You should read the PIO section in the appropriate datasheet (RP2040 or RP2350) first. That _should_ take care of most questions because RP2040 has been out for a few years, so any ambiguity in the PIO specs would have been ironed out. There will be undefined stuff, and folks generally will not deliberately use undefined behaviour.
A hardware-centric mental model of the PIO would be important. Start with small program, then move forward in manageable steps. Avoid attempting a full-blown PIO program unless you are _really_ capable of doing it without drowning.
Of course someone else has probably already done it. Adafruit is big on NeoPixel stuff:
Adafruit Feather RP2040 SCORPIO - 8 Channel NeoPixel Driver
https://www.adafruit.com/product/5650
Or use a 74HC595 serial to parallel:
NeoPIO: Drive lots of LEDs with Raspberry Pi Pico
https://learn.adafruit.com/neopio-drive ... o/overview
Happy hacking!![:D]( "Very Happy")
A hardware-centric mental model of the PIO would be important. Start with small program, then move forward in manageable steps. Avoid attempting a full-blown PIO program unless you are _really_ capable of doing it without drowning.
Of course someone else has probably already done it. Adafruit is big on NeoPixel stuff:
Adafruit Feather RP2040 SCORPIO - 8 Channel NeoPixel Driver
https://www.adafruit.com/product/5650
Or use a 74HC595 serial to parallel:
NeoPIO: Drive lots of LEDs with Raspberry Pi Pico
https://learn.adafruit.com/neopio-drive ... o/overview
Happy hacking!
Statistics: Posted by katak255 — Sun Sep 14, 2025 12:25 am