CHIRP

# Copyright 2014 Tom Hayward <tom@tomh.us>

# Copyright 2014 Jens Jensen <af5mi@yahoo.com>

# Copyright 2014 James Lee N1DDK <jml@jmlzone.com>

# Copyright 2016 Nathan Crapo <nathan_crapo@yahoo.com>  (TH-7800 only)

#

# 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/>.

from chirp import bitwise, chirp_common, directory, errors, util, memmap

import struct

from chirp.settings import RadioSetting, RadioSettingGroup, \

    RadioSettingValueInteger, RadioSettingValueList, \

    RadioSettingValueBoolean, RadioSettingValueString, \

    RadioSettingValueFloat, InvalidValueError, RadioSettings, \

    RadioSettingValueMap, zero_indexed_seq_map

from chirp.chirp_common import format_freq

import logging

from datetime import date

LOG = logging.getLogger(__name__)

TH7800_MEM_FORMAT = """

struct mem {

  lbcd rx_freq[4];

  lbcd tx_freq[4];

  lbcd ctcss[2];

  lbcd dtcs[2];

  u8 power:2,

     clk_sft:1,

     unknown0a:2,

     display:1,     // freq=0, name=1

     scan:2;

  u8 fmdev:2,       // wide=00, mid=01, narrow=10

     scramb:1,

     compand:1,

     emphasis:1

     unknown1a:2,

     sqlmode:1;     // carrier, tone

  u8 rptmod:2,      // off, -, +

     reverse:1,

     talkaround:1,

     step:4;

  u8 dtcs_pol:2,

     unknown3:4,

     tmode:2;

  lbcd offset[4];

  u8 hsdtype:2,     // off, 2-tone, 5-tone, dtmf

     unknown5a:1,

     am:1,

     unknown5b:4;

  u8 unknown6[3];

  char name[6];

  u8 empty[2];

};

#seekto 0x%04X;

struct mem memory[800];

#seekto 0x%04X;

struct {

  struct mem lower;

  struct mem upper;

} scanlimits[5];

#seekto 0x%04X;

struct {

    u8  unk0xdc20:5,

        left_sql:3;

    u8  apo;

    u8  unk0xdc22:5,

        backlight:3;

    u8  unk0xdc23;

    u8  beep:1,

        keylock:1,

        pttlock:2,

        unk0xdc24_32:2,

        hyper_chan:1,

        right_func_key:1;

    u8  tbst_freq:2,

        unk0xdc25_4:2,

        mute_mode:2,

        unk0xdc25_10:2;

    u8  ars:1,

        unk0xdc26_54:3,

        auto_am:1,

        unk0xdc26_210:3;

    u8  unk0xdc27_76543:5,

        scan_mode:1,

        unk0xdc27_1:1,

        scan_resume:1;

    u16 scramb_freq;

    u16 scramb_freq1;

    u8  unk0xdc2c;

    u8  unk0xdc2d;

    u8  unk0xdc2e:5,

        right_sql:3;

    u8  unk0xdc2f:8;

    u8  tot;

    u8  unk0xdc30;

    u8  unk0xdc31;

    u8  unk0xdc32;

    u8  unk0xdc34;

    u8  unk0xdc35;

    u8  unk0xdc36;

    u8  unk0xdc37;

    u8  p1;

    u8  p2;

    u8  p3;

    u8  p4;

} settings;

#seekto 0x%04X;

u8  chan_active[128];

u8  scan_enable[128];

u8  priority[128];

#seekto 0x%04X;

struct {

    char sn[8];

    char model[8];

    char code[16];

    u8 empty[8];

    lbcd prog_yr[2];

    lbcd prog_mon;

    lbcd prog_day;

    u8 empty_10f2c[4];

} info;

struct {

  lbcd lorx[4];

  lbcd hirx[4];

  lbcd lotx[4];

  lbcd hitx[4];

} bandlimits[9];

"""

BLANK_MEMORY = "\xFF" * 8 + "\x00\x10\x23\x00\xC0\x08\x06\x00" \

               "\x00\x00\x76\x00\x00\x00" + "\xFF" * 10

DTCS_POLARITY = ["NN", "RN", "NR", "RR"]

SCAN_MODES = ["", "S", "P"]

MODES = ["WFM", "FM", "NFM"]

TMODES = ["", "Tone", "TSQL", "DTCS"]

