upm/examples/c/ldt0028.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

84 lines
1.9 KiB
C

/*
* Author: Noel Eck <noel.eck@intel.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 <signal.h>
#include "ldt0028.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 ldt0028 sensor on analog pin A0
ldt0028_context sensor = ldt0028_init(0);
if (!sensor)
{
printf("ldt0028_init() failed.\n");
return -1;
}
// Set the aref, scale, and offset
ldt0028_set_aref(sensor, 5.0);
ldt0028_set_scale(sensor, 1.0);
ldt0028_set_offset(sensor, -.1);
printf("aRef: %0.03f scale: %0.03f offset: %0.03f\n\n",
ldt0028_get_aref(sensor),
ldt0028_get_scale(sensor),
ldt0028_get_offset(sensor));
float normalized = 0.0;
float raw_volts = 0.0;
float volts = 0.0;
float norm_base = 0.1;
printf("Using normalized sensor output average == %f\n", norm_base);
// Every half a second, sample the sensor output
while (shouldRun)
{
ldt0028_get_normalized(sensor, &normalized);
ldt0028_get_raw_volts(sensor, &raw_volts);
ldt0028_get_volts(sensor, &volts);
if (normalized > norm_base)
{
printf("Detected vibration!\n");
printf("Normalized output: %0.03f, raw ldt0028 sensor output: %0.03f v "
"adjusted output: %0.03f v\n\n", normalized, raw_volts, volts);
}
upm_delay_ms(500);
}
//! [Interesting]
printf("Exiting\n");
ldt0028_close(sensor);
return 0;
}