.. _qeo_dac_out:

QEO_DAC_OUT
======================

Overview
--------

QEO_DAC_OUT sample shows QEO generates waveforms through DAC according to received postion.

Board Setting
-------------

- Output DAC signals at the specified pin. （Please refer to   :ref:`Pin Description <board_resource>` ）

Running the example
-------------------

When the project runs correctly, the serial port terminal will receive the following information, use oscilloscope to observe the signal on the pin:

.. code-block:: console

   QEO DAC wave example
   QEO generate wave with sofeware inject postion
   qeo wave0 output:
   65535
   65526
   65496
   65447
   65378
   65290
   65182
   65054
   64907
   64740
   64554
   64349
   64126
   63883
   63621
   63342
   63043
   62726
   ...
   qeo wave1 output:
   16384
   15696
   15015
   14344
   13684
   13036
   12400
   11777
   11165
   10567
   9982
   9410
   8854
   8311
   7783
   7270
   ...
   qeo wave2 output:
   16382
   17081
   17792
   18512
   19240
   19976
   20721
   21472
   22231
   22995
   23766
   24542
   25323
   26108
   26897
   27690
   28486
   ...
   QEO generate wave base on hardware(MMC) provide position

sample printf wave value，using tool(like excel)to fit data and generate waveforms.


.. image:: ../../../../../../samples/drivers/qeo/dac_out/doc/qeo_dac_1.png
   :alt:

oscilloscope observe 2 wave on DAC pins.


.. image:: ../../../../../../samples/drivers/qeo/dac_out/doc/qeo_dac_2.png
   :alt: