Refactor volume_saturator VHDL code for improved readability and structure; update project files for consistent path references and disable unused components in lab3 design.

LAB3/src/led_controller.vhd

@@ -1,22 +1,37 @@
-library IEEE;
-use IEEE.STD_LOGIC_1164.ALL;
+LIBRARY IEEE;
+USE IEEE.STD_LOGIC_1164.ALL;
 
-entity led_controller is
-	Generic (
-		LED_WIDTH		: positive := 8
+ENTITY led_controller IS
+	GENERIC (
+		LED_WIDTH : POSITIVE := 8
 	);
-	Port (
-		mute_enable		: in std_logic;
-		filter_enable	: in std_logic;
+	PORT (
+		mute_enable : IN STD_LOGIC;
+		filter_enable : IN STD_LOGIC;
 
-		led_r			: out std_logic_vector(LED_WIDTH-1 downto 0);
-		led_g			: out std_logic_vector(LED_WIDTH-1 downto 0);
-		led_b			: out std_logic_vector(LED_WIDTH-1 downto 0)
+		led_r : OUT STD_LOGIC_VECTOR(LED_WIDTH - 1 DOWNTO 0);
+		led_g : OUT STD_LOGIC_VECTOR(LED_WIDTH - 1 DOWNTO 0);
+		led_b : OUT STD_LOGIC_VECTOR(LED_WIDTH - 1 DOWNTO 0)
 	);
-end led_controller;
+END led_controller;
 
-architecture Behavioral of led_controller is
+ARCHITECTURE Behavioral OF led_controller IS
 
-begin
+	-- constant for "ON" and "OFF"
+	CONSTANT ALL_ON : STD_LOGIC_VECTOR(LED_WIDTH - 1 DOWNTO 0) := (OTHERS => '1');
+	CONSTANT ALL_OFF : STD_LOGIC_VECTOR(LED_WIDTH - 1 DOWNTO 0) := (OTHERS => '0');
 
-end Behavioral;
+BEGIN
+
+	-- If mute_enable = '1'       Red LEDs on, others off
+	-- Else if filter_enable='1'  Blue LEDs on, others off
+	-- Else                       Green LEDs on, others off
+
+	led_r <= ALL_ON WHEN mute_enable = '1' ELSE
+		ALL_OFF;
+	led_b <= ALL_ON WHEN (mute_enable = '0' AND filter_enable = '1') ELSE
+		ALL_OFF;
+	led_g <= ALL_ON WHEN (mute_enable = '0' AND filter_enable = '0') ELSE
+		ALL_OFF;
+
+END Behavioral;