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Honored ContributorError (10818): Can't infer register for "etat[1]" because it does not hold its value
Hello, I have to write a VHDL code for a project.
I try to describe a game which consist in find the right number and entering it on a 3x4 keyboard. I'm a debutant! And I can't determine why I have those errors:
Error (10818): Can't infer register for "etat" at projet1.vhd(35) because it does not hold its value outside the clock edge
Info (10041): Inferred latch for "etat" at projet1.vhd(31)
Error (10818): Can't infer register for "etat" at projet1.vhd(35) because it does not hold its value outside the clock edge
Info (10041): Inferred latch for "etat" at projet1.vhd(31)
Error (10818): Can't infer register for "l_vert" at projet1.vhd(35) because it does not hold its value outside the clock edge
Info (10041): Inferred latch for "l_vert" at projet1.vhd(31)
Error (10818): Can't infer register for "l_rouge" at projet1.vhd(35) because it does not hold its value outside the clock edge
Info (10041): Inferred latch for "l_rouge" at projet1.vhd(31)
Error (10818): Can't infer register for "l_jaune" at projet1.vhd(35) because it does not hold its value outside the clock edge
Info (10041): Inferred latch for "l_jaune" at projet1.vhd(31)
Error (10822): HDL error at projet1.vhd(35): couldn't implement registers for assignments on this clock edge
Error (12153): Can't elaborate top-level user hierarchyError: Quartus Prime Analysis & Synthesis was unsuccessful.
7 errors, 16 warnings
Error: Peak virtual memory: 644 megabytes
Error: Processing ended: Sun Apr 30 15:40:11 2017
Error: Elapsed time: 00:00:32
Error: Total CPU time (on all processors): 00:01:08
library ieee;
use ieee.std_logic_1164.all;
use ieee.math_real.all;
use ieee.numeric_std.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
entity projet1 is
port (
clk, c2, c1, c0, start,l3,l2,l1,l0, reset : in std_logic; -- Entrées
D, U, bcd_u, bcd_d : buffer std_logic_vector(3 downto 0); -- Valeurs intermédiaires
l_jaune, l_rouge, l_vert : buffer std_logic --LEDs );
end entity projet1;
architecture behaviour of projet1 is
signal count_d : std_logic_vector(3 downto 0) := "0000"; -- vecteur 4 bits des dizaines
signal count_u : std_logic_vector(3 downto 0) := "0000"; -- vecteur 4 bits des unités
signal touche : std_logic;
signal colnum : integer range 0 to 2;
signal sortie : std_logic_vector(3 downto 0);
signal etat : std_logic_vector (0 to 1) := "00"; -- Machine d'états --modif: signal donc <=
constant l_start : std_logic := '1'; -- Led d'allummage
signal cnt : std_logic := '0' ;
begin
process (reset, clk)
begin
if ( rising_edge (clk)) then -- Compteur de 1 à 99
if count_u = "1010" then
count_u <= "0000" ;
count_d <= count_d + 1;
if count_d = "1010" then
count_d <= "0000" ;
end if;
else
count_u <= count_u + 1;
end if;
if (etat = "00") then
-- Initialisation
-- des leds
l_jaune <= '0';
l_rouge <= '0';
l_vert <= '0';
-- de l'afficheur 7 segments
bcd_u <= "0000";
bcd_d <= "0000";
-- On passe à l'état suivant
etat <= "01";
elsif (etat = "01") then -- On attend que le joueur appuie sur Start pour définir le nombre à trouver
if (start = '1' ) then -- /!\ Bouton poussoir! Code anti-rebonds
D <= count_d ;
U <= count_u ;
etat <= "10"; -- On passe alors à l'état suivant
end if;
elsif (etat = "10") then -- Décodeur clavier
if c0='1' and c1='1' and c2='1' then
touche <='1'; -- Pas de touche enfoncée
else touche <='0'; -- Une touche est enfoncée
if (l0='0' and c0='0') then
sortie <="0001"; -- Touche 1
elsif (l0='0' and c1='0') then
sortie <="0010"; --Touche 2
elsif (l0='0' and c2='0') then
sortie <="0011"; --Touche 3
elsif (l1='0' and c0='0') then
sortie <="0100"; --Touche 4
elsif (l1='0' and c1='0') then
sortie <="0101"; --Touche 5
elsif (l1='0' and c2='0') then
sortie <="0110"; --Touche 6
elsif (l2='0' and c0='0') then
sortie <="0111"; --Touche 7
elsif (l2='0' and c1='0') then
sortie <="1000"; --Touche 8
elsif (l2='0' and c2='0') then
sortie <="1001"; --Touche 9
elsif (l3='0' and c0='0') then
sortie <="1010"; --Touche *(->A)
elsif (l3='0' and c1='0') then
sortie <="0000"; --Touche 0
elsif (l3='0' and c2='0') then
sortie <="1011"; --Touche# (->B)
end if;
if (cnt = '0') then -- chiffre des dizaines
bcd_d <= sortie ;
cnt <= '1';
else -- chiffre des unités
bcd_u <= sortie ;
cnt <= '0';
end if ;
end if;
end if;
etat <= "11";
elsif (etat = "11") then
if bcd_d > D then
l_rouge <= '1';
etat <= "10";
elsif bcd_d < D then
l_jaune <= '1';
etat <= "10";
elsif bcd_d = D then
if bcd_u > U then
l_rouge <= '1';
etat <= "10";
elsif bcd_u < U then
l_jaune <= '1';
etat <= "10";
elsif bcd_u = U then
l_vert <= '1';
etat <= "00";
end if;
end if;
end if;
end process;
end architecture behaviour;
