Use new 'specials' API

diff --git a/mibuild/xilinx_ise.py b/mibuild/xilinx_ise.py
index a35ccf7db87f0334df9db136116658a78468074f..a8d65284c2600eece5b6db652ab3cd675c6c5480 100644 (file)
--- a/mibuild/xilinx_ise.py
+++ b/mibuild/xilinx_ise.py
@@ -31,7 +31,7 @@ class CRG_DS(CRG):
                        Instance.Input("IB", self._clk.n),
                        Instance.Output("O", self.cd.clk)
                )
-               return Fragment(instances=[ibufg])
+               return Fragment(specials={ibufg})
 
 def _format_constraint(c):
        if isinstance(c, Pins):