i had posted that same research earlier in previous posts and had tried it out but it had a few issues and also it still needs to communicate with BM1397 chip, will look at it later . Also we need a way of finding out the status of work on chip then roll extra nonce and send another as you said. Is using the a timer to wait for response from the chip good enough considering all the constraints we are facing?
Ah! Maybe that's how I found it. Interesting paper. I like the breakdown of the mining algorithm.
As far as the status of work on the chip, I'm sure Kano knows more. My understanding is that the BM1397 does not send
any response unless it finds a hash below the target. That means it is the job of the mining software to know when the chip has exhausted the 2^32 bit nonce space. It's unclear what the BM1397 does after hashing the entire nonce space, but I don't think it's productive. Using a ESP32 timer and the configured hashing frequency, we should be able to know when the chip is ready for new work.
I think it makes sense to have a separate RTOS thread/task listening to, parsing and acting on BM1397 responses. Low latency with good hashes seems important!