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Refactor volume_multiplier

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This commit is contained in:
Davide Cavagnola
2025-05-21 20:37:47 +02:00
parent 4e3d7c45a2
commit 13cf70b984
5 changed files with 181 additions and 81 deletions
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26
LAB3/sim/tb_volume_multiplier.vhd
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@@ -14,6 +14,7 @@ ARCHITECTURE Behavioral OF tb_volume_multiplier IS
CONSTANT VOLUME_WIDTH : POSITIVE := 10;
CONSTANT VOLUME_STEP_2 : POSITIVE := 6;
CONSTANT N_SAMPLES : INTEGER := 8;
CONSTANT N_VOLUMES : INTEGER := 10;
-- Output width calculation (as in DUT)
CONSTANT TDATA_OUT_WIDTH : INTEGER := TDATA_WIDTH - 1 + 2 ** (VOLUME_WIDTH - VOLUME_STEP_2 - 1) + 1;
@@ -63,6 +64,21 @@ ARCHITECTURE Behavioral OF tb_volume_multiplier IS
x"000A00", -- +2560
x"FFF600" -- -2560
);
-- Vettore di memoria per i valori di volume
TYPE volume_mem_type IS ARRAY(0 TO N_VOLUMES-1) OF STD_LOGIC_VECTOR(VOLUME_WIDTH-1 DOWNTO 0);
SIGNAL volume_mem : volume_mem_type := (
std_logic_vector(to_unsigned(0, VOLUME_WIDTH)), -- 0.25x (forte attenuazione)
std_logic_vector(to_unsigned(64, VOLUME_WIDTH)), -- 0.375x (attenuazione media)
std_logic_vector(to_unsigned(479, VOLUME_WIDTH)), -- 0.4375x (leggera attenuazione)
std_logic_vector(to_unsigned(480, VOLUME_WIDTH)), -- 0.5x (volume neutro)
std_logic_vector(to_unsigned(513, VOLUME_WIDTH)), -- Circa 0.5x (volume neutro)
std_logic_vector(to_unsigned(576, VOLUME_WIDTH)), -- 0.5625x (leggero aumento)
std_logic_vector(to_unsigned(640, VOLUME_WIDTH)), -- 0.625x (aumento medio)
std_logic_vector(to_unsigned(768, VOLUME_WIDTH)), -- 0.75x (aumento forte)
std_logic_vector(to_unsigned(896, VOLUME_WIDTH)), -- 0.875x (aumento molto forte)
std_logic_vector(to_unsigned(1023, VOLUME_WIDTH)) -- 1x (massimo volume)
);
BEGIN
@@ -99,7 +115,7 @@ BEGIN
WAIT UNTIL rising_edge(aclk);
-- Set volume to mid (no gain/loss)
volume <= std_logic_vector(to_unsigned(511, VOLUME_WIDTH));
volume <= volume_mem(0);
WAIT UNTIL rising_edge(aclk);
-- Send all samples
@@ -122,7 +138,7 @@ BEGIN
-- Change volume (attenuate)
WAIT FOR 20 ns;
volume <= std_logic_vector(to_unsigned(256, VOLUME_WIDTH)); -- attenuate
volume <= volume_mem(1);
-- Send one more sample
WAIT UNTIL rising_edge(aclk);
@@ -136,6 +152,12 @@ BEGIN
s_axis_tvalid <= '0';
s_axis_tlast <= '0';
FOR i IN 2 TO N_VOLUMES-1 LOOP
WAIT FOR 20 ns;
volume <= volume_mem(i);
WAIT UNTIL rising_edge(aclk);
END LOOP;
-- Wait and finish
WAIT FOR 100 ns;
WAIT;