# Control OpenOffice.org Impress using Chronos EZ430 buttons
# Code written and commented by Jose Damico jd.comment@gmail.com http://dcon.com.br/jd.comment/comment.php?id=691 
# in 2011Oct04 tested on Debian Squeeze 64bits
#
# Dependencies:
# 	- python >= 2.6
# 	- xdotool
# 	- openoffice.org or libreoffice3.4
#
# Code based on history described bellow:

# Get button data from Chronos watch.
# Taken from info posted at: http://e2e.ti.com/support/microcontrollers/msp43016-bit_ultra-low_power_mcus/f/166/t/32714.aspx
#
# posted here: http://pastebin.com/m5d1b7ced
# Written by Sean Brewer (seabre)
#
# modified by Oliver Smith 
# http://www.chemicaloliver.net
# seabre986@gmail.com
#

import os 		# used to run external commands
import re		# used for regex
import serial		# used for serial connection (read/write)
import array		# used for transformation array functions
from subprocess import Popen, PIPE
from time import sleep

# Function used to format Access Point initialization string
def startAccessPoint():
    return array.array('B', [0xFF, 0x07, 0x03]).tostring()

# Function used to format accelerometer/buttons request string
def accDataRequest():
    return array.array('B', [0xFF, 0x08, 0x07, 0x00, 0x00, 0x00, 0x00]).tostring()

# Usb device connection
ser = serial.Serial("/dev/ttyACM0",115200,timeout=1)

filePath	= "/path/to-your-presentation.odp"	         # file path of OpenOffice Impress presentation

# OpenOffice/LibreOffice Impress Command-Line execution

p=Popen(["openoffice.org", "-norestore", "-show", "-always_on_top", str(filePath)])	# used for OpenOffice
#p=Popen(["libreoffice3.4", "-norestore", "-show", "-always_on_top", str(filePath)])	# used for libreoffice


# Waits for Impress to open
sleep(10) 

# xdotool execution that gets the "screens" opened by OpenOffice Impress
# It returns an output string with "screens ids" separeted by \n

#(output, err) = Popen(["xdotool", "search", "--onlyvisible", "--class", "office"], stdout=PIPE).communicate()		# used for libreoffice
(output, err) = Popen(["xdotool", "search", "--onlyvisible", "--class", "OpenOffice.org"], stdout=PIPE).communicate() 	# used for OpenOffice


# Substitution of \n by blank spaces
output = re.sub("\n", " ", output)

print output

s1cmd 		= "" 							 # command to be executed when S1 button is pressed 
m1cmd 		= "xdotool " + " key" + " --window " + output + " Next"	 # command to be executed when M1 button is pressed
m2cmd 		= "xdotool " + " key" + " --window " + output + " Prior" # command to be executed when M2 button is pressed

# Start access point
ser.write(startAccessPoint())

s1times = 0
m1times = 0
m2times = 0

# Starts the read loop that will listen for all data from ez-430 chronos clock
while True:

    # Send request for acceleration/buttons data
    ser.write(accDataRequest())
    accel = ser.read(7)
    unknown = 1 # indicate that the received data is of unkown type

    # Interprets M1 button pressed
    if ord(accel[6]) == 18 and ord(accel[5]) == 7 and ord(accel[4]) == 6 and ord(accel[3]) == 255 and ord(accel[2]) == 0 and ord(accel[1]) == 0 and ord(accel[0]) == 0:

	M1 = 1

	# The ez-430 chronos clock buttons has a strong sensibility. An one second press, generates a lot of calls,
	# for that reason we need to increment these calls and just execute a command when at least 4 continous 
	# presses were done. Which means about an one second press. 
	m1times = m1times +1 

	if(m1times>4): 
		print "M1 pressed"
		os.popen(m1cmd) # executes the command for this button
		print str(m1cmd)
		m1times = 0

        unknown = 0

    if ord(accel[6]) == 34 and ord(accel[5]) == 7 and ord(accel[4]) == 6 and ord(accel[3]) == 255 and ord(accel[2]) == 0 and ord(accel[1]) == 0 and ord(accel[0]) == 0:

	M2 = 1
	m2times = m2times +1
	if(m2times>4): 
		print "M2 pressed"
		os.popen(m2cmd)
		print str(m2cmd)
		m2times = 0

        unknown = 0

    if ord(accel[6]) == 50 and ord(accel[5]) == 7 and ord(accel[4]) == 6 and ord(accel[3]) == 255 and ord(accel[2]) == 0 and ord(accel[1]) == 0 and ord(accel[0]) == 0:

	S1 = 1
	s1times = s1times +1

	if(s1times>4): 
		print "S1 pressed"
		os.popen(s1cmd)
		print str(s1cmd)
		s1times = 0

        unknown = 0

        continue

# Closes the serial connection
ser.close()