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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>
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73
examples/c++/lcdks.cxx
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73
examples/c++/lcdks.cxx
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/*
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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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#include <unistd.h>
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#include <signal.h>
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#include <iostream>
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#include "lcdks.hpp"
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using namespace std;
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bool shouldRun = true;
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void sig_handler(int signo)
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{
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if (signo == SIGINT)
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shouldRun = false;
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}
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int main(int argc, char **argv)
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{
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signal(SIGINT, sig_handler);
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//! [Interesting]
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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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upm::LCDKS* lcd = new upm::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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while (shouldRun)
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{
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cout << "Button value: " << lcd->getKeyValue() << endl;
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sleep(1);
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}
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delete lcd;
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//! [Interesting]
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return 0;
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}
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