Using Raspberry Pi Pico PIO to drive STN LCD displays #PiDay @Raspberry_Pi @zephray_wenting

STN LCD displays look great but finding chips to drive them is getting impossible. Wenting’s Web Page describes using the PIO on a Raspberry Pi Pico, along with DMA, to do all the heavy lifting, leaving the CPU free to do other things, step by step.

This blog shows how to leverage the PIO found on RP2040 to drive a not-so-common type of display. Combined with the large SRAM found on the RP2040, this is quite usable. As I mentioned before I am a beginner who just started learning RP2040, the method presented here is almost certainly doesn’t make full use of the PIO and could be further optimized. All code provided is licensed under MIT license, take them if they turn out to be helpful for your project. Thanks for reading.

Full source code available at: https://gist.github.com/zephray/cb9340d278ed2ab6eb47398d2ca29b3c

Read the post here for the entire runthrough.


Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards

Join Adafruit on Mastodon

Adafruit is on Mastodon, join in! adafruit.com/mastodon

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Join over 36,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — Philips, an electronics giant, has faded from its former glory

Wearables — Capture sounds

Electronics — Audio amplifier advice

Python for Microcontrollers — Python on Microcontrollers Newsletter: MicroPython Pico W Bluetooth, CircuitPython 8.0.4 and much more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

Adafruit IoT Monthly — Boxing Glove Tracker, Disconnecting Smart Appliances, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — #NewProducts 3/15/23 Feat. Adafruit CAN Bus FeatherWing – MCP2515!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.