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This driver implements support for the DFRobot MMA7361 analog accelerometer. It supports 3 axes with a selectable 1.5G and 6G sensitivity. It is not really meant for navigation, but rather for uses such as orientation and freefall detection. Signed-off-by: Jon Trulson <jtrulson@ics.com>
74 lines
2.4 KiB
JavaScript
74 lines
2.4 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: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 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 sensorObj = require('jsupm_mma7361');
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// Instantiate a MMA7361 sensor on analog pins A0 (X), A1 (Y) A2
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// (Z), selftest pin on D2, sleep pin on D3 nd an analog reference
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// value of 5.0. The freefall pin and the range pin are unused
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// (-1).
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var sensor = new sensorObj.MMA7361(0, 1, 2, 2, 3, -1, -1, 5.0);
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var x = new sensorObj.new_floatp();
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var y = new sensorObj.new_floatp();
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var z = new sensorObj.new_floatp();
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// 1.5g (true = 6g)
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sensor.setRange(false);
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// Every 10th of a second, update and print values
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setInterval(function()
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{
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// update our values from the sensor
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sensor.update();
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sensor.getAcceleration(x, y, z);
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console.log("Accelerometer x: "
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+ sensorObj.floatp_value(x)
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+ " y: " + sensorObj.floatp_value(y)
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+ " z: " + sensorObj.floatp_value(z));
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sensor.getVolts(x, y, z);
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console.log("Volts x: "
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+ sensorObj.floatp_value(x)
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+ " y: " + sensorObj.floatp_value(y)
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+ " z: " + sensorObj.floatp_value(z));
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console.log();
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}, 100);
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// exit on ^C
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process.on('SIGINT', function()
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{
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sensor = null;
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sensorObj.cleanUp();
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sensorObj = null;
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console.log("Exiting.");
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process.exit(0);
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});
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