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Added example for Bosch BMP280 pressure sensor

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Filipe Cavalcanti 2023-05-05 21:48:15 -03:00 committed by Xiang Xiao
parent 02efb15b57
commit f60d23fdb9
4 changed files with 150 additions and 0 deletions
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30
examples/bmp280/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_BMP280
tristate "BMP280 Barometer sensor example"
default n
depends on SENSORS_BMP280
---help---
Enable the BMP280 example
if EXAMPLES_BMP280
config EXAMPLES_BMP280_PROGNAME
string "Program name"
default "bmp280"
---help---
This is the name of the program that will be used when the NSH ELF
program is installed.
config EXAMPLES_BMP280_PRIORITY
int "BMP280 task priority"
default 100
config EXAMPLES_BMP280_STACKSIZE
int "BMP280 stack size"
default DEFAULT_TASK_STACKSIZE
endif

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examples/bmp280/Make.defs Normal file
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############################################################################
# apps/examples/bmp280/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_BMP280),)
CONFIGURED_APPS += $(APPDIR)/examples/bmp280
endif

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examples/bmp280/Makefile Normal file
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############################################################################
# apps/examples/bmp280/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
# BMP280 Barometer sensor example built-in application info
PROGNAME = $(CONFIG_EXAMPLES_BMP280_PROGNAME)
PRIORITY = $(CONFIG_EXAMPLES_BMP280_PRIORITY)
STACKSIZE = $(CONFIG_EXAMPLES_BMP280_STACKSIZE)
MODULE = $(CONFIG_EXAMPLES_BMP280)
# BMP280 Barometer sensor example
MAINSRC = bmp280_main.c
include $(APPDIR)/Application.mk

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examples/bmp280/bmp280_main.c Normal file
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/****************************************************************************
* apps/examples/bmp280/bmp280_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 <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <nuttx/sensors/sensor.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* bmp280_main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
int fd;
int ret;
struct sensor_baro sensor_data;
fd = open("/dev/uorb/sensor_baro0", O_RDONLY | O_NONBLOCK);
if (fd < 0)
{
printf("Failed to open BMP280 sensor");
return EXIT_FAILURE;
}
ret = read(fd, &sensor_data, sizeof(sensor_data));
if (ret != sizeof(sensor_data))
{
perror("Could not read");
return EXIT_FAILURE;
}
printf("Absolute pressure [hPa] = %f\n", sensor_data.pressure);
printf("Temperature [C] = %f\n", sensor_data.temperature);
return EXIT_SUCCESS;
}