adding ecen 320 final project

ecen320/rx_decoder/charGen.vhd

@@ -0,0 +1,76 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity charGen is
+	port(
+		clk: in std_logic;
+		char_we: in std_logic;
+		char_value: in std_logic_vector(7 downto 0);
+		char_addr: in std_logic_vector(11 downto 0);
+		pixel_x, pixel_y: in std_logic_vector(9 downto 0);
+		pixel_out: out std_logic
+	);
+end charGen;
+
+architecture charGen_arch of charGen is
+	
+	component char_mem
+   port(
+			clk: in std_logic;
+			char_read_addr : in std_logic_vector(11 downto 0);
+			char_write_addr: in std_logic_vector(11 downto 0);
+			char_we : in std_logic;
+			char_write_value : in std_logic_vector(7 downto 0);
+			char_read_value : out std_logic_vector(7 downto 0)
+		);
+	end component;
+	
+	component font_rom
+   port(
+			clk: in std_logic;
+			addr: in std_logic_vector(10 downto 0);
+			data: out std_logic_vector(7 downto 0)
+		);
+	end component;
+	
+	signal rom_addr: std_logic_vector(10 downto 0);
+	signal ram_read_addr: std_logic_vector(11 downto 0);
+	signal ram_value: std_logic_vector(7 downto 0);
+	signal myselect: std_logic_vector(2 downto 0);
+	signal temp1: std_logic_vector(2 downto 0);
+	signal rom_dataout: std_logic_vector(7 downto 0);
+	
+	begin
+		myram: char_mem
+		port map(clk=>clk, char_read_addr=>ram_read_addr, char_write_addr=>char_addr, char_we=>char_we, char_write_value=>char_value, char_read_value=>ram_value
+				);
+		myrom: font_rom
+		port map(clk=>clk, addr=>rom_addr, data=>rom_dataout
+				);
+
+		process(clk)
+		begin
+			if(rising_edge(clk)) then
+				temp1 <= pixel_x(2 downto 0);
+				myselect <= temp1;
+			end if;
+		end process;
+
+		
+		with myselect select
+			pixel_out <= rom_dataout(7) when "000",
+							 rom_dataout(6) when "001",
+							 rom_dataout(5) when "010",
+							 rom_dataout(4) when "011",
+							 rom_dataout(3) when "100",
+							 rom_dataout(2) when "101",
+							 rom_dataout(1) when "110",
+							 rom_dataout(0) when others;
+							 
+		
+		ram_read_addr <= pixel_y(8 downto 4) & pixel_x(9 downto 3);
+		
+		rom_addr <= ram_value(6 downto 0) & pixel_y(3 downto 0);
+		
+end charGen_arch;