Lattice / SiliconBlue iCE40 FPGAs

devices - iCE40 FPGA devices. The devices architecture descriptions have approximations of the real fabric, to get real fabric you have to override the rr_graph.xml file.
- devices/layouts - Tile layout descriptions for devices.
- devices/tile-routing-virt - Version of architecture which uses;
  - Local tracks inside a tile.
  - Fake fabric which "approximates" the real fabric inside the iCE40.
- devices/top-routing-virt - Version of architecture which uses;
  - Local tracks at rr_graph level.
  - Fake fabric which "approximates" the real fabric inside the iCE40.
primitives/ - The primitives that make up the iCE40. These are generally used inside the tiles.
tiles/ - The tiles found in the iCE40 architecture. The iCE40 only really have 3 tile types,
- tiles/plb - Logic tiles, called PLBs
- tiles/pio - IO tiles, called PIOs
- tiles/block_ram - Block Ram tiles, which don't really have a name.

Status