sensor: add support for BME280
* Rename BMP280 to BME280 which is a superset for the former. * Autodetect device based on chip ID. * Implement humidity fetching and reading for BME280 * Rename sample BMP280 to BME280 Change-Id: I565c769a7011e7496c9f1cad861d5ee311839b4f Signed-off-by: Murtaza Alexandru <alexandru.murtaza@intel.com>
This commit is contained in:
Murtaza Alexandru
Anas Nashif
parent
261a448f33
commit
310ed1e2e9
12 changed files with 616 additions and 483 deletions
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@ -34,12 +34,12 @@ source "drivers/sensor/Kconfig.bma280"
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source "drivers/sensor/Kconfig.bmc150_magn"
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source "drivers/sensor/Kconfig.bmc150_magn"
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source "drivers/sensor/Kconfig.bme280"
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source "drivers/sensor/Kconfig.bmg160"
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source "drivers/sensor/Kconfig.bmg160"
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source "drivers/sensor/Kconfig.bmi160"
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source "drivers/sensor/Kconfig.bmi160"
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source "drivers/sensor/Kconfig.bmp280"
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source "drivers/sensor/Kconfig.dht"
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source "drivers/sensor/Kconfig.dht"
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source "drivers/sensor/Kconfig.hdc1008"
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source "drivers/sensor/Kconfig.hdc1008"
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180
drivers/sensor/Kconfig.bme280
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180
drivers/sensor/Kconfig.bme280
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@ -0,0 +1,180 @@
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# Kconfig.bmp280 - BMP280 temperature and pressure sensor configuration options
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#
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# Copyright (c) 2016 Intel Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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menuconfig BME280
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bool "BME280/BMP280 sensor"
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depends on SENSOR && I2C
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default n
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help
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Enable driver for BME280 I2C-based temperature and pressure sensor.
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config BME280_SYS_LOG_LEVEL
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int "BME280 Log level"
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depends on SYS_LOG && BME280
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default 0
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range 0 4
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help
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Sets log level for BMP280 driver.
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Levels are:
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0 OFF, do not write
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1 ERROR, only write SYS_LOG_ERR
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2 WARNING, write SYS_LOG_WRN in addition to previous level
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3 INFO, write SYS_LOG_INF in addition to previous levels
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4 DEBUG, write SYS_LOG_DBG in addition to previous levels
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config BME280_DEV_NAME
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string "BME280 device name"
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depends on BME280
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default "BME280"
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config BME280_INIT_PRIORITY
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int
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depends on BME280
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default 70
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prompt "Init priority"
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help
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Device driver initialization priority.
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choice
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prompt "BME280 I2C slave address"
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default BME280_I2C_ADDR_76
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depends on BME280
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help
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Specify the I2C slave address for the BME280.
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config BME280_I2C_ADDR_76
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bool
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prompt "0x76 (GND)"
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config BME280_I2C_ADDR_77
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bool
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prompt "0x77 (VCC)"
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endchoice
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config BME280_I2C_MASTER_DEV_NAME
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string "I2C master where BME280 is connected"
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depends on BME280
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default "I2C_0"
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help
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Specify the device name of the I2C master device to which BME280 is
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connected.
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menu "Attributes"
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depends on BME280
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choice
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prompt "BME280 temperature oversampling"
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depends on BME280
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default BME280_TEMP_OVER_2X
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help
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Select temperature oversampling for the BME280 sensor. Higher values
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lead to more accurate readings, but higher power consumption.
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config BME280_TEMP_OVER_1X
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bool "x1"
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config BME280_TEMP_OVER_2X
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bool "x2"
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config BME280_TEMP_OVER_4X
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bool "x4"
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config BME280_TEMP_OVER_8X
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bool "x8"
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config BME280_TEMP_OVER_16X
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bool "x16"
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endchoice
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choice
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prompt "BME280 pressure oversampling"
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depends on BME280
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default BME280_PRESS_OVER_16X
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help
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Select pressure oversampling for the BME280 sensor. Higher values
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lead to more accurate readings, but higher power consumption.
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config BME280_PRESS_OVER_1X
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bool "x1"
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config BME280_PRESS_OVER_2X
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bool "x2"
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config BME280_PRESS_OVER_4X
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bool "x4"
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config BME280_PRESS_OVER_8X
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bool "x8"
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config BME280_PRESS_OVER_16X
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bool "x16"
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endchoice
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choice
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prompt "BME280 humidity oversampling"
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depends on BME280
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default BME280_HUMIDITY_OVER_16X
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help
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Select humidity oversampling for the BME280 sensor. Higher values
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lead to more accurate readings, but higher power consumption.
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config BME280_HUMIDITY_OVER_1X
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bool "x1"
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config BME280_HUMIDITY_OVER_2X
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bool "x2"
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config BME280_HUMIDITY_OVER_4X
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bool "x4"
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config BME280_HUMIDITY_OVER_8X
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bool "x8"
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config BME280_HUMIDITY_OVER_16X
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bool "x16"
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endchoice
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choice
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prompt "BME280 standby time"
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depends on BME280
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default BME280_STANDBY_1000MS
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help
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Select standby time between measeurements for the BME280 sensor.
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Higher values lead to lower power consumption.
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config BME280_STANDBY_05MS
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bool "0.5ms"
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config BME280_STANDBY_62MS
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bool "62.5ms"
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config BME280_STANDBY_125MS
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bool "125ms"
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config BME280_STANDBY_250MS
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bool "250ms"
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config BME280_STANDBY_500MS
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bool "500ms"
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config BME280_STANDBY_1000MS
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bool "1000ms"
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config BME280_STANDBY_2000MS
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bool "2000ms BMP280 / 10ms BME280"
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config BME280_STANDBY_4000MS
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bool "4000ms BMP280 / 20ms BME280"
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endchoice
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choice
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prompt "BME280 filter coefficient"
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depends on BME280
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default BME280_FILTER_4
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help
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Select the filter coefficient for the BME280 sensor.
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config BME280_FILTER_OFF
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bool "filter off"
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config BME280_FILTER_2
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bool "2"
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config BME280_FILTER_4
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bool "4"
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config BME280_FILTER_8
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bool "8"
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config BME280_FILTER_16
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bool "16"
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endchoice
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endmenu
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@ -1,146 +0,0 @@
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# Kconfig.bmp280 - BMP280 temperature and pressure sensor configuration options
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#
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# Copyright (c) 2016 Intel Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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menuconfig BMP280
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bool "BMP280 temperature and pressure sensor"
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depends on SENSOR && I2C
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default n
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help
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Enable driver for BMP280 I2C-based temperature and pressure sensor.
