Node * determined to be a clock

Hello Kaz,

and thanks for your reply!

challenge_dr is just used as internal signal in controller. As my code snippet shows, it is passed out of controller through challenge_out.

challenge_out[3..0] and challenge_out[7..4] are each used as select-inputs of two 16-bit MUXes.

Interestingly, I only get the warning for challenge_dr[0] and challenge_dr[4].

So is the MUX causing the waring? Here is its code:

--------------------------------------------------------------------
--
--	MUX Parameterized Megafunction
--
INCLUDE "lpm_mux.inc";
PARAMETERS
(
	WIDTH,
	WIDTHS = CEIL(LOG2(WIDTH))
);
SUBDESIGN mux
(
	data	: INPUT;
	sel	: INPUT;
	result				: OUTPUT;
)
BEGIN
	result = lpm_mux(.data=data, .sel=sel) 
		WITH (LPM_WIDTH = 1, LPM_SIZE = WIDTH, LPM_WIDTHS = WIDTHS);
	IF !USED(result) GENERATE
		result = GND;
	END GENERATE;
END;