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Refactor code structure for improved readability and maintainability

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This commit is contained in:
Davide Cavagnola
2025-05-17 20:03:03 +02:00
parent cb57866a2e
commit c5d238ec94
6 changed files with 488 additions and 116 deletions
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178
LAB3/src/LFO.vhd
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@@ -1,40 +1,154 @@
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
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;
USE IEEE.NUMERIC_STD.ALL;
entity LFO is
generic(
CHANNEL_LENGHT : integer := 24;
JOYSTICK_LENGHT : integer := 10;
CLK_PERIOD_NS : integer := 10;
TRIANGULAR_COUNTER_LENGHT : integer := 10 -- Triangular wave period length
ENTITY LFO IS
GENERIC (
CHANNEL_LENGHT : INTEGER := 24;
JOYSTICK_LENGHT : INTEGER := 10;
CLK_PERIOD_NS : INTEGER := 10;
TRIANGULAR_COUNTER_LENGHT : INTEGER := 10 -- Triangular wave period length
);
Port (
aclk : in std_logic;
aresetn : in std_logic;
lfo_period : in std_logic_vector(JOYSTICK_LENGHT-1 downto 0);
lfo_enable : in std_logic;
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;
m_axis_tvalid : out std_logic;
m_axis_tdata : out std_logic_vector(CHANNEL_LENGHT-1 downto 0);
m_axis_tlast : out std_logic;
m_axis_tready : in std_logic
);
end entity LFO;
PORT (
architecture Behavioral of LFO is
aclk : IN STD_LOGIC;
aresetn : IN STD_LOGIC;
begin
lfo_period : IN STD_LOGIC_VECTOR(JOYSTICK_LENGHT - 1 DOWNTO 0);
end architecture;
lfo_enable : IN STD_LOGIC;
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;
m_axis_tvalid : OUT STD_LOGIC;
m_axis_tdata : OUT STD_LOGIC_VECTOR(CHANNEL_LENGHT - 1 DOWNTO 0);
m_axis_tlast : OUT STD_LOGIC;
m_axis_tready : IN STD_LOGIC
);
END ENTITY LFO;
ARCHITECTURE Behavioral OF LFO IS
CONSTANT LFO_COUNTER_BASE_PERIOD_NS : INTEGER := 100000;
CONSTANT ADJUSTMENT_FACTOR : INTEGER := 90;
SIGNAL step_counter : INTEGER := 1;
SIGNAL tri_counter : signed(CHANNEL_LENGHT - 1 DOWNTO 0) := (OTHERS => '0');
SIGNAL direction_up : STD_LOGIC := '1';
SIGNAL lfo_tick : STD_LOGIC := '0';
SIGNAL lfo_period_int : INTEGER := LFO_COUNTER_BASE_PERIOD_NS;
SIGNAL m_axis_tvalid_i : STD_LOGIC := '0';
SIGNAL m_axis_tdata_i : STD_LOGIC_VECTOR(CHANNEL_LENGHT - 1 DOWNTO 0) := (OTHERS => '0');
SIGNAL m_axis_tlast_i : STD_LOGIC := '0';
SIGNAL s_axis_tready_i : STD_LOGIC := '1';
SIGNAL temp : STD_LOGIC_VECTOR(CHANNEL_LENGHT + TRIANGULAR_COUNTER_LENGHT - 1 DOWNTO 0) := (OTHERS => '0');
BEGIN
PROCESS (aclk)
BEGIN
IF rising_edge(aclk) THEN
lfo_period_int <= LFO_COUNTER_BASE_PERIOD_NS - ADJUSTMENT_FACTOR * to_integer(unsigned(lfo_period));
END IF;
END PROCESS;
-- Optimized single process for LFO step and triangular waveform generation
PROCESS (aclk)
BEGIN
IF rising_edge(aclk) THEN
IF aresetn = '0' THEN
step_counter <= 0;
tri_counter <= (OTHERS => '0');
direction_up <= '1';
lfo_tick <= '0';
ELSIF lfo_enable = '1' THEN
IF step_counter < lfo_period_int THEN
step_counter <= step_counter + 1;
lfo_tick <= '0';
ELSE
step_counter <= 0;
lfo_tick <= '1';
IF direction_up = '1' THEN
IF tri_counter = 2 ** TRIANGULAR_COUNTER_LENGHT - 1 THEN
direction_up <= '0';
tri_counter <= tri_counter - 1;
ELSE
tri_counter <= tri_counter + 1;
END IF;
ELSE
IF tri_counter = 0 THEN
direction_up <= '1';
tri_counter <= tri_counter + 1;
ELSE
tri_counter <= tri_counter - 1;
END IF;
END IF;
END IF;
ELSE
lfo_tick <= '0';
direction_up <= '1';
tri_counter <= (OTHERS => '0');
step_counter <= 0;
END IF;
END IF;
END PROCESS;
PROCESS (aclk)
BEGIN
IF rising_edge(aclk) THEN
IF aresetn = '0' THEN
temp <= (OTHERS => '0');
ELSIF s_axis_tvalid = '1' AND m_axis_tready = '1' AND lfo_enable = '1' THEN
temp <= STD_LOGIC_VECTOR(
resize(
signed(s_axis_tdata) * signed(resize(tri_counter, s_axis_tdata'length)),
temp'length
)
);
END IF;
END IF;
END PROCESS;
PROCESS (aclk)
BEGIN
IF rising_edge(aclk) THEN
IF aresetn = '0' THEN
m_axis_tvalid_i <= '0';
m_axis_tdata_i <= (OTHERS => '0');
m_axis_tlast_i <= '0';
ELSE
IF s_axis_tvalid = '1' AND m_axis_tready = '1' THEN
IF lfo_enable = '1' THEN
m_axis_tdata_i <= temp(temp'high DOWNTO temp'high - (CHANNEL_LENGHT - 1));
ELSE
m_axis_tdata_i <= s_axis_tdata;
END IF;
s_axis_tready_i <= '0';
m_axis_tvalid_i <= '1';
m_axis_tlast_i <= s_axis_tlast;
END IF;
IF m_axis_tvalid_i = '1' THEN
IF m_axis_tready = '0' THEN
s_axis_tready_i <= '0';
ELSE
s_axis_tready_i <= '1';
END IF;
m_axis_tvalid_i <= '0';
END IF;
END IF;
END IF;
END PROCESS;
s_axis_tready <= s_axis_tready_i;
m_axis_tdata <= m_axis_tdata_i;
m_axis_tvalid <= m_axis_tvalid_i;
m_axis_tlast <= m_axis_tlast_i;
END ARCHITECTURE Behavioral;