SigmaStudio 3.3 and ADAU144x
When changing a value on the Clipper->HardClip->StanardClip the Capture window shows two 8 byte writes with the same data. Is this intentional? If so, do I need to do this too from my uP?
No, it doesn't have to be 8 bytes. There are 4 bytes for the upper limit and 4 bytes for the lower limit. You can write these independently from each other. However, if you happen to write the first 4 bytes in one audio frame and the second 4 bytes in the following audio frame, you'll have one frame where the audio output might not match your expectations.
The new formatting for the help file, which is currently only being used for new cells but will be used to revise the documentation on all other cells, will make the function and use of each stored parameter more clear.
When I use a hard clip cell with one channel in, one channel out, I'm seeing a normal 8-byte write; no duplicates.
However, when I grow the algorithm to two channels, I see what you're seeing... A duplicate write to the same address with the same data.
This is definitely not necessary and you shouldn't emulate it in your micro code. I'll report it to the software team. Thanks for pointing it out!
I suppose that leads me to my second question: Does it have to be an 8 byte write?
I see that the export data has those two data fields as two (always consecutive) addresses /w normal 4 byte data. It's treated as if the two fields are one entity when really they're probably two separate consecutive items, like a 2:1 mux. Other than the obvious speed benefit of writing the bigger block, is there any downside to doing two 4 byte transfers like normal?
Retrieving data ...