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config BMP280_SYS_LOG_LEVEL
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int "BMP280 Log level"
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depends on SYS_LOG && BMP280
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default 0
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range 0 4
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help
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Sets log level for BMP280 driver.
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Levels are:
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0 OFF, do not write
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1 ERROR, only write SYS_LOG_ERR
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2 WARNING, write SYS_LOG_WRN in addition to previous level
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3 INFO, write SYS_LOG_INF in addition to previous levels
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4 DEBUG, write SYS_LOG_DBG in addition to previous levels
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config BMP280_DEV_NAME
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string "BMP280 device name"
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depends on BMP280
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default "BMP280"
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config BMP280_INIT_PRIORITY
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int
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depends on BMP280
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default 70
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prompt "Init priority"
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help
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Device driver initialization priority.
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config BMP280_I2C_ADDR
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hex "BMP280 I2C slave address"
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depends on BMP280
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default 0x76
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help
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Specify the I2C slave address for the BMP280.
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config BMP280_I2C_MASTER_DEV_NAME
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string "I2C master where BMP280 is connected"
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depends on BMP280
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default "I2C_0"
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help
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Specify the device name of the I2C master device to which BMP280 is
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connected.
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choice
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prompt "BMP280 pressure oversampling"
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depends on BMP280
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default BMP280_PRESS_OVER_16X
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help
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Select pressure oversampling for the BMP280 sensor. Higher values
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lead to more accurate readings, but higher power consumption.
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config BMP280_PRESS_OVER_1X
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bool "x1"
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config BMP280_PRESS_OVER_2X
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bool "x2"
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config BMP280_PRESS_OVER_4X
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bool "x4"
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config BMP280_PRESS_OVER_8X
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bool "x8"
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config BMP280_PRESS_OVER_16X
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bool "x16"
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endchoice
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choice
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prompt "BMP280 temperature oversampling"
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depends on BMP280
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default BMP280_TEMP_OVER_2X
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help
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Select temperature oversampling for the BMP280 sensor. Higher values
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lead to more accurate readings, but higher power consumption.
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config BMP280_TEMP_OVER_1X
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bool "x1"
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config BMP280_TEMP_OVER_2X
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bool "x2"
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config BMP280_TEMP_OVER_4X
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bool "x4"
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config BMP280_TEMP_OVER_8X
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bool "x8"
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config BMP280_TEMP_OVER_16X
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bool "x16"
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endchoice
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choice
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prompt "BMP280 standby time"
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depends on BMP280
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default BMP280_STANDBY_1000MS
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help
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Select standby time between measeurements for the BMP280 sensor.
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Higher values lead to lower power consumption.
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config BMP280_STANDBY_05MS
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bool "0.5ms"
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config BMP280_STANDBY_62MS
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bool "62.5ms"
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config BMP280_STANDBY_125MS
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bool "125ms"
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config BMP280_STANDBY_250MS
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bool "250ms"
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config BMP280_STANDBY_500MS
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bool "500ms"
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config BMP280_STANDBY_1000MS
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bool "1000ms"
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config BMP280_STANDBY_2000MS
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bool "2000ms"
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config BMP280_STANDBY_4000MS
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bool "4000ms"
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endchoice
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choice
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prompt "BMP280 filter coefficient"
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depends on BMP280
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default BMP280_FILTER_4
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help
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Select the filter coefficient for the BMP280 sensor.
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config BMP280_FILTER_OFF
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bool "filter off"
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config BMP280_FILTER_2
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bool "2"
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config BMP280_FILTER_4
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bool "4"
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config BMP280_FILTER_8
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bool "8"
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config BMP280_FILTER_16
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bool "16"
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endchoice
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@ -4,11 +4,11 @@ obj-$(CONFIG_BMA280) += sensor_bma280.o
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obj-$(CONFIG_BMA280_TRIGGER) += sensor_bma280_trigger.o
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obj-$(CONFIG_BMA280_TRIGGER) += sensor_bma280_trigger.o
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obj-$(CONFIG_BMC150_MAGN) += sensor_bmc150_magn.o
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obj-$(CONFIG_BMC150_MAGN) += sensor_bmc150_magn.o
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obj-$(CONFIG_BMC150_MAGN_TRIGGER_DRDY) += sensor_bmc150_magn_trigger.o
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obj-$(CONFIG_BMC150_MAGN_TRIGGER_DRDY) += sensor_bmc150_magn_trigger.o
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obj-$(CONFIG_BME280) += sensor_bme280.o
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obj-$(CONFIG_BMG160) += sensor_bmg160.o
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obj-$(CONFIG_BMG160) += sensor_bmg160.o
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obj-$(CONFIG_BMG160_TRIGGER) += sensor_bmg160_trigger.o
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obj-$(CONFIG_BMG160_TRIGGER) += sensor_bmg160_trigger.o
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obj-$(CONFIG_BMI160) += sensor_bmi160.o
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obj-$(CONFIG_BMI160) += sensor_bmi160.o
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obj-$(CONFIG_BMI160_TRIGGER) += sensor_bmi160_trigger.o
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obj-$(CONFIG_BMI160_TRIGGER) += sensor_bmi160_trigger.o
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obj-$(CONFIG_BMP280) += sensor_bmp280.o
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obj-$(CONFIG_DHT) += sensor_dht.o
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obj-$(CONFIG_DHT) += sensor_dht.o
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obj-$(CONFIG_HDC1008) += sensor_hdc1008.o
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obj-$(CONFIG_HDC1008) += sensor_hdc1008.o
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obj-$(CONFIG_ISL29035) += sensor_isl29035.o
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obj-$(CONFIG_ISL29035) += sensor_isl29035.o
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269
drivers/sensor/sensor_bme280.c
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269
drivers/sensor/sensor_bme280.c
Normal file
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@ -0,0 +1,269 @@
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/* sensor_bmp280.c - Driver for Bosch BMP280 temperature and pressure sensor */
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/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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||||||
|
#include <nanokernel.h>
|
||||||
|
#include <i2c.h>
|
||||||
|
#include <sensor.h>
|
||||||
|
#include <init.h>
|
||||||
|
#include <gpio.h>
|
||||||
|
#include <misc/byteorder.h>
|
||||||
|
#include <misc/__assert.h>
|
||||||
|
|
||||||
|
#include "sensor_bme280.h"
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Compensation code taken from BME280 datasheet, Section 4.2.3
|
||||||
|
* "Compensation formula".
