6 commits

Author	SHA1	Message	Date
whitequark	c9879c795b	build.{dsl,res,plat}: apply clock constraints to signals, not resources. ... This adds the Clock() build DSL element, and adds a resource manager function add_clock_constraint() that takes a Pin or a Signal. Note that not all platforms, in particular not any nextpnr platforms at the moment, can add constraints on arbitrary signals. Fixes #86.	2019-06-05 08:52:30 +00:00
whitequark	ab3f103e5a	build.dsl: replace extras= with Attrs(). ... This change proved more tricky than expected due to downstream dependencies, so it also includes some secondary refactoring.	2019-06-05 07:02:08 +00:00
whitequark	4310254103	build.res: use ConstraintError iff a constraint invariant is violated. ... In particular don't use it for type errors.	2019-06-04 11:00:11 +00:00
whitequark	a013eb1f59	build.dsl: add support for connectors.	2019-06-03 13:47:00 +00:00
whitequark	b1eab9fb3b	build.plat: implement.	2019-06-01 16:43:27 +00:00
Jean-François Nguyen	dd5bd1c88d	build: add DSL for defining platform resources.	2019-04-24 11:49:01 +00:00