ABC80/max80_fw

réplica de https://git.zytor.com/abc80/max80/fw.git/

Autor	SHA1 Mensaxe	Data
H. Peter Anvin	9ac4e30722 time: synchronize all clocks: RTC, SNTP, ESP, FPGA/ABC	%!s(int64=2) %!d(string=hai) anos
H. Peter Anvin	50f7f572a3 WIP: ringbuffer system between ESP32 and FPGA	%!s(int64=2) %!d(string=hai) anos
H. Peter Anvin	d0c6ce11ed rv32: rename fw.h -> common.h for consistency	%!s(int64=2) %!d(string=hai) anos