upm/examples/c/guvas12d.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

77 lines
1.6 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 <guvas12d.h>
bool shouldRun = true;
// analog voltage, usually 3.3 or 5.0
#define GUVAS12D_AREF 5.0
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// This was tested with the Grove UV Sensor module.
// It has a sensing range from between 240-370nm. It's strongest
// response is around 320-360nm.
// Instantiate a GUVAS12D on analog pin A0
guvas12d_context uv = guvas12d_init(0, GUVAS12D_AREF);
if (!uv)
{
printf("guvas12d_init() failed\n");
return 1;
}
// The higher the voltage the more intense the UV radiation.
while (shouldRun)
{
float volts = 0;
float intensity = 0;
if (guvas12d_get_volts(uv, &volts))
{
printf("guvas12d_get_volts() failed\n");
return 1;
}
if (guvas12d_get_intensity(uv, &intensity))
{
printf("guvas12d_get_intensity() failed\n");
return 1;
}
printf("Volts: %f, Intensity %f mW/m^2\n", volts, intensity);
upm_delay(1);
}
printf("Exiting\n");
guvas12d_close(uv);
//! [Interesting]
return 0;
}