Starting Index of UpDownLUT

Hello Lukas_Jani,

Can you give us a little more info on you application?

Lukas_Jani said:

At StartUp i want the LookUp Table to start with Position 1, and not position 0.

You want to ignore the value which is at index 0? so, you want to start with index 1?

Or your control input starts at 1 (not from 0?), so you want to start from index 1, just not to miss anything? i.e if your control starts from 1 then you will probably miss the value at index 0? Hence, you start from index 1?

If you can explain, why do you want this way then we can work on the possibilities.

Lukas_Jani said:

Hence, the task would be to set the value stored in Interface_2 to 1 (or any other number) at startup. Can anyone tell me how to do this?

You want to overwrite the 'Interface_read' parameter to some other constant?

Please describe a little more about your requirement and kindly attach your project. 

Regards,

Harish

Hello Lucas,

The questions Harish asked are stull valid but I will attach an example project that shows you how to start with a different default value. This is the assumption we will make. That you just want to start with a different starting value. 

This example project uses an Up/down counter but all you need to look at is what is going on with the Interface Read and Write pins. It is the same functionality with the rotary volume control cell you are using. Really, any cell that uses an interface read/write. 

Dave T

5047.ADAU1452 Test of Interface read and write with Default Setting.dspproj

Hello Harish, Hello Dave,

i dont want to ignore the value at position 0, just a startup at value one. To be specific, the control implemented here is for an equalizer.

Position 0 is +3db for the filter, 1 is 0db, 2 is -3db and so on. The default value at startup should always be 0db. 

For this i would like to set a default value for the stored value in the interface x storage position. 

Basically, Daves Circuit is the solution and does exactly what i want.... i just imagined there would be a simpler solution

Thanks alot for your help!