|
||||||
|
*/
|
||||||
|
static void bme280_compensate_temp(struct bme280_data *data, int32_t adc_temp)
|
||||||
|
{
|
||||||
|
int32_t var1, var2;
|
||||||
|
|
||||||
|
var1 = (((adc_temp >> 3) - ((int32_t)data->dig_t1 << 1)) *
|
||||||
|
((int32_t)data->dig_t2)) >> 11;
|
||||||
|
var2 = (((((adc_temp >> 4) - ((int32_t)data->dig_t1)) *
|
||||||
|
((adc_temp >> 4) - ((int32_t)data->dig_t1))) >> 12) *
|
||||||
|
((int32_t)data->dig_t3)) >> 14;
|
||||||
|
|
||||||
|
data->t_fine = var1 + var2;
|
||||||
|
data->comp_temp = (data->t_fine * 5 + 128) >> 8;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bme280_compensate_press(struct bme280_data *data, int32_t adc_press)
|
||||||
|
{
|
||||||
|
int64_t var1, var2, p;
|
||||||
|
|
||||||
|
var1 = ((int64_t)data->t_fine) - 128000;
|
||||||
|
var2 = var1 * var1 * (int64_t)data->dig_p6;
|
||||||
|
var2 = var2 + ((var1 * (int64_t)data->dig_p5) << 17);
|
||||||
|
var2 = var2 + (((int64_t)data->dig_p4) << 35);
|
||||||
|
var1 = ((var1 * var1 * (int64_t)data->dig_p3) >> 8) +
|
||||||
|
((var1 * (int64_t)data->dig_p2) << 12);
|
||||||
|
var1 = (((((int64_t)1) << 47) + var1)) * ((int64_t)data->dig_p1) >> 33;
|
||||||
|
|
||||||
|
/* Avoid exception caused by division by zero. */
|
||||||
|
if (var1 == 0) {
|
||||||
|
data->comp_press = 0;
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
p = 1048576 - adc_press;
|
||||||
|
p = (((p << 31) - var2) * 3125) / var1;
|
||||||
|
var1 = (((int64_t)data->dig_p9) * (p >> 13) * (p >> 13)) >> 25;
|
||||||
|
var2 = (((int64_t)data->dig_p8) * p) >> 19;
|
||||||
|
p = ((p + var1 + var2) >> 8) + (((int64_t)data->dig_p7) << 4);
|
||||||
|
|
||||||
|
data->comp_press = (uint32_t)p;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bme280_compensate_humidity(struct bme280_data *data,
|
||||||
|
int32_t adc_humidity)
|
||||||
|
{
|
||||||
|
int32_t h;
|
||||||
|
|
||||||
|
h = (data->t_fine - ((int32_t)76800));
|
||||||
|
h = ((((adc_humidity << 14) - (((int32_t)data->dig_h4) << 20) -
|
||||||
|
(((int32_t)data->dig_h5) * h)) + ((int32_t)16384)) >> 15) *
|
||||||
|
(((((((h * ((int32_t)data->dig_h6)) >> 10) * (((h *
|
||||||
|
((int32_t)data->dig_h3)) >> 11) + ((int32_t)32768))) >> 10) +
|
||||||
|
((int32_t)2097152)) * ((int32_t)data->dig_h2) + 8192) >> 14);
|
||||||
|
h = (h - (((((h >> 15) * (h >> 15)) >> 7) *
|
||||||
|
((int32_t)data->dig_h1)) >> 4));
|
||||||
|
h = (h > 419430400 ? 419430400 : h);
|
||||||
|
|
||||||
|
data->comp_humidity = (uint32_t)(h >> 12);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bme280_sample_fetch(struct device *dev, enum sensor_channel chan)
|
||||||
|
{
|
||||||
|
struct bme280_data *data = dev->driver_data;
|
||||||
|
uint8_t buf[8];
|
||||||
|
int32_t adc_press, adc_temp, adc_humidity;
|
||||||
|
int size = 6;
|
||||||
|
|
||||||
|
__ASSERT(chan == SENSOR_CHAN_ALL);
|
||||||
|
|
||||||
|
if (data->chip_id == BME280_CHIP_ID) {
|
||||||
|
size = 8;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (i2c_burst_read(data->i2c_master, data->i2c_slave_addr,
|
||||||
|
BME280_REG_PRESS_MSB, buf, size) < 0) {
|
||||||
|
return -EIO;
|
||||||
|
}
|
||||||
|
|
||||||
|
adc_press = (buf[0] << 12) | (buf[1] << 4) | (buf[2] >> 4);
|
||||||
|
adc_temp = (buf[3] << 12) | (buf[4] << 4) | (buf[5] >> 4);
|
||||||
|
|
||||||
|
bme280_compensate_temp(data, adc_temp);
|
||||||
|
bme280_compensate_press(data, adc_press);
|
||||||
|
|
||||||
|
if (data->chip_id == BME280_CHIP_ID) {
|
||||||
|
adc_humidity = (buf[6] << 8) | buf[7];
|
||||||
|
bme280_compensate_humidity(data, adc_humidity);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bme280_channel_get(struct device *dev,
|
||||||
|
enum sensor_channel chan,
|
||||||
|
struct sensor_value *val)
|
||||||
|
{
|
||||||
|
struct bme280_data *data = dev->driver_data;
|
||||||
|
|
||||||
|
switch (chan) {
|
||||||
|
case SENSOR_CHAN_TEMP:
|
||||||
|
/*
|
||||||
|
* data->comp_temp has a resolution of 0.01 degC. So
|
||||||
|
* 5123 equals 51.23 degC.