POWER_LEVELS = [chirp_common.PowerLevel("Low", watts=5.00),

                chirp_common.PowerLevel("Mid2", watts=10.00),

                chirp_common.PowerLevel("Mid1", watts=20.00),

                chirp_common.PowerLevel("High", watts=50.00)]

BUSY_LOCK = ["off", "Carrier", "2 tone"]

MICKEYFUNC = ["None", "SCAN", "SQL.OFF", "TCALL", "PPTR", "PRI", "LOW", "TONE",

              "MHz", "REV", "HOME", "BAND", "VFO/MR"]

SQLPRESET = ["Off", "2", "5", "9", "Full"]

BANDS = ["30MHz", "50MHz", "60MHz", "108MHz", "150MHz", "250MHz", "350MHz",

         "450MHz", "850MHz"]

STEPS = [2.5, 5.0, 6.25, 7.5, 8.33, 10.0, 12.5,

         15.0, 20.0, 25.0, 30.0, 50.0, 100.0]

def add_radio_setting(radio_setting_group, mem_field, ui_name, option_map,

                      current, doc=None):

    setting = RadioSetting(mem_field, ui_name,

                           RadioSettingValueMap(option_map, current))

    if doc is not None:

        setting.set_doc(doc)

    radio_setting_group.append(setting)

def add_radio_bool(radio_setting_group, mem_field, ui_name, current, doc=None):

    setting = RadioSetting(mem_field, ui_name,

                           RadioSettingValueBoolean(bool(current)))

    radio_setting_group.append(setting)

class TYTTH7800Base(chirp_common.Radio):

    """Base class for TYT TH-7800"""

    VENDOR = "TYT"

    def get_features(self):

        rf = chirp_common.RadioFeatures()

        rf.memory_bounds = (1, 800)

        rf.has_bank = False

        rf.has_tuning_step = True

        rf.valid_tuning_steps = STEPS

        rf.can_odd_split = True

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

        rf.valid_tmodes = TMODES

        rf.has_ctone = False

        rf.valid_power_levels = POWER_LEVELS

        rf.valid_characters = chirp_common.CHARSET_UPPER_NUMERIC + "#*-+"

        rf.valid_bands = [(108000000, 180000000),

                          (350000000, 399995000),

                          (400000000, 512000000)]

        rf.valid_skips = SCAN_MODES

        rf.valid_modes = MODES + ["AM"]

        rf.valid_name_length = 6

        rf.has_settings = True

        return rf

    def process_mmap(self):

        self._memobj = bitwise.parse(

            TH7800_MEM_FORMAT %

            (self._mmap_offset, self._scanlimits_offset, self._settings_offset,

             self._chan_active_offset, self._info_offset), self._mmap)

    def get_active(self, banktype, num):

        """get active flag for channel active,

        scan enable, or priority banks"""

        bank = getattr(self._memobj, banktype)

        index = (num - 1) // 8

        bitpos = (num - 1) % 8

        mask = 2**bitpos

        enabled = bank[index] & mask

        if enabled:

            return True

        else:

            return False

    def set_active(self, banktype, num, enable=True):

        """set active flag for channel active,

        scan enable, or priority banks"""

        bank = getattr(self._memobj, banktype)

        index = (num - 1) // 8

        bitpos = (num - 1) % 8

        mask = 2**bitpos

        if enable:

            bank[index] |= mask

        else:

            bank[index] &= ~mask

    def get_raw_memory(self, number):

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

    def get_memory(self, number):

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

        mem = chirp_common.Memory()

        mem.number = number

        mem.empty = not self.get_active("chan_active", number)

        if mem.empty:

            return mem

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

        txfreq = int(_mem.tx_freq) * 10

        if txfreq == mem.freq:

            mem.duplex = ""

        elif txfreq == 0:

            mem.duplex = "off"

            mem.offset = 0

        elif abs(txfreq - mem.freq) > 70000000:

            mem.duplex = "split"

            mem.offset = txfreq

        elif txfreq < mem.freq:

            mem.duplex = "-"

            mem.offset = mem.freq - txfreq

        elif txfreq > mem.freq:

            mem.duplex = "+"

            mem.offset = txfreq - mem.freq

        mem.dtcs_polarity = DTCS_POLARITY[_mem.dtcs_pol]

        mem.tmode = TMODES[int(_mem.tmode)]

        mem.ctone = mem.rtone = int(_mem.ctcss) / 10.0

        mem.dtcs = int(_mem.dtcs)

        mem.name = str(_mem.name)

        mem.name = mem.name.replace("\xFF", " ").rstrip()

        if not self.get_active("scan_enable", number):

            mem.skip = "S"

        elif self.get_active("priority", number):

            mem.skip = "P"

        else:

            mem.skip = ""

        mem.mode = _mem.am and "AM" or MODES[int(_mem.fmdev)]

        mem.power = POWER_LEVELS[_mem.power]

        mem.tuning_step = STEPS[_mem.step]

