Connecting eval_im69d130_flexkit to eval-adau1787z

Hello,

I try to connect   eval_im69d130_flexkit  (https://www.infineon.com/cms/en/product/evaluation-boards/eval_im69d130_flexkit/) to eval-adau1787z (https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/eval-adau1787z.html). 

I connected it to J6, DMIC01 (VDD - 11, DATA - 9, CLOCK - 3, GROUND - 1). I checked all the parameters in Sigma Studio 4.5 in HW configuration tabs, but still I can´t here anything but crackling noise, witch alter when I change decimator or fs values. I have tried everything, but I can't get any sound out. What could be the reason for that? Do I have right connections?

Br,

Jussi Jaatinen, Finland

    •  Analog Employees 
    on Mar 30, 2020 4:33 PM 7 months ago

    Jussi,

    Would you be able to send your SigmaStudio project as well?

  • Hello,

    Sure I can. It's just a mic connection test with 4 analog and 2 digital mics. I also tried to make FastDSP connection, but it doesn't work either. Maybe there is a wrong routing to DAC? It is also in that version.  

    https://drive.google.com/file/d/1tNDmX_S4JId0WzIYo_h-xVF2_pKNlxfr/view?usp=sharing 

    Br,

    Jussi Jaatinen

    •  Analog Employees 
    on Mar 31, 2020 3:53 PM 7 months ago in reply to JussiJaatinen

    Jussi,

    I am looking through your project and I notice one thing: you have physically connected the flexkit DMIC to DMIC01 on J6.  But the SDSP is configured to route DMIC2 and DMIC3 to the SDSP outputs.  If connecting the flexkit to DMIC_01, then the inputs DMIC0 and DMIC1 should be checked instead of DMIC2 and DMIC3 in the SDSP schematic.  This is highlighted in the attached image. 

    If DMIC2 and DMIC3 are truly needed, you could also connect the flexkit to DMIC2_3 on J7, instead of DMIC_01 on J6. 

    Otherwise thus far I do not see any issues in the project setup.  Can you try this adjustment and see if you are able to get output?

  • Hello,

    Actually I have two flex kits installed. One to J6 and the second one to J7. And the channel selectors are set differently so one has been connected to ground and another to vdd. In any case with whatever combination I can't hear anything. I have to check once more the connections of flex kit, but I think they should be ok. 

    Thanks anyway for help :-)

    Jussi

    •  Analog Employees 
    on Mar 31, 2020 7:15 PM 7 months ago in reply to JussiJaatinen

    Jussi,

    OK. Are you able to connect an oscilloscope to J5, and verify the "CLK0" and "CLK1" outputs?  LIkewise can you verify the "DATA0/1" and "DATA2/3" signals are present? 

    Another test is to go to the DAC_CTRL tab, and change the DAC_ROUTE0 and DAC_ROUTE1 values to DMIC2 and DMIC3.  This would directly route the DMIC to the DAC, and bypass the SDSP schematic.  This could help to see if the issue is with the DMIC connection, or with something in the project schematic.