MATLAB: Acquisition with Analog Discovery 2

Question

Hi,

In order to acquire analog data, I use the Analog Discovery 2 from Digilent. I used the "Data Acquisition Toolbox" and the "Digilent Analog Discovery Support from MATLAB" package.

I achieve to get data in a tab and want to automatically launch the acquisition when the power is high enough. Maybe using a trigger ?

I also can't use the App, my device doesn't appear and the "Refresh" button doesn't change anything.

If someone already used this device can help me !

Thanks

Answer 1

Hi Christophe,

There are a few workflows that you may be interested in looking into. First, make sure that you can detect the Analog Discovery 2 on a separate Digilent software to make sure that your issue is not due to hardware connection. Please also make sure that you have the correct support package for Digilent Analog Discovery Hardware downloaded. I have included the support package in the link below.

https://www.mathworks.com/matlabcentral/fileexchange/40344-data-acquisition-toolbox-support-package-for-digilent-analog-discovery-hardware

After verifying this, you will want to successfully connect to the Analog Discovery 2 device through MATLAB then transmit and receive data. The examples below might be useful for you to get started.

https://www.mathworks.com/help/daq/examples/getting-started-acquiring-data-with-digilent-analog-discovery.html

https://www.mathworks.com/help/daq/examples/getting-started-generating-data-with-digilent-analog-discovery.html

https://www.mathworks.com/help/daq/examples/acquiring-and-generating-data-at-the-same-time-with-digilent-analog-discovery.html

Lastly, if you are interested in launching acquisition when a certain variable reaches a threshold or triggers, you may want to consider using MATLAB callbacks to accomplish this. An alternative would be to have a control for loop within the code that triggers when the power read from the device exceeds your intended threshold. If you are interested in using callback functions, here are a few links that may be helpful.

https://www.mathworks.com/help/matlab/creating_plots/callback-definition.html

https://www.mathworks.com/help/daq/examples/software-analog-triggered-data-capture.html