From 89106873db3762607d5896f20457c889909e333e Mon Sep 17 00:00:00 2001 From: Florent Kermarrec Date: Tue, 2 Jun 2020 13:34:09 +0200 Subject: [PATCH] build/generic_platform: add default_clk constraints only when used. --- litex/build/generic_platform.py | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/litex/build/generic_platform.py b/litex/build/generic_platform.py index 7c489efea..2fdda7184 100644 --- a/litex/build/generic_platform.py +++ b/litex/build/generic_platform.py @@ -278,6 +278,7 @@ class GenericPlatform: self.verilog_include_paths = [] self.output_dir = None self.finalized = False + self.use_default_clk = False def request(self, *args, **kwargs): return self.constraint_manager.request(*args, **kwargs) @@ -313,6 +314,7 @@ class GenericPlatform: "No default clock and no clock domain defined") crg = CRG(self.request(self.default_clk_name)) fragment += crg.get_fragment() + self.user_default_clk = True self.do_finalize(fragment, *args, **kwargs) self.finalized = True @@ -320,7 +322,7 @@ class GenericPlatform: def do_finalize(self, fragment, *args, **kwargs): """overload this and e.g. add_platform_command()'s after the modules had their say""" - if hasattr(self, "default_clk_period"): + if self.use_default_clk: try: self.add_period_constraint( self.lookup_request(self.default_clk_name),