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Standard RMS block didn't show in capture

SigmaDSP & SigmaStudio Philip May 19, 2011 00:00 6 replies Original on forum ↗
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Philip Question
May 19, 2011 00:00

I am using sigma studio 3.3. My project is to using small MCU to control the sigma DSP.

When I use the Standard RMS (Two channel compressor). I can not see the capture of the command and data send out. Any reason for that?

Another question is, for those ratio/threshold paramters, will the DSP get it directly? Or just the PC(Sigma Studio Software) convert to a 34 point table(like the 'Show Graph') and send to DSP ?

Thanks a lot.

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ADIApproved Reply
May 25, 2011 00:00

Hi Philip,

There are no direct parameter mappings between the threshold and ratio parameters to the RAM. Basically, those two parameters are used to calculate the gain table that is stored in RAM. In this thread, I show an example of how to calculate the gain table: https://ez.analog.com/message/5004#5004

Thanks for pointing out the bug involving the Standard RMS compressor and the Capture window. That's pretty serious! I'll report it ASAP.

In the meantime, you can use the Params window to see the values stored in RAM. Check this video to see how it works: http://videos.analog.com/?fr_story=d048b8cab340b3a42cb187e811139e9c1d523ad1&rf=bm

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ADIApproved Reply
May 25, 2011 00:00

Here's my bug report to the software team:

If you add any of the "Standard Compressor" cells to a project and compile, then change any of the parameters in the control GUI, the Capture Window does not update, and no data is written to the SigmaDSP. The data will only update if you do another Link-Compile-Download.

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ADIApproved Reply
May 25, 2011 00:00

Philip,

If you have the hardware connected to the PC, this problem goes away. It is only an issue when the board is not connected to the computer. That's because the algorithm is waiting for an acknowledge from the device before it writes the updated parameters. The software engineer is looking into this.

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ADIApproved Reply
May 25, 2011 00:00

The software engineer has solved the problem. It will be fixed in the next SigmaStudio release.

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ADIApproved Reply
May 25, 2011 00:00

Issue was fixed in software.

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EZAdministrator Reply
Aug 2, 2018 00:00

This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

Thank you,
EZ Admin

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