239 lines
7.5 KiB
Python
239 lines
7.5 KiB
Python
## Copyright (C) 2012-2013 Daniel Pavel
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License along
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## with this program; if not, write to the Free Software Foundation, Inc.,
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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import argparse
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import os
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import os.path
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import readline
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import sys
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import time
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from binascii import hexlify
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from binascii import unhexlify
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from select import select
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from threading import Lock
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from threading import Thread
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import hidapi
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LOGITECH_VENDOR_ID = 0x046D
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interactive = os.isatty(0)
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prompt = "?? Input: " if interactive else ""
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start_time = time.time()
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def strhex(d):
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return hexlify(d).decode("ascii").upper()
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print_lock = Lock()
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def _print(marker, data, scroll=False):
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t = time.time() - start_time
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if isinstance(data, str):
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s = marker + " " + data
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else:
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hexs = strhex(data)
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s = "%s (% 8.3f) [%s %s %s %s] %s" % (marker, t, hexs[0:2], hexs[2:4], hexs[4:8], hexs[8:], repr(data))
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with print_lock:
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# allow only one thread at a time to write to the console, otherwise
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# the output gets garbled, especially with ANSI codes.
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if interactive and scroll:
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# scroll the entire screen above the current line up by 1 line
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sys.stdout.write(
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"\033[s" # save cursor position
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"\033[S" # scroll up
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"\033[A" # cursor up
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"\033[L" # insert 1 line
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"\033[G"
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) # move cursor to column 1
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sys.stdout.write(s)
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if interactive and scroll:
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# restore cursor position
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sys.stdout.write("\033[u")
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else:
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sys.stdout.write("\n")
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# flush stdout manually...
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# because trying to open stdin/out unbuffered programmatically
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# works much too differently in Python 2/3
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sys.stdout.flush()
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def _error(text, scroll=False):
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_print("!!", text, scroll)
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def _continuous_read(handle, timeout=2000):
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while True:
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try:
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reply = hidapi.read(handle, 128, timeout)
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except OSError as e:
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_error("Read failed, aborting: " + str(e), True)
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break
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assert reply is not None
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if reply:
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_print(">>", reply, True)
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def _validate_input(line, hidpp=False):
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try:
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data = unhexlify(line.encode("ascii"))
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except Exception as e:
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_error("Invalid input: " + str(e))
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return None
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if hidpp:
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if len(data) < 4:
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_error("Invalid HID++ request: need at least 4 bytes")
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return None
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if data[:1] not in b"\x10\x11":
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_error("Invalid HID++ request: first byte must be 0x10 or 0x11")
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return None
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if data[1:2] not in b"\xff\x00\x01\x02\x03\x04\x05\x06\x07":
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_error("Invalid HID++ request: second byte must be 0xFF or one of 0x00..0x07")
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return None
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if data[:1] == b"\x10":
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if len(data) > 7:
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_error("Invalid HID++ request: maximum length of a 0x10 request is 7 bytes")
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return None
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while len(data) < 7:
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data = (data + b"\x00" * 7)[:7]
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elif data[:1] == b"\x11":
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if len(data) > 20:
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_error("Invalid HID++ request: maximum length of a 0x11 request is 20 bytes")
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return None
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while len(data) < 20:
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data = (data + b"\x00" * 20)[:20]
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return data
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def _open(args):
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def matchfn(bid, vid, pid, _a, _b):
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if vid == LOGITECH_VENDOR_ID:
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return {"vid": vid}
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device = args.device
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if args.hidpp and not device:
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for d in hidapi.enumerate(matchfn):
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if d.driver == "logitech-djreceiver":
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device = d.path
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break
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if not device:
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sys.exit("!! No HID++ receiver found.")
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if not device:
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sys.exit("!! Device path required.")
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print(".. Opening device", device)
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handle = hidapi.open_path(device)
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if not handle:
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sys.exit(f"!! Failed to open {device}, aborting.")
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print(
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".. Opened handle %r, vendor %r product %r serial %r."
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% (handle, hidapi.get_manufacturer(handle), hidapi.get_product(handle), hidapi.get_serial(handle))
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)
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if args.hidpp:
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if hidapi.get_manufacturer(handle) is not None and hidapi.get_manufacturer(handle) != b"Logitech":
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sys.exit("!! Only Logitech devices support the HID++ protocol.")
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print(".. HID++ validation enabled.")
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else:
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if hidapi.get_manufacturer(handle) == b"Logitech" and b"Receiver" in hidapi.get_product(handle):
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args.hidpp = True
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print(".. Logitech receiver detected, HID++ validation enabled.")
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return handle
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def _parse_arguments():
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arg_parser = argparse.ArgumentParser()
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arg_parser.add_argument("--history", help="history file (default ~/.hidconsole-history)")
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arg_parser.add_argument("--hidpp", action="store_true", help="ensure input data is a valid HID++ request")
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arg_parser.add_argument(
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"device",
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nargs="?",
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help="linux device to connect to (/dev/hidrawX); "
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"may be omitted if --hidpp is given, in which case it looks for the first Logitech receiver",
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)
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return arg_parser.parse_args()
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def main():
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args = _parse_arguments()
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handle = _open(args)
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if interactive:
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print(".. Press ^C/^D to exit, or type hex bytes to write to the device.")
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if args.history is None:
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args.history = os.path.join(os.path.expanduser("~"), ".hidconsole-history")
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try:
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readline.read_history_file(args.history)
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except Exception:
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# file may not exist yet
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pass
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try:
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t = Thread(target=_continuous_read, args=(handle,))
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t.daemon = True
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t.start()
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if interactive:
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# move the cursor at the bottom of the screen
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sys.stdout.write("\033[300B") # move cusor at most 300 lines down, don't scroll
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while t.is_alive():
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line = input(prompt)
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line = line.strip().replace(" ", "")
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# print ("line", line)
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if not line:
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continue
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data = _validate_input(line, args.hidpp)
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if data is None:
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continue
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_print("<<", data)
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hidapi.write(handle, data)
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# wait for some kind of reply
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if args.hidpp and not interactive:
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rlist, wlist, xlist = select([handle], [], [], 1)
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if data[1:2] == b"\xff":
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# the receiver will reply very fast, in a few milliseconds
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time.sleep(0.010)
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else:
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# the devices might reply quite slow
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time.sleep(0.700)
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except EOFError:
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if interactive:
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print("")
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else:
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time.sleep(1)
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finally:
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print(f".. Closing handle {handle!r}")
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hidapi.close(handle)
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if interactive:
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readline.write_history_file(args.history)
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if __name__ == "__main__":
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main()
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