kicad-developers team mailing list archive

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

I've been working with EDIF from OrCad and been running into different
power netnames cellrefing the same library symbol. The EEscheme
netlister looks for pin properties: PIN_POWER_IN, PINNOTDRAW 
I discovered by code review that currently each power net 
requires a separate library symbol be defined, optionaly a net 
label could be used. I propose we lack this requirement and pick 
up the pin name from the VALUE set in the component instance:

library def:
#
# VCC
#
DEF VCC #PWR 0 30 Y Y 1 0 N
F0 "#PWR" 0 0 50 H V
F1 "VCC" 0 0 50 H V
DRAW
X VCC 1 100 -100 0 U 49 49 1 1 W N
C 100 -30 60 0 1 0
P 2 0 1 0 100 -100 100 -60
ENDDRAW
ENDDEF

sch instance:
$Comp
L VCC #PWR1
U 1 1 47CC47B2
P 2700 1700
F 0 "#PWR1" H 2550 1800 50 0000 C C
F 1 "+5V" H 2600 1700 50 0000 C C
1 2700 1700
1 0 0 -1
$EndComp

The following contains test1.sch with netlist after modifing
eeschema/netlist.cpp
http://f1.grp.yahoofs.com/v1/MLvMR_5W5uM3T92gPDctMngqgZAd3PUEz6CRmc9pcu3QVdMkmQFTIUyBfRifGtXKbn8Ah7JSY1S1MIztxtu3f89JUTYsHS2pb_9PKg/powerNet1.sh

This change seems to be backward compatible with existing schematics/
netlists using the previous scheme. Here is the context diff:

*** netlist.cpp.orig 2008-03-03 16:17:18.000000000 -0700
--- netlist.cpp 2008-03-03 19:44:01.000000000 -0700
***************
*** 630,636 ****
ObjNet[NbrItem].m_Comp = NULL;
ObjNet[NbrItem].m_SheetList = *sheetlist;
ObjNet[NbrItem].m_Type = NET_PINLABEL;
! ObjNet[NbrItem].m_Label = &Pin->m_PinName;
ObjNet[NbrItem].m_Start.x = x2;
ObjNet[NbrItem].m_Start.y = y2;
ObjNet[NbrItem].m_End =
ObjNet[NbrItem].m_Start;
--- 630,636 ----
ObjNet[NbrItem].m_Comp = NULL;
ObjNet[NbrItem].m_SheetList = *sheetlist;
ObjNet[NbrItem].m_Type = NET_PINLABEL;
! ObjNet[NbrItem].m_Label =
&DrawLibItem->m_Field[VALUE].m_Text; // fwb
ObjNet[NbrItem].m_Start.x = x2;
ObjNet[NbrItem].m_Start.y = y2;
ObjNet[NbrItem].m_End =
ObjNet[NbrItem].m_Start;


Comments?
Frank