How to read status of Singal Detection by Safeload on ADAU1451?

Hello Jason,

You can connect a DSP Readback to the Signal Detect output and read from there. With your target hardware connected, pressing the Readback's Read button displays the appropriate address in the Capture Window:

When I tried this, pressing the Read button many times did not cause any audible disturbance. The I2C Read procedure is described on Page 37 of the ADAU1452 Data Sheet.

Best regards,

Bob

Hello Bob,

This portion has been tested. Is it able to read b Safeload too? Can you descripte if

it is avaiable? We would like to read some Filter too.

Hello Jason,

I'm not able to test reading a ADAU1451 filter since my prototype hardware uses a ADAU1701, and though I do have a ADAU1452MINIZ board, I can only interface it with SigmaStudio. Perhaps another member with ADAU145x experience could answer for you. In the meantime, you could experiment with an ordinary block read of a filter's contents, while testing to see if such a read causes any audible artifacts.

Because all the filter coefficients come from your system microcontroller (either at the initial program load or via I2C/SPI), your microcontroller already "knows" what's in the filters. It may be simpler to keep the coefficients in the uC's memory in parallel with what's in the DSP. Whenever the end user adjusts EQ (etc), your uC would calculate the new coefficients, refresh its own memory, then safeload to the DSP. This way, there's never a need to read from a filter.

Best regards,

Bob

Is there anyone can have 145X EVB can test and tell m?

Hi Jason:

You don't use safeload to read. Safeload is meant for writing multiple values, usually related to filters but sometimes used for compressors......

To read a value, simply read from the direct memory location.

Yes, this is different from the 1701 since the 1701 core didn't allow direct memory reads. Starting with the 1761,1781,144x and 145x, you can simply read from memory directly.

Does this makes sense?

Miguel

Hello Miguel,

I got this point if u say different btw 1701. then I got it.

However, where can I get address of Signal Detetor becasue it doens't show in capture window of SS.

Should I look log file as saftload address shows one?

HI Jason:

Corrected the logged files should contain the address that you are looking for. These files are written after the compilation process.

Miguel

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