79e6b0e0f6
As of today <zephyr/zephyr.h> is 100% equivalent to <zephyr/kernel.h>. This patch proposes to then include <zephyr/kernel.h> instead of <zephyr/zephyr.h> since it is more clear that you are including the Kernel APIs and (probably) nothing else. <zephyr/zephyr.h> sounds like a catch-all header that may be confusing. Most applications need to include a bunch of other things to compile, e.g. driver headers or subsystem headers like BT, logging, etc. The idea of a catch-all header in Zephyr is probably not feasible anyway. Reason is that Zephyr is not a library, like it could be for example `libpython`. Zephyr provides many utilities nowadays: a kernel, drivers, subsystems, etc and things will likely grow. A catch-all header would be massive, difficult to keep up-to-date. It is also likely that an application will only build a small subset. Note that subsystem-level headers may use a catch-all approach to make things easier, though. NOTE: This patch is **NOT** removing the header, just removing its usage in-tree. I'd advocate for its deprecation (add a #warning on it), but I understand many people will have concerns. Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no> |
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| src | ||
| CMakeLists.txt | ||
| README.rst | ||
| prj.conf | ||
| sample.yaml | ||
README.rst
.. _ina219:
INA219 Bidirectional Power/Current Monitor
##########################################
Overview
********
This sample application measures shunt voltage, bus voltage, power and current
every 2 seconds and prints them to console.
The calibration/configuration parameters can be set in the devicetree file.
References
**********
- `INA219 sensor <https://www.ti.com/product/INA219>`_
Wiring
******
The supply voltage of the INA219 can be in the 3V to 5.5V range.
The common mode voltage of the measured bus can be in the 0V to 26V range.
Building and Running
********************
.. zephyr-app-commands::
:zephyr-app: samples/sensor/ina219
:board: blackpill_f411ce
:goals: build flash
Sample Output
=============
When monitoring a 3.3 V bus with a 0.1 Ohm shunt resistor
you should get a similar output as below, repeated every 2 seconds:
.. code-block:: console
Shunt: 0.001570 [V] -- Bus: 3.224000 [V] -- Power: 0.504000 [W] -- Current: 0.157000 [A]
A negative sign indicates current flowing in reverse direction:
.. code-block:: console
Shunt: -0.001560 [V] -- Bus: 3.224000 [V] -- Power: 0.502000 [W] -- Current: -0.156000 [A]