|
||||||
|
*/
|
||||||
|
val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;
|
||||||
|
val->val1 = data->comp_temp / 100;
|
||||||
|
val->val2 = data->comp_temp % 100 * 10000;
|
||||||
|
break;
|
||||||
|
case SENSOR_CHAN_PRESS:
|
||||||
|
/*
|
||||||
|
* data->comp_press has 24 integer bits and 8
|
||||||
|
* fractional. Output value of 24674867 represents
|
||||||
|
* 24674867/256 = 96386.2 Pa = 963.862 hPa
|
||||||
|
*/
|
||||||
|
val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;
|
||||||
|
val->val1 = (data->comp_press >> 8) / 1000;
|
||||||
|
val->val2 = (data->comp_press >> 8) % 1000 * 1000 +
|
||||||
|
(((data->comp_press & 0xff) * 1000) >> 8);
|
||||||
|
break;
|
||||||
|
case SENSOR_CHAN_HUMIDITY:
|
||||||
|
/*
|
||||||
|
* data->comp_humidity has 22 integer bits and 10
|
||||||
|
* fractional. Output value of 47445 represents
|
||||||
|
* 47445/1024 = 46.333 %RH
|
||||||
|
*/
|
||||||
|
val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;
|
||||||
|
val->val1 = (data->comp_humidity >> 10);
|
||||||
|
val->val2 = (((data->comp_humidity & 0x3ff) * 1000 * 1000) >> 10);
|
||||||
|
val->val1 = val->val1 * 1000 + (val->val2 * 1000) / 1000000;
|
||||||
|
val->val2 = (val->val2 * 1000) % 1000000;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct sensor_driver_api bme280_api_funcs = {
|
||||||
|
.sample_fetch = bme280_sample_fetch,
|
||||||
|
.channel_get = bme280_channel_get,
|
||||||
|
};
|
||||||
|
|
||||||
|
static void bme280_read_compensation(struct bme280_data *data)
|
||||||
|
{
|
||||||
|
uint16_t buf[12];
|
||||||
|
uint8_t hbuf[7];
|
||||||
|
|
||||||
|
i2c_burst_read(data->i2c_master, data->i2c_slave_addr,
|
||||||
|
BME280_REG_COMP_START, (uint8_t *)buf, sizeof(buf));
|
||||||
|
|
||||||
|
data->dig_t1 = sys_le16_to_cpu(buf[0]);
|
||||||
|
data->dig_t2 = sys_le16_to_cpu(buf[1]);
|
||||||
|
data->dig_t3 = sys_le16_to_cpu(buf[2]);
|
||||||
|
|
||||||
|
data->dig_p1 = sys_le16_to_cpu(buf[3]);
|
||||||
|
data->dig_p2 = sys_le16_to_cpu(buf[4]);
|
||||||
|
data->dig_p4 = sys_le16_to_cpu(buf[5]);
|
||||||
|
data->dig_p3 = sys_le16_to_cpu(buf[6]);
|
||||||
|
data->dig_p5 = sys_le16_to_cpu(buf[7]);
|
||||||
|
data->dig_p6 = sys_le16_to_cpu(buf[8]);
|
||||||
|
data->dig_p7 = sys_le16_to_cpu(buf[9]);
|
||||||
|
data->dig_p8 = sys_le16_to_cpu(buf[10]);
|
||||||
|
data->dig_p9 = sys_le16_to_cpu(buf[11]);
|
||||||
|
|
||||||
|
if (data->chip_id == BME280_CHIP_ID) {
|
||||||
|
i2c_reg_read_byte(data->i2c_master, data->i2c_slave_addr,
|
||||||
|
BME280_REG_HUM_COMP_PART1, &data->dig_h1);
|
||||||
|
|
||||||
|
i2c_burst_read(data->i2c_master, data->i2c_slave_addr,
|
||||||
|
BME280_REG_HUM_COMP_PART2, hbuf, 7);
|
||||||
|
|
||||||
|
data->dig_h2 = (hbuf[1] << 8) | hbuf[0];
|
||||||
|
data->dig_h3 = hbuf[2];
|
||||||
|
data->dig_h4 = (hbuf[3] << 4) | (hbuf[4] & 0x0F);
|
||||||
|
data->dig_h5 = ((hbuf[4] >> 4) & 0x0F) | (hbuf[5] << 4);
|
||||||
|
data->dig_h6 = hbuf[6];
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bme280_chip_init(struct device *dev)
|
||||||
|
{
|
||||||
|
struct bme280_data *data = (struct bme280_data *) dev->driver_data;
|
||||||
|
|
||||||
|
i2c_reg_read_byte(data->i2c_master, data->i2c_slave_addr,
|
||||||
|
BME280_REG_ID, &data->chip_id);
|
||||||
|
|
||||||
|
if (data->chip_id == BME280_CHIP_ID) {
|
||||||
|
SYS_LOG_DBG("BME280 chip detected");
|
||||||
|
} else if (data->chip_id == BMP280_CHIP_ID_MP ||
|
||||||
|
data->chip_id == BMP280_CHIP_ID_SAMPLE_1) {
|
||||||
|
SYS_LOG_DBG("BMP280 chip detected");
|
||||||
|
} else {
|
||||||
|
SYS_LOG_DBG("bad chip id 0x%x", data->chip_id);
|
||||||
|
return -ENOTSUP;
|
||||||
|
}
|
||||||
|
|
||||||
|
bme280_read_compensation(data);
|
||||||
|
|
||||||
|
if (data->chip_id == BME280_CHIP_ID) {
|
||||||
|
i2c_reg_write_byte(data->i2c_master, data->i2c_slave_addr,
|
||||||
|
BME280_REG_CTRL_HUM, BME280_HUMIDITY_OVER);
|
||||||
|
}
|
||||||
|
|
||||||
|
i2c_reg_write_byte(data->i2c_master, data->i2c_slave_addr,
|
||||||
|
BME280_REG_CTRL_MEAS, BME280_CTRL_MEAS_VAL);
|
||||||
|
i2c_reg_write_byte(data->i2c_master, data->i2c_slave_addr,
|
||||||
|
BME280_REG_CONFIG, BME280_CONFIG_VAL);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int bme280_init(struct device *dev)
|
||||||
|
{
|
||||||
|
struct bme280_data *data = dev->driver_data;
|
||||||
|
|
||||||
|
data->i2c_master = device_get_binding(CONFIG_BME280_I2C_MASTER_DEV_NAME);
|
||||||
|
if (!data->i2c_master) {
|
||||||
|
SYS_LOG_DBG("i2c master not found: %s",
|
||||||
|
CONFIG_BME280_I2C_MASTER_DEV_NAME);
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
data->i2c_slave_addr = BME280_I2C_ADDR;
|
||||||
|
|
||||||
|
if (bme280_chip_init(dev) < 0) {