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

        add_radio_setting(mem.extra, "display", "Display",

                          zero_indexed_seq_map(["Frequency", "Name"]),

                          _mem.display)

        add_radio_setting(mem.extra, "hsdtype", "HSD TYPE",

                          zero_indexed_seq_map(["OFF", "2TON", "5TON",

                                                "DTMF"]),

                          _mem.hsdtype)

        add_radio_bool(mem.extra, "clk_sft", "CLK-SFT", _mem.clk_sft)

        add_radio_bool(mem.extra, "compand", "Compand", _mem.compand,

                       doc="Compress Audio")

        add_radio_bool(mem.extra, "talkaround", "Talk Around", _mem.talkaround,

                       doc="Simplex mode when out of range of repeater")

        add_radio_bool(mem.extra, "scramb", "Scramble", _mem.scramb,

                       doc="Frequency inversion Scramble")

        return mem

    def set_memory(self, mem):

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

        _prev_active = self.get_active("chan_active", mem.number)

        self.set_active("chan_active", mem.number, not mem.empty)

        if mem.empty or not _prev_active:

            LOG.debug("initializing memory channel %d" % mem.number)

            _mem.set_raw(BLANK_MEMORY)

        if mem.empty:

            return

        _mem.rx_freq = mem.freq / 10

        if mem.duplex == "split":

            _mem.tx_freq = mem.offset / 10

        elif mem.duplex == "-":

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

        elif mem.duplex == "+":

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

        elif mem.duplex == "off":

            _mem.tx_freq = 0

            _mem.offset = 0

        else:

            _mem.tx_freq = mem.freq / 10

        _mem.tmode = TMODES.index(mem.tmode)

        if mem.tmode == "TSQL" or mem.tmode == "DTCS":

            _mem.sqlmode = 1

        else:

            _mem.sqlmode = 0

        _mem.ctcss = mem.rtone * 10

        _mem.dtcs = mem.dtcs

        _mem.dtcs_pol = DTCS_POLARITY.index(mem.dtcs_polarity)

        _mem.name = mem.name.ljust(6, "\xFF")

        # autoset display to name if filled, else show frequency

        if mem.extra:

            # mem.extra only seems to be populated when called from edit panel

            display = mem.extra["display"]

        else:

            display = None

        if mem.name:

            _mem.display = True

            if display and not display.changed():

                display.value = "Name"

        else:

            _mem.display = False

            if display and not display.changed():

                display.value = "Frequency"

        _mem.scan = SCAN_MODES.index(mem.skip)

        if mem.skip == "P":

            self.set_active("priority", mem.number, True)

            self.set_active("scan_enable", mem.number, True)

        elif mem.skip == "S":

            self.set_active("priority", mem.number, False)

            self.set_active("scan_enable", mem.number, False)

        elif mem.skip == "":

            self.set_active("priority", mem.number, False)

            self.set_active("scan_enable", mem.number, True)

        if mem.mode == "AM":

            _mem.am = True

            _mem.fmdev = 0

        else:

            _mem.am = False

            _mem.fmdev = MODES.index(mem.mode)

        if mem.power:

            _mem.power = POWER_LEVELS.index(mem.power)

        else:

            _mem.power = 0    # low

        _mem.step = STEPS.index(mem.tuning_step)

        for setting in mem.extra:

            LOG.debug("@set_mem:", setting.get_name(), setting.value)

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

    def get_settings(self):

