Various modules in micropython for rp2040 (and successors), mostly using PIOs for high-speed data transfer
The python modules here use various features of the Raspberry Pi embedded processors, such as the RP2040. In particular, most of these of focused on input/output using the PIO units to handle protocols.
Right now, they are in first-upload status. They are highly functional, but only have partial docstrings describing them. There is sample at the bottom showing how they can be used.