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
dev->driver_api = &bme280_api_funcs;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct bme280_data bme280_data;
|
||||||
|
|
||||||
|
DEVICE_INIT(bme280, CONFIG_BME280_DEV_NAME, bme280_init, &bme280_data,
|
||||||
|
NULL, SECONDARY, CONFIG_BME280_INIT_PRIORITY);
|
||||||
156
drivers/sensor/sensor_bme280.h
Normal file
156
drivers/sensor/sensor_bme280.h
Normal file
|
|
@ -0,0 +1,156 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2016 Intel Corporation
|
||||||
|
*
|
||||||
|
* Licensed 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __SENSOR_BME280_H__
|
||||||
|
#define __SENSOR_BME280_H__
|
||||||
|
|
||||||
|
#include <stdint.h>
|
||||||
|
#include <device.h>
|
||||||
|
|
||||||
|
#define BME280_REG_PRESS_MSB 0xF7
|
||||||
|
#define BME280_REG_COMP_START 0x88
|
||||||
|
#define BME280_REG_HUM_COMP_PART1 0xA1
|
||||||
|
#define BME280_REG_HUM_COMP_PART2 0xE1
|
||||||
|
#define BME280_REG_ID 0xD0
|
||||||
|
#define BME280_REG_CONFIG 0xF5
|
||||||
|
#define BME280_REG_CTRL_MEAS 0xF4
|
||||||
|
#define BME280_REG_CTRL_HUM 0xF2
|
||||||
|
|
||||||
|
#define BMP280_CHIP_ID_SAMPLE_1 0x56
|
||||||
|
#define BMP280_CHIP_ID_SAMPLE_2 0x57
|
||||||
|
#define BMP280_CHIP_ID_MP 0x58
|
||||||
|
#define BME280_CHIP_ID 0x60
|
||||||
|
#define BME280_MODE_NORMAL 0x03
|
||||||
|
#define BME280_SPI_3W_DISABLE 0x00
|
||||||
|
|
||||||
|
#if defined CONFIG_BME280_TEMP_OVER_1X
|
||||||
|
#define BME280_TEMP_OVER (1 << 5)
|
||||||
|
#elif defined CONFIG_BME280_TEMP_OVER_2X
|
||||||
|
#define BME280_TEMP_OVER (2 << 5)
|
||||||
|
#elif defined CONFIG_BME280_TEMP_OVER_4X
|
||||||
|
#define BME280_TEMP_OVER (3 << 5)
|
||||||
|
#elif defined CONFIG_BME280_TEMP_OVER_8X
|
||||||
|
#define BME280_TEMP_OVER (4 << 5)
|
||||||
|
#elif defined CONFIG_BME280_TEMP_OVER_16X
|
||||||
|
#define BME280_TEMP_OVER (5 << 5)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined CONFIG_BME280_PRESS_OVER_1X
|
||||||
|
#define BME280_PRESS_OVER (1 << 2)
|
||||||
|
#elif defined CONFIG_BME280_PRESS_OVER_2X
|
||||||
|
#define BME280_PRESS_OVER (2 << 2)
|
||||||
|
#elif defined CONFIG_BME280_PRESS_OVER_4X
|
||||||
|
#define BME280_PRESS_OVER (3 << 2)
|
||||||
|
#elif defined CONFIG_BME280_PRESS_OVER_8X
|
||||||
|
#define BME280_PRESS_OVER (4 << 2)
|
||||||
|
#elif defined CONFIG_BME280_PRESS_OVER_16X
|
||||||
|
#define BME280_PRESS_OVER (5 << 2)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined CONFIG_BME280_HUMIDITY_OVER_1X
|
||||||
|
#define BME280_HUMIDITY_OVER 1
|
||||||
|
#elif defined CONFIG_BME280_HUMIDITY_OVER_2X
|
||||||
|
#define BME280_HUMIDITY_OVER 2
|
||||||
|
#elif defined CONFIG_BME280_HUMIDITY_OVER_4X
|
||||||
|
#define BME280_HUMIDITY_OVER 3
|
||||||
|
#elif defined CONFIG_BME280_HUMIDITY_OVER_8X
|
||||||
|
#define BME280_HUMIDITY_OVER 4
|
||||||
|
#elif defined CONFIG_BME280_HUMIDITY_OVER_16X
|
||||||
|
#define BME280_HUMIDITY_OVER 5
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined CONFIG_BME280_STANDBY_05MS
|
||||||
|
#define BME280_STANDBY 0
|
||||||
|
#elif defined CONFIG_BME280_STANDBY_62MS
|
||||||
|
#define BME280_STANDBY (1 << 5)
|
||||||
|
#elif defined CONFIG_BME280_STANDBY_125MS
|
||||||
|
#define BME280_STANDBY (2 << 5)
|
||||||
|
#elif defined CONFIG_BME280_STANDBY_250MS
|
||||||
|
#define BME280_STANDBY (3 << 5)
|
||||||
|
#elif defined CONFIG_BME280_STANDBY_500MS
|
||||||
|
#define BME280_STANDBY (4 << 5)
|
||||||
|
#elif defined CONFIG_BME280_STANDBY_1000MS
|
||||||
|
#define BME280_STANDBY (5 << 5)
|
||||||
|
#elif defined CONFIG_BME280_STANDBY_2000MS
|
||||||
|
#define BME280_STANDBY (6 << 5)
|
||||||
|
#elif defined CONFIG_BME280_STANDBY_4000MS
|
||||||
|
#define BME280_STANDBY (7 << 5)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined CONFIG_BME280_FILTER_OFF
|
||||||
|
#define BME280_FILTER 0
|
||||||
|
#elif defined CONFIG_BME280_FILTER_2
|
||||||
|
#define BME280_FILTER (1 << 2)
|
||||||
|
#elif defined CONFIG_BME280_FILTER_4
|
||||||
|
#define BME280_FILTER (2 << 2)
|
||||||
|
#elif defined CONFIG_BME280_FILTER_8
|
||||||
|
#define BME280_FILTER (3 << 2)
|
||||||
|
#elif defined CONFIG_BME280_FILTER_16
|
||||||
|
#define BME280_FILTER (4 << 2)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define BME280_CTRL_MEAS_VAL (BME280_PRESS_OVER | \
|
||||||
|
BME280_TEMP_OVER | \
|
||||||
|
BME280_MODE_NORMAL)
|
||||||
|
#define BME280_CONFIG_VAL (BME280_STANDBY | \
|
||||||
|
BME280_FILTER | \
|
||||||
|
BME280_SPI_3W_DISABLE)
|
||||||
|
|
||||||
|
#if defined CONFIG_BME280_I2C_ADDR_76
|
||||||
|
#define BME280_I2C_ADDR 0x76
|
||||||
|
#elif defined CONFIG_BME280_I2C_ADDR_77
|
||||||
|
#define BME280_I2C_ADDR 0x77
|
||||||
|
#endif
|
||||||
|
|
||||||
|
struct bme280_data {