        _settings = self._memobj.settings

        _info = self._memobj.info

        _bandlimits = self._memobj.bandlimits

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

        info = RadioSettingGroup("info", "Model Info")

        top = RadioSettings(basic, info)

        add_radio_bool(basic, "beep", "Beep", _settings.beep)

        add_radio_bool(basic, "ars", "Auto Repeater Shift", _settings.ars)

        add_radio_setting(basic, "keylock", "Key Lock",

                          zero_indexed_seq_map(["Manual", "Auto"]),

                          _settings.keylock)

        add_radio_bool(basic, "auto_am", "Auto AM", _settings.auto_am)

        add_radio_setting(basic, "left_sql", "Left Squelch",

                          zero_indexed_seq_map(SQLPRESET),

                          _settings.left_sql)

        add_radio_setting(basic, "right_sql", "Right Squelch",

                          zero_indexed_seq_map(SQLPRESET),

                          _settings.right_sql)

        add_radio_setting(basic, "apo", "Auto Power off (Hours)",

                          [("Off", 0), ("0.5", 5), ("1.0", 10), ("1.5", 15),

                           ("2.0", 20)],

                          _settings.apo)

        add_radio_setting(basic, "backlight", "Display Backlight",

                          zero_indexed_seq_map(["Off", "1", "2", "3", "Full"]),

                          _settings.backlight)

        add_radio_setting(basic, "pttlock", "PTT Lock",

                          zero_indexed_seq_map(["Off", "Right", "Left",

                                                "Both"]),

                          _settings.pttlock)

        add_radio_setting(basic, "hyper_chan", "Hyper Channel",

                          zero_indexed_seq_map(["Manual", "Auto"]),

                          _settings.hyper_chan)

        add_radio_setting(basic, "right_func_key", "Right Function Key",

                          zero_indexed_seq_map(["Key 1", "Key 2"]),

                          _settings.right_func_key)

        add_radio_setting(basic, "mute_mode", "Mute Mode",

                          zero_indexed_seq_map(["Off", "TX", "RX", "TX RX"]),

                          _settings.mute_mode)

        add_radio_setting(basic, "scan_mode", "Scan Mode",

                          zero_indexed_seq_map(["MEM", "MSM"]),

                          _settings.scan_mode,

                          doc="MEM = Normal scan, bypass channels marked "

                          "skip. MSM = Scan only channels marked priority.")

        add_radio_setting(basic, "scan_resume", "Scan Resume",

                          zero_indexed_seq_map(["Time", "Busy"]),

                          _settings.scan_resume)

        basic.append(RadioSetting(

                "tot", "Time Out Timer (minutes)",

                RadioSettingValueInteger(0, 30, _settings.tot)))

        add_radio_setting(basic, "p1", "P1 Function",

                          zero_indexed_seq_map(MICKEYFUNC),

                          _settings.p1)

        add_radio_setting(basic, "p2", "P2 Function",

                          zero_indexed_seq_map(MICKEYFUNC),

                          _settings.p2)

        add_radio_setting(basic, "p3", "P3 Function",

                          zero_indexed_seq_map(MICKEYFUNC),

                          _settings.p3)

        add_radio_setting(basic, "p4", "P4 Function",

                          zero_indexed_seq_map(MICKEYFUNC),

                          _settings.p4)

        def _filter(name):

            filtered = ""

            for char in str(name):

                if char in chirp_common.CHARSET_ASCII:

                    filtered += char

                else:

                    filtered += " "

            return filtered

        rsvs = RadioSettingValueString(0, 8, _filter(_info.sn))

        rsvs.set_mutable(False)

        rs = RadioSetting("sn", "Serial Number", rsvs)

        info.append(rs)

        rsvs = RadioSettingValueString(0, 8, _filter(_info.model))

        rsvs.set_mutable(False)

        rs = RadioSetting("model", "Model Name", rsvs)

        info.append(rs)

        rsvs = RadioSettingValueString(0, 16, _filter(_info.code))

        rsvs.set_mutable(False)

        rs = RadioSetting("code", "Model Code", rsvs)

        info.append(rs)

        progdate = "%d/%d/%d" % (_info.prog_mon, _info.prog_day,

                                 _info.prog_yr)

        rsvs = RadioSettingValueString(0, 10, progdate)

        rsvs.set_mutable(False)

        rs = RadioSetting("progdate", "Last Program Date", rsvs)

        info.append(rs)

