I have a doubt regarding the use of DMA or CPU to access a UDB's accumulators:
AN82156 states "The accumulator registers operate asynchronously and may change at any time, including during CPU or
Is it safe to write into or read from the accumulators while the UDB is essentially just nop'ing around? I'd like to use D0 and D1 for static parameters used to process A0 and A1.
Yes，it is safe if you don't use UDB. But I think you should update the FIFO instead of using A0,A1.