Nitro HUB75 LED panel driver FPGA core

This core allows to drive LED panel chains using the 'classic' HUB75 protocol. The default top level contains a frame buffer but it's also possible to re-use the lower level components to drive a display without the need for a full frame buffer and just generate the pixel data 'just-in-time'.

The LEDS are modulated using Binary Coded Modulation which allow to efficiently vary their intensity efficiently. This video by Mike Harisson explains the concept of BCM very well.

The geometry of the panel and various aspecs are fully configurable through parameters given to the cores.

See the doc/ directory for more information about the internals of this core.

Limitations

The current code in this repo targets the iCE40 only and uses some direct SB_IO and SB_RAM_4K instances. I have run a modified version on ECP5 but haven't yet merged the changes here. If you're interested in using this core on another architecture, don't hesitate to contact me, the changes are fairly minor.

License

The cores in this repository are licensed under the "CERN Open Hardware Licence Version 2 - Weakly Reciprocal" license.

See LICENSE file for full text.