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mpr121: Initial implementation

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This module implements support for the Grove I2C touch sensor
(mpr121).

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Zion Orent <zorent@ics.com>
Signed-off-by: John Van Drasek <john.r.van.drasek@intel.com>
This commit is contained in:
Jon Trulson
2014-12-09 13:44:01 -07:00
committed by John Van Drasek
parent 2eb0047643
commit 0c63500b36
8 changed files with 498 additions and 0 deletions
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examples/javascript/mpr121.js Normal file
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/*jslint node:true, vars:true, bitwise:true, unparam:true */
/*jshint unused:true */
/*global */
/*
* Author: Zion Orent <zorent@ics.com>
* Copyright (c) 2014 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.
*/
var touchSensor = require('jsupm_mpr121');
var myTouchSensor = new touchSensor.MPR121(touchSensor.MPR121_I2C_BUS, touchSensor.MPR121_DEFAULT_I2C_ADDR);
myTouchSensor.configAN3944();
setInterval(function()
{
myTouchSensor.readButtons();
printButtons(myTouchSensor);
}, 1000);
function printButtons(touchSensor)
{
var buttonPressed = false;
var outputStr = "Buttons Pressed: ";
for (var i=0; i<12; i++)
{
if (touchSensor.m_buttonStates & (1 << i))
{
outputStr += (i + " ");
buttonPressed = true;
}
}
if (!buttonPressed)
outputStr += "None";
console.log(outputStr);
if (touchSensor.m_overCurrentFault)
console.log("Over Current Fault detected!");
}
// Print message when exiting
process.on('SIGINT', function()
{
console.log("Exiting...");
process.exit(0);
});