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Lab 3: Audio Processing System #3

Merged
PickleRick merged 43 commits from LAB3 into main 2025-06-07 22:18:48 +02:00
Conversation 1 Commits 43 Files Changed 45 +31 -43
5 changed files with 31 additions and 43 deletions
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22
LAB3/src/balance_controller.vhd
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@@ -30,8 +30,7 @@ ARCHITECTURE Behavioral OF balance_controller IS
CONSTANT BALANCE_STEPS : INTEGER := (2 ** (BALANCE_WIDTH - 1)) / (2 ** BALANCE_STEP_2) + 1; CONSTANT BALANCE_STEPS : INTEGER := (2 ** (BALANCE_WIDTH - 1)) / (2 ** BALANCE_STEP_2) + 1;
CONSTANT BAL_MID : INTEGER := 2 ** (BALANCE_WIDTH - 1); -- 512 for 10 bit CONSTANT BAL_MID : INTEGER := 2 ** (BALANCE_WIDTH - 1); -- 512 for 10 bit
CONSTANT BLOCK_SIZE : INTEGER := 2 ** BALANCE_STEP_2; CONSTANT DEAD_ZONE : INTEGER := (2 ** BALANCE_STEP_2) / 2;
CONSTANT DEAD_ZONE : INTEGER := BLOCK_SIZE / 2;
SIGNAL left_channel : INTEGER RANGE 0 TO BALANCE_STEPS := 0; SIGNAL left_channel : INTEGER RANGE 0 TO BALANCE_STEPS := 0;
SIGNAL right_channel : INTEGER RANGE 0 TO BALANCE_STEPS := 0; SIGNAL right_channel : INTEGER RANGE 0 TO BALANCE_STEPS := 0;
@@ -41,10 +40,12 @@ ARCHITECTURE Behavioral OF balance_controller IS
BEGIN BEGIN
-- Assigning the output signals -- Assigning the output signals
m_axis_tvalid <= m_axis_tvalid_int; m_axis_tvalid <= m_axis_tvalid_int;
s_axis_tready <= m_axis_tready AND aresetn; s_axis_tready <= (m_axis_tready OR NOT m_axis_tvalid_int) AND aresetn; -- Chiedere e in caso togliere 'AND aresetn'
-- Balance to exp
PROCESS (aclk)
-- Balance to exp process to avoid changing the balance value when multiplying it for the sample data
BALANCE_CALC : PROCESS (aclk)
BEGIN BEGIN
IF rising_edge(aclk) THEN IF rising_edge(aclk) THEN
@@ -56,13 +57,13 @@ BEGIN
ELSE ELSE
-- Balance left and right channels -- Balance left and right channels
IF unsigned(balance) > (BAL_MID + DEAD_ZONE) THEN IF unsigned(balance) > (BAL_MID + DEAD_ZONE) THEN
left_channel <= to_integer((unsigned(balance) - (BAL_MID + DEAD_ZONE)) SRL BALANCE_STEP_2) + 1; left_channel <= to_integer((unsigned(balance) - to_unsigned(BAL_MID + DEAD_ZONE, balance'length)) SRL BALANCE_STEP_2) + 1; -- +1 due to shift approximation defect
ELSE ELSE
left_channel <= 0; left_channel <= 0;
END IF; END IF;
IF unsigned(balance) < (BAL_MID - DEAD_ZONE) THEN IF unsigned(balance) < (BAL_MID - DEAD_ZONE) THEN
right_channel <= to_integer(((BAL_MID - DEAD_ZONE) - unsigned(balance)) SRL BALANCE_STEP_2) + 1; right_channel <= to_integer((to_unsigned(BAL_MID - DEAD_ZONE, balance'length) - unsigned(balance)) SRL BALANCE_STEP_2) + 1;
ELSE ELSE
right_channel <= 0; right_channel <= 0;
END IF; END IF;
@@ -71,10 +72,10 @@ BEGIN
END IF; END IF;
END PROCESS; END PROCESS BALANCE_CALC;
-- Handle AXIS stream -- Handle AXIS stream
PROCESS (aclk) AXIS : PROCESS (aclk)
BEGIN BEGIN
IF rising_edge(aclk) THEN IF rising_edge(aclk) THEN
@@ -82,7 +83,6 @@ BEGIN
IF aresetn = '0' THEN IF aresetn = '0' THEN
m_axis_tvalid_int <= '0'; m_axis_tvalid_int <= '0';
m_axis_tlast <= '0'; m_axis_tlast <= '0';
m_axis_tdata <= (OTHERS => '0');
ELSE ELSE
-- Default output signals -- Default output signals
@@ -113,6 +113,6 @@ BEGIN
END IF; END IF;
END PROCESS; END PROCESS AXIS;
END Behavioral; END Behavioral;

