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Now that device_api attribute is unmodified at runtime, as well as all the other attributes, it is possible to switch all device driver instance to be constant. A coccinelle rule is used for this: @r_const_dev_1 disable optional_qualifier @ @@ -struct device * +const struct device * @r_const_dev_2 disable optional_qualifier @ @@ -struct device * const +const struct device * Fixes #27399 Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com> |
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boards | ||
src | ||
CMakeLists.txt | ||
prj.conf | ||
README.rst | ||
sample.yaml |
.. _dht: DHT: Aosong DHT Digital-output Humidity and Temperature Sensor ############################################################## Description *********** This sample application periodically (0.5 Hz) measures the ambient temperature and humidity. The result is written to the console. Wiring ******* This sample uses an external breakout for the sensor. A devicetree overlay must be provided to identify the sensor variant and the GPIO used to control the sensor. Building and Running ******************** After providing a devicetree overlay that specifies the sensor location, build this sample app using: .. zephyr-app-commands:: :zephyr-app: samples/sensor/dht :board: nrf52dk_nrf52832 :goals: build flash Sample Output ============= .. code-block:: console *** Booting Zephyr OS build zephyr-v2.1.0-329-g38418b26c4cc *** [0:00:00.027]: 20.0 Cel ; 48.7 %RH [0:00:02.053]: 19.8 Cel ; 48.7 %RH [0:00:04.079]: 20.0 Cel ; 48.7 %RH [0:00:06.105]: 19.8 Cel ; 48.7 %RH [0:00:08.130]: 20.0 Cel ; 48.8 %RH [0:00:10.156]: 20.1 Cel ; 48.8 %RH [0:00:12.182]: 19.7 Cel ; 48.7 %RH [0:00:14.207]: 20.0 Cel ; 48.8 %RH <repeats endlessly>