Add initial implementations for various audio processing components

- Created LFO entity for low-frequency oscillation control.
- Added all_pass_filter entity for signal processing.
- Implemented balance_controller for audio balance adjustments.
- Developed debouncer to stabilize input signals.
- Introduced digilent_jstk2 for joystick data handling.
- Added edge_detector_toggle for edge detection functionality.
- Created effect_selector to manage audio effects based on joystick input.
- Implemented jstk_uart_bridge for communication between joystick and UART.
- Developed led_controller for LED management.
- Introduced led_level_controller for controlling multiple LEDs.
- Created moving_average_filter for smoothing input signals.
- Added moving_average_filter_en with enable functionality.
- Implemented mute_controller to handle mute functionality.
- Developed volume_controller for volume adjustments.
- Introduced volume_multiplier for scaling audio signals.
- Created volume_saturator to ensure audio signals stay within bounds.

LAB3/src/led_level_controller.vhd

@@ -0,0 +1,60 @@
+----------------------------------------------------------------------------------
+-- Company: 
+-- Engineer: 
+-- 
+-- Create Date: 22.05.2021 15:42:35
+-- Design Name: 
+-- Module Name: led_level_controller - 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 led_level_controller is
+    generic(
+        NUM_LEDS : positive := 16;
+        CHANNEL_LENGHT  : positive := 24;
+        refresh_time_ms: positive :=1;
+        clock_period_ns: positive :=10
+    );
+    Port (
+        
+        aclk			: in std_logic;
+        aresetn			: in std_logic;
+        
+        led    : out std_logic_vector(NUM_LEDS-1 downto 0);
+
+        s_axis_tvalid	: in std_logic;
+        s_axis_tdata	: in std_logic_vector(CHANNEL_LENGHT-1 downto 0);
+        s_axis_tlast    : in std_logic;
+        s_axis_tready	: out std_logic
+
+    );
+end led_level_controller;
+
+architecture Behavioral of led_level_controller is
+
+begin
+
+end Behavioral;