def __init__(self,
simulator='ngspice',
verbose=True,
netlist_path=None,
sky130lib=None):
'''
Instantiate the object
'''
if sky130lib is None:
self.sky130lib = os.environ.get('SKY130LIB', 'sky130_fd_pr')
else:
self.sky130lib = sky130lib
# store the setup information internally
self.config = {}
self.simulation = {}
self.config['simulator'] = {'executable': simulator, 'shared': False}
self.config['verbose'] = verbose
# create an ngspice shared object
self.ngspice = NgSpiceShared.new_instance()
# if provided read in the base netlist
if netlist_path:
self.read_netlist_file(netlist_path)
self.plot_init = False
# define some limits
self.limits = {'phase_margin': 45, 'gain_margin': 10}
def __init__(self, verbose=True, netlist_path=None, pdk_path=None):
'''
Instantiate the object
'''
self.config = {}
self.config['simulator'] = {
'executable': 'ngspice',
# 'shared' : True,
'shared': False,
'silent': False
}
self.config['verbose'] = verbose
# create an ngspice shared object
self.ngspice = NgSpiceShared.new_instance()
import PySpice.Logging.Logging as Logging
logger = Logging.setup_logging()
from PySpice.Spice.NgSpice.Shared import NgSpiceShared
ngspice = NgSpiceShared.new_instance()
# print(ngspice.exec_command('version -f'))
# print(ngspice.exec_command('print all'))
# print(ngspice.exec_command('devhelp'))
# print(ngspice.exec_command('devhelp resistor'))
circuit = '''
.title Voltage Multiplier
.SUBCKT 1N4148 1 2
*
R1 1 2 5.827E+9
D1 1 2 1N4148
*
.MODEL 1N4148 D
+ IS = 4.352E-9
+ N = 1.906
+ BV = 110
+ IBV = 0.0001
+ RS = 0.6458
+ CJO = 7.048E-13
+ VJ = 0.869
+ M = 0.03
+ FC = 0.5
+ TT = 3.48E-9
def check_installation(self):
"""Tool to check PySpice is correctly installed.
"""
import ctypes.util
print('OS:', sys.platform)
print()
print('Environments:')
for _ in (
'PATH',
'LD_LIBRARY_PATH',
'PYTHONPATH',
'NGSPICE_LIBRARY_PATH',
'SPICE_LIB_DIR',
'SPICE_EXEC_DIR',
'SPICE_ASCIIRAWFILE',
'SPICE_SCRIPTS',
'NGSPICE_MEAS_PRECISION',
'SPICE_NO_DATASEG_CHECK',
'NGSPICE_INPUT_DIR',
):
print(_, os.environ.get(_, 'undefined'))
print()
if 'VIRTUAL_ENV' in os.environ:
print('On Virtual Environment:')
for _ in ('VIRTUAL_ENV', ):
print(_, os.environ.get(_, 'undefined'))
print()
if 'CONDA_PREFIX' in os.environ:
print('On Anaconda:')
for _ in (
# not specific
'CONDA_EXE',
'CONDA_PYTHON_EXE',
# 'CONDA_SHLVL', # shell level, 1 in conda else 0
# '_CE_CONDA', # empty
# specific
'CONDA_DEFAULT_ENV',
'CONDA_PREFIX',
# 'CONDA_PROMPT_MODIFIER',
):
print(_, os.environ.get(_, 'undefined'))
print()
try:
print('Load PySpice module')
import PySpice
print('loaded {} version {}'.format(PySpice.__file__,
PySpice.__version__))
print()
except ModuleNotFoundError:
print('PySpice module not found')
return
import PySpice.Logging.Logging as Logging
logger = Logging.setup_logging(logging_level='INFO')
from PySpice.Config import ConfigInstall
from PySpice.Spice import NgSpice
from PySpice.Spice.NgSpice import NGSPICE_SUPPORTED_VERSION
from PySpice.Spice.NgSpice.Shared import NgSpiceShared
print('ngspice supported version:', NGSPICE_SUPPORTED_VERSION)
print()
##############################################
message = os.linesep.join((
'NgSpiceShared configuration is',
' NgSpiceShared.NGSPICE_PATH = {0.NGSPICE_PATH}',
' NgSpiceShared.LIBRARY_PATH = {0.LIBRARY_PATH}',
))
print(message.format(NgSpiceShared))
print()
##############################################
cwd = Path(os.curdir).resolve()
print('Working directory:', cwd)
print()
locale_ngspice = cwd.joinpath(
'ngspice-{}'.format(NGSPICE_SUPPORTED_VERSION))
if locale_ngspice.exists() and locale_ngspice.is_dir():
print('Found local ngspice:')
for root, _, filenames in os.walk(locale_ngspice,
followlinks=True):
for filename in filenames:
print(root, filename)
print()
ngspice_module_path = Path(NgSpice.__file__).parent
print('NgSpice:', ngspice_module_path)
for root, _, filenames in os.walk(ngspice_module_path):
for filename in filenames:
print(root, filename)
print()
##############################################
if ConfigInstall.OS.on_windows:
print('OS is Windows')
library = NgSpiceShared.LIBRARY_PATH
elif ConfigInstall.OS.on_osx:
print('OS is OSX')
library = 'ngspice'
elif ConfigInstall.OS.on_linux:
print('OS is Linux')
library = 'ngspice'
else:
raise NotImplementedError
library_path = ctypes.util.find_library(library)
print('Found in library search path: {}'.format(library_path))
##############################################
print('\nLoad NgSpiceShared')
ngspice = NgSpiceShared.new_instance(verbose=True)
if ConfigInstall.OS.on_linux:
