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diff --git a/pb_APP_log_comb.srcs/sources_1/new/Mux.vhd b/pb_APP_log_comb.srcs/sources_1/new/Mux.vhd
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+-------------------------------------------------------------------------------
+-- Company:
+-- Engineer:
+--
+-- Create Date: 05/03/2025 08:02:39 PM
+-- Design Name:
+-- Module Name: Mux - Behavioral
+-- Project Name:
+-- Target Devices:
+-- Tool Versions:
+-- Description:
+--
+-- Dependencies:
+--
+-- Revision:
+-- Revision 0.01 - File Created
+-- Additional Comments:
+--
+-------------------------------------------------------------------------------
+
+
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+
+-- Uncomment the following library declaration if using
+-- arithmetic functions with Signed or Unsigned values
+--use IEEE.NUMERIC_STD.ALL;
+
+-- Uncomment the following library declaration if instantiating
+-- any Xilinx leaf cells in this code.
+--library UNISIM;
+--use UNISIM.VComponents.all;
+
+entity Mux is port (
+    ADCbin     : in  STD_LOGIC_VECTOR (3 downto 0);
+    Dizaines   : in  STD_LOGIC_VECTOR (3 downto 0);
+    Unites_ns  : in  STD_LOGIC_VECTOR (3 downto 0);
+    Code_signe : in  STD_LOGIC_VECTOR (3 downto 0);
+    Unite_s    : in  STD_LOGIC_VECTOR (3 downto 0);
+    BTN        : in  STD_LOGIC_VECTOR (2 downto 0);
+    erreur     : in  STD_LOGIC;
+    S1         : in  STD_LOGIC;
+    S2         : in  STD_LOGIC;
+    DAFF0      : out STD_LOGIC_VECTOR (3 downto 0);
+    DAFF1      : out STD_LOGIC_VECTOR (3 downto 0));
+end Mux;
+
+architecture Behavioral of Mux is
+
+  constant pressed : STD_LOGIC := '1';
+
+  constant msg_Err   : STD_LOGIC_VECTOR(9 downto 0)   := "01110" & "10001";
+  -- constant char_neg  : STD_LOGIC_VECTOR(4 downto 0) := "10000";
+  -- constant char_ndef : STD_LOGIC_VECTOR(4 downto 0) := "10010";
+
+  signal break : BOOLEAN := FALSE;
+
+  signal unit_input_buf  : STD_LOGIC_VECTOR(4 downto 0);
+  signal tens_input_buf  : STD_LOGIC_VECTOR(4 downto 0);
+
+  signal unit_sim_sink : string(1 to 1);
+  signal tens_sim_sink : string(1 to 1);
+
+  component septSegments_encodeur is Port(
+    i_AFF : in  STD_LOGIC_VECTOR(3 downto 0);  -- caractère à afficher
+    o_Seg : out STD_LOGIC_VECTOR(6 downto 0);  -- encodage 7-segments
+    o_CharacterePourSim : out string(1 to 1)); -- pour simulation seulement
+  end component;
+
+begin
+
+  unit_converter : septSegments_encodeur port map (
+    i_AFF => unit_input_buf,
+    o_Seg => DAFF0,
+    o_CharacterePourSim => unit_sim_sink);
+
+  tens_converter : septSegments_encodeur port map (
+    i_AFF => tens_input_buf,
+    o_Seg => DAFF1,
+    o_CharacterePourSim => tens_sim_sink);
+
+  decide : process
+    begin
+      -- HANDLE SWITCHES {{{
+      if S2 = pressed then
+        break <= TRUE; -- Avoids double printing on 7seg
+        unit_input_buf <= msg_Err(9 downto 5);
+        tens_input_buf <= msg_Err(4 downto 0);
+      else
+        if S1 = pressed then
+          -- TODO: parité paire sur LD0 (Zybo) et DEL2 (carte thermo)
+        else
+          -- TODO: parité impaire sur LD0 (Zybo) et DEL2 (carte thermo)
+        end if;
+      end if;
+      -- }}}
+      -- HANDLE BUTTONS {{{
+      if break = FALSE then
+        case (BTN) is
+          when "00" =>
+             -- TODO: BCD sur 7Seg.
+          when "01" =>
+             -- TODO: Hex sur 7Seg.
+          when "10" =>
+             -- TODO: (BCD-5) sur 7Seg.
+          when "11" =>
+            unit_input_buf <= msg_Err(9 downto 5);
+            tens_input_buf <= msg_Err(4 downto 0);
+          when others =>
+            unit_input_buf <= msg_Err(9 downto 5);
+            tens_input_buf <= msg_Err(4 downto 0);
+       end case;
+      end if;
+      -- }}}
+
+  end process;
+
+end Behavioral;