upm/examples/c/dfrorp.c
Jon Trulson e7c80217c2 C examples: move mraa_init() calls out of C examples and into C drivers.
Signed-off-by: Jon Trulson <jtrulson@ics.com>
2016-09-28 17:34:42 -06:00

88 lines
2.6 KiB
C

/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2016 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 "dfrorp.h"
#include "upm_utilities.h"
bool shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a DFRobot ORP sensor on analog pin A0 with an analog
// reference voltage of 5.0.
dfrorp_context sensor = dfrorp_init(0, 5.0);
if (!sensor)
{
printf("dfrorp_init() failed.\n");
return(1);
}
// To calibrate:
//
// Disconnect the sensor probe (but leave the sensor interface board
// connected). Then run one of the examples while holding down the
// 'calibrate' button on the device. Read the ORP value reported
// (it should be fairly small).
//
// This value is what you should supply to
// dfrorp_set_orp_cal_offset(). Then reconnect the probe to the
// interface board and you should be ready to go.
//
// DO NOT press the calibrate button on the interface board while
// the probe is attached or you can permanently damage the probe.
dfrorp_set_calibration_offset(sensor, 0.97);
// Every second, update and print values
while (shouldRun)
{
dfrorp_update(sensor);
printf("ORP = %f mV\n", dfrorp_get_orp(sensor));
upm_delay(1);
}
//! [Interesting]
printf("Exiting...\n");
dfrorp_close(sensor);
return 0;
}