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# Copyright 2019 Dan Smith <dsmith@danplanet.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 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 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 builtins import bytes
import struct
from chirp.drivers import icf
import logging
LOG = logging.getLogger(__name__)
import sys
l = logging.getLogger()
l.level = logging.ERROR
l.addHandler(logging.StreamHandler(sys.stdout))
class FakeIcomRadio(object):
def __init__(self, radio, mapfile=None):
self._buffer = bytes(b'')
self._radio = radio
if not mapfile:
self._memory = bytes(b'\x00') * radio.get_memsize()
else:
self.load_from_file(mapfile)
def load_from_file(self, filename):
with open(filename, 'rb') as f:
self._memory = bytes(f.read())
LOG.debug('Initialized %i bytes from %s' % (len(self._memory),
filename))
def read(self, count):
"""read() from radio, so here we synthesize responses"""
chunk = self._buffer[:count]
self._buffer = self._buffer[count:]
return chunk
def queue(self, data):
# LOG.debug('Queuing: %r' % data)
self._buffer += data
def make_response(self, cmd, payload):
return bytes([
0xFE, 0xFE,
0xEF, # Radio
0xEE, # PC
cmd,
]) + payload + bytes([0xFD])
@property
def address_fmt(self):
if self._radio.get_memsize() > 0x10000:
return 'I'
else:
return 'H'
def do_clone_out(self):
LOG.debug('Clone from radio started')
size = 16
for addr in range(0, self._radio.get_memsize(), size):
if len(self._memory[addr:]) < 4:
# IC-W32E has an off-by-one hack for detection,
# which will cause us to send a short one-byte
# block of garbage, unlike the real radio. So,
# if we get to the end and have a few bytes
# left, don't be stupid.
break
header = bytes(struct.pack('>%sB' % self.address_fmt,
addr, size))
#LOG.debug('Header for %02x@%04x: %r' % (
# size, addr, header))
chunk = []
cs = 0
for byte in header:
chunk.extend(x for x in bytes(b'%02X' % byte))
cs += byte
#LOG.debug('Chunk so far: %r' % chunk)
for byte in self._memory[addr:addr + size]:
chunk.extend(x for x in bytes(b'%02X' % byte))
cs += byte
#LOG.debug('Chunk is %r' % chunk)
vx = ((cs ^ 0xFFFF) + 1) & 0xFF
chunk.extend(x for x in bytes(b'%02X' % vx))
self.queue(self.make_response(icf.CMD_CLONE_DAT, bytes(chunk)))
#LOG.debug('Stopping after first frame')
#break
self.queue(self.make_response(icf.CMD_CLONE_END, bytes([])))
def do_clone_in(self):
LOG.debug('Clone to radio started')
self._memory = bytes(b'')
def do_clone_data(self, payload_hex):
if self.address_fmt == 'I':
header_len = 5
else:
header_len = 3
def hex_to_byte(hexchars):
return int('%s%s' % (chr(hexchars[0]), chr(hexchars[1])), 16)
payload_bytes = bytes([hex_to_byte(payload_hex[i:i+2])
for i in range(0, len(payload_hex), 2)])
addr, size = struct.unpack('>%sB' % self.address_fmt, payload_bytes[:header_len])
data = payload_bytes[header_len:-1]
csum = payload_bytes[-1]
#addr_hex = payload[0:size_offset]
#size_hex = payload[size_offset:size_offset + 2]
#data_hex = payload[size_offset + 2:-2]
#csum_hex = payload[-2:]
#addr = hex_to_byte(addr_hex[0:2]) << 8 | hex_to_byte(addr_hex[2:4])
#size = hex_to_byte(size_hex)
#csum = hex_to_byte(csum_hex)
#data = []
#for i in range(0, len(data_hex), 2):
# data.append(hex_to_byte(data_hex[i:i+2]))
if len(data) != size:
LOG.debug('Invalid frame size: expected %i, but got %i' % (
size, len(data)))
expected_addr = len(self._memory)
if addr < expected_addr:
LOG.debug('Frame goes back to %04x from %04x' % (addr,
expected_addr))
if len(self._memory) != addr:
LOG.debug('Filling gap between %04x and %04x' % (expected_addr,
addr))
self._memory += (bytes(b'\x00') * (addr - expected_addr))
# FIXME: Check checksum
self._memory += data
def write(self, data):
"""write() to radio, so here we process requests"""
assert isinstance(data, bytes), 'Bytes required, %s received' % data.__class__
if data[:12] == (bytes(b'\xFE') * 12):
LOG.debug('Got hispeed kicker')
data = data[12:]
if data[2] == 0xFE:
return
src = data[2]
dst = data[3]
cmd = data[4]
payload = data[5:-1]
end = data[-1]
LOG.debug('Received command: %r' % cmd)
LOG.debug(' Full frame: %r' % data)
model = self._radio.get_model() + bytes(b'\x00' * 20)
if cmd == 0xE0: # Ident
# FIXME
self.queue(self.make_response(0x01, # Model
model))
elif cmd == icf.CMD_CLONE_OUT:
self.do_clone_out()
elif cmd == icf.CMD_CLONE_IN:
self.do_clone_in()
elif cmd == icf.CMD_CLONE_DAT:
self.do_clone_data(payload)
else:
LOG.debug('Unknown command %i' % cmd)
self.queue(self.make_response(0x00, bytes([0x01])))
return len(data)
def flush(self):
return
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