Jon Trulson 4ea01180a1 lcdks: renamed from sainsmartks, added backlight support
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>
2017-03-16 12:40:10 -06:00

56 lines
1.8 KiB
JavaScript

/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2017 Intel Corporation.
*
* The MIT License
*
* 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.
*/
var lcdksObj = require('jsupm_lcdks');
// Instantiate a LCDKS (LCD Keypad Shield) using default pins
// NOTE: The default pins do not include support for a gpio
// controlled backlight. If you need one, you will need to specify
// all neccessary pins to the constructor.
var lcd = new lcdksObj.LCDKS();
lcd.setCursor(0,0);
lcd.write("LCDKS driver");
lcd.setCursor(1,2);
lcd.write("Hello World");
// output current key value every second.
setInterval(function()
{
console.log("Button value: " + lcd.getKeyValue());
}, 1000);
// exit on ^C
process.on('SIGINT', function()
{
lcd = null;
lcdksObj.cleanUp();
lcdksObj = null;
console.log("Exiting.");
process.exit(0);
});