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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>
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
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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 <stdio.h>
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#include "upm_utilities.h"
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#include "lcdks.h"
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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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// LCD connection:
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// LCD RS pin to digital pin 8
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// LCD Enable pin to digital pin 9
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// LCD D4 pin to digital pin 4
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// LCD D5 pin to digital pin 5
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// LCD D6 pin to digital pin 6
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// LCD D7 pin to digital pin 7
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// Keypad analog pin 0
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// Backlight GPIO -1 (disabled)
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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, specify the correct pin
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// as the last argument instead of -1.
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lcdks_context lcd = lcdks_init(8, 9, 4, 5, 6, 7, 0, -1);
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if (!lcd)
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{
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printf("lcdks_init() failed.\n");
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return 1;
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}
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lcdks_set_cursor(lcd, 0, 0);
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lcdks_write(lcd, "LCDKS driver", 12);
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lcdks_set_cursor(lcd, 1, 2);
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lcdks_write(lcd, "Hello World", 11);
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// output current key value every second.
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while (shouldRun)
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{
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printf("Button value: %f\n", lcdks_get_key_value(lcd));
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upm_delay(1);
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}
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lcdks_close(lcd);
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//! [Interesting]
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return 0;
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}
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