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yosys/tests/sva/basic04.vhd
2017-07-22 16:35:46 +02:00

27 lines
450 B
VHDL

library ieee;
use ieee.std_logic_1164.all;
entity top is
port (
clock : in std_logic;
ctrl : in std_logic;
x : out std_logic
);
end entity;
architecture rtl of top is
signal read : std_logic;
signal write : std_logic;
signal ready : std_logic;
begin
process (clock) begin
if (rising_edge(clock)) then
read <= not ctrl;
write <= ctrl;
ready <= write;
end if;
end process;
x <= read xor write xor ready;
end architecture;