zephyr

History

Tomasz Bursztyka e18fcbba5a device: Const-ify all device driver instance pointers 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>		2020-09-02 13:48:13 +02:00
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src	device: Const-ify all device driver instance pointers	2020-09-02 13:48:13 +02:00
CMakeLists.txt	…
README.rst	…
prj.conf	…
sample.yaml	…

README.rst

.. _current_sensing:

Current Sensing
###############

Overview
********
This is a sample app to interface with TI INA219 power monitor.
The values used in the app are for use on Adafruit's breakout board
(https://www.adafruit.com/products/904).

This assumes the slave address is 0x40, where A0 and A1 are all tied to ground.

Building and Running
********************

This project outputs measured values to the console. It can be built and
executed as follows:

.. zephyr-app-commands::
   :zephyr-app: samples/drivers/current_sensing
   :host-os: unix
   :goals: build flash
   :compact:

Sample Output
=============

.. code-block:: console

	Bus Voltage: 3300 mV
	Shunt Voltage: 100 uV
	Current: 5000 uA
	Power: 16500 uW