Error 10500

LIBRARY IEEE;

use IEEE.std_logic_1164.all;

use IEEE.std_logic_unsigned.all;

use ieee.numeric_std.all;

ENTITY brake_var IS

port (

clk : in std_logic;

reset : in std_logic;

chip_select : in std_logic;

writedata : in std_logic_vector (31 downto 0);

write_n : in std_logic;

address : in std_logic;

readdata : out std_logic_vector (31 downto 0);

out_port1 : out std_logic_vector (7 downto 0);

out_port2 : out std_logic_vector (7 downto 0));

END brake_var;

ARCHITECTURE brake_system OF brake_var IS

signal D : unsigned (31 downto 0); -- distance d'arrêt

signal v : unsigned (31 downto 0); -- vitesse du véhicule

signal Dmax : unsigned (31 downto 0); -- vitesse max (danger)

signal tb : std_logic;

signal brake : std_logic;

BEGIN

readdata <= std_logic_vector(D) when address = '0' else std_logic_vector(v);

registers: PROCESS (clk, reset)

BEGIN

if reset = '0' then

D <= (others =>'0');

v <= (others =>'0');

elsif clk'event and clk = '1' then

if chip_select ='1' and write_n = '0' then

if address = '0' then

D (31 downto 0) <= unsigned(writedata (31 downto 0));

else v (15 downto 0) <= unsigned(writedata (15 downto 0));

end if;

end if;

end if;

END PROCESS;

distance : PROCESS (clk,reset)

begin

if reset = '0' then

D <= (others =>'0');

elsif clk'event and clk='1' then

D(31 downto 0) <= (v(15 downto 0)*3)/10 + (v(15 downto 0)*v(15 downto 0))/100;

else

D <= (others =>'0');

end if;

END PROCESS;

tableau_de_bord : PROCESS (clk,reset)

begin

if reset = '0' then

tb <= '0';

elsif clk'event and clk='1' then

if

D < Dmax then tb <= '0' ;

else

tb <='1' ;

end if ;

end if;

end process;

frein : PROCESS (clk,reset)

begin

if reset = '0' then

brake <= '0';

elsif clk'event and clk='1' then

if tb = '0'

then brake <= '0';

else brake <='1'; -- freinage

end if;

end if;

END PROCESS;

out_port1 <= (others=> tb);

out_port2 <= (others=> brake);

END brake_system ;