CHIRP

# Copyright 2022 Jim Unroe <rock.unroe@gmail.com>

#

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

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

# the Free Software Foundation, either version 2 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 General Public License for more details.

#

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

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

import struct

import logging

from chirp import chirp_common, directory, memmap

from chirp import bitwise, errors, util

from chirp import bandplan_na

from chirp.settings import RadioSetting, RadioSettingGroup, \

    RadioSettingValueInteger, RadioSettingValueList, \

    RadioSettingValueBoolean, RadioSettings

LOG = logging.getLogger(__name__)

MEM_FORMAT = """

struct memory {

  u32 rxfreq;                                // 00-03

  u16 decQT;                                 // 04-05

  u32 txfreq;                                // 06-09

  u16 encQT;                                 // 0a-0b

  u8 lowpower:1,  // Power Level             // 0c

     unknown1:1,

     isnarrow:1,  // Bandwidth

     bcl:2,       // Busy Channel Lockout

     scan:1,      // Scan Add

     encode:1,    // Encode

     isunused:1;  // Is Unused

  u8 unknown3[3];                            // 0d-0f

};

#seekto 0x0170;

struct memory channels[99];

#seekto 0x0162;

struct {

  u8 unknown_1:1,           // 0x0162

     voice:2,               //               Voice Prompt

     beep:1,                //               Beep Switch

     unknown_2:1,

     vox:1,                 //               VOX

     autolock:1,            //               Auto Lock

     vibrate:1;             //               Vibrate Switch

  u8 squelch:4,             // 0x0163        SQ Level

     unknown_3:1,

     volume:3;              //               Volume Level

  u8 voxl:4,                // 0x0164        VOX Level

     voxd:4;                //               VOX Delay

  u8 unknown_5:1,           // 0x0165

     save:3,                //               Power Save

     calltone:4;            //               Call Tone

  u8 unknown_6:4,           // 0x0166

     roger:2,               //               Roger Tone

     backlight:2;           //               Backlight Set

  u16 tot;                  // 0x0167-0x0168 Time-out Timer

  u8 unknown_7[3];          // 0x0169-0x016B

  u8 skeyul;                // 0x016C        Side Key Up Long

  u8 skeyus;                // 0x016D        Side Key Up Short

  u8 skeydl;                // 0x016E        Side Key Down Long

  u8 skeyds;                // 0x016F        Side Key Down Short

} settings;

"""

CMD_ACK = b"\x06"

RB15_DTCS = tuple(sorted(chirp_common.DTCS_CODES + (645,)))

LIST_BACKLIGHT = ["Off", "On", "Auto"]

LIST_BCL = ["None", "Carrier", "QT/DQT Match"]

LIST_ROGER = ["Off", "Start", "End", "Start and End"]

LIST_SAVE = ["Off", "1:1", "1:2", "1:3", "1:4", "1:5"]

_STEP_LIST = [2.5, 5., 6.25, 10., 12.5, 20., 25., 50.]

LIST_VOICE = ["Off", "Chinese", "English"]

LIST_VOXD = ["0.0", "0.5", "1.0", "1.5", "2.0", "2.5", "3.0", "3.5", "4.0",

             "4.5", "5.0S"]

SKEY_CHOICES = ["None", "Scan", "Monitor", "VOX On/Off",

                "Local Alarm", "Remote Alarm", "Backlight On/Off", "Call Tone"]

SKEY_VALUES = [0x00, 0x01, 0x03, 0x04, 0x09, 0x0A, 0x13, 0x14]

TOT_CHOICES = ["Off", "15", "30", "45", "60", "75", "90", "105", "120",

               "135", "150", "165", "180", "195", "210", "225", "240",

               "255", "270", "285", "300", "315", "330", "345", "360",

               "375", "390", "405", "420", "435", "450", "465", "480",

               "495", "510", "525", "540", "555", "570", "585", "600"

               ]

TOT_VALUES = [0x00, 0x0F, 0x1E, 0x2D, 0x3C, 0x4B, 0x5A, 0x69, 0x78,

              0x87, 0x96, 0xA5, 0xB4, 0xC3, 0xD2, 0xE1, 0xF0,

              0xFF, 0x10E, 0x11D, 0x12C, 0x13B, 0x14A, 0x159, 0x168,

              0x177, 0x186, 0x195, 0x1A4, 0x1B3, 0x1C2, 0x1D1, 0x1E0,

              0x1EF, 0x1FE, 0x20D, 0x21C, 0x22B, 0x23A, 0x249, 0x258

              ]

def _checksum(data):

    cs = 0

    for byte in data:

        cs += byte

    return cs % 256

def tone2short(t):