        # Band Limits

        for i in range(0, len(BANDS)):

            rx_start = int(_bandlimits[i].lorx) * 10

            if not rx_start == 0:

                objname = BANDS[i] + "lorx"

                objnamepp = BANDS[i] + " Rx Start"

                rsv = RadioSettingValueString(0, 10, format_freq(rx_start))

                rsv.set_mutable(False)

                rs = RadioSetting(objname, objnamepp, rsv)

                info.append(rs)

                rx_end = int(_bandlimits[i].hirx) * 10

                objname = BANDS[i] + "hirx"

                objnamepp = BANDS[i] + " Rx end"

                rsv = RadioSettingValueString(0, 10, format_freq(rx_end))

                rsv.set_mutable(False)

                rs = RadioSetting(objname, objnamepp, rsv)

                info.append(rs)

            tx_start = int(_bandlimits[i].lotx) * 10

            if not tx_start == 0:

                objname = BANDS[i] + "lotx"

                objnamepp = BANDS[i] + " Tx Start"

                rsv = RadioSettingValueString(0, 10, format_freq(tx_start))

                rsv.set_mutable(False)

                rs = RadioSetting(objname, objnamepp, rsv)

                info.append(rs)

                tx_end = int(_bandlimits[i].hitx) * 10

                objname = BANDS[i] + "hitx"

                objnamepp = BANDS[i] + " Tx end"

                rsv = RadioSettingValueString(0, 10, format_freq(tx_end))

                rsv.set_mutable(False)

                rs = RadioSetting(objname, objnamepp, rsv)

                info.append(rs)

        return top

    def set_settings(self, settings):

        _settings = self._memobj.settings

        _info = self._memobj.info

        _bandlimits = self._memobj.bandlimits

        for element in settings:

            if not isinstance(element, RadioSetting):

                self.set_settings(element)

                continue

            if not element.changed():

                continue

            try:

                setting = element.get_name()

                oldval = getattr(_settings, setting)

                newval = element.value

                LOG.debug("Setting %s(%s) <= %s" % (setting, oldval, newval))

                setattr(_settings, setting, newval)

            except Exception as e:

                LOG.debug(element.get_name())

                raise

@directory.register

class TYTTH7800File(TYTTH7800Base, chirp_common.FileBackedRadio):

    """TYT TH-7800 .dat file"""

    MODEL = "TH-7800 File"

    FILE_EXTENSION = "dat"

    _memsize = 69632

    _mmap_offset = 0x1100

    _scanlimits_offset = 0xC800 + _mmap_offset

    _settings_offset = 0xCB20 + _mmap_offset

    _chan_active_offset = 0xCB80 + _mmap_offset

    _info_offset = 0xfe00 + _mmap_offset

    def __init__(self, pipe):

        self.errors = []

        self._mmap = None

        if isinstance(pipe, str):

            self.pipe = None

            self.load_mmap(pipe)

        else:

            chirp_common.FileBackedRadio.__init__(self, pipe)

    @classmethod

    def match_model(cls, filedata, filename):

        return len(filedata) == cls._memsize and filename.endswith('.dat')

def _identify(radio):

    """Do identify handshake with TYT"""

    try:

        radio.pipe.write(b"\x02SPECPR")

        ack = radio.pipe.read(1)

        if ack != b"A":

            util.hexprint(ack)

            raise errors.RadioError("Radio did not ACK first command: %r"

                                    % ack)

    except:

        raise errors.RadioError("Unable to communicate with the radio")

    radio.pipe.write(b"G\x02")

    ident = radio.pipe.read(16)

    radio.pipe.write(b"A")

    r = radio.pipe.read(2)

    if r != b"A":

        raise errors.RadioError("Ack failed")

    return ident

def _download(radio, memsize=0x10000, blocksize=0x80):

    """Download from TYT TH-7800"""

    data = _identify(radio)

    LOG.info("ident:", util.hexprint(data))

    offset = 0x100

    for addr in range(offset, memsize, blocksize):

        msg = struct.pack(">cHB", b"R", addr, blocksize)

        radio.pipe.write(msg)

        block = radio.pipe.read(blocksize + 4)

        if len(block) != (blocksize + 4):

            LOG.debug(util.hexprint(block))

            raise errors.RadioError("Radio sent a short block")

        radio.pipe.write(b"A")

        ack = radio.pipe.read(1)

        if ack != b"A":

