as incorrect.




_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user