    """Convert a string tone or DCS to an encoded u16

    """

    tone = str(t)

    if tone == "----":

        u16tone = 0x0000

    elif tone[0] == 'D':  # This is a DCS code

        c = tone[1: -1]

        code = int(c, 8)

        if tone[-1] == 'I':

            code |= 0x4000

        u16tone = code | 0x8000

    else:  # This is an analog CTCSS

        u16tone = int(tone[0:-2]+tone[-1]) & 0xffff  # strip the '.'

    return u16tone

def short2tone(tone):

    """ Map a binary CTCSS/DCS to a string name for the tone

    """

    if tone == 0 or tone == 0xffff:

        ret = "----"

    else:

        code = tone & 0x3fff

        if tone & 0x4000:      # This is a DCS

            ret = "D%0.3oN" % code

        elif tone & 0x8000:  # This is an inverse code

            ret = "D%0.3oI" % code

        else:   # Just plain old analog CTCSS

            ret = "%4.1f" % (code / 10.0)

    return ret

def _rb15_enter_programming_mode(radio):

    serial = radio.pipe

    # lengthen the timeout here as these radios are resetting due to timeout

    radio.pipe.timeout = 0.75

    exito = False

    for i in range(0, 5):

        serial.write(radio.magic)

        ack = serial.read(1)

        try:

            if ack == CMD_ACK:

                exito = True

                break

        except:

            LOG.debug("Attempt #%s, failed, trying again" % i)

            pass

    # return timeout to default value

    radio.pipe.timeout = 0.25

    # check if we had EXITO

    if exito is False:

        msg = "The radio did not accept program mode after five tries.\n"

        msg += "Check you interface cable and power cycle your radio."

        raise errors.RadioError(msg)

def _rb15_exit_programming_mode(radio):

    serial = radio.pipe

    try:

        serial.write(b"21" + b"\x05\xEE" + b"V")

    except:

        raise errors.RadioError("Radio refused to exit programming mode")

def _rb15_read_block(radio, block_addr, block_size):

    serial = radio.pipe

    cmd = struct.pack(">BH", ord(b'R'), block_addr)

    ccs = bytes([_checksum(cmd)])

    expectedresponse = b"R" + cmd[1:]

    cmd = cmd + ccs

    LOG.debug("Reading block %04x..." % (block_addr))

    try:

        serial.write(cmd)

        response = serial.read(3 + block_size + 1)

        cs = bytes([_checksum(response[:-1])])

        if response[:3] != expectedresponse:

            raise Exception("Error reading block %04x." % (block_addr))

        chunk = response[3:]

        if chunk[-1:] != cs:

            raise Exception("Block failed checksum!")

        block_data = chunk[:-1]

    except:

        raise errors.RadioError("Failed to read block at %04x" % block_addr)

    return block_data

def _rb15_write_block(radio, block_addr, block_size):

    serial = radio.pipe

    cmd = struct.pack(">BH", ord(b'W'), block_addr)

    data = radio.get_mmap()[block_addr:block_addr + block_size]

    cs = bytes([_checksum(cmd + data)])

    data += cs

    LOG.debug("Writing Data:")

    LOG.debug(util.hexprint(cmd + data))

    try:

        serial.write(cmd + data)

        if serial.read(1) != CMD_ACK:

            raise Exception("No ACK")

    except:

        raise errors.RadioError("Failed to send block "

                                "to radio at %04x" % block_addr)

def do_download(radio):

    LOG.debug("download")

    _rb15_enter_programming_mode(radio)

    data = b""

    status = chirp_common.Status()

    status.msg = "Cloning from radio"

    status.cur = 0

    status.max = radio._memsize

    for addr in range(0x0000, radio._memsize, radio.BLOCK_SIZE):

        status.cur = addr + radio.BLOCK_SIZE

        radio.status_fn(status)

        block = _rb15_read_block(radio, addr, radio.BLOCK_SIZE)

        data += block

        LOG.debug("Address: %04x" % addr)

        LOG.debug(util.hexprint(block))

    _rb15_exit_programming_mode(radio)

    return memmap.MemoryMapBytes(data)

def do_upload(radio):

    status = chirp_common.Status()

    status.msg = "Uploading to radio"

