The following VHDL is to be used to test bench. I keep getting an error on the first wait statement during analysis : "wait statement must contain condition clause with UNTIL keyword" I have several working test benches written this way. I can't seem to find what the error might be.
`library IEEE;
USE IEEE.std_logic_1164.all;
entity case_ex_TB is end;
architecture simple_test of case_ex_TB is
--- DUT Component Declaration ---
component case_ex
port(
clk, rstN: IN std_logic;
color: OUT std_logic_vector(2 downto 0));
end component;
--- Signals Declaration ---
signal rst, clock: std_logic:='0';
signal color: std_logic_vector(2 downto 0);
begin
DUT: case_ex --- DUT instantiation ---
port map (clk => clock,
rstN => rst,
color => color);
--- Signal's Waves Creation ---
rst <= '1','0' after 50 ns, '1' after 2 us;
clock_crtate: process
begin
while rst = '0' loop
clock <= '1','0' after 50 ns;
wait for 100 ns;
end loop;
clock <= '1';
wait;
end process;
end simple_test;`
