upm/examples/c/otp538u.c
Mihai Tudor Panu 89d5de43e0 license: update to SPDX style license text throughout
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
2020-03-05 15:13:36 -08:00

69 lines
1.5 KiB
C

/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2016 Intel Corporation.
*
* This program and the accompanying materials are made available under the
* terms of the The MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
*/
#include <unistd.h>
#include <stdio.h>
#include <signal.h>
#include <upm_utilities.h>
#include <otp538u.h>
bool shouldRun = true;
// analog voltage, usually 3.3 or 5.0
#define OTP538U_AREF 5.0
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a OTP538U on analog pins A0 and A1
// A0 is used for the Ambient Temperature and A1 is used for the
// Object temperature.
otp538u_context temps = otp538u_init(0, 1, OTP538U_AREF);
// enable debugging if you would like
// otp538u_set_debug(temps, true);
// Output ambient and object temperatures
while (shouldRun)
{
float ambient = 0, object = 0;
if (otp538u_get_ambient_temperature(temps, &ambient))
printf("otp538u_get_ambient_temperature() failed\n");
else if (otp538u_get_object_temperature(temps, &object))
printf("otp538u_get_object_temperature() failed\n");
else
printf("Ambient temp: %f C, Object temp: %f C\n",
ambient, object);
printf("\n");
upm_delay(1);
}
printf("Exiting\n");
otp538u_close(temps);
//! [Interesting]
return 0;
}