    _rb15_enter_programming_mode(radio)

    status.cur = 0

    status.max = radio._memsize

    for start_addr, end_addr in radio._ranges:

        for addr in range(start_addr, end_addr, radio.BLOCK_SIZE):

            status.cur = addr + radio.BLOCK_SIZE

            radio.status_fn(status)

            _rb15_write_block(radio, addr, radio.BLOCK_SIZE)

    _rb15_exit_programming_mode(radio)

def _split(rf, f1, f2):

    """Returns False if the two freqs are in the same band (no split)

    or True otherwise"""

    # determine if the two freqs are in the same band

    for low, high in rf.valid_bands:

        if f1 >= low and f1 <= high and \

                f2 >= low and f2 <= high:

            # if the two freqs are on the same Band this is not a split

            return False

    # if you get here is because the freq pairs are split

    return True

class RB15RadioBase(chirp_common.CloneModeRadio):

    """RETEVIS RB15 BASE"""

    VENDOR = "Retevis"

    BAUD_RATE = 9600

    NEEDS_COMPAT_SERIAL = False

    BLOCK_SIZE = 0x10

    magic = b"21" + b"\x05\x10" + b"x"

    VALID_BANDS = [(400000000, 480000000)]

    _ranges = [

               (0x0150, 0x07A0),

              ]

    _memsize = 0x07A0

    _frs = _pmr = False

    def get_features(self):

        rf = chirp_common.RadioFeatures()

        rf.has_settings = True

        rf.has_bank = False

        rf.has_ctone = True

        rf.has_cross = True

        rf.has_rx_dtcs = True

        rf.has_tuning_step = False

        rf.can_odd_split = True

        rf.has_name = False

        rf.valid_skips = ["", "S"]

        rf.valid_tmodes = ["", "Tone", "TSQL", "DTCS", "Cross"]

        rf.valid_cross_modes = ["Tone->Tone", "Tone->DTCS", "DTCS->Tone",

                                "->Tone", "->DTCS", "DTCS->", "DTCS->DTCS"]

        rf.valid_power_levels = self.POWER_LEVELS

        rf.valid_duplexes = ["", "-", "+", "split", "off"]

        rf.valid_modes = ["FM", "NFM"]  # 25 kHz, 12.5 kHz.

        rf.valid_dtcs_codes = RB15_DTCS

        rf.memory_bounds = (1, self._upper)

        rf.valid_tuning_steps = _STEP_LIST

        rf.valid_bands = self.VALID_BANDS

        return rf

    def process_mmap(self):

        self._memobj = bitwise.parse(MEM_FORMAT, self._mmap)

    def sync_in(self):

        """Download from radio"""

        try:

            data = do_download(self)

        except errors.RadioError:

            # Pass through any real errors we raise

            raise

        except:

            # If anything unexpected happens, make sure we raise

            # a RadioError and log the problem

            LOG.exception('Unexpected error during download')

            raise errors.RadioError('Unexpected error communicating '

                                    'with the radio')

        self._mmap = data

        self.process_mmap()

    def sync_out(self):

        """Upload to radio"""

        try:

            do_upload(self)

        except:

            # If anything unexpected happens, make sure we raise

            # a RadioError and log the problem

            LOG.exception('Unexpected error during upload')

            raise errors.RadioError('Unexpected error communicating '

                                    'with the radio')

    def get_raw_memory(self, number):

        return repr(self._memobj.memory[number - 1])

    def _get_tone(self, _mem, mem):

        """Decode both the encode and decode CTSS/DCS codes from

        the memory channel and stuff them into the UI

        memory channel row.

        """

        txtone = short2tone(_mem.encQT)

        rxtone = short2tone(_mem.decQT)

        pt = "N"

        pr = "N"

        if txtone == "----":

            txmode = ""

        elif txtone[0] == "D":

            mem.dtcs = int(txtone[1:4])

            if txtone[4] == "I":

                pt = "R"

            txmode = "DTCS"

        else:

            mem.rtone = float(txtone)

            txmode = "Tone"

        if rxtone == "----":

            rxmode = ""

        elif rxtone[0] == "D":

            mem.rx_dtcs = int(rxtone[1:4])

            if rxtone[4] == "I":

                pr = "R"

            rxmode = "DTCS"

        else:

            mem.ctone = float(rxtone)

            rxmode = "Tone"

        if txmode == "Tone" and len(rxmode) == 0:

