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nextpnr
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2 Commits

Author SHA1 Message Date
YRabbit df13104384 gowin: Himbaechel. Add extra chip data 
To implement unusual IOs that have a dynamically changing configuration
 it is convenient to store the switching method in the additional chip
 data.

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
 2023-08-31 08:28:09 +02:00
YRabbit 6cac19c055 gowin: Himbaechel. Add constraint file processing. 
- minor fixes for pinout saving;
- CST parser taken from generic-based apicula;
- $nextpnr IOB detachment is copied here because it is necessary to copy
  attributes from deleted bels.

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
 2023-08-31 08:28:09 +02:00