A2B MIC TESTING SYSTEM

Hi, Alex,

Thank you for reaching out.

I should first clarify that AD2427 just support sub node capable device only and support PDM and no TDM/I2S support. Therefore, you may use AD2428 as main node instead.

There is a 3 Node Sample Demo of AD2428 for your reference. You can update the part number of sub nodes in Sigma Studio (SS)'s schematic from AD2428 to AD2427. 

You should first download A2B Software Package as follow. 

A2B Software for Windows/Baremetal Previous Release (SigmaStudio)

Under the installation path, you can find the demo quick start guide at

<Your installation path>\Analog Devices\ADI_A2B_Software-Rel19.4.4\Docs

Hi YANAMIANNA, Thank you for your answer , 

Yes,  we use the 3 node sample demo from the installation package , also modify the main node chip to 2428, and sub nodes is 2427,  but we find one issue , we only can get the last node signal , and can not get the others node signal , what is the issue  and how to solve ? can you send me one config file ? alexhe@issauto.com,  thank you,

Alex

Hi, Alex,

Thank you for reply. 

Sorry for late response. Since you are debugging with the 3 node sample demo, may I ask if the problem you met is that you can only hear the headphone input from the last node but cannot hear the microphone input from the mid sub node? If you wish to use digital microphone input, you should enable the Alt. Clock on IO7  configuration.

Should you have any further questions, please feel free to reply.

Hi, Alex,

Thank you for reply. 

Sorry for late response. Since you are debugging with the 3 node sample demo, may I ask if the problem you met is that you can only hear the headphone input from the last node but cannot hear the microphone input from the mid sub node? If you wish to use digital microphone input, you should enable the Alt. Clock on IO7  configuration.

Should you have any further questions, please feel free to reply.

Hi YANAMIANNA ， thanks for your reply , we fix this issue , 

    Now we have one more issue , we test the A2B MIC every time , when one MIC does now work , and we should change another MIC , during the status , we must power on the main node again and the main node will continual work , my means does the main node support plug and play MIC and does not need power on again ?  how to solve this issue ?

Thank you,

Alex

Hi  YANAMIANNA

     Thanks for your reply , and we fix this issue , 

      Now we have another issue , can the A2B net support plug and play ? means when we change one MIC node and does not need power on the main node again ? now we must power on the main node every time when we change the A2B MIC .

Thank you,

Alex