Move vga and image creation entities into a new terminal entity

dvi_test.xise

@@ -17,7 +17,7 @@
   <files>
     <file xil_pn:name="vga.vhd" xil_pn:type="FILE_VHDL">
       <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="1"/>
-      <association xil_pn:name="Implementation" xil_pn:seqID="4"/>
+      <association xil_pn:name="Implementation" xil_pn:seqID="3"/>
     </file>
     <file xil_pn:name="vga_test.vhd" xil_pn:type="FILE_VHDL">
       <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="2"/>
@@ -27,39 +27,43 @@
     </file>
     <file xil_pn:name="i2c_master.vhd" xil_pn:type="FILE_VHDL">
       <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="64"/>
-      <association xil_pn:name="Implementation" xil_pn:seqID="3"/>
+      <association xil_pn:name="Implementation" xil_pn:seqID="2"/>
     </file>
     <file xil_pn:name="main.vhd" xil_pn:type="FILE_VHDL">
       <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="65"/>
-      <association xil_pn:name="Implementation" xil_pn:seqID="9"/>
+      <association xil_pn:name="Implementation" xil_pn:seqID="10"/>
     </file>
     <file xil_pn:name="ipcore_dir/clock_source.xaw" xil_pn:type="FILE_XAW">
       <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="106"/>
-      <association xil_pn:name="Implementation" xil_pn:seqID="6"/>
+      <association xil_pn:name="Implementation" xil_pn:seqID="9"/>
     </file>
     <file xil_pn:name="init_ch7301c.vhd" xil_pn:type="FILE_VHDL">
       <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="112"/>
-      <association xil_pn:name="Implementation" xil_pn:seqID="7"/>
+      <association xil_pn:name="Implementation" xil_pn:seqID="5"/>
     </file>
     <file xil_pn:name="main.ucf" xil_pn:type="FILE_UCF">
       <association xil_pn:name="Implementation" xil_pn:seqID="0"/>
     </file>
     <file xil_pn:name="keyboard.vhd" xil_pn:type="FILE_VHDL">
       <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="153"/>
-      <association xil_pn:name="Implementation" xil_pn:seqID="5"/>
+      <association xil_pn:name="Implementation" xil_pn:seqID="8"/>
     </file>
     <file xil_pn:name="ps2.vhd" xil_pn:type="FILE_VHDL">
       <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="154"/>
-      <association xil_pn:name="Implementation" xil_pn:seqID="2"/>
+      <association xil_pn:name="Implementation" xil_pn:seqID="4"/>
-    </file>
-    <file xil_pn:name="font_rom.vhd" xil_pn:type="FILE_VHDL">
-      <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="155"/>
-      <association xil_pn:name="Implementation" xil_pn:seqID="8"/>
     </file>
     <file xil_pn:name="terminal_buffer.vhd" xil_pn:type="FILE_VHDL">
       <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="156"/>
       <association xil_pn:name="Implementation" xil_pn:seqID="1"/>
     </file>
+    <file xil_pn:name="terminal.vhd" xil_pn:type="FILE_VHDL">
+      <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="156"/>
+      <association xil_pn:name="Implementation" xil_pn:seqID="7"/>
+    </file>
+    <file xil_pn:name="framebuffer.vhd" xil_pn:type="FILE_VHDL">
+      <association xil_pn:name="BehavioralSimulation" xil_pn:seqID="157"/>
+      <association xil_pn:name="Implementation" xil_pn:seqID="6"/>
+    </file>
   </files>
 
   <properties>

framebuffer.vhd

@@ -7,7 +7,7 @@ use ieee.numeric_std.all;
 use std.textio.all;
 use ieee.std_logic_textio.all;
 
-entity font_rom is
+entity framebuffer is
     generic (
         input_clk: integer
     );
@@ -18,9 +18,9 @@ entity font_rom is
 
         rgb: out std_logic_vector(23 downto 0)
     );
-end font_rom;
+end framebuffer;
 
-architecture logic of font_rom is
+architecture logic of framebuffer is
     type rom_type is array(0 to 127) of std_logic_vector(63 downto 0);
 
     impure function read_font(filename: in string) return rom_type is

main.vhd

@@ -1,11 +1,8 @@
 library ieee;
-library unisim;
 
 use ieee.std_logic_1164.all;
 use ieee.std_logic_unsigned.all;
 use ieee.numeric_std.all;
--- Xilinx primitives (obufds)
-use unisim.VComponents.all;
 
 entity main is
     port (
@@ -29,88 +26,53 @@ entity main is
         rotary_down: in std_logic;
         rotary_push: in std_logic;
 
-        led: out std_logic_vector(7 downto 0);
+        led: out std_logic_vector(7 downto 0)
-
-        led0: out std_logic;
-        led1: out std_logic;
-        led2: out std_logic;
-        led4: out std_logic
     );
 end main;
 
-architecture Behavioral of main is
+architecture syn of main is
+    constant clk_vga_f: integer := 48_000_000;
     signal clk_vga: std_logic;
-    signal image_x: std_logic_vector(9 downto 0);
+
-    signal image_y: std_logic_vector(8 downto 0);
+    signal reset: std_logic;
-    signal pixel_rgb: std_logic_vector(23 downto 0);
-    signal dvi_clk: std_logic; -- connect vga_sync to dvi_clk_ds
-    -- tmp
-    signal hsync: std_logic;
-    signal vsync: std_logic;
-    signal de: std_logic;
 begin
+
+    reset <= switch_center;
+
     -- convert the 100MHz to a 48MHz pixel clock
     clock_source: entity work.clock_source port map (
 		CLKIN_IN => clk,
 		CLKFX_OUT => clk_vga
 	);
 