32
LAB3/src/volume_multiplier.vhd
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@@ -29,6 +29,8 @@ END volume_multiplier;
ARCHITECTURE Behavioral OF volume_multiplier IS ARCHITECTURE Behavioral OF volume_multiplier IS
CONSTANT VOLUME_STEPS : INTEGER := (2 ** (VOLUME_WIDTH - 1)) / (2 ** VOLUME_STEP_2) + 1; CONSTANT VOLUME_STEPS : INTEGER := (2 ** (VOLUME_WIDTH - 1)) / (2 ** VOLUME_STEP_2) + 1;
CONSTANT VOL_MID : INTEGER := 2 ** (VOLUME_WIDTH - 1); -- 512 for 10 bit
CONSTANT DEAD_ZONE : INTEGER := (2 ** VOLUME_STEP_2) / 2;
SIGNAL volume_exp_mult : INTEGER RANGE -VOLUME_STEPS TO VOLUME_STEPS := 0; SIGNAL volume_exp_mult : INTEGER RANGE -VOLUME_STEPS TO VOLUME_STEPS := 0;
@@ -37,9 +39,9 @@ ARCHITECTURE Behavioral OF volume_multiplier IS
BEGIN BEGIN
-- Assigning the output signals -- Assigning the output signals
m_axis_tvalid <= m_axis_tvalid_int; m_axis_tvalid <= m_axis_tvalid_int;
s_axis_tready <= m_axis_tready AND aresetn; s_axis_tready <= (m_axis_tready OR NOT m_axis_tvalid_int) AND aresetn;
-- Volume to exp -- Volume to exp process to avoid changing the volume value when multiplying it for the sample data
PROCESS (aclk) PROCESS (aclk)
BEGIN BEGIN
@@ -51,7 +53,10 @@ BEGIN
ELSE ELSE
-- Volume to signed and centered and convert to power of 2 exponent -- Volume to signed and centered and convert to power of 2 exponent
volume_exp_mult <= to_integer( volume_exp_mult <= to_integer(
shift_right(signed('0' & volume) - to_signed(480, volume'length + 1), VOLUME_STEP_2) shift_right(
signed('0' & volume) - to_signed(VOL_MID - DEAD_ZONE, volume'length + 1),
VOLUME_STEP_2
)
); );
END IF; END IF;
@@ -69,7 +74,6 @@ BEGIN
IF aresetn = '0' THEN IF aresetn = '0' THEN
m_axis_tvalid_int <= '0'; m_axis_tvalid_int <= '0';
m_axis_tlast <= '0'; m_axis_tlast <= '0';
m_axis_tdata <= (OTHERS => '0');
ELSE ELSE
-- Default output signals -- Default output signals
@@ -86,26 +90,10 @@ BEGIN
-- Joystick datasheet: (y-axis) a value of 0 when it is tilted all the way down -- Joystick datasheet: (y-axis) a value of 0 when it is tilted all the way down
-- and a value of 1023 when it is tilted all the way up -- and a value of 1023 when it is tilted all the way up
IF volume_exp_mult >= 0 THEN IF volume_exp_mult >= 0 THEN
m_axis_tdata <= STD_LOGIC_VECTOR( m_axis_tdata <= STD_LOGIC_VECTOR(resize(shift_left(signed(s_axis_tdata), volume_exp_mult), m_axis_tdata'LENGTH));
shift_left(
resize(
signed(s_axis_tdata),
m_axis_tdata'LENGTH
),
volume_exp_mult
)
);
ELSE ELSE
m_axis_tdata <= STD_LOGIC_VECTOR( m_axis_tdata <= STD_LOGIC_VECTOR(resize(shift_right(signed(s_axis_tdata), - volume_exp_mult), m_axis_tdata'LENGTH));
shift_right(
resize(
signed(s_axis_tdata),
m_axis_tdata'LENGTH
),
- volume_exp_mult
)
);
END IF; END IF;

