martijn's code toegevoegd voor prog2w1 sound

1 files changed, 65 insertions, 0 deletions

diff --git a/src/SampleOut.vhd b/src/SampleOut.vhd
new file mode 100644
index 0000000..bd2d2dc
--- /dev/null
+++ b/src/SampleOut.vhd
@@ -0,0 +1,65 @@
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+use IEEE.NUMERIC_STD.ALL;
+use IEEE.NUMERIC_STD.ALL;
+
+entity SampleOut is
+    generic(
+        INPUT_DEPTH: integer := 256;
+        INPUT_SAMPLE_SIZE: integer := 36984;
+        INPUT_AUDIO_HZ: integer := 44100;
+        INPUT_CLK_HZ: integer := 100000000
+    );
+    Port ( 	reset, clk : in STD_LOGIC;
+			inCOEData : in STD_LOGIC_VECTOR(7 downto 0);
+			outCOEData : out STD_LOGIC_VECTOR(7 downto 0);
+			outCOEAddress : out STD_LOGIC_VECTOR(15 downto 0)
+			);
+end SampleOut;
+
+architecture Behavioral of SampleOut is
+    signal count: integer;
+    signal COEAddress: integer;    
+
+begin
+    outCOEData <= inCOEData;
+    
+    process (reset, clk) 
+    --variable currentThreasHold: integer;
+    begin        
+        -- if reset
+        if (reset = '1') then
+            -- default values for outputs, so output state is always defined
+            outCOEAddress <= (others => '0');
+            count <= 0;
+            COEAddress <= 0;
+        -- 
+        elsif rising_edge(clk) then
+            -- default values for outputs, so output state is always defined
+            outCOEAddress <= (others => '0');
+            count <= 0;
+            COEAddress <= 0;
+            
+            -- start code
+            outCOEAddress <= std_logic_vector (to_unsigned(COEAddress, outCOEAddress'length));
+            count <= count + 1;     
+            COEAddress <= COEAddress;
+            
+            -- if counter is >= the max amount of pulses per audio sample
+            if (count >= INPUT_CLK_HZ/INPUT_AUDIO_HZ) then -- Next audio sample
+                count <= 0;
+                COEAddress <= COEAddress + 1; --todo: check timing delay
+                -- add + 1 becouse COEAddress is signal updated ad end of process
+                outCOEAddress <= std_logic_vector (to_unsigned(COEAddress + 1, outCOEAddress'length));
+                
+                -- check for max level: add + 1 becouse COEAddress is signal updated ad end of process
+                if (COEAddress + 1 >= INPUT_SAMPLE_SIZE) then
+                    -- First audio sample
+                    outCOEAddress <= (others => '0');
+                    COEAddress <= 0;
+                end if;
+            end if;
+        end if;
+    end process;
+
+end Behavioral;