upm/examples/c/rpr220-intr.c

85 lines
2.2 KiB
C
Raw Permalink Normal View History

/*
* 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 <signal.h>
#include <upm_utilities.h>
#include <rpr220.h>
int shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
volatile unsigned int counter = 0;
// Our interrupt handler
void rpr220_isr(void *arg)
{
counter++;
}
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// This example uses an interrupt handler to increment a counter
// Instantiate an RPR220 digital pin D2
// This was tested on the Grove IR Reflective Sensor
rpr220_context sensor = rpr220_init(2);
if (!sensor)
{
printf("rpr220_init() failed\n");
return 1;
}
// Here, we setup our Interupt Service Routine (ISR) to count
// 'black' pulses detected. We do not pass an argument to the
// interrupt handler (NULL).
rpr220_install_isr(sensor, rpr220_isr, NULL);
while (shouldRun)
{
printf("Counter: %d\n", counter);
upm_delay(1);
}
printf("Exiting...\n");
rpr220_close(sensor);
//! [Interesting]
return 0;
}