diff --git a/examples/bme680/CMakeLists.txt b/examples/bme680/CMakeLists.txt new file mode 100644 index 000000000..2da7f2a11 --- /dev/null +++ b/examples/bme680/CMakeLists.txt @@ -0,0 +1,33 @@ +# ############################################################################## +# 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() diff --git a/examples/bme680/Kconfig b/examples/bme680/Kconfig new file mode 100644 index 000000000..3b32f1844 --- /dev/null +++ b/examples/bme680/Kconfig @@ -0,0 +1,30 @@ +# +# 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 diff --git a/examples/bme680/Make.defs b/examples/bme680/Make.defs new file mode 100644 index 000000000..2578737a2 --- /dev/null +++ b/examples/bme680/Make.defs @@ -0,0 +1,23 @@ +############################################################################ +# 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 diff --git a/examples/bme680/Makefile b/examples/bme680/Makefile new file mode 100644 index 000000000..de2e631cf --- /dev/null +++ b/examples/bme680/Makefile @@ -0,0 +1,34 @@ +############################################################################ +# 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 diff --git a/examples/bme680/bme680_main.c b/examples/bme680/bme680_main.c new file mode 100644 index 000000000..da7905ad9 --- /dev/null +++ b/examples/bme680/bme680_main.c @@ -0,0 +1,176 @@ +/**************************************************************************** + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#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; +}