From 4a43b7c66d3f5e0e7933391921c2dba2eec84426 Mon Sep 17 00:00:00 2001
From: Gaetan Leplus <gaetan.leplus@airbus.com>
Date: Tue, 26 Mar 2019 14:36:07 +0100
Subject: [implem-vhdl] Ajout des sources VHDL

---
 .../machine_etat_chiffrement.vhd                   | 95 ++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 implementations/vhdl/Encrypt/lilliputtbcii192v1/machine_etat_chiffrement.vhd

(limited to 'implementations/vhdl/Encrypt/lilliputtbcii192v1/machine_etat_chiffrement.vhd')

diff --git a/implementations/vhdl/Encrypt/lilliputtbcii192v1/machine_etat_chiffrement.vhd b/implementations/vhdl/Encrypt/lilliputtbcii192v1/machine_etat_chiffrement.vhd
new file mode 100644
index 0000000..a79b759
--- /dev/null
+++ b/implementations/vhdl/Encrypt/lilliputtbcii192v1/machine_etat_chiffrement.vhd
@@ -0,0 +1,95 @@
+library IEEE;
+library work;
+use IEEE.numeric_std.all;
+use IEEE.std_logic_1164.all;
+use work.crypt_pack.all;
+
+entity fsm_chiffrement is port (
+    start_i : in std_logic;
+    clock_i : in std_logic;
+    reset_i : in std_logic;
+    compteur_o : out std_logic_vector(7 downto 0);
+    liliput_on_out : out std_logic; --Sortie à titre informative
+    data_out_valid_o : out std_logic; --Vient à l'entrée du round exe pour s 
+    permutation_o : out std_logic;
+    muxsel_o : out std_logic);
+end fsm_chiffrement;
+
+architecture fsm_chiffrement_arch of fsm_chiffrement is
+
+type state is (etat_initial, firstround, loopround, lastround);
+
+signal present, futur : state;
+signal compteur : integer range 0 to ROUND;
+
+begin
+
+compteur_o <= std_logic_vector(to_unsigned(compteur,8));
+
+process_0 : process(clock_i,reset_i,compteur)
+begin
+	if reset_i = '0' then
+		compteur <= 0;
+		present <= etat_initial; 
+		elsif clock_i'event and clock_i='1' then
+		present <= futur;
+		if (present = firstround or present =loopround) then 
+		compteur <= compteur+1;
+		else
+			compteur <= 0;
+		end if;
+	end if;
+
+end process process_0;
+
+
+process_1 : process(present, start_i, compteur) 
+begin 
+	case present is
+		when etat_initial => 
+			if start_i = '1' then
+				futur <= firstround;
+			else 
+				futur <= present;
+			end if;
+		when firstround =>
+			futur <= loopround; 
+		when loopround =>
+			if compteur = ROUND then
+				futur <= lastround; 
+			else 
+				futur<=present;
+			end if;
+		when lastround =>
+			futur<=etat_initial;
+	end case;
+end process process_1;
+
+process_2 : process(present)
+
+begin 
+	case present is
+		when etat_initial =>
+			liliput_on_out <= '0';
+			data_out_valid_o <= '0';
+			permutation_o <= '0';
+			muxsel_o <= '1';
+		when firstround =>
+			liliput_on_out <= '1';
+			data_out_valid_o <= '0'; 
+			permutation_o <= '1';
+			muxsel_o <= '1';
+		when loopround =>
+			liliput_on_out <= '1';
+			data_out_valid_o <= '0';
+			permutation_o <= '1';
+			muxsel_o <= '0';
+		when lastround =>
+			liliput_on_out <= '1';
+			data_out_valid_o <= '1';
+			permutation_o <= '0';
+			muxsel_o <= '0';
+	end case;
+end process process_2;
+
+end architecture fsm_chiffrement_arch;
\ No newline at end of file
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