xorn/src/backend/gnet_spice.py

   1 # gaf.netlist - gEDA Netlist Extraction and Generation
   2 # Copyright (C) 1998-2010 Ales Hvezda
   3 # Copyright (C) 1998-2010 gEDA Contributors (see ChangeLog for details)
   4 # Copyright (C) 2013-2020 Roland Lutz
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software Foundation,
  18 # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19
  20 # SPICE netlist backend written by S. Gieltjes
  21
  22 # Common functions for the `spice' and `spice-sdb' backends
  23 from spice_common import *
  24
  25 # write mos transistor
  26
  27 def write_mos_transistor(f, package):
  28     write_one_component(f, package)
  29     # create list of attributes which can be attached to a mosfet
  30     attrib_list = ['l', 'w', 'as', 'ad', 'pd', 'ps', 'nrd', 'nrs', 'temp', 'ic']
  31     write_list_of_attributes(f, package, attrib_list)
  32     # write the off attribute separately
  33     off_value = package.get_attribute('off', 'unknown')
  34     if off_value in ['#t', '1']:
  35         f.write(' off')
  36     f.write('\n')
  37
  38 # Include a file
  39
  40 def write_include(f, package):
  41     f.write('%s %s\n' % (package.refdes, component_value(package)))
  42
  43 # write the refdes, the net name connected to pin# and the
  44 # component value. No extra attributes.
  45
  46 def write_one_component(f, package):
  47     f.write(package.refdes + ' ')
  48     # write net names, slotted components not implemented
  49     write_net_names_on_component(f, package)
  50     # write component value, if components have a label "value=<hash>"
  51     # what if a component has no value label, currently unknown is written
  52     f.write(component_value(package))
  53
  54 # Spice netlist generation
  55
  56 def run(f, netlist):
  57     f.write('* Spice netlister for gnetlist\n')
  58     # search for specific device labels
  59     for package in reversed(netlist.packages):
  60         # write the refdes, to the pin# connected net and component
  61         # value and optional extra attributes
  62         # check if the component is a special spice component
  63         device = package.get_attribute('device', 'unknown')
  64         if device == 'SPICE-ccvs':
  65             write_ccvs(f, package)
  66         elif device == 'SPICE-cccs':
  67             write_cccs(f, package)
  68         elif device == 'SPICE-vcvs':
  69             write_vcvs(f, package)
  70         elif device == 'SPICE-vccs':
  71             write_vccs(f, package)
  72         elif device == 'SPICE-nullor':
  73             write_nullor(f, package)
  74         elif device == 'PMOS_TRANSISTOR':
  75             write_mos_transistor(f, package)
  76         elif device == 'NMOS_TRANSISTOR':
  77             write_mos_transistor(f, package)
  78         elif device == 'include':
  79             write_include(f, package)
  80         else:
  81             write_one_component(f, package)
  82             f.write('\n')
  83
  84     f.write('.END\n')