adding ecen 320 final project

ecen320/tx_encoder/tx_top.vhd

@@ -0,0 +1,104 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity tx_top is
+	generic(COUNTER_BIT: natural := 20);
+	port(
+		clk: in std_logic;
+		sw: in std_logic_vector(7 downto 0);
+		seg : out std_logic_vector(6 downto 0);
+		an : out std_logic_vector(3 downto 0) := "1100";		
+		dp : out std_logic;
+		tx_out: out std_logic;
+		btn: in std_logic_vector(3 downto 0);
+		data_out : out std_logic_vector(15 downto 0)
+	);
+end tx_top;
+
+architecture top_arch of tx_top is
+			
+--	component seven_segment_display
+--		generic(
+--			COUNTER_BITS: natural := 15
+--		);	
+--		port(
+--			clk: in std_logic;
+--			data_in: in std_logic_vector(15 downto 0);
+--			dp_in: in std_logic_Vector(3 downto 0);
+--			blank: in std_logic_vector(3 downto 0);
+--			seg : out std_logic_vector(6 downto 0);
+--			dp : out std_logic;
+--			an : out std_logic_vector(3 downto 0)
+--		);
+--	end component;
+	
+	component tx
+		port(
+			clk: in std_logic;
+			rst: in std_logic;
+			data_in: in std_logic_vector(7 downto 0);
+			send_character: in std_logic;
+			tx_out: out std_logic;
+			tx_busy: out std_logic
+			
+		);
+	end component;
+	
+	signal reset: std_logic := '0';
+	signal dp_in: std_logic_vector(3 downto 0) := "0000";
+	signal blank4: std_logic_vector(3 downto 0) := (others=>'0');	
+	signal data_in: std_logic_vector(7 downto 0) := (others=>'0');
+	signal send_character: std_logic;
+	signal counter: unsigned(COUNTER_BIT downto 0) := (others=>'0');
+	signal debouncing: std_logic;
+	signal data_in2: std_logic_vector(15 downto 0) := (others=>'0');
+	
+	begin
+		
+--		bottom_segment: seven_segment_display
+--		generic map(COUNTER_BITS=>15)
+--		port map(clk=>clk, an=>an, seg=>seg, dp=>dp, blank=>blank4,
+--					data_in=>data_in2, dp_in=>dp_in
+--				);
+		
+		bottom_tx: tx
+		port map(clk=>clk, rst=>reset, send_character=>send_character, 
+					tx_out=>tx_out, tx_busy=>open, data_in=>data_in
+				);
+		
+		data_out <= "00000000" & sw;
+		data_in <=  sw;	
+		data_in2 <= "00000000" & sw;
+		-- debouncer
+		process(clk)
+		begin
+			if(rising_edge(clk)) then
+				if(counter = "111111111111111111111") then
+					debouncing <= '1';
+					counter <= (others=>'0');
+				else
+					debouncing <= '0';				
+					counter <= counter+1;
+				end if;
+			end if;
+		end process;
+		
+		-- button logic
+		process(clk,btn)
+		begin
+			if(rising_edge(clk)) then
+				if (btn(3)='1') then
+					reset <= '1';
+				elsif (btn(0)='1') then
+					if(debouncing='1') then
+						send_character <= '1';
+					end if;
+				else
+					reset <= '0';
+					send_character <= '0';
+				end if;
+			end if;
+		end process;
+				
+end top_arch;