upm/examples/c/rotaryencoder.c
Jon Trulson 07d0168a96 rotaryencoder: add C driver and example; FTI; C++ wraps C
Signed-off-by: Jon Trulson <jtrulson@ics.com>
2016-10-13 16:00:04 -06:00

70 lines
1.9 KiB
C

/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2015 Intel Corporation.
*
* 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 <stdio.h>
#include <signal.h>
#include "rotaryencoder.h"
#include "upm_utilities.h"
int shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a Grove Rotary Encoder, using signal pins D2 and D3
rotaryencoder_context sensor = rotaryencoder_init(2, 3);
if (!sensor)
{
printf("rotaryencoder_init() failed.\n");
return 1;
}
while (shouldRun)
{
printf("Position: %d\n", rotaryencoder_get_position(sensor));
upm_delay_ms(100);
}
printf("Exiting...\n");
rotaryencoder_close(sensor);
//! [Interesting]
return 0;
}