Graphics demos implemented using PipelineC.

This primarily consists of a ray tracing demo created using CflexHDL C code.

Work contained in these repositories is experimental and in active development. Please report any issues that are encountered.

A fully working interactive raytraced game written in C and translated to a circuit. No CPU is used, and the few resources used run at an outstanding power efficiency. Check out a demo video of gameplay on real hardware!

A detailed article describing this work is here

• Install clang 14

  wget https://apt.llvm.org/llvm.sh
  chmod  x llvm.sh
  sudo ./llvm.sh 14
  # Copy/link specific .so file to generic .so to avoid missing .so file error
  sudo cp /usr/lib/x86_64-linux-gnu/libclang-14.so.14.0.6 /usr/lib/x86_64-linux-gnu/libclang-14.so
  

• Install sdl2 lib, OpenMP, Un-If-Def Tool

  sudo apt install libsdl2-dev
  sudo apt install libomp-dev
  sudo apt install unifdef
  

• Clone repos adjacent to each other in one dir

  git clone https://github.com/JulianKemmerer/PipelineC-Graphics
  git clone https://github.com/suarezvictor/CflexHDL
  git clone https://github.com/JulianKemmerer/PipelineC
  

• Install open source EDA tools
  • https://github.com/YosysHQ/oss-cad-suite-build/releases

  export PATH="<extracted_location>/oss-cad-suite/bin:$PATH"
  

• Make CFlexHDL cflexparser

  cd CflexHDL/cflexparser
  make
  # may need to add '-fno-lto' to makefile to avoid
  #   fatal error: bytecode stream in file libpython3.8.a generated with LTO version 6.0 instead of the expected 8.1
  

• Install Litex
  • TODO more info...

Boards supported are the Digilent Arty-100T and the OrangeCrab 85F v0.2.

For the Arty: make clean BOARD=digilent_arty FRAME_WIDTH=1920 FRAME_HEIGHT=1080 load
For the OrangeCrab: make clean BOARD=gsd_orangecrab load (default 640x480 resolution, uses open source toolchain for synthesis)
You need to select DVI=True or DVI=False in litex_soc.py to output digital video or analog video with a VGA PMOD

Full pipelining can take some hours, for faster processing you can try simulation options like make sim, make gen, or make verilator

Social Media: @pipelinec_hdl @suarezvictor

Talk on Discord:

• Sphery vs. Shapes
• PipelineC
• Digital Design HQ
  • #hdl-other
  • #project-chat
  • #fpga