All,

Attached is a port to python of the mythtv's dct-tuner code for setting
the channel of a Motorola DCT2XXX series set top box using the serial
port.  I have packaged the code that does the actual tuning as a
stand-alone python module that I install in $PYTHONLIB/site-packages,
but maybe it would make more sense to package it with the freevo
distribution.  The code relies on having the pyserial module installed
on the system.

In any case, I have attached the code, you can repackage it or throw it
out as you see fit.  Also attached is a freevo external tuner plugin,
dct2224serial.py,  that uses the code.  It should go in the tv/plugins
directory.  It is activated by adding a line like the following to
local_config.py:

plugin_external_tuner = plugin.activate("tv.dct2224serial")

If anybody who has a Motorola DCT2XXX series set top box wants more
detailed instructions, you can go here
http://www.dseifert.net/code/serialtuner/ for a write up.

Cheers,
Doug Seifert


Attachment: serialtuner.tar.gz
Description: GNU Zip compressed data

# -*- coding: iso-8859-1 -*-
# -----------------------------------------------------------------------
# dct2224serial.py - Send serial port commands to a Motorola DCT2224 set top 
box used by
#                       Comcast, among many others.  Requires the set top box 
and
#                       freevo box be connected via a serial cable and that the 
set top
#                       box's serial port is enabled.  Comcast in San Pedro, CA,
#                       seems to have this enabled on their set top boxes by 
default.
#                       Contact Doug Seifert (doug at dseifert dot net) for 
help.
# -----------------------------------------------------------------------
#
# Notes: This code uses the serialtuner module written by Doug Seifert
#        (doug at dseifert dot net)
#
# Todo:        
#
# -----------------------------------------------------------------------
# $Log$
# -----------------------------------------------------------------------
# Freevo - A Home Theater PC framework
# Copyright (C) 2003 Krister Lagerstrom, et al. 
# Please see the file freevo/Docs/CREDITS for a complete list of authors.
#
# 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 MER-
# CHANTABILITY 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.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# ----------------------------------------------------------------------- */


import plugin
import serialtuner.dct2224tuner

class PluginInterface(plugin.Plugin):

    def __init__(self):
        plugin.Plugin.__init__(self)
        self.tuner = serialtuner.dct2224tuner.DCT2224Tuner()
        plugin.register(self, 'EXTERNAL_TUNER')


    def setChannel(self, chan):
        print "changing channel to [",chan,"]"
        self.tuner.setChannel(chan)

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