upm/examples/python/at42qt1070.py

#!/usr/bin/env python
# Author: Zion Orent <zorent@ics.com>
# Copyright (c) 2015 Intel Corporation.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

from __future__ import print_function
import time, sys, signal, atexit
from upm import pyupm_at42qt1070 as upmAt42qt1070

def main():
    # functions
    def printButtons(touchObj):
        buttonPressed = False
        buttons = touchObj.getButtons()

        sys.stdout.write("Buttons Pressed: ")
        for i in range(7):
            if (buttons & (1 << i)):
                sys.stdout.write(str(i) + " ")
                buttonPressed = True

        if (not buttonPressed):
            sys.stdout.write("None")

        print(" ")

        if (touchObj.isCalibrating()):
            print("Calibration is occurring.")

        if (touchObj.isOverflowed()):
            print("Overflow was detected.")

    # Global code that runs on startup

    I2C_BUS = upmAt42qt1070.AT42QT1070_I2C_BUS
    DEFAULT_I2C_ADDR = upmAt42qt1070.AT42QT1070_DEFAULT_I2C_ADDR

    # Instantiate an AT42QT1070 on I2C bus 0
    myTouchSensor = upmAt42qt1070.AT42QT1070(I2C_BUS,
                                             DEFAULT_I2C_ADDR)

    # Exit handlers
    def SIGINTHandler(signum, frame):
        raise SystemExit

    def exitHandler():
        print("Exiting")
        sys.exit(0)

    # This function lets you run code on exit, including functions from myTouchSensor
    atexit.register(exitHandler)
    # This function stops python from printing a stacktrace when you hit control-C
    signal.signal(signal.SIGINT, SIGINTHandler)

    # Print the button being touched every 0.1 seconds
    while(1):
        myTouchSensor.updateState()
        printButtons(myTouchSensor)
        time.sleep(.1)

if __name__ == '__main__':
    main()