|
||||||
|
struct device *i2c_master;
|
||||||
|
uint16_t i2c_slave_addr;
|
||||||
|
|
||||||
|
/* Compensation parameters. */
|
||||||
|
uint16_t dig_t1;
|
||||||
|
int16_t dig_t2;
|
||||||
|
int16_t dig_t3;
|
||||||
|
uint16_t dig_p1;
|
||||||
|
int16_t dig_p2;
|
||||||
|
int16_t dig_p3;
|
||||||
|
int16_t dig_p4;
|
||||||
|
int16_t dig_p5;
|
||||||
|
int16_t dig_p6;
|
||||||
|
int16_t dig_p7;
|
||||||
|
int16_t dig_p8;
|
||||||
|
int16_t dig_p9;
|
||||||
|
uint8_t dig_h1;
|
||||||
|
int16_t dig_h2;
|
||||||
|
uint8_t dig_h3;
|
||||||
|
int16_t dig_h4;
|
||||||
|
int16_t dig_h5;
|
||||||
|
int8_t dig_h6;
|
||||||
|
|
||||||
|
/* Compensated values. */
|
||||||
|
int32_t comp_temp;
|
||||||
|
uint32_t comp_press;
|
||||||
|
uint32_t comp_humidity;
|
||||||
|
|
||||||
|
/* Carryover between temperature and pressure/humidity compensation. */
|
||||||
|
int32_t t_fine;
|
||||||
|
|
||||||
|
uint8_t chip_id;
|
||||||
|
};
|
||||||
|
|
||||||
|
#define SYS_LOG_DOMAIN "BME280"
|
||||||
|
#define SYS_LOG_LEVEL CONFIG_BME280_SYS_LOG_LEVEL
|
||||||
|
#include <misc/sys_log.h>
|
||||||
|
#endif /* __SENSOR_BME280_H__ */
|
||||||
|
|
@ -1,204 +0,0 @@
|
||||||
/* sensor_bmp280.c - Driver for Bosch BMP280 temperature and pressure sensor */
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Copyright (c) 2016 Intel Corporation
|
|
||||||
*
|
|
||||||
* Licensed 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 <nanokernel.h>
|
|
||||||
#include <i2c.h>
|
|
||||||
#include <sensor.h>
|
|
||||||
#include <init.h>
|
|
||||||
#include <gpio.h>
|
|
||||||
#include <misc/byteorder.h>
|
|
||||||
#include <misc/__assert.h>
|
|
||||||
|
|
||||||
#include "sensor_bmp280.h"
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Compensation code taken from BMP280 datasheet, Section 3.11.3
|
|
||||||
* "Compensation formula".
|
|
||||||
*/
|
|
||||||
static void bmp280_compensate_temp(struct bmp280_data *data, int32_t adc_temp)
|
|
||||||
{
|
|
||||||
int32_t var1, var2;
|
|
||||||
|
|
||||||
var1 = (((adc_temp >> 3) - ((int32_t)data->dig_t1 << 1)) *
|
|
||||||
((int32_t)data->dig_t2)) >> 11;
|
|
||||||
var2 = (((((adc_temp >> 4) - ((int32_t)data->dig_t1)) *
|
|
||||||
((adc_temp >> 4) - ((int32_t)data->dig_t1))) >> 12) *
|
|
||||||
((int32_t)data->dig_t3)) >> 14;
|
|
||||||
|
|
||||||
data->t_fine = var1 + var2;
|
|
||||||
data->comp_temp = (data->t_fine * 5 + 128) >> 8;
|
|
||||||
}
|
|
||||||
|
|
||||||
static void bmp280_compensate_press(struct bmp280_data *data, int32_t adc_press)
|
|
||||||
{
|
|
||||||
int64_t var1, var2, p;
|
|
||||||
|
|
||||||
var1 = ((int64_t)data->t_fine) - 128000;
|
|
||||||
var2 = var1 * var1 * (int64_t)data->dig_p6;
|
|
||||||
var2 = var2 + ((var1 * (int64_t)data->dig_p5) << 17);
|
|
||||||
var2 = var2 + (((int64_t)data->dig_p4) << 35);
|
|
||||||
var1 = ((var1 * var1 * (int64_t)data->dig_p3) >> 8) +
|
|
||||||
((var1 * (int64_t)data->dig_p2) << 12);
|
|
||||||
var1 = (((((int64_t)1) << 47) + var1)) * ((int64_t)data->dig_p1) >> 33;
|
|
||||||
|
|
||||||
/* Avoid exception caused by division by zero. */
|
|
||||||
if (var1 == 0) {
|
|
||||||
data->comp_press = 0;
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
p = 1048576 - adc_press;
|
|
||||||
p = (((p << 31) - var2) * 3125) / var1;
|
|
||||||
var1 = (((int64_t)data->dig_p9) * (p >> 13) * (p >> 13)) >> 25;
|
|
||||||
var2 = (((int64_t)data->dig_p8) * p) >> 19;
|
|
||||||
p = ((p + var1 + var2) >> 8) + (((int64_t)data->dig_p7) << 4);
|
|
||||||
|
|
||||||
data->comp_press = (uint32_t)p;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int bmp280_sample_fetch(struct device *dev, enum sensor_channel chan)
|
|
||||||
{
|
|
||||||
struct bmp280_data *data = dev->driver_data;
|
|
||||||
uint8_t buf[6];
|
|
||||||
int32_t adc_press, adc_temp;
|
|
||||||
|
|
||||||
__ASSERT(chan == SENSOR_CHAN_ALL);
|
|
||||||
|
|
||||||
if (i2c_burst_read(data->i2c_master, data->i2c_slave_addr,
|
|
||||||
BMP280_REG_PRESS_MSB, buf, sizeof(buf)) < 0) {
|
|
||||||
return -EIO;
|
|
||||||
}
|
|
||||||
|
|
||||||
adc_press = (buf[0] << 12) | (buf[1] << 4) | (buf[2] >> 4);
|
|
||||||
adc_temp = (buf[3] << 12) | (buf[4] << 4) | (buf[5] >> 4);
|
|
||||||
|
|
||||||
bmp280_compensate_temp(data, adc_temp);
|
|
||||||
bmp280_compensate_press(data, adc_press);
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int bmp280_channel_get(struct device *dev,
|
|
||||||
enum sensor_channel chan,
|
|
||||||
struct sensor_value *val)
|
|
||||||
{
|
|
||||||
struct bmp280_data *data = dev->driver_data;
|
|
||||||
|
|
||||||
switch (chan) {
|
|
||||||
case SENSOR_CHAN_TEMP:
|
|
||||||
/*
|
|
||||||
* data->comp_temp has a resolution of 0.01 degC. So
|
|
||||||
* 5123 equals 51.23 degC.
