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4ea01180a1
The sainsmartks driver has been reimplemented in it's own, new C/C++ library: lcdks (LCD Keypad Shield). In addition, support for an optional backlight GPIO was added. This was tested with the SainsmartKS and DFRobot LCD Keypad Shields. Signed-off-by: Jon Trulson <jtrulson@ics.com>
56 lines
1.8 KiB
JavaScript
56 lines
1.8 KiB
JavaScript
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2017 Intel Corporation.
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*
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* The MIT License
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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 lcdksObj = require('jsupm_lcdks');
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// Instantiate a LCDKS (LCD Keypad Shield) using default pins
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// NOTE: The default pins do not include support for a gpio
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// controlled backlight. If you need one, you will need to specify
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// all neccessary pins to the constructor.
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var lcd = new lcdksObj.LCDKS();
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lcd.setCursor(0,0);
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lcd.write("LCDKS driver");
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lcd.setCursor(1,2);
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lcd.write("Hello World");
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// output current key value every second.
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setInterval(function()
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{
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console.log("Button value: " + lcd.getKeyValue());
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}, 1000);
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// exit on ^C
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process.on('SIGINT', function()
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{
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lcd = null;
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lcdksObj.cleanUp();
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lcdksObj = null;
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console.log("Exiting.");
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process.exit(0);
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});
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