            mem.tmode = "Tone"

        elif (txmode == rxmode and txmode == "Tone" and

              mem.rtone == mem.ctone):

            mem.tmode = "TSQL"

        elif (txmode == rxmode and txmode == "DTCS" and

              mem.dtcs == mem.rx_dtcs):

            mem.tmode = "DTCS"

        elif (len(rxmode) + len(txmode)) > 0:

            mem.tmode = "Cross"

            mem.cross_mode = "%s->%s" % (txmode, rxmode)

        mem.dtcs_polarity = pt + pr

        LOG.debug("_get_tone: Got TX %s (%i) RX %s (%i)" %

                  (txmode, _mem.encQT, rxmode, _mem.decQT))

    def _set_tone(self, mem, _mem):

        """Update the memory channel block CTCC/DCS tones

        from the UI fields

        """

        def _set_dcs(code, pol):

            val = int("%i" % code, 8) | 0x4000

            if pol == "R":

                val = int("%i" % code, 8) | 0x8000

            return val

        rx_mode = tx_mode = None

        rxtone = txtone = 0x0000

        if mem.tmode == "Tone":

            tx_mode = "Tone"

            txtone = int(mem.rtone * 10)

        elif mem.tmode == "TSQL":

            rx_mode = tx_mode = "Tone"

            rxtone = txtone = int(mem.ctone * 10)

        elif mem.tmode == "DTCS":

            tx_mode = rx_mode = "DTCS"

            txtone = _set_dcs(mem.dtcs, mem.dtcs_polarity[0])

            rxtone = _set_dcs(mem.dtcs, mem.dtcs_polarity[1])

        elif mem.tmode == "Cross":

            tx_mode, rx_mode = mem.cross_mode.split("->")

            if tx_mode == "DTCS":

                txtone = _set_dcs(mem.dtcs, mem.dtcs_polarity[0])

            elif tx_mode == "Tone":

                txtone = int(mem.rtone * 10)

            if rx_mode == "DTCS":

                rxtone = _set_dcs(mem.rx_dtcs, mem.dtcs_polarity[1])

            elif rx_mode == "Tone":

                rxtone = int(mem.ctone * 10)

        _mem.decQT = rxtone

        _mem.encQT = txtone

        LOG.debug("Set TX %s (%i) RX %s (%i)" %

                  (tx_mode, _mem.encQT, rx_mode, _mem.decQT))

    def get_memory(self, number):

        mem = chirp_common.Memory()

        _mem = self._memobj.channels[number - 1]

        mem.number = number

        mem.freq = int(_mem.rxfreq) * 10

        # We'll consider any blank (i.e. 0 MHz frequency) to be empty

        if mem.freq == 0:

            mem.empty = True

            return mem

        if _mem.rxfreq.get_raw() == "\xFF\xFF\xFF\xFF":

            mem.freq = 0

            mem.empty = True

            return mem

        if _mem.get_raw() == ("\xFF" * 16):

            LOG.debug("Initializing empty memory")

            _mem.set_raw("\x00" * 16)

        # Freq and offset

        mem.freq = int(_mem.rxfreq) * 10

        # tx freq can be blank

        if _mem.get_raw()[4] == "\xFF":

            # TX freq not set

            mem.offset = 0

            mem.duplex = "off"

        else:

            # TX freq set

            offset = (int(_mem.txfreq) * 10) - mem.freq

            if offset != 0:

                if _split(self.get_features(), mem.freq, int(

                          _mem.txfreq) * 10):

                    mem.duplex = "split"

                    mem.offset = int(_mem.txfreq) * 10

                elif offset < 0:

                    mem.offset = abs(offset)

                    mem.duplex = "-"

                elif offset > 0:

                    mem.offset = offset

                    mem.duplex = "+"

            else:

                mem.offset = 0

        mem.mode = _mem.isnarrow and "NFM" or "FM"

        self._get_tone(_mem, mem)

        mem.power = self.POWER_LEVELS[_mem.lowpower]

        if not _mem.scan:

            mem.skip = "S"

        mem.extra = RadioSettingGroup("Extra", "extra")

        if _mem.bcl > 0x02:

            val = 0

        else:

            val = _mem.bcl

        rs = RadioSetting("bcl", "BCL",

                          RadioSettingValueList(

                              LIST_BCL, LIST_BCL[val]))

        mem.extra.append(rs)

        rs = RadioSetting("encode", "Encode",

                          RadioSettingValueBoolean(_mem.encode))

        mem.extra.append(rs)

        return mem

    def set_memory(self, mem):

