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ADAU1452 + cs42448- No output

SigmaDSP & SigmaStudio gZoppi550 Jun 25, 2023 00:00 9 replies Original on forum ↗
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gZoppi550 Question
Jun 25, 2023 00:00

Hello,

I an struggling in the attempt to get the output from a chinese board with ADAU1452 and CS42448 as a CODEC.

I can get output from a white noise demo project (output 4 and 5 in my case).

White Noise test with output 4 and 5 working is working.

so I know there's a working connection between the DSP and the codec.

Following the UG1662 (EVAL-ADAU1452REVBZ) I can get input without output, even on outputs 4 and 5: the detectors at the input are responsive with the input signal and track perfectly the volume when it changes, but i have no output where it is supposed to be (output 4 and 5).

If I replicate the white noise experiment in this testbench I have no output.

I tried adding the input to the white noise project.

The result is that the input on out5 is absent as you can see from the level detector while the output on out 4 (white noise) is present.

So i believe there's something in the configuration that I should attention. I tried to compare both configuration but I didn't get the expected result.

Any suggestion?

Is there any detailed documentation (in addition to UG1662) to ease the learning curve?

Thanks for the precious support.

Best Regards,

GZ

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Harishgowtham Reply
Jun 26, 2023 00:00

Hello GZ,

gZoppi550 said:
so I know there's a working connection between the DSP and the codec.

The white noise is internally generated, and the level detectors are also inside the DSP. So, this won't conclude the CODEC is working unless you hear the output at the jack. So, I guess the issue is with the connection or may be with the register settings. Please share your schematic and the project. So, we will have a look and get back to you.

which mode you are trying to run TDM,I2S and what sample rate?

Regards,

Harish

gZoppi550 Reply
Jun 26, 2023 00:00

Hello Harish,

thank you for your swift reply.

The first image is related to the working white noise test. I confirm that the white noise is output to the speaker, so there's both physical and logical connection, while the second image is related to the first hello-world project i am trying to put together.

Here's a new run of my project In which you can see that I have input from an external source, there's no output on out4 and no white noise ouput on out5.

I am assuming to be working in I2S mode, but I am confused about how to verify that, I cannot find enough documentation on how to configure from scratch a basic project taking care of the interface between DSP and CODEC.

I am confident you can point me to the right direction.

Thanks

GZ

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Harishgowtham Reply
Jun 27, 2023 00:00

Hello GZ,

Sorry, I didn't ask for the sigma studio schematic alone. I really asked for the hardware schematic. That is the connection between your DSP and the CODEC.

How is the codec getting the master clock? Are you driving the codec from the CLKOUT pin of the DSP? Again, what is the sample rate?

Are you driving the ADC/DAC ports as master or slave?

The codec that you mentioned above can't use TDM in master mode. TDM will be supported only in slave mode.

How many channels you want to get into the DSP and get out from the DSP?

Kindly attach your sigma studio project and the hardware schematic. Without your project and hardware schematic, it is very hard to figure out what's going on.

Regards,

Harish

gZoppi550 Reply
Jun 27, 2023 00:00

Hello

Find in attach the project that I am trying to develop (hello_world.dspproj), which has a proven working input from codec-> DSP and no ouput.

The second project (test_white_noise.dspproj) has a proven working output from DSP-> speaker

Having info about the board is hard. I found the schematic :DSP-ADAU1452/Drawings/Schematic/DSP-ADAU1452-2.0-Schematic.pdf at master · ohdsp/DSP-ADAU1452 · GitHub

which comes from the following repository :GitHub - tecteun/ADAU1452_DSP: Chinese low cost eval board

I will doublecheck input (Codec to to DSP) and output (DSP-> Codec) as soon as possible.

Thank you

GZ

As for the project, the interface doesn't allow me to upload any project or .zip file. I had to change the file extension from export.zip to export.txt. You should restore the .zip extension.

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export.txt
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export.txt23.1 KB
BartLuyckx Reply
Dec 18, 2023 00:00

Could you make it work? I encounter the same problem with my adau1452 cs42448 board

gZoppi550 Reply
Dec 18, 2023 00:00

Not yet. I have the cheap china DSP + CODEC boards from aliexpress. I believe we share the same hardware.

BartLuyckx Reply
Dec 18, 2023 00:00

Can someone pick up this issue please. Seems many struggle to make the adau1452_cs42448 combo from AliExpress to work properly

gZoppi550 Reply
Dec 18, 2023 00:00

Does anyone have the right schematic for the modules?

I found something in this long thread low cost ADAU1452 China board... | diyAudio ..

GenevaC Reply
Dec 18, 2023 00:00

BartLuyckx I see you are getting assistance with the new question you created which can be found here:

ez.analog.com/.../adau1452-codec-cs42448-is-not-working