2
LAB3/vivado/balance_controller/balance_controller.xpr
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@@ -47,7 +47,7 @@
<Option Name="IPStaticSourceDir" Val="$PIPUSERFILESDIR/ipstatic"/> <Option Name="IPStaticSourceDir" Val="$PIPUSERFILESDIR/ipstatic"/>
<Option Name="EnableBDX" Val="FALSE"/> <Option Name="EnableBDX" Val="FALSE"/>
<Option Name="DSABoardId" Val="basys3"/> <Option Name="DSABoardId" Val="basys3"/>
<Option Name="WTXSimLaunchSim" Val="14"/> <Option Name="WTXSimLaunchSim" Val="16"/>
<Option Name="WTModelSimLaunchSim" Val="0"/> <Option Name="WTModelSimLaunchSim" Val="0"/>
<Option Name="WTQuestaLaunchSim" Val="0"/> <Option Name="WTQuestaLaunchSim" Val="0"/>
<Option Name="WTIesLaunchSim" Val="0"/> <Option Name="WTIesLaunchSim" Val="0"/>

16
LAB3/vivado/balance_controller/tb_balance_controller_behav.wcfg
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@@ -11,8 +11,8 @@
</db_ref_list> </db_ref_list>
<zoom_setting> <zoom_setting>
<ZoomStartTime time="0fs"></ZoomStartTime> <ZoomStartTime time="0fs"></ZoomStartTime>
<ZoomEndTime time="116601fs"></ZoomEndTime> <ZoomEndTime time="258201fs"></ZoomEndTime>
<Cursor1Time time="100200fs"></Cursor1Time> <Cursor1Time time="0fs"></Cursor1Time>
</zoom_setting> </zoom_setting>
<column_width_setting> <column_width_setting>
<NameColumnWidth column_width="147"></NameColumnWidth> <NameColumnWidth column_width="147"></NameColumnWidth>
@@ -36,13 +36,13 @@
<obj_property name="ObjectShortName">balance[9:0]</obj_property> <obj_property name="ObjectShortName">balance[9:0]</obj_property>
<obj_property name="Radix">UNSIGNEDDECRADIX</obj_property> <obj_property name="Radix">UNSIGNEDDECRADIX</obj_property>
</wvobject> </wvobject>
<wvobject fp_name="/tb_balance_controller/uut/left_shift" type="other"> <wvobject fp_name="/tb_balance_controller/uut/left_channel" type="other">
<obj_property name="ElementShortName">left_shift</obj_property> <obj_property name="ElementShortName">left_channel</obj_property>
<obj_property name="ObjectShortName">left_shift</obj_property> <obj_property name="ObjectShortName">left_channel</obj_property>
</wvobject> </wvobject>
<wvobject fp_name="/tb_balance_controller/uut/right_shift" type="other"> <wvobject fp_name="/tb_balance_controller/uut/right_channel" type="other">
<obj_property name="ElementShortName">right_shift</obj_property> <obj_property name="ElementShortName">right_channel</obj_property>
<obj_property name="ObjectShortName">right_shift</obj_property> <obj_property name="ObjectShortName">right_channel</obj_property>
</wvobject> </wvobject>
<wvobject type="divider" fp_name="divider20"> <wvobject type="divider" fp_name="divider20">
<obj_property name="label">s_axis</obj_property> <obj_property name="label">s_axis</obj_property>

2
LAB3/vivado/volume_multiplier/volume_multiplier.xpr
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@@ -47,7 +47,7 @@
<Option Name="IPStaticSourceDir" Val="$PIPUSERFILESDIR/ipstatic"/> <Option Name="IPStaticSourceDir" Val="$PIPUSERFILESDIR/ipstatic"/>
<Option Name="EnableBDX" Val="FALSE"/> <Option Name="EnableBDX" Val="FALSE"/>
<Option Name="DSABoardId" Val="basys3"/> <Option Name="DSABoardId" Val="basys3"/>
<Option Name="WTXSimLaunchSim" Val="49"/> <Option Name="WTXSimLaunchSim" Val="57"/>
<Option Name="WTModelSimLaunchSim" Val="0"/> <Option Name="WTModelSimLaunchSim" Val="0"/>
<Option Name="WTQuestaLaunchSim" Val="0"/> <Option Name="WTQuestaLaunchSim" Val="0"/>
<Option Name="WTIesLaunchSim" Val="0"/> <Option Name="WTIesLaunchSim" Val="0"/>