        LOG.debug("Setting %i(%s)" % (mem.number, mem.extd_number))

        _mem = self._memobj.channels[mem.number - 1]

        # if empty memory

        if mem.empty:

            _mem.set_raw("\xFF" * 16)

            return

        _mem.isunused = False

        _mem.rxfreq = mem.freq / 10

        if mem.duplex == "off":

            for i in range(0, 4):

                _mem.txfreq[i].set_raw("\xFF")

        elif mem.duplex == "split":

            _mem.txfreq = mem.offset / 10

        elif mem.duplex == "+":

            _mem.txfreq = (mem.freq + mem.offset) / 10

        elif mem.duplex == "-":

            _mem.txfreq = (mem.freq - mem.offset) / 10

        else:

            _mem.txfreq = mem.freq / 10

        _mem.scan = mem.skip != "S"

        _mem.isnarrow = mem.mode == "NFM"

        self._set_tone(mem, _mem)

        _mem.lowpower = mem.power == self.POWER_LEVELS[1]

        for setting in mem.extra:

            setattr(_mem, setting.get_name(), setting.value)

    def get_settings(self):

        _settings = self._memobj.settings

        basic = RadioSettingGroup("basic", "Basic Settings")

        sidekey = RadioSettingGroup("sidekey", "Side Key Settings")

        voxset = RadioSettingGroup("vox", "VOX Settings")

        top = RadioSettings(basic, sidekey, voxset)

        voice = RadioSetting("voice", "Language", RadioSettingValueList(

                             LIST_VOICE, LIST_VOICE[_settings.voice]))

        basic.append(voice)

        beep = RadioSetting("beep", "Key Beep",

                            RadioSettingValueBoolean(_settings.beep))

        basic.append(beep)

        volume = RadioSetting("volume", "Volume Level",

                              RadioSettingValueInteger(

                                  0, 7, _settings.volume))

        basic.append(volume)

        save = RadioSetting("save", "Battery Save",

                            RadioSettingValueList(

                                LIST_SAVE, LIST_SAVE[_settings.save]))

        basic.append(save)

        backlight = RadioSetting("backlight", "Backlight",

                                 RadioSettingValueList(

                                     LIST_BACKLIGHT,

                                     LIST_BACKLIGHT[_settings.backlight]))

        basic.append(backlight)

        vibrate = RadioSetting("vibrate", "Vibrate",

                               RadioSettingValueBoolean(_settings.vibrate))

        basic.append(vibrate)

        autolock = RadioSetting("autolock", "Auto Lock",

                                RadioSettingValueBoolean(_settings.autolock))

        basic.append(autolock)

        calltone = RadioSetting("calltone", "Call Tone",

                                RadioSettingValueInteger(

                                    1, 10, _settings.calltone))

        basic.append(calltone)

        roger = RadioSetting("roger", "Roger Tone",

                             RadioSettingValueList(

                                 LIST_ROGER, LIST_ROGER[_settings.roger]))

        basic.append(roger)

        squelch = RadioSetting("squelch", "Squelch Level",

                               RadioSettingValueInteger(

                                   0, 10, _settings.squelch))

        basic.append(squelch)

        def apply_tot_listvalue(setting, obj):

            LOG.debug("Setting value: " + str(

                      setting.value) + " from list")

            val = str(setting.value)

            index = TOT_CHOICES.index(val)

            val = TOT_VALUES[index]

            obj.set_value(val)

        if _settings.tot in TOT_VALUES:

            idx = TOT_VALUES.index(_settings.tot)

        else:

            idx = TOT_VALUES.index(0x78)

        rs = RadioSettingValueList(TOT_CHOICES, TOT_CHOICES[idx])

        rset = RadioSetting("tot", "Time-out Timer", rs)

        rset.set_apply_callback(apply_tot_listvalue, _settings.tot)

        basic.append(rset)

        # Side Key Settings

        def apply_skey_listvalue(setting, obj):

            LOG.debug("Setting value: " + str(

                      setting.value) + " from list")

            val = str(setting.value)

            index = SKEY_CHOICES.index(val)

            val = SKEY_VALUES[index]

            obj.set_value(val)

