def _autoset_Cff(self):
cff_dev = self.get_elem_by_idx('CFF').data['device']
cff_fp = self.get_elem_by_idx('CFF').data['footprint']
Zfb = self.RFB1 * (self.RFB2 / (self.RFB1 + self.RFB2))
self.target_cff = Capacitance(
(self.Vout / self.Vin_min) / (self.Fsw.value * Zfb.value)
)
allowed_cff_vals = iec60063.gen_vals(self._configdict['Cseries'],
iec60063.cap_ostrs,
self._configdict['Cmin'],
self._configdict['Cmax'])
best_match = None
for c in allowed_cff_vals:
err = abs(self.target_cff - Capacitance(c))
if best_match is None or err < best_match[0]:
best_match = (err, c)
cff = gsymlib.find_capacitor(best_match[1], cff_fp, cff_dev)
self.get_elem_by_idx('CFF').data['value'] = cff.value
def jb_harmonize(item):
ident = ident_transform(item.data['device'], item.data['value'],
item.data['footprint'])
prefix = check_for_std_val(ident)
if not prefix:
return item
else:
if item.data['footprint'].startswith('MY-'):
item.data['footprint'] = item.data['footprint'][3:]
context = {
'device': item.data['device'],
'footprint': item.data['footprint']
}
if prefix == 'RES':
params = parse_resistor(item.data['value'], context)
from tendril.gedaif.gsymlib import find_resistor
from tendril.gedaif.gsymlib import NoGedaSymbolException
try:
resistor = find_resistor(item.data['device'],
item.data['footprint'],
**params._asdict())
item.data['value'] = resistor.value
except NoGedaSymbolException:
pass
return item
elif prefix == 'CAP':
params = parse_capacitor(item.data['value'], context)
from tendril.gedaif.gsymlib import find_capacitor
from tendril.gedaif.gsymlib import NoGedaSymbolException
try:
capacitor = find_capacitor(item.data['device'],
item.data['footprint'],
**params._asdict())
item.data['value'] = capacitor.value
except NoGedaSymbolException:
pass
return item
else:
return item
def Fc(self, value):
c1_dev = self.get_elem_by_idx('C1').data['device']
c1_fp = self.get_elem_by_idx('C1').data['footprint']
if c1_fp[0:3] == "MY-":
c1_fp = c1_fp[3:]
allowed_cap_vals = iec60063.gen_vals(self._configdict['Cseries'],
iec60063.cap_ostrs,
self._configdict['Cmin'],
self._configdict['Cmax'])
required_cap_val = 1 / (2 * pi * float(self.R1) * value)
cval = None
for val in allowed_cap_vals:
lastval = cval
cval = electronics.parse_capacitance(val)
if cval >= required_cap_val:
self.get_elem_by_idx('C1').data['value'] = gsymlib.find_capacitor(lastval, c1_fp, c1_dev).value # noqa
break
if cval is None:
raise ValueError
def get_symbol(self, value, device=None, footprint=None):
from tendril.gedaif import gsymlib
if device is None:
device = self._device
if footprint is None:
footprint = self._footprint
if self._stype == 'resistor':
if isinstance(value, (str, Resistance)):
try:
return gsymlib.find_resistor(value, footprint, device)
except (gsymlib.NoGedaSymbolException, InvalidOperation):
pass
if self._stype == 'capacitor':
if isinstance(value, (str, Capacitance)):
try:
return gsymlib.find_capacitor(value, footprint, device)
except (gsymlib.NoGedaSymbolException, InvalidOperation):
pass
ident = electronics.ident_transform(device, value, footprint)
return gsymlib.get_symbol(ident)
def get_symbol(self, value, device=None, footprint=None):
from tendril.gedaif import gsymlib
if device is None:
device = self._device
if footprint is None:
footprint = self._footprint
# TODO Handle other parameters such as wattage, voltage
if self._stype == 'resistor':
if isinstance(value, (str, Resistance)):
try:
return gsymlib.find_resistor(device, footprint, value)
except (gsymlib.NoGedaSymbolException, InvalidOperation):
pass
if self._stype == 'capacitor':
if isinstance(value, (str, Capacitance)):
try:
return gsymlib.find_capacitor(device, footprint, value)
except (gsymlib.NoGedaSymbolException, InvalidOperation):
pass
ident = electronics.ident_transform(device, value, footprint)
return gsymlib.get_symbol(ident)
