Updated check for interfaces created from PinSignature

Author: lanserge

chipflow_lib/steps/silicon.py

@@ -12,11 +12,11 @@
 
 import dotenv
 from amaranth import *
-from amaranth.lib.wiring import PureInterface
 
 from . import StepBase
 from .. import ChipFlowError
 from ..platforms import SiliconPlatform, top_interfaces, load_pinlock
+from ..platforms.utils import PinSignature
 
 
 logger = logging.getLogger(__name__)
@@ -48,7 +48,7 @@ def elaborate(self, platform: SiliconPlatform):
             for iface_name, member, in iface.items():
                 for name, port in member.items():
                     iface = getattr(top[component], iface_name)
-                    wire = (iface if isinstance(iface, PureInterface)
+                    wire = (iface if isinstance(iface.signature, PinSignature)
                             else getattr(iface, name))
                     platform.ports[port.port_name].wire(m, wire)
         return m