Controlling DS1881 Digital Potentiometer from ADAU1463 for Analog Audio Volume (No External MCU)

Hi everyone,

I'm working on a prototype board that uses the ADAU1463 DSP, and I’m experimenting with controlling the volume of an analog-only audio path (i.e., the signal does not enter the ADAU1463).

To adjust the volume, I’m using a DS1881 digital potentiometer, controlled via I2C. I already have:

A working I2C communication between the ADAU1463 and DS1881.

A button interface connected to the multipurpose pins of the ADAU1463, which I'll use to control volume up/down.

The ability to send static I2C commands using the master Control Port IO – Runtime External Trigger block with XML configuration.

However, this method requires a separate XML file per tap value, which means I'd need 33 or 63 files depending on the DS1881 mode (33 or 64 taps), making it impractical for smooth volume control.

Additionally, this prototype doesn’t include an external microcontroller, so I’d like to control the DS1881 directly from the ADAU1463 as efficiently as possible.

My question is:
Is there a recommended or more flexible way to control the DS1881 (e.g., sending dynamic I2C data) from the ADAU1463 without needing a large set of static XML files?

More specifically:

Can the ADAU1463 dynamically send I2C data to the DS1881, perhaps through a sequence of registers or script logic?

Is there a way to update the master Control Port data from within SigmaStudio logic based on button presses?

Or is this kind of task outside the scope of what the ADAU1463 can do without a companion MCU?

Any tips, examples, or experience with similar setups would be highly appreciated.

Thanks!

Audio Signal Processors

hardware

i2c

data converters

adau1463

SigmaDSP Audio Processors

Digital Potentiometers (DigiPOT)

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