133 lines
4.4 KiB
C
133 lines
4.4 KiB
C
/****************************************************************************
|
|
* examples/mlx90614/mlx90614_main.c
|
|
*
|
|
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
|
|
* Copyright (c) 2015-2017 Pololu Corporation.
|
|
* Author: Alan Carvalho de Assis <acassis@gmail.com>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/ioctl.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
|
|
#include <nuttx/sensors/ioctl.h>
|
|
#include <nuttx/sensors/mlx90614.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define CONFIG_EXAMPLES_MLX90614_DEVNAME "/dev/therm0"
|
|
|
|
/* If MLX90614 has two internal thermopile change it to 1 */
|
|
|
|
#define MLX90614_DUALTHERMOPILE 0
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
#define MILISEC_DELAY 1000
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* mlx90614_main
|
|
****************************************************************************/
|
|
|
|
#ifdef BUILD_MODULE
|
|
int main(int argc, FAR char *argv[])
|
|
#else
|
|
int mlx90614_main(int argc, char *argv[])
|
|
#endif
|
|
{
|
|
FAR struct mlx90614_temp_s temp;
|
|
float ta;
|
|
float tobj1;
|
|
#if MLX90614_DUALTHERMOPILE
|
|
float tobj2;
|
|
#endif
|
|
int fd;
|
|
int ret;
|
|
|
|
fd = open(CONFIG_EXAMPLES_MLX90614_DEVNAME, O_RDWR);
|
|
if (fd < 0)
|
|
{
|
|
fprintf(stderr, "ERROR: Failed to open %s: %d\n",
|
|
CONFIG_EXAMPLES_MLX90614_DEVNAME, errno);
|
|
return -1;
|
|
}
|
|
|
|
for (; ; )
|
|
{
|
|
/* Read new temperature from sensor */
|
|
|
|
ret = read(fd, &temp, sizeof(struct mlx90614_temp_s));
|
|
if (ret < 0)
|
|
{
|
|
fprintf(stderr, "Failed to read MLX90614, ERROR: %d\n", errno);
|
|
}
|
|
|
|
ta = (temp.ta * 0.02) - 273.15;
|
|
tobj1 = (temp.tobj1 * 0.02) - 273.15;
|
|
#if MLX90614_DUALTHERMOPILE
|
|
tobj2 = (temp.tobj2 * 0.02) - 273.15;
|
|
#endif
|
|
|
|
printf("Ambient Temperature = %.2f ", ta);
|
|
printf("| Object 1 Temperature = %.2f ", tobj1);
|
|
#if MLX90614_DUALTHERMOPILE
|
|
printf("| Object 2 Temperature = %.2f", tobj2);
|
|
#endif
|
|
printf("\n");
|
|
|
|
usleep(MILISEC_DELAY * 1000);
|
|
}
|
|
|
|
close(fd);
|
|
return 0;
|
|
}
|