        # Side Key (Upper) - Short Press

        if _settings.skeyus in SKEY_VALUES:

            idx = SKEY_VALUES.index(_settings.skeyus)

        else:

            idx = SKEY_VALUES.index(0x01)

        rs = RadioSettingValueList(SKEY_CHOICES, SKEY_CHOICES[idx])

        rset = RadioSetting("skeyus", "Side Key(upper) - Short Press", rs)

        rset.set_apply_callback(apply_skey_listvalue, _settings.skeyus)

        sidekey.append(rset)

        # Side Key (Upper) - Long Press

        if _settings.skeyul in SKEY_VALUES:

            idx = SKEY_VALUES.index(_settings.skeyul)

        else:

            idx = SKEY_VALUES.index(0x04)

        rs = RadioSettingValueList(SKEY_CHOICES, SKEY_CHOICES[idx])

        rset = RadioSetting("skeyul", "Side Key(upper) - Long Press", rs)

        rset.set_apply_callback(apply_skey_listvalue, _settings.skeyul)

        sidekey.append(rset)

        # Side Key (Lower) - Short Press

        if _settings.skeyds in SKEY_VALUES:

            idx = SKEY_VALUES.index(_settings.skeyds)

        else:

            idx = SKEY_VALUES.index(0x03)

        rs = RadioSettingValueList(SKEY_CHOICES, SKEY_CHOICES[idx])

        rset = RadioSetting("skeyds", "Side Key(lower) - Short Press", rs)

        rset.set_apply_callback(apply_skey_listvalue, _settings.skeyds)

        sidekey.append(rset)

        # Side Key (Lower) - Long Press

        if _settings.skeyul in SKEY_VALUES:

            idx = SKEY_VALUES.index(_settings.skeydl)

        else:

            idx = SKEY_VALUES.index(0x14)

        rs = RadioSettingValueList(SKEY_CHOICES, SKEY_CHOICES[idx])

        rset = RadioSetting("skeydl", "Side Key(lower) - Long Press", rs)

        rset.set_apply_callback(apply_skey_listvalue, _settings.skeydl)

        sidekey.append(rset)

        # VOX Settings

        vox = RadioSetting("vox", "VOX",

                           RadioSettingValueBoolean(_settings.vox))

        voxset.append(vox)

        voxl = RadioSetting("voxl", "VOX Level",

                            RadioSettingValueInteger(

                                0, 10, _settings.voxl))

        voxset.append(voxl)

        voxd = RadioSetting("voxd", "VOX Delay (seconde)",

                            RadioSettingValueList(

                                LIST_VOXD, LIST_VOXD[_settings.voxd]))

        voxset.append(voxd)

        return top

    def set_settings(self, settings):

        for element in settings:

            if not isinstance(element, RadioSetting):

                self.set_settings(element)

                continue

            else:

                try:

                    if "." in element.get_name():

                        bits = element.get_name().split(".")

                        obj = self._memobj

                        for bit in bits[:-1]:

                            obj = getattr(obj, bit)

                        setting = bits[-1]

                    else:

                        obj = self._memobj.settings

                        setting = element.get_name()

                    if element.has_apply_callback():

                        LOG.debug("Using apply callback")

                        element.run_apply_callback()

                    elif element.value.get_mutable():

                        LOG.debug("Setting %s = %s" % (setting, element.value))

                        setattr(obj, setting, element.value)

                except Exception:

                    LOG.debug(element.get_name())

                    raise

    @classmethod

    def match_model(cls, filedata, filename):

        # This radio has always been post-metadata, so never do

        # old-school detection

        return False

@directory.register

class RB15Radio(RB15RadioBase):

    """RETEVIS RB15"""

    VENDOR = "Retevis"

    MODEL = "RB15"

    POWER_LEVELS = [chirp_common.PowerLevel("High", watts=2.00),

                    chirp_common.PowerLevel("Low", watts=0.50)]

    _ranges = [

               (0x0150, 0x07A0),

              ]

    _memsize = 0x07A0

    _upper = 99

    _frs = False  # sold as FRS radio but supports full band TX/RX

@directory.register

class RB615RadioBase(RB15RadioBase):

    """RETEVIS RB615"""

    VENDOR = "Retevis"

    MODEL = "RB615"

    POWER_LEVELS = [chirp_common.PowerLevel("High", watts=2.00),

                    chirp_common.PowerLevel("Low", watts=0.50)]

    _ranges = [

               (0x0150, 0x07A0),

              ]

    _memsize = 0x07A0

    _upper = 99

    _pmr = False  # sold as PMR radio but supports full band TX/RX