93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/****************************************************************************
|
|
* apps/examples/ltr308/ltr308_main.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <nuttx/sensors/ioctl.h>
|
|
#include <nuttx/sensors/sensor.h>
|
|
#include <nuttx/sensors/ltr308.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
#include <poll.h>
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* ltr308_main
|
|
****************************************************************************/
|
|
|
|
int main(int argc, FAR char *argv[])
|
|
{
|
|
struct ltr308_calibval calibval;
|
|
struct sensor_light light;
|
|
struct pollfd pfd;
|
|
int ret;
|
|
int fd;
|
|
|
|
fd = open("/dev/uorb/sensor_light0", O_RDONLY);
|
|
if (fd < 0)
|
|
{
|
|
perror("Could not open file");
|
|
return fd;
|
|
}
|
|
|
|
calibval.integration_time = 1;
|
|
calibval.measurement_rate = 2;
|
|
calibval.gain = 1;
|
|
ret = ioctl(fd, SNIOC_CALIBRATE, &calibval);
|
|
if (ret < 0)
|
|
{
|
|
perror("Could not calibrate sensor");
|
|
goto err_out;
|
|
}
|
|
|
|
memset(&pfd, 0, sizeof(struct pollfd));
|
|
pfd.fd = fd;
|
|
pfd.events = POLLIN;
|
|
ret = poll(&pfd, 1, -1);
|
|
if (ret < 0)
|
|
{
|
|
perror("Could not poll sensor");
|
|
goto err_out;
|
|
}
|
|
|
|
ret = read(fd, &light, sizeof(struct sensor_light));
|
|
if (ret < 0)
|
|
{
|
|
perror("Could not read from sensor");
|
|
goto err_out;
|
|
}
|
|
|
|
printf("timestamp: %llu, lux: %f\n", light.timestamp, light.light);
|
|
return OK;
|
|
|
|
err_out:
|
|
close(fd);
|
|
return ret;
|
|
}
|