|
|
||||||
*/
|
|
||||||
val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;
|
|
||||||
val->val1 = data->comp_temp / 100;
|
|
||||||
val->val2 = data->comp_temp % 100 * 10000;
|
|
||||||
break;
|
|
||||||
case SENSOR_CHAN_PRESS:
|
|
||||||
/*
|
|
||||||
* data->comp_press has 24 integer bits and 8
|
|
||||||
* fractional. Output value of 24674867 represents
|
|
||||||
* 24674867/256 = 96386.2 Pa = 963.862 hPa
|
|
||||||
*/
|
|
||||||
val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO;
|
|
||||||
val->val1 = (data->comp_press >> 8) / 1000;
|
|
||||||
val->val2 = (data->comp_press >> 8) % 1000 * 1000 +
|
|
||||||
(((data->comp_press & 0xff) * 1000) >> 8);
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static struct sensor_driver_api bmp280_api_funcs = {
|
|
||||||
.sample_fetch = bmp280_sample_fetch,
|
|
||||||
.channel_get = bmp280_channel_get,
|
|
||||||
};
|
|
||||||
|
|
||||||
static void bmp280_read_compensation(struct bmp280_data *data)
|
|
||||||
{
|
|
||||||
uint16_t buf[12];
|
|
||||||
|
|
||||||
i2c_burst_read(data->i2c_master, data->i2c_slave_addr,
|
|
||||||
BMP280_REG_COMP_START, (uint8_t *)buf,
|
|
||||||
sizeof(buf));
|
|
||||||
|
|
||||||
data->dig_t1 = sys_le16_to_cpu(buf[0]);
|
|
||||||
data->dig_t2 = sys_le16_to_cpu(buf[1]);
|
|
||||||
data->dig_t3 = sys_le16_to_cpu(buf[2]);
|
|
||||||
|
|
||||||
data->dig_p1 = sys_le16_to_cpu(buf[3]);
|
|
||||||
data->dig_p2 = sys_le16_to_cpu(buf[4]);
|
|
||||||
data->dig_p3 = sys_le16_to_cpu(buf[5]);
|
|
||||||
data->dig_p4 = sys_le16_to_cpu(buf[6]);
|
|
||||||
data->dig_p5 = sys_le16_to_cpu(buf[7]);
|
|
||||||
data->dig_p6 = sys_le16_to_cpu(buf[8]);
|
|
||||||
data->dig_p7 = sys_le16_to_cpu(buf[9]);
|
|
||||||
data->dig_p8 = sys_le16_to_cpu(buf[10]);
|
|
||||||
data->dig_p9 = sys_le16_to_cpu(buf[11]);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int bmp280_chip_init(struct device *dev)
|
|
||||||
{
|
|
||||||
struct bmp280_data *data = (struct bmp280_data *) dev->driver_data;
|
|
||||||
uint8_t buf;
|
|
||||||
|
|
||||||
i2c_reg_read_byte(data->i2c_master, data->i2c_slave_addr,
|
|
||||||
BMP280_REG_ID, &buf);
|
|
||||||
if (buf != BMP280_CHIP_ID) {
|
|
||||||
SYS_LOG_DBG("bmp280: bad chip id %x", buf);
|
|
||||||
return -ENOTSUP;
|
|
||||||
}
|
|
||||||
|
|
||||||
bmp280_read_compensation(data);
|
|
||||||
i2c_reg_write_byte(data->i2c_master, data->i2c_slave_addr,
|
|
||||||
BMP280_REG_CTRL_MEAS, BMP280_CTRL_MEAS_VAL);
|
|
||||||
i2c_reg_write_byte(data->i2c_master, data->i2c_slave_addr,
|
|
||||||
BMP280_REG_CONFIG, BMP280_CONFIG_VAL);
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
int bmp280_init(struct device *dev)
|
|
||||||
{
|
|
||||||
struct bmp280_data *data = dev->driver_data;
|
|
||||||
|
|
||||||
data->i2c_master = device_get_binding(CONFIG_BMP280_I2C_MASTER_DEV_NAME);
|
|
||||||
if (!data->i2c_master) {
|
|
||||||
SYS_LOG_DBG("bmp280: i2c master not found: %s",
|
|
||||||
CONFIG_BMP280_I2C_MASTER_DEV_NAME);
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
data->i2c_slave_addr = CONFIG_BMP280_I2C_ADDR;
|
|
||||||
|
|
||||||
if (bmp280_chip_init(dev) < 0) {
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
dev->driver_api = &bmp280_api_funcs;
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static struct bmp280_data bmp280_data;
|
|
||||||
|
|
||||||
DEVICE_INIT(bmp280, CONFIG_BMP280_DEV_NAME, bmp280_init, &bmp280_data,
|
|
||||||
NULL, SECONDARY, CONFIG_BMP280_INIT_PRIORITY);
|
|
||||||
|
|
@ -1,123 +0,0 @@
|
||||||
/*
|
|
||||||
* Copyright (c) 2016 Intel Corporation
|
|
||||||
*
|
|
||||||
* Licensed 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.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifndef __SENSOR_BMP280_H__
|
|
||||||
#define __SENSOR_BMP280_H__
|
|
||||||
|
|
||||||
#include <stdint.h>
|
|
||||||
#include <device.h>
|
|
||||||
|
|
||||||
#define BMP280_REG_PRESS_MSB 0xF7
|
|
||||||
#define BMP280_REG_COMP_START 0x88
|
|
||||||
#define BMP280_REG_ID 0xD0
|
|
||||||
#define BMP280_REG_CONFIG 0xF5
|
|
||||||
#define BMP280_REG_CTRL_MEAS 0xF4
|
|
||||||
|
|
||||||
#define BMP280_CHIP_ID 0x58
|
|
||||||
#define BMP280_MODE_NORMAL 0x03
|
|
||||||
#define BMP280_SPI_3W_DISABLE 0x00
|
|
||||||
|
|
||||||
#if defined CONFIG_BMP280_TEMP_OVER_1X
|
|
||||||
#define BMP280_TEMP_OVER (1 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_TEMP_OVER_2X
|
|
||||||
#define BMP280_TEMP_OVER (2 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_TEMP_OVER_4X
|
|
||||||
#define BMP280_TEMP_OVER (3 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_TEMP_OVER_8X
|
|
||||||
#define BMP280_TEMP_OVER (4 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_TEMP_OVER_16X
