Module bitplane 

Bitplane-oriented framebuffer implementations for HUB75 LED panels.

These framebuffers store colour data as one bit-plane per colour bit (typically 8 planes for full 8-bit colour). To render, configure the DMA descriptor chain to output each plane 2^(7 - plane_index) times so that the weighted repetition counts produce correct BCM brightness.

Two variants are provided:

• plain – 16-bit entries with all signals (address, latch, OE, colour) packed into each word. No external latch circuit needed.
• latched – 8-bit entries with separate address bytes, requiring an external latch circuit but halving per-entry memory.

Modules

latched

Bitplane framebuffer for an 8-bit latched HUB75 interface.

plain

Bitplane framebuffer for a 16-bit plain HUB75 interface.