Re:The RP2040 Stamp
by puzzlingcaptcha on Sunday March 27, 2022 @03:35AM
(#30818446)
Can you recommend some PIO tutorials that go beyond the simple example in the SDK?
Here is a posting about driving an LCD. It starts with a bitbanged version and goes through rewriting it using PIO and thereby reducing CPU usage from full load to "almost negligible". Maybe that's an interesting read?
You've got 2 sets of 4 state machines, that can do a whole lot of stuff at really impressive I/O rates. People have used them to generate VGA or DVI (HDMI) with just some resistors and connectors.
It's almost as good as having an FPGA. I suspect people will be wringing more and more performance out of this chip over the next year or two.