|
|
||||||
#define BMP280_TEMP_OVER (5 << 5)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if defined CONFIG_BMP280_PRESS_OVER_1X
|
|
||||||
#define BMP280_PRESS_OVER (1 << 2)
|
|
||||||
#elif defined CONFIG_BMP280_PRESS_OVER_2X
|
|
||||||
#define BMP280_PRESS_OVER (2 << 2)
|
|
||||||
#elif defined CONFIG_BMP280_PRESS_OVER_4X
|
|
||||||
#define BMP280_PRESS_OVER (3 << 2)
|
|
||||||
#elif defined CONFIG_BMP280_PRESS_OVER_8X
|
|
||||||
#define BMP280_PRESS_OVER (4 << 2)
|
|
||||||
#elif defined CONFIG_BMP280_PRESS_OVER_16X
|
|
||||||
#define BMP280_PRESS_OVER (5 << 2)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if defined CONFIG_BMP280_STANDBY_05MS
|
|
||||||
#define BMP280_STANDBY 0
|
|
||||||
#elif defined CONFIG_BMP280_STANDBY_62MS
|
|
||||||
#define BMP280_STANDBY (1 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_STANDBY_125MS
|
|
||||||
#define BMP280_STANDBY (2 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_STANDBY_250MS
|
|
||||||
#define BMP280_STANDBY (3 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_STANDBY_500MS
|
|
||||||
#define BMP280_STANDBY (4 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_STANDBY_1000MS
|
|
||||||
#define BMP280_STANDBY (5 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_STANDBY_2000MS
|
|
||||||
#define BMP280_STANDBY (6 << 5)
|
|
||||||
#elif defined CONFIG_BMP280_STANDBY_4000MS
|
|
||||||
#define BMP280_STANDBY (7 << 5)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if defined CONFIG_BMP280_FILTER_OFF
|
|
||||||
#define BMP280_FILTER 0
|
|
||||||
#elif defined CONFIG_BMP280_FILTER_2
|
|
||||||
#define BMP280_FILTER (1 << 2)
|
|
||||||
#elif defined CONFIG_BMP280_FILTER_4
|
|
||||||
#define BMP280_FILTER (2 << 2)
|
|
||||||
#elif defined CONFIG_BMP280_FILTER_8
|
|
||||||
#define BMP280_FILTER (3 << 2)
|
|
||||||
#elif defined CONFIG_BMP280_FILTER_16
|
|
||||||
#define BMP280_FILTER (4 << 2)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#define BMP280_CTRL_MEAS_VAL (BMP280_PRESS_OVER | \
|
|
||||||
BMP280_TEMP_OVER | \
|
|
||||||
BMP280_MODE_NORMAL)
|
|
||||||
#define BMP280_CONFIG_VAL (BMP280_STANDBY | \
|
|
||||||
BMP280_FILTER | \
|
|
||||||
BMP280_SPI_3W_DISABLE)
|
|
||||||
|
|
||||||
struct bmp280_data {
|
|
||||||
struct device *i2c_master;
|
|
||||||
uint16_t i2c_slave_addr;
|
|
||||||
|
|
||||||
/* Compensation parameters. */
|
|
||||||
uint16_t dig_t1;
|
|
||||||
int16_t dig_t2;
|
|
||||||
int16_t dig_t3;
|
|
||||||
uint16_t dig_p1;
|
|
||||||
int16_t dig_p2;
|
|
||||||
int16_t dig_p3;
|
|
||||||
int16_t dig_p4;
|
|
||||||
int16_t dig_p5;
|
|
||||||
int16_t dig_p6;
|
|
||||||
int16_t dig_p7;
|
|
||||||
int16_t dig_p8;
|
|
||||||
int16_t dig_p9;
|
|
||||||
|
|
||||||
/* Compensated values. */
|
|
||||||
int32_t comp_temp;
|
|
||||||
uint32_t comp_press;
|
|
||||||
|
|
||||||
/* Carryover between temperature and pressure compensation. */
|
|
||||||
int32_t t_fine;
|
|
||||||
};
|
|
||||||
|
|
||||||
#define SYS_LOG_DOMAIN "BMP280"
|
|
||||||
#define SYS_LOG_LEVEL CONFIG_BMP280_SYS_LOG_LEVEL
|
|
||||||
#include <misc/sys_log.h>
|
|
||||||
#endif /* __SENSOR_BMP280_H__ */
|
|
||||||
|
|
@ -5,4 +5,4 @@ CONFIG_NANO_TIMEOUTS=y
|
||||||
|
|
||||||
CONFIG_SENSOR=y
|
CONFIG_SENSOR=y
|
||||||
CONFIG_SENSOR_DEBUG=y
|
CONFIG_SENSOR_DEBUG=y
|
||||||
CONFIG_BMP280=y
|
CONFIG_BME280=y
|
||||||
|
|
@ -30,21 +30,22 @@
|
||||||
|
|
||||||
void main(void)
|
void main(void)
|
||||||
{
|
{
|
||||||
struct device *dev = device_get_binding("BMP280");
|
struct device *dev = device_get_binding("BME280");
|
||||||
|
|
||||||
PRINT("dev %p name %s\n", dev, dev->config->name);
|
PRINT("dev %p name %s\n", dev, dev->config->name);
|
||||||
|
|
||||||
while (1) {
|
while (1) {
|
||||||
struct sensor_value temp, press;
|
struct sensor_value temp, press, humidity;
|
||||||
|
|
||||||
sensor_sample_fetch(dev);
|
sensor_sample_fetch(dev);
|
||||||
sensor_channel_get(dev, SENSOR_CHAN_TEMP, &temp);
|
sensor_channel_get(dev, SENSOR_CHAN_TEMP, &temp);
|
||||||
sensor_channel_get(dev, SENSOR_CHAN_PRESS, &press);
|
sensor_channel_get(dev, SENSOR_CHAN_PRESS, &press);
|
||||||
|
sensor_channel_get(dev, SENSOR_CHAN_HUMIDITY, &humidity);
|
||||||
|
|
||||||
PRINT("temp: %d.%06d; press: %d.%06d\n",
|
PRINT("temp: %d.%06d; press: %d.%06d; humidity: %d.%06d\n",
|
||||||
temp.val1, temp.val2, press.val1, press.val2);
|
temp.val1, temp.val2, press.val1, press.val2,
|
||||||
|
humidity.val1, humidity.val2);
|
||||||
|
|
||||||
task_sleep(sys_clock_ticks_per_sec);
|
task_sleep(sys_clock_ticks_per_sec/5);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue