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TCA9548A : initial implementation

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merged with #413 from maleek

Signed-off-by: g-vidal <gerard.vidal@ens-lyon.fr>
Signed-off-by: Keelan Lightfoot <keelanlightfoot@gmail.com>
Signed-off-by: Jon Trulson <jtrulson@ics.com>
This commit is contained in:
g-vidal
2017-04-14 03:28:28 +02:00
committed by Jon Trulson
parent 1db6bd826a
commit 7688e5f230
9 changed files with 544 additions and 0 deletions
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examples/javascript/tca9548.js Normal file
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/*
* Author: Keelan Lightfoot <keelanlightfoot@gmail.com>
* Copyright (c) 2015 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.
*/
/*
* On its own, a i2c switch doesn't really do anything, so the best I can do is
* flips some ports on and off to demonstrate the capabilities of the library.
*/
var tca = require('jsupm_tca9548a');
// Assumes default bus and address
var sw = new tca.TCA9548A(tca.TCA9548A_I2C_BUS,
tca.TCA9548A_DEFAULT_ADDR);
// Start with clean slate
sw.disableAllPorts();
console.log("All ports disabled.");
showAllPorts();
// Enable port 4
sw.setPort(4, tca.TCA9548A.ENABLED, tca.TCA9548A.EXCLUSIVE);
console.log("Port 4 enabled with exclusive access.");
showAllPorts();
// Enable port 5
sw.setPort(5, tca.TCA9548A.ENABLED, tca.TCA9548A.INCLUSIVE);
console.log("Port 5 enabled with inclusive access.");
showAllPorts();
// Disable port 5
sw.setPort(5, tca.TCA9548A.DISABLED, tca.TCA9548A.INCLUSIVE);
console.log("Port 5 disabled with inclusive access.");
showAllPorts();
// Enable all ports
sw.enableAllPorts();
console.log("All ports enabled.");
showAllPorts();
// Clean up our mess, in an oblique way.
sw.setPort(4, tca.TCA9548A.DISABLED, tca.TCA9548A.EXCLUSIVE);
console.log("Port 4 disabled with exclusive access.");
showAllPorts();
// fin
process.exit(0);
function showAllPorts() {
var ports = "";
for (var i = 0; i<8; i++) {
ports += (sw.getPort(i)?i:".");
}
console.log("Ports: "+ports);
}