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hub75-pio-rs

An experimental HUB75 driver for RP2040. Utilizes Programmable I/O (PIO) units in combination with DMA to achieve high refresh rates, true color depth and zero CPU overhead without sacrificing quality.

nyan.mp4

Features

  • Supports LED matrices up to 64x32 pixels with 1:16 scanline
  • High refresh rate (approx. 2100 Hz with 24 bit color depth on a 64x32 display)
  • Does not utilize CPU for clocking out data to the display – all the work is done by the PIOs and the DMA controller
  • Uses binary color modulation
  • Double buffered
  • Implements embedded-graphics traits

Requirements

The current implementation assumes that the following groups of data outputs are assigned to consecutive pins on the RP2040:

  • R1, G1, B1, R2, G2, B2
  • ADDRA, ADDRB, ADDRC, ADDRD