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44b9ce2bdf
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>
99 lines
3.3 KiB
JavaScript
99 lines
3.3 KiB
JavaScript
/*jslint node:true, vars:true, bitwise:true, unparam:true */
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/*jshint unused:true */
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/*
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* Author: Zion Orent <zorent@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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var digitalAccelerometer = require('jsupm_mma7660');
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// Instantiate an MMA7660 on I2C bus 0
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var myDigitalAccelerometer = new digitalAccelerometer.MMA7660(
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digitalAccelerometer.MMA7660_I2C_BUS,
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digitalAccelerometer.MMA7660_DEFAULT_I2C_ADDR);
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// place device in standby mode so we can write registers
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myDigitalAccelerometer.setModeStandby();
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// enable 64 samples per second
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myDigitalAccelerometer.setSampleRate(digitalAccelerometer.MMA7660.AUTOSLEEP_64);
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// place device into active mode
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myDigitalAccelerometer.setModeActive();
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var x, y, z;
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x = digitalAccelerometer.new_intp();
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y = digitalAccelerometer.new_intp();
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z = digitalAccelerometer.new_intp();
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var ax, ay, az;
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ax = digitalAccelerometer.new_floatp();
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ay = digitalAccelerometer.new_floatp();
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az = digitalAccelerometer.new_floatp();
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var outputStr;
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var myInterval = setInterval(function()
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{
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myDigitalAccelerometer.getRawValues(x, y, z);
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outputStr = "Raw values: x = " + digitalAccelerometer.intp_value(x) +
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" y = " + digitalAccelerometer.intp_value(y) +
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" z = " + digitalAccelerometer.intp_value(z);
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console.log(outputStr);
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myDigitalAccelerometer.getAcceleration(ax, ay, az);
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outputStr = "Acceleration: x = "
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+ roundNum(digitalAccelerometer.floatp_value(ax), 6)
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+ "g y = " + roundNum(digitalAccelerometer.floatp_value(ay), 6)
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+ "g z = " + roundNum(digitalAccelerometer.floatp_value(az), 6) + "g";
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console.log(outputStr);
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}, 500);
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// round off output to match C example, which has 6 decimal places
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function roundNum(num, decimalPlaces)
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{
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var extraNum = (1 / (Math.pow(10, decimalPlaces) * 1000));
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return (Math.round((num + extraNum)
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* (Math.pow(10, decimalPlaces))) / Math.pow(10, decimalPlaces));
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}
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// When exiting: clear interval and print message
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process.on('SIGINT', function()
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{
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clearInterval(myInterval);
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// clean up memory
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digitalAccelerometer.delete_intp(x);
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digitalAccelerometer.delete_intp(y);
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digitalAccelerometer.delete_intp(z);
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digitalAccelerometer.delete_floatp(ax);
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digitalAccelerometer.delete_floatp(ay);
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digitalAccelerometer.delete_floatp(az);
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myDigitalAccelerometer.setModeStandby();
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console.log("Exiting...");
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process.exit(0);
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});
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