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library ieee;
use ieee.std_logic_1164.all;
entity heartbeat is
port ( clk: out std_logic);
end heartbeat;
architecture behaviour of heartbeat
is
constant clk_period : time := 10 ns;
begin
-- Clock process definition
clk_process: process
begin
clk <= '0';
wait for clk_period/2;
clk <= '1';
wait for clk_period/2;
end process;
end behaviour;
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