zephyr

History

Torsten Rasmussen 407b49b35c cmake: use find_package to locate Zephyr Using find_package to locate Zephyr. Old behavior was to use $ENV{ZEPHYR_BASE} for inclusion of boiler plate code. Whenever an automatic run of CMake happend by the build system / IDE then it was required that ZEPHYR_BASE was defined. Using ZEPHYR_BASE only to locate the Zephyr package allows CMake to cache the base variable and thus allowing subsequent invocation even if ZEPHYR_BASE is not set in the environment. It also removes the risk of strange build results if a user switchs between different Zephyr based project folders and forgetting to reset ZEPHYR_BASE before running ninja / make. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>		2020-03-27 16:23:46 +01:00
..
boards	…
src	…
CMakeLists.txt	cmake: use find_package to locate Zephyr	2020-03-27 16:23:46 +01:00
README.rst	…
prj.conf	…
sample.yaml	…

README.rst

.. _video_capture-sample:

Video Capture
#############

Description
***********

This sample application uses the Video API to retrieve video frames from the
video capture device, writes a frame count message to the console, and then
discards the video frame data.

Requirements
************

This sample requires a video capture device (e.g. a camera).

- :ref:`mimxrt1064_evk`
- `MT9M114 camera module`_

Wiring
******

On :ref:`mimxrt1064_evk`, The MT9M114 camera module should be plugged in the
J35 camera connector. A USB cable should be connected from a host to the micro
USB debug connector (J41) in order to get console output via the freelink
interface.

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

For :ref:`mimxrt1064_evk`, build this sample application with the following commands:

.. zephyr-app-commands::
   :zephyr-app: samples/video/mt9m114
   :board: mimxrt1064_evk
   :goals: build
   :compact:

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

.. code-block:: console

    Found video device: CSI
    width (640,640), height (480,480)
    Supported pixelformats (fourcc):
     - RGBP
    Use default format (640x480)
    Capture started
    Got frame 743! size: 614400; timestamp 100740 ms
    Got frame 744! size: 614400; timestamp 100875 ms
    Got frame 745! size: 614400; timestamp 101010 ms
    Got frame 746! size: 614400; timestamp 101146 ms
    Got frame 747! size: 614400; timestamp 101281 ms
    Got frame 748! size: 614400; timestamp 101416 ms

   <repeats endlessly>

References
**********

.. _MT9M114 camera module: https://www.onsemi.com/PowerSolutions/product.do?id=MT9M114