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72 lines
1.8 KiB
JavaScript
72 lines
1.8 KiB
JavaScript
/*
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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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* This program and the accompanying materials are made available under the
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* terms of the The MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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*/
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var MOSFETsensor = require("jsupm_cjq4435");
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var g_addnumBool = true;
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var g_cycleNum = 0.0;
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var g_cycleCount = 0;
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// Instantiate a CJQ4435 MOSFET on a PWM capable digital pin D3
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var myMOSFETsensor = new MOSFETsensor.CJQ4435(3);
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myMOSFETsensor.setPeriodMS(10);
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myMOSFETsensor.enable(true);
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// A note on timing:
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// In the C++ example, the system sleeps 11 times for 100 milliseconds
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// between each duty cycle. After reaching the last point of the cycle,
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// the system sleeps again for 1 second.
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// The sleeps are cumulative, so the system has slept for 2.1 seconds
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// sum total for each cycle.
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// setInterval and setTimeout make asynchronous function calls;
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// they aren't cumulative.
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// In order to approximate the behavior of the C++ example, we need
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// to call each iteration 2.1 seconds apart instead of 1 second apart.
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var myInterval = setInterval(function()
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{
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setDutyCycle();
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}, (1000 + (11*100)) );
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// We start with a duty cycle of 0.0 (off) and increment to 1.0 (on)
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// Then we take it back down,
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// starting with a duty cycle of 1.0 (on) and decrement to 0.0 (off)
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function setDutyCycle()
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{
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myMOSFETsensor.setDutyCycle(g_cycleNum);
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if (g_addnumBool)
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g_cycleNum += 0.1;
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else
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g_cycleNum -= 0.1;
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g_cycleCount++;
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if (g_cycleCount > 10)
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{
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g_addnumBool = !g_addnumBool;
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g_cycleCount = 0;
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}
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else
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setTimeout(setDutyCycle, 100);
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}
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// When exiting: clear interval and print exit message
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process.on('SIGINT', function()
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{
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clearInterval(myInterval);
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myMOSFETsensor = null;
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MOSFETsensor.cleanUp();
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MOSFETsensor = null;
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console.log("Exiting...");
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process.exit(0);
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});
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