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# Copyright (C) 2015 Chintalagiri Shashank 

# 

# This file is part of Tendril. 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU Affero General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 

# GNU Affero General Public License for more details. 

# 

# You should have received a copy of the GNU Affero General Public License 

# along with this program.  If not, see <http://www.gnu.org/licenses/>. 

""" 

This file is part of tendril 

See the COPYING, README, and INSTALL files for more information 

 

This file needs to be refactored quite a bit 

""" 

 

from math import pi 

 

import iec60063 

 

from tendril.conventions import electronics 

from tendril.conventions.motifs.motifbase import MotifBase 

from tendril.gedaif import gsymlib 

 

from tendril.utils import log 

logger = log.get_logger(__name__, log.DEFAULT) 

 

 

class MotifDLPF1(MotifBase): 

    def __init__(self, identifier): 

        super(MotifDLPF1, self).__init__(identifier) 

        self._configdict = None 

 

    def configure(self, configdict): 

        # Set Resistances 

        self.get_elem_by_idx('R1').data['value'] = electronics.construct_resistor(configdict['R1'], '0.125W')  # noqa 

        self.get_elem_by_idx('R2').data['value'] = electronics.construct_resistor(configdict['R1'], '0.125W')  # noqa 

        # Set Frequency 

        self._configdict = configdict 

        self.Fdiff = float(configdict['Fdiff'][:-2]) 

        self._set_biases() 

        self.validate() 

 

    def _set_biases(self): 

        if 'pbias' not in self._configdict.keys(): 

            log.WARNING('Positive terminal bias not defined : ' + self.refdes) 

        else: 

            if self._configdict['pbias'] != '-1': 

                self.get_elem_by_idx('R3').data['value'] = electronics.construct_resistor(self._configdict['pbias'], '0.125W')  # noqa 

            else: 

                try: 

                    self.get_elem_by_idx('R3').data['fillstatus'] = 'DNP' 

                except KeyError: 

                    pass 

 

        if 'pbias' not in self._configdict.keys(): 

            log.WARNING('Positive terminal bias not defined : ' + self.refdes) 

        else: 

            if self._configdict['nbias'] != '-1': 

                self.get_elem_by_idx('R4').data['value'] = electronics.construct_resistor(self._configdict['nbias'], '0.125W')  # noqa 

            else: 

                try: 

                    self.get_elem_by_idx('R4').data['fillstatus'] = 'DNP' 

                except KeyError: 

                    pass 

 

    @property 

    def Fdiff(self): 

        return (10 ** 9) / (2 * pi * float(self.R1) * float(2 * self.C1 + self.C2))  # noqa 

 

    @property 

    def Fcm(self): 

        return (10 ** 9) / (2 * pi * float(self.R1) * float(self.C2)) 

 

    @Fdiff.setter 

    def Fdiff(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']) 

 

        fcm_est = value * 21 

        required_cap_val = (10 ** 9) / (2 * pi * float(self.R1) * fcm_est) 

 

        cval = None 

        lastval = None 

        for val in allowed_cap_vals: 

            lastval = cval 

            cval = electronics.parse_capacitance(val) 

            if cval >= required_cap_val: 

                self.get_elem_by_idx('C2').data['value'] = gsymlib.find_capacitor(lastval, c1_fp, c1_dev).value  # noqa 

                self.get_elem_by_idx('C3').data['value'] = gsymlib.find_capacitor(lastval, c1_fp, c1_dev).value  # noqa 

                break 

 

        if cval is None: 

            raise ValueError 

 

        required_cap_val = lastval * 10 

        for val in allowed_cap_vals: 

            cval = electronics.parse_capacitance(val) 

            if cval >= required_cap_val: 

                self.get_elem_by_idx('C1').data['value'] = gsymlib.find_capacitor(cval, c1_fp, c1_dev).value  # noqa 

                break 

 

    @property 

    def R1(self): 

        elem = self.get_elem_by_idx('R1') 

        assert elem.data['device'] in ['RES SMD', 'RES THRU'] 

        return electronics.parse_resistance(electronics.parse_resistor(elem.data['value'])[0])  # noqa 

 

    @property 

    def R2(self): 

        elem = self.get_elem_by_idx('R2') 

        assert elem.data['device'] in ['RES SMD', 'RES THRU'] 

        return electronics.parse_resistance(electronics.parse_resistor(elem.data['value'])[0])  # noqa 

 

    @property 

    def C1(self): 

        elem = self.get_elem_by_idx('C1') 

        assert elem.data['device'] in ['CAP CER SMD', 'CAP CER THRU'] 

        return electronics.parse_capacitance(electronics.parse_capacitor(elem.data['value'])[0])  # noqa 

 

    @property 

    def C2(self): 

        elem = self.get_elem_by_idx('C2') 

        assert elem.data['device'] in ['CAP CER SMD', 'CAP CER THRU'] 

        return electronics.parse_capacitance(electronics.parse_capacitor(elem.data['value'])[0])  # noqa 

 

    @property 

    def C3(self): 

        elem = self.get_elem_by_idx('C3') 

        assert elem.data['device'] in ['CAP CER SMD', 'CAP CER THRU'] 

        return electronics.parse_capacitance(electronics.parse_capacitor(elem.data['value'])[0])  # noqa 

 

    def validate(self): 

        logger.debug("Validating Motif : " + self.refdes) 

        logger.debug('R1 : ' + str(self.R1)) 

        logger.debug('R2 : ' + str(self.R2)) 

        logger.debug('C1 : ' + str(self.C1)) 

        logger.debug('C2 : ' + str(self.C2)) 

        logger.debug('C3 : ' + str(self.C3)) 

        logger.debug('Fdiff : ' + str(self.Fdiff)) 

        logger.debug('Fcm : ' + str(self.Fcm)) 

        assert self.R1 == self.R2 

        assert self.C3 == self.C2 

        assert self.C1 >= 10 * self.C2 

 

    def get_configdict_stub(self): 

        stub = {'desc': "Differential Low Pass RFI and AAF filter", 

                'Fdiff': "15000Hz", 

                'R1': "50E", 

                'Cseries': "E6", 'Cmin': "1pF", 'Cmax': "1uF", 

                'pbias': '-1', 'nbias': '-1'} 

        return stub