kicad-developers team mailing list archive

["Frank Bennett" <bennett78@...>]

--- In kicad-devel@xxxxxxxxxxxxxxx, jean-pierre charras - INPG
<jean-pierre.charras@...> wrote:
>
> Frank Bennett a �crit :
> >
> > I posted a Test.sh shar script containing a EEscheme
> > test schematic, pro, lib and net file . The Test.sch file
> > contains an instance:
> >
> > $Comp
> > L R R3
> > U 1 1 00000000
> > P 3400 3400
> > F 0 "R3" H 3600 3400 90 0000 L T
> > F 1 "30K" H 3600 3500 90 0000 L T
> > X 1 3400 3400
> > X 1 0 0 -1
> > $EndComp
> >
> > Yet the schematic display shows 30K on Top of R3
> > R3 @(3600, 3300) Left Top
> > 30K @(3600, 3400) Left Top
> >
> > What's going on?
> >
> I tested this and found:
> R3 @(3600, 3400) Left Top
> 30K @(3600, 3300) Left Top
> 
> This is one of some oddities of eeschema.
> For components, some coordinates use the standart Y axis orientation 
> (from bottom to top).
> For field location, eeschema calculates the relative position for 30K 
> (F1) field dy = 3500 - 3400 = 100 mils
> But screen uses reverse Y axis orientation (from top to bottom), and
the 
> screen pos is 3400 + (-100) = 3300 mils
> this is due to the eeschema history.

jean-pierre:

I am generating library parts and schematic instances for
Edif2kicad. Where in the code or method I can use to produce 
predictable coordinates for the reference and values given 
the symbol position? Using the page orgin (upper left) 
appears that a more negative y coordinate doesn't always mean 
farther down the schematic page!

Frank
> >
> > Also the net file does not show the GND in the net part
> > of the file. Pcbnew must use the component part of the
> > Netlist file since the footprint info is there. The nets
> > part of the file is probably redundant info that is not
> > used?
> >
> > thanks,
> > Frank
> >
> >
> The GND is not really a net because there is only one pin connected
(and 
> obviously a net must have more one pin to create a connection)
> So the so-called GND is removed from the list of nets.
> 
> This list is not used by Pcbnew and it is for info only.
> 
> 
> -- 
> Jean-Pierre CHARRAS
> Ma�tre de conf�rences
> Directeur d'�tudes 2ieme ann�e.
> G�nie Electrique et Informatique Industrielle 2
> Institut Universitaire de Technologie 1 de Grenoble
> BP 67, 38402 St Martin d'Heres Cedex
> 
> Recherche :
> Grenoble Image Parole Signal Automatique (GIPSA - INPG)
> 46, Avenue F�lix Viallet
> 38031 Grenoble Cedex
>