-    dvi_clk_ds: obufds port map (
+    terminal: entity work.terminal generic map (
-        O => dvi_clk_p,
+        clk_f => clk_vga_f
-        OB => dvi_clk_n,
-        I => clk_vga
-    );
-
-    ch7301c: entity work.init_ch7301c generic map (
-        input_clk => 48_000_000
     ) port map (
         clk => clk_vga,
-        reset => switch_center,
+        reset => reset,
-        finished => open,
-        error => open,
-        i2c_scl => i2c_scl,
-        i2c_sda => i2c_sda,
-        dvi_reset => dvi_reset
-    );
 
-    vga_sync: entity work.vga port map (
-        clk => clk_vga,
-        x => image_x,
-        y => image_y,
-        pixel_rgb => pixel_rgb,
         dvi_d => dvi_d,
-        dvi_clk => dvi_clk,
+        dvi_clk_p => dvi_clk_p,
-        dvi_hsync => hsync,
+        dvi_clk_n => dvi_clk_n,
-        dvi_vsync => vsync,
+        dvi_hsync => dvi_hsync,
-        dvi_de => de
+        dvi_vsync => dvi_vsync,
-    );
+        dvi_de => dvi_de,
-
+        dvi_reset => dvi_reset,
-    framebuffer: entity work.font_rom generic map (
+        i2c_scl => i2c_scl,
-        input_clk => 48_000_000
+        i2c_sda => i2c_sda
-    ) port map (
-        clk => clk_vga,
-        x => image_x,
-        y => image_y,
-        rgb => pixel_rgb
     );
 
     keyboard_i: entity work.keyboard generic map (
-        input_clk => 48_000_000
+        input_clk => clk_vga_f
     ) port map (
         clk => clk_vga,
-        reset => switch_center,
+        reset => reset,
         bytes_received => led(5 downto 0),
         ps2_scl => ps2_scl,
         ps2_sda => ps2_sda
     );
 
-    dvi_hsync <= hsync;
+    led(7) <= reset;
-    dvi_vsync <= vsync;
-    dvi_de <= de;
-
-    led(7) <= switch_center;
     led(6) <= '0';
-    --led1 <= dvi_clk;
+
-    --led2 <= hsync;
+end syn;
-    --led4 <= vsync;
-end Behavioral;

terminal.vhd

@@ -0,0 +1,75 @@
+library ieee;
+library unisim;
+
+use ieee.std_logic_1164.all;
+use ieee.std_logic_unsigned.all;
+use ieee.numeric_std.all;
+-- Xilinx primitives (obufds)
+use unisim.VComponents.all;
+
+entity terminal is
+    generic (
+        clk_f: integer
+    );
+    port (
+        clk: in std_logic;
+        reset: in std_logic;
+
+        dvi_d: out std_logic_vector(11 downto 0);
+        dvi_clk_p: out std_logic;
+        dvi_clk_n: out std_logic;
+        dvi_hsync: out std_logic;
+        dvi_vsync: out std_logic;
+        dvi_de: out std_logic;
+        dvi_reset: out std_logic;
+        i2c_scl: inout std_logic;
+        i2c_sda: inout std_logic
+    );
+end terminal;
+
+architecture syn of terminal is
+    signal image_x: std_logic_vector(9 downto 0);
+    signal image_y: std_logic_vector(8 downto 0);
+    signal pixel_rgb: std_logic_vector(23 downto 0);
+begin
+
+    dvi_clk_ds: obufds port map (
+        I => clk,
+        O => dvi_clk_p,
+        OB => dvi_clk_n
+    );
+
+    init_ch7301c: entity work.init_ch7301c generic map (
+        input_clk => clk_f
+    ) port map (
+        clk => clk,
+        reset => reset,
+        finished => open,
+        error => open,
+        i2c_scl => i2c_scl,
+        i2c_sda => i2c_sda,
+        dvi_reset => dvi_reset
+    );
+
+    vga: entity work.vga port map (
+        clk => clk,
+        x => image_x,
+        y => image_y,
+        pixel_rgb => pixel_rgb,
+        dvi_d => dvi_d,
+        dvi_hsync => dvi_hsync,
+        dvi_vsync => dvi_vsync,
+        dvi_de => dvi_de
+    );
+
+    framebuffer: entity work.framebuffer generic map (
+        input_clk => clk_f
+    ) port map (
+        clk => clk,
+        x => image_x,
+        y => image_y,
+        rgb => pixel_rgb
+    );
+
+end syn;
+

vga.vhd

@@ -12,7 +12,6 @@ entity vga is
         pixel_rgb: in std_logic_vector(23 downto 0);
 
         dvi_d: out std_logic_vector(11 downto 0);
-        dvi_clk: out std_logic;
         dvi_hsync: out std_logic;
         dvi_vsync: out std_logic;
         dvi_de: out std_logic
@@ -25,8 +24,6 @@ architecture behavioral of vga is
     signal vcount: std_logic_vector(8 downto 0) := (others => '0');
     signal data_enabled: std_logic;
 begin
-    dvi_clk <= clk;
-    --dvi_clk <= second_batch;
     dvi_de <= data_enabled;
 
     data_enabled <= '1' when hcount < 640 and vcount < 480 else