adc121c021: python example and JS modification for adc121c021 analog/digital converter

Signed-off-by: Zion Orent <zorent@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

examples/javascript/adc121c021.js

@@ -33,7 +33,7 @@ var I2CAddr = I2C_ADC.ADC121C021_DEFAULT_I2C_ADDR;
 var myI2C_ADC = new I2C_ADC.ADC121C021(busID, I2CAddr);
 
 // get the data every 50 milliseconds
-setInterval(function()
+var myInterval = setInterval(function()
 {
 	var val = myI2C_ADC.value();
 	var voltsVal = myI2C_ADC.valueToVolts(val);
@@ -44,6 +44,10 @@ setInterval(function()
 // Print message when exiting
 process.on('SIGINT', function()
 {
+	clearInterval(myInterval);
+	myI2C_ADC = null;
+	I2C_ADC.cleanUp();
+	I2C_ADC = null;
 	console.log("Exiting...");
 	process.exit(0);
 });

examples/python/adc121c021.py

@@ -0,0 +1,55 @@
+#!/usr/bin/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.
+
+import time, sys, signal, atexit
+import pyupm_adc121c021 as upmAdc121c021
+
+# Instantiate an ADC121C021 on I2C bus 0
+busID = upmAdc121c021.ADC121C021_I2C_BUS
+I2CAddr = upmAdc121c021.ADC121C021_DEFAULT_I2C_ADDR
+
+myAnalogDigitalConv = upmAdc121c021.ADC121C021(busID, I2CAddr)
+
+
+## Exit handlers ##
+# This stops python from printing a stacktrace when you hit control-C
+def SIGINTHandler(signum, frame):
+	raise SystemExit
+
+# This lets you run code on exit,
+# including functions from myAnalogDigitalConv
+def exitHandler():
+	print "Exiting"
+	sys.exit(0)
+
+# Register exit handlers
+atexit.register(exitHandler)
+signal.signal(signal.SIGINT, SIGINTHandler)
+
+
+# get the data every 50 milliseconds
+while(1):
+	val = myAnalogDigitalConv.value()
+	voltsVal = myAnalogDigitalConv.valueToVolts(val)
+	print "ADC value: %s Volts = %s" % (val, voltsVal)
+	time.sleep(.05)