            LOG.debug(util.hexprint(ack))

            raise errors.RadioError("Radio NAKed block")

        data += block[4:]

        if radio.status_fn:

            status = chirp_common.Status()

            status.cur = addr

            status.max = memsize

            status.msg = "Cloning from radio"

            radio.status_fn(status)

    radio.pipe.write(b"ENDR")

    return memmap.MemoryMapBytes(data)

def _upload(radio, memsize=0xF400, blocksize=0x80):

    """Upload to TYT TH-7800"""

    data = _identify(radio)

    radio.pipe.timeout = 1

    if data != radio._mmap[:radio._mmap_offset]:

        raise errors.RadioError(

            "Model mismatch: \n%s\n%s" %

            (util.hexprint(data),

             util.hexprint(radio._mmap[:radio._mmap_offset])))

    # in the factory software they update the last program date when

    # they upload, So let's do the same

    today = date.today()

    y = today.year

    m = today.month

    d = today.day

    _info = radio._memobj.info

    ly = _info.prog_yr

    lm = _info.prog_mon

    ld = _info.prog_day

    LOG.debug("Updating last program date:%d/%d/%d" % (lm, ld, ly))

    LOG.debug("                  to today:%d/%d/%d" % (m, d, y))

    _info.prog_yr = y

    _info.prog_mon = m

    _info.prog_day = d

    offset = 0x0100

    for addr in range(offset, memsize, blocksize):

        mapaddr = addr + radio._mmap_offset - offset

        LOG.debug("addr: 0x%04X, mmapaddr: 0x%04X" % (addr, mapaddr))

        msg = struct.pack(">cHB", b"W", addr, blocksize)

        msg += radio._mmap[mapaddr:(mapaddr + blocksize)]

        LOG.debug(util.hexprint(msg))

        radio.pipe.write(msg)

        ack = radio.pipe.read(1)

        if ack != b"A":

            LOG.debug(util.hexprint(ack))

            raise errors.RadioError("Radio did not ack block 0x%04X" % addr)

        if radio.status_fn:

            status = chirp_common.Status()

            status.cur = addr

            status.max = memsize

            status.msg = "Cloning to radio"

            radio.status_fn(status)

    # End of clone

    radio.pipe.write(b"ENDW")

    # Checksum?

    final_data = radio.pipe.read(3)

    LOG.debug("final:", util.hexprint(final_data))

@directory.register

class TYTTH7800Radio(TYTTH7800Base, chirp_common.CloneModeRadio,

                     chirp_common.ExperimentalRadio):

    VENDOR = "TYT"

    MODEL = "TH-7800"

    BAUD_RATE = 38400

    NEEDS_COMPAT_SERIAL = False

    _memsize = 65296

    _mmap_offset = 0x0010

    _scanlimits_offset = 0xC800 + _mmap_offset

    _settings_offset = 0xCB20 + _mmap_offset

    _chan_active_offset = 0xCB80 + _mmap_offset

    _info_offset = 0xfe00 + _mmap_offset

    @classmethod

    def match_model(cls, filedata, filename):

        if len(filedata) != cls._memsize:

            return False

        # TYT used TH9800 as model for TH-7800 _AND_ TH-9800.  Check

        # for TH7800 in case they fix it or if users update the model

        # in their own radio.

        if not (filedata[0xfe18:0xfe1e] == b"TH9800" or

                filedata[0xfe18:0xfe1e] == b"TH7800"):

            return False

        # TH-7800 bandlimits differ from TH-9800.  First band Invalid

        # (zero).

        first_bandlimit = struct.unpack("BBBBBBBBBBBBBBBB",

                                        filedata[0xfe40:0xfe50])

        if not all(v == 0 for v in first_bandlimit):

            return False

        return True

    @classmethod

    def get_prompts(cls):

        rp = chirp_common.RadioPrompts()

        rp.experimental = (

         'This is experimental support for TH-7800 '

         'which is still under development.\n'

         'Please ensure you have a good backup with OEM software.\n'

         'Also please send in bug and enhancement requests!\n'

         'You have been warned. Proceed at your own risk!')

        return rp

    def sync_in(self):

        try:

            self._mmap = _download(self)

        except Exception as e:

            raise errors.RadioError(

                    "Failed to communicate with the radio: %s" % e)

        self.process_mmap()

    def sync_out(self):

        try:

            _upload(self)

        except Exception as e:

            raise errors.RadioError(

                    "Failed to communicate with the radio: %s" % e)