There are 2 repositories under sipeed-tang-nano4k topic.
New clean hdmi implementation for ulx3s, icestick, icoboard, arty7, colorlight i5 and blackicemx! With tmds encoding hacked down from dvi standard. Supports DDR and SRD tranfser!
Tutorials centred around Gowin FPGA parts for the /r/GowinFPGA subreddit
Open-source HDMI/DVI transmitter for the Gowin GW1NSR-powered Tang Nano 4K
TangNano-4K-example project with opensource hdmi tmds implementation
Simple library to interface with Hitachi-compatible character LCDs for the Sipeed Tang Nano 4K Gowin FPGA board.
Simple Verilog interface for the PUYA P25Q32H flash chip of the Tang Nano 4K board
Example AHB-lite LED peripheral for the Nano 4K board with embedded Cortex M3 core
Quad-digit 7-segment driver with BCD encoder for the Tang Nano 4K