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examples/bme680: Added test program for the BME680 sensor

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The program is an example on how to poll the sensor for data when
all its sub-sensors are enabled.

Signed-off-by: simonatoaca <simona.alexandra2000@gmail.com>
This commit is contained in:
simonatoaca 2023-08-18 13:48:41 +03:00 committed by Xiang Xiao
parent 00a093e108
commit 4739b18cb1
5 changed files with 296 additions and 0 deletions
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33
examples/bme680/CMakeLists.txt Normal file
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# ##############################################################################
# apps/examples/bme680/CMakeLists.txt
#
# 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.
#
# ##############################################################################
if(CONFIG_EXAMPLES_BME680)
nuttx_add_application(
NAME
${CONFIG_EXAMPLES_BME680_PROGNAME}
PRIORITY
${CONFIG_EXAMPLES_BME680_PRIORITY}
STACKSIZE
${CONFIG_EXAMPLES_BME680_STACKSIZE}
MODULE
${CONFIG_EXAMPLES_BME680}
SRCS
bme680_main.c)
endif()

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examples/bme680/Kconfig Normal file
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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
config EXAMPLES_BME680
tristate "BME680 sensor example"
default n
depends on SENSORS_BME680
---help---
Enable the BME680 example
if EXAMPLES_BME680
config EXAMPLES_BME680_PROGNAME
string "Program name"
default "bme680"
---help---
This is the name of the program that will be used when the NSH ELF
program is installed.
config EXAMPLES_BME680_PRIORITY
int "BME680 task priority"
default 100
config EXAMPLES_BME680_STACKSIZE
int "BME680 stack size"
default DEFAULT_TASK_STACKSIZE
endif

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examples/bme680/Make.defs Normal file
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############################################################################
# apps/examples/bme680/Make.defs
#
# 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.
#
############################################################################
ifneq ($(CONFIG_EXAMPLES_BME680),)
CONFIGURED_APPS += $(APPDIR)/examples/bme680
endif

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examples/bme680/Makefile Normal file
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############################################################################
# apps/examples/bme680/Makefile
#
# 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.
#
############################################################################
include $(APPDIR)/Make.defs
# BME680 Barometer sensor example built-in application info
PROGNAME = $(CONFIG_EXAMPLES_BME680_PROGNAME)
PRIORITY = $(CONFIG_EXAMPLES_BME680_PRIORITY)
STACKSIZE = $(CONFIG_EXAMPLES_BME680_STACKSIZE)
MODULE = $(CONFIG_EXAMPLES_BME680)
# BME680 Barometer sensor example
MAINSRC = bme680_main.c
include $(APPDIR)/Application.mk

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examples/bme680/bme680_main.c Normal file
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/****************************************************************************
* apps/examples/bme680/bme680_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/sensor.h>
#include <nuttx/sensors/bme680.h>
#include <stdio.h>
#include <fcntl.h>
#include <poll.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <time.h>
#define NB_LOWERHALFS 3
/* Structure used when polling the sub-sensors */
struct data
{
void *data_struct;
uint16_t data_size;
};
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* bme680_main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
int baro_fd;
int hum_fd;
int gas_fd;
uint16_t seconds;
int ret;
/* This example works when all of the sub-sensors of
* the BME680 are enabled.
*/
struct sensor_baro baro_data;
struct sensor_humi humi_data;
struct sensor_gas gas_data;
/* Open each lowerhalf file to be able to read the data.
* When the pressure measurement is deactivated, sensor_temp0 should
* be opened instead (to get the temperature measurement).
*/
baro_fd = open("/dev/uorb/sensor_baro0", O_RDONLY | O_NONBLOCK);
if (baro_fd < 0)
{
printf("Failed to open barometer lowerhalf.\n");
return -1;
}
hum_fd = open("/dev/uorb/sensor_humi0", O_RDONLY | O_NONBLOCK);
if (hum_fd < 0)
{
printf("Failed to open humidity sensor lowerhalf.\n");
return -1;
}
gas_fd = open("/dev/uorb/sensor_gas0", O_RDONLY | O_NONBLOCK);
if (gas_fd < 0)
{
printf("Failed to open gas lowerhalf.\n");
return -1;
}
/* Configure the sensor */
struct bme680_config_s config;
/* Set oversampling */
config.temp_os = BME680_OS_2X;
config.press_os = BME680_OS_16X;
config.filter_coef = BME680_FILTER_COEF3;
config.hum_os = BME680_OS_1X;
/* Set heater parameters */
config.target_temp = 300; /* degrees Celsius */
config.amb_temp = 30; /* degrees Celsius */
config.heater_duration = 100; /* milliseconds */
config.nb_conv = 0;
ret = ioctl(baro_fd, SNIOC_CALIBRATE, &config);
struct pollfd pfds[] = {
{.fd = baro_fd, .events = POLLIN},
{.fd = hum_fd, .events = POLLIN},
{.fd = gas_fd, .events = POLLIN}
};
struct data sensor_data[] = {
{.data_struct = &baro_data, .data_size = sizeof(struct sensor_baro)},
{.data_struct = &humi_data, .data_size = sizeof(struct sensor_humi)},
{.data_struct = &gas_data, .data_size = sizeof(struct sensor_gas)}
};
seconds = 5 * 60;
/* Wait ~5 minutes for the sensor to accomodate to the surroundings.
* The first measurements are not accurate. The longer the wait, the more
* accurate the results are.
*/
while (seconds > 0)
{
ret = poll(pfds, NB_LOWERHALFS, -1);
if (ret < 0)
{
perror("Could not poll sensor.");
return ret;
}
/* Go through lowerhalfs and read the data */
for (int i = 0; i < NB_LOWERHALFS; i++)
{
if (pfds[i].revents & POLLIN)
{
ret = read(pfds[i].fd, sensor_data[i].data_struct,
sensor_data[i].data_size);
if (ret != sensor_data[i].data_size)
{
perror("Could not read from sub-sensor.");
return ret;
}
}
}
seconds -= 3;
}
printf("Temperature [C] = %f\n"
"Pressure [hPa] = %f\n"
"Humidity [rH] = %f\n"
"Gas resistance [kOhm] = %f\n",
baro_data.temperature, baro_data.pressure,
humi_data.humidity, gas_data.gas_resistance);
close(baro_fd);
close(hum_fd);
close(gas_fd);
return 0;
}