#!/usr/bin/python

#        fnordlicht serial client script
#
#    for additional information please
#    see http://koeln.ccc.de/prozesse/running/fnordlicht
#
# (c) by Alexander Neumann <alexander@bumpern.de>
#    and Lars Noschinski <lars@public.noschinski.de>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# For more information on the GPL, please go to:
# http://www.gnu.org/copyleft/gpl.html

from select import select
from os import fdopen
from sys import stdin
from tty import setcbreak

if __name__ == "__main__":
    # current keyboard command
    inputcmd = ""

    # open connection to the converter
    bus = open("/dev/ttyUSB0", "r+", 0)

    # disable line-buffering
    setcbreak(bus.fileno())
    setcbreak(stdin.fileno())

    # multiplex io with stdin
    inl = [bus, stdin]
    while 1:
        # select over all fds
        inf, ouf, erf = select(inl, [], [])

        # check every fd for a change
        if bus in inf:
            c = bus.read(1)
            if ord(c) < 32:
                print "received 0x%x" % ord(c)
            else:
                print "received '%0s'(0x%x)" % (c, ord(c))

        elif stdin in inf:
            inputcmd += stdin.read(1)

            if inputcmd == "-":
                print "-" * 76
            else:
                bus.write(inputcmd)

            inputcmd = ""