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

• BELs
  • [ ] LUT+FF
    • [X] LUT
    • [X] FF modes (need to test all modes)
    • [ ] Carry chains
  • [ ] IO
    • [X] Simple Input
    • [X] Simple Output
    • [ ] Tri-state
    • [ ] LVDS
    • [ ] Global Buffer
  • [X] RAM40_4K
  • [ ] DSP
  • [ ] PLL
  • [ ] iCEGATE
  • [ ] Warmboot
• Routing
  • [ ] ColBuf (currently all are turned on)
  • [ ] Global
  • [ ] Negihborhood
• Timing
  • [ ] BEL
  • [ ] Routing