21 lines
543 B
Markdown
21 lines
543 B
Markdown
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# nextpnr-nexus notes
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### Constraints
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Currently the following PDC constraint styles are supported for IO constraints:
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```
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ldc_set_location -site {G13} [get_ports gsrn]
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ldc_set_port -iobuf {IO_TYPE=LVCMOS33} [get_ports {led[0]}]
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```
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Timing constraints are currently ignored, but should be expected to be supported soon.
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### Command Line
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A full device name is specified on the command line. It should be postfixed with 'ES' if using an engineering sample device to ensure correct use of the ES IDCODE.
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```
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--device LIFCL-40-9BG400CES
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```
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