Re: [EE] Saving "printf" arguments for later? Real-time on slow processor.

I ended up doing a benchmark of the snprintf wrapper that I supply to the
library. I give it 8 large 32 bit numbers (1 hex, and 7 decimal). I found
it takes 10000 cycles (~1ms) round trip to write the formatted string into
the buffer.

The library can easily do 10 of these in a row within the "critical
section", which would take about 10ms, it is not surprising it was failing
to reliably hit a ~1ms window. I would bet different numbers could result
in substantially different speeds.

I determined that I actually need to get through the function call in less
than 500 cycles - which I think I'll be able to do by saving the format
string and all the arguments to a FIFO for later processing. (roughly 64
bytes of format string, and 32 bytes of numbers)