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| -rw-r--r-- | README.md | 7 |
1 files changed, 6 insertions, 1 deletions
@@ -71,11 +71,16 @@ make -j$(nproc) sudo make install ``` -- For an ECP5 blinky, first synthesise using `yosys blinky.ys` in `ecp5/synth`. + - For an ECP5 blinky, first synthesise using `yosys blinky.ys` in `ecp5/synth`. - Then run ECP5 place-and route using `./nextpnr-ecp5 --json ecp5/synth/blinky.json --basecfg ecp5/synth/ulx3s_empty.config --bit ecp5/synth/ulx3s.bit` - Note that `ulx3s_empty.config` contains fixed/unknown bits to be copied to the output bitstream - You can also use `--textcfg out.config` to write a text file describing the bitstream for debugging + - More examples of the ECP5 flow for a range of boards can be found in the [Project Trellis Examples](https://github.com/SymbiFlow/prjtrellis/tree/master/examples). + + - Currently the ECP5 flow supports LUTs, flipflops and IO. IO must be instantiated using `TRELLIS_IO` primitives and constraints specified + using `LOC` and `IO_TYPE` attributes on those instances, as is used in the examples. + ### nextpnr-generic The generic target allows to run place and route for an arbitrary custom architecture. |