# For Linux see DLOPEN(3)
# Apparently there is no simple way to get the path of the loaded library ...
# But we can look in the process maps
pid = os.getpid()
maps_path = '/proc/{}/maps'.format(pid)
with open(maps_path) as fh:
for line in fh:
if '.so' in line and 'ngspice' in line:
parts = [x for x in line.split() if x]
path = parts[-1]
print('loaded {}'.format(path))
break
print()
if ngspice.spinit_not_found:
print('WARNING: spinit was not found')
print()
message = os.linesep.join((
'Ngspice version is {0.ngspice_version}',
' has xspice: {0.has_xspice}',
' has cider {0.has_cider}',
))
print(message.format(ngspice))
print()
command = 'version -f'
print('> ' + command)
print(ngspice.exec_command(command))
print()
circuit_test = CircuitTest()
circuit_test.test_spinit()
print('PySpice should work as expected')
def check_installation(self):
"""Tool to check PySpice is correctly installed.
"""
import ctypes.util
try:
print('Load PySpice module')
import PySpice
print('loaded {} version {}'.format(PySpice.__file__,
PySpice.__version__))
except ModuleNotFoundError:
print('PySpice module not found')
return
import PySpice.Logging.Logging as Logging
logger = Logging.setup_logging(logging_level='INFO')
from PySpice.Config import ConfigInstall
from PySpice.Spice.NgSpice.Shared import NgSpiceShared
##############################################
message = '''
NgSpiceShared configuration is
NgSpiceShared.NGSPICE_PATH = {0.NGSPICE_PATH}
NgSpiceShared.LIBRARY_PATH = {0.LIBRARY_PATH}
'''
print(message.format(NgSpiceShared))
##############################################
if ConfigInstall.OS.on_windows:
print('OS is Windows')
library = NgSpiceShared.LIBRARY_PATH
elif ConfigInstall.OS.on_osx:
print('OS is OSX')
library = 'ngspice'
elif ConfigInstall.OS.on_linux:
print('OS is Linux')
library = 'ngspice'
else:
raise NotImplementedError
library_path = ctypes.util.find_library(library)
print('Found in library search path: {}'.format(library_path))
##############################################
print('\nLoad NgSpiceShared')
ngspice = NgSpiceShared(verbose=True)
if ConfigInstall.OS.on_linux:
# For Linux see DLOPEN(3)
# Apparently there is no simple way to get the path of the loaded library ...
# But we can look in the process maps
pid = os.getpid()
maps_path = '/proc/{}/maps'.format(pid)
with open(maps_path) as fh:
for line in fh:
if '.so' in line and 'ngspice' in line:
parts = [x for x in line.split() if x]
path = parts[-1]
print('loaded {}'.format(path))
break
message = '''
Ngspice version is {0.ngspice_version}
has xspice: {0.has_xspice}
has cider {0.has_cider}
'''
print(message.format(ngspice))
command = 'version -f'
print('> ' + command)
print(ngspice.exec_command(command))
print()
print('PySpice should work as expected')
#r#
#r# This example explains how to use the NgSpice binding.
#r#
####################################################################################################
import PySpice.Logging.Logging as Logging
logger = Logging.setup_logging()
####################################################################################################
from PySpice.Spice.NgSpice.Shared import NgSpiceShared
####################################################################################################
ngspice = NgSpiceShared.new_instance()
print(ngspice.exec_command('version -f'))
print(ngspice.exec_command('print all'))
print(ngspice.exec_command('devhelp'))
print(ngspice.exec_command('devhelp resistor'))
circuit = '''
.title Voltage Multiplier
.SUBCKT 1N4148 1 2
*
R1 1 2 5.827E+9
D1 1 2 1N4148
*
.MODEL 1N4148 D