asau1452 safe load writes 7ch stereo multiplexer

Hello rwalborn,

The safe load allows only 5 parameters to be updated; for example, you can update the 2nd order biquad IIR coefficients (5 coeffs) on the fly using safe load method.

Then why are you seeing 5 parameters? Because that's how this procedure works.

You have to write the actual coefficients to safe load data register (5 writes), and you have to write the starting address of the coefficients to this safe load target address register (6th write) and then you have to write how many parameter you are updating (total no of data writes) to the safe load trigger register (7th write), in Biquad IIR filter case, this trigger register will be 5.

The below given address references are from datasheet.

Step 1 - write data to safeload - data registers (0x6000 - 0x6004)
Step 2 - write target address to safeload - target address register (0x6005)
Step 3 - write number of words to safeload - trigger register (0x6006)

So, you have to write to 7 registers in which 5 registers contain the actual parameter data and other two registers are 'target address' and 'no.of writes' register.

So, 5 parameters can be written using single safe load method.

The below thread has an example code snippet; it helps you understand how safe load works.

ESP32 SPI control of ADAU1467 parameter RAM on EVAL-ADAU1467Z — writes not taking effect - Q&A - SigmaDSP Processors & SigmaStudio Dev. Tool - EngineerZone

Kindly get back to us if you need any further assistance.

Regards,

Harish