ADAU1452 multi output selector routine request help

Hello jamesli,

Sorry for the delay in responded.

I think the easiest way is to use an AUXADC and scale the output and feed it to a table. Just be certain that the control input to the De-MUX never exceeds the number of outputs-1. Most of these cells are not limit protected so this means you would be stepping on memory locations that are used for other objects.

In your hardware schematic I see the switch is not starting from 3V3 but from one step down the resistor ladder. So you might have to make a slight adjustment to get the levels to work properly. So you have 8 positions on your switch but the divider has 9 positions. So you might have to set it for 9 in your program so it divides the expected voltage range of the AUXADC properly. Then I would either put in a limiter on the control input because if the switch is a break before make then for a millisecond or so you might float up to 3V3. Another way to do it is to have a 9th output of the MUX going to nowhere. This way if it is ever selected it would be a safe setting.

Here is a screenshot of my example program and I will attach the project as well.

Note that this project uses a multiplexer rather than a demultiplexer. Obviously, they will work in the same way with regards to the control of the switch.

Thanks,

Dave T

5165.ADAU1452REVB Headphone Spatial Widening-with external MUX.zip

Hello james,

Glad you searched and found the answer. There is a lot on this forum. I suggest you should follow KJBob. He has so many different posts that shows a number of creative ways to use SigmaStudio. You should find some inspiration there.

Thanks,

Dave T