Programming two ADAU1452 with two USBi, using the same computer

ARanch on Jun 24, 2021

Hi folks,

I'm trying to program two instances of the same loudspeaker with one instance of Sigma studio and USBi, but I have hit a brick wall. The procedure explained here wont work, because speakers A and B are separate, and must be tested at varying distances to each other.

My setup:

Laptop USB port 1 -> USBi -> speaker A (ADAU 1466)

Laptop USB port 2 -> USBi -> speaker B (ADAU 1466)

Ideally, I would like to:

1. be able to program both speaker A and B with the same sigma studio file in one go (the solution explained here

2. and, be able to program both speaker A and B with different programs, but from the same instance of Sigma studio.

Is there a way I can configure the USBi block in HW config to achieve this? Or any other way?

Thanks!

Added explanation of why https://ez.analog.com/dsp/sigmadsp/w/documents/5177/can-i-program-multiple-sigmadsps-in-parallel-using-one-usbi wont work.
[edited by: ARanch at 8:35 AM (GMT -4) on 24 Jun 2021]

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ARanch Jun 24, 2021 in reply to Ken.M +1

Alright, thanks for clarifying!

0 Ken.M

on Jun 24, 2021 2:17 PM 3 months ago
Unfortunately, only one USBi at a time is supported due to limitations of the USB transceiver IC. Sorry.
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0 ARanch on Jun 24, 2021 7:03 PM 3 months ago in reply to Ken.M

Alright, thanks for clarifying!
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0 DaveThib

on Jul 1, 2021 4:35 PM 2 months ago
Hello ARanch,

I would like to chime in here with my thoughts on this. As noted earlier, you cannot use two USBi's on one computer to talk to two eval boards. However, you can use one USBi and communicate to two eval boards. Then in the SigmaStudio project you can pull in two instances of the SigmaDSP and have both in one project. SigmaStudio will program both at thesame time, Well, in sequence after you click on link/compile/download.

This is detailed in a rather old App note AN-1006. Also, in the EVAL-ADAU1452RevB user guide I showed how to modify the USBi and the eval board to talk to the codec from SigmaStudio. The process for talking to two DSPs is pretty much the same concept.

What you will have to do is to build some custom ribbon cables to bring out the Slave Select of the second eval board to connect to the second SPI latch of the USBi. It is pin one of the 14 pin header on the USBi. Keep in mind that the USBi is stuffed with a 10-pin ribbon into the middle pins of a 14-pin footprint. Look at page 5 of AN-1006.

Dave T

AN-1006: Using the EVAL-ADUSB2EBZ | Analog Devices
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0 ARanch on Jul 2, 2021 9:21 AM 2 months ago in reply to DaveThib

Hey Dave,

Thanks for pointing this out!
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0 IAmAudrey on Jul 26, 2021 1:19 AM 2 months ago in reply to DaveThib

Hi Dave,

I have a similar issue, but my hardware is two ADAU1701s, each with an EEPROM. I *really* don't want to have to pull my chassis open to move my USB interface around between debug headers, but I have just discovered that all ADAU1701s look for EEPROM at the same address, so changing the address of the 1701s doesn't help me at all as I can only write the same program to both EEPROMs.

This is the USB interface board I am using: https://store.sure-electronics.com/product/710

The USB chip on it is the Cypress CY7C68013A - datasheet is here: https://www.cypress.com/file/138911/download

Do you know if the transceiver chip on this board has the same limitation as the ADI USBI, limiting it to one board per computer?

Thank you,

Audrey
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