Build a 2-bit Gray counter which counts in the usual sequence:


The counter should have a synchronous reset signal which resets the value to 0.

While it is possible to define a Gray code using the bits of a binary counter, you should solve this problem by defining a state machine where each value is a state and the transitions are unconditional. You'll probably want to use a case statement to define the states and the corresponding transitions. Don't forget the when others term!

library IEEE; use IEEE.std_logic_1164.all; entity gray2 is port( clk : in std_logic; reset : in std_logic; count : out std_logic_vector(1 downto 0) ); end gray2; architecture synth of gray2 is begin count <= 2d"0"; end;

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Compiler/test output: