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Update README.md wrt ECP5

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Signed-off-by: David Shah <davey1576@gmail.com>
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David Shah 2018-07-29 14:17:02 +02:00
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README.md
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@ -76,6 +76,11 @@ sudo make install
- Note that `ulx3s_empty.config` contains fixed/unknown bits to be copied to the output bitstream - 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 - 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 ### nextpnr-generic
The generic target allows to run place and route for an arbitrary custom architecture. The generic target allows to run place and route for an arbitrary custom architecture.