From aedd3fa4e3a2de0ce6def86ec09c23104222a27a Mon Sep 17 00:00:00 2001 From: Zion Orent Date: Tue, 24 Mar 2015 11:01:14 -0400 Subject: [PATCH] mpr121: python example for mpr121 touch sensor Signed-off-by: Zion Orent Signed-off-by: Mihai Tudor Panu --- examples/python/mpr121.py | 73 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 examples/python/mpr121.py diff --git a/examples/python/mpr121.py b/examples/python/mpr121.py new file mode 100644 index 00000000..8e382629 --- /dev/null +++ b/examples/python/mpr121.py @@ -0,0 +1,73 @@ +#!/usr/bin/python +# Author: Zion Orent +# 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. + +import time, sys, signal, atexit +import pyupm_mpr121 as upmMpr121 + +I2C_BUS = upmMpr121.MPR121_I2C_BUS +DEFAULT_I2C_ADDR = upmMpr121.MPR121_DEFAULT_I2C_ADDR + +# Instantiate an MPR121 touch sensor on I2C +myTouchSensor = upmMpr121.MPR121(I2C_BUS, DEFAULT_I2C_ADDR) + + +## Exit handlers ## +# This stops python from printing a stacktrace when you hit control-C +def SIGINTHandler(signum, frame): + raise SystemExit + +# This function lets you run code on exit, +# including functions from myTouchSensor +def exitHandler(): + print "Exiting" + sys.exit(0) + +# Register exit handlers +atexit.register(exitHandler) +signal.signal(signal.SIGINT, SIGINTHandler) + + + +def printButtons(touchSensor): + buttonPressed = False + + outputStr = "Buttons Pressed: " + for i in range(12): + if (touchSensor.m_buttonStates & (1 << i)): + outputStr += (str(i) + " ") + buttonPressed = True + + if (not buttonPressed): + outputStr += "None" + + print outputStr + + if (touchSensor.m_overCurrentFault): + print "Over Current Fault detected!" + + +while(1): + myTouchSensor.readButtons() + printButtons(myTouchSensor) + + time.sleep(1)