upm/examples/c/lcdks.c

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/*
* 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.
*/
#include <unistd.h>
#include <signal.h>
#include <stdio.h>
#include "upm_utilities.h"
#include "lcdks.h"
bool shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main(int argc, char **argv)
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a LCDKS (LCD Keypad Shield) using default pins
// LCD connection:
// LCD RS pin to digital pin 8
// LCD Enable pin to digital pin 9
// LCD D4 pin to digital pin 4
// LCD D5 pin to digital pin 5
// LCD D6 pin to digital pin 6
// LCD D7 pin to digital pin 7
// Keypad analog pin 0
// Backlight GPIO -1 (disabled)
// NOTE: The default pins do not include support for a gpio
// controlled backlight. If you need one, specify the correct pin
// as the last argument instead of -1.
lcdks_context lcd = lcdks_init(8, 9, 4, 5, 6, 7, 0, -1);
if (!lcd)
{
printf("lcdks_init() failed.\n");
return 1;
}
lcdks_set_cursor(lcd, 0, 0);
lcdks_write(lcd, "LCDKS driver", 12);
lcdks_set_cursor(lcd, 1, 2);
lcdks_write(lcd, "Hello World", 11);
// output current key value every second.
while (shouldRun)
{
printf("Button value: %f\n", lcdks_get_key_value(lcd));
upm_delay(1);
}
lcdks_close(lcd);
//! [Interesting]
return 0;
}