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63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
/*
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* Author: Keelan Lightfoot <keelanlightfoot@gmail.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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/*
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* On its own, a i2c switch doesn't really do anything, so the best I can do is
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* flips some ports on and off to demonstrate the capabilities of the library.
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*/
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var tca = require('jsupm_tca9548a');
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// Assumes default bus and address
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var sw = new tca.TCA9548A(tca.TCA9548A_I2C_BUS,
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tca.TCA9548A_DEFAULT_ADDR);
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// Start with clean slate
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sw.disableAllPorts();
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console.log("All ports disabled.");
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showAllPorts();
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// Enable port 4
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sw.setPort(4, tca.TCA9548A.ENABLED, tca.TCA9548A.EXCLUSIVE);
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console.log("Port 4 enabled with exclusive access.");
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showAllPorts();
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// Enable port 5
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sw.setPort(5, tca.TCA9548A.ENABLED, tca.TCA9548A.INCLUSIVE);
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console.log("Port 5 enabled with inclusive access.");
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showAllPorts();
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// Disable port 5
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sw.setPort(5, tca.TCA9548A.DISABLED, tca.TCA9548A.INCLUSIVE);
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console.log("Port 5 disabled with inclusive access.");
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showAllPorts();
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// Enable all ports
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sw.enableAllPorts();
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console.log("All ports enabled.");
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showAllPorts();
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// Clean up our mess, in an oblique way.
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sw.setPort(4, tca.TCA9548A.DISABLED, tca.TCA9548A.EXCLUSIVE);
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console.log("Port 4 disabled with exclusive access.");
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showAllPorts();
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// fin
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process.exit(0);
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function showAllPorts() {
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var ports = "";
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for (var i = 0; i<8; i++) {
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ports += (sw.getPort(i)?i:".");
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}
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console.log("Ports: "+ports);
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}
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