ID:13039 The following bidirectional pins have no drivers
CAUSE: The design has one or more bidirectional pins that have no driver - that is, they are behaving as input pins.
For example, the following Verilog design gives this warning for the pin bidir:
module test2 (inout bidir, output out); assign out = bidir; endmodule
ACTION: Declare the pins as input pins instead of bidirectional pins. See the sub-messages below to view the list of such bidirectional pins.