1 files changed, 0 insertions, 117 deletions
diff --git a/fpga/hp_lcd_driver/tmds_encoder_a.vhdl b/fpga/hp_lcd_driver/tmds_encoder_a.vhdl
deleted file mode 100644
index 40f8dd4..0000000
--- a/fpga/hp_lcd_driver/tmds_encoder_a.vhdl
+++ /dev/null
@@ -1,117 +0,0 @@
-library ieee;
-use ieee.std_logic_1164.all;
-use ieee.numeric_std.all;
-
-entity tmds_encoder is
-    port (
-        clk       : in  std_logic;
-        sys_rst_n : in  std_logic;
-        blank     : in  std_logic;
-        ctrl      : in  std_logic_vector(1 downto 0);
-        din       : in  std_logic_vector(7 downto 0);
-        dout      : out std_logic_vector(9 downto 0)
-        );
-end tmds_encoder;
-
-architecture beh of tmds_encoder is
-    signal n_ones_din : integer range 0 to 8;
-
-    signal xored, xnored : std_logic_vector(8 downto 0);
-    signal q_m           : std_logic_vector(8 downto 0);
-
-    -- a positive value represents the excess number of 1's that have been transmitted
-    -- a negative value represents the excess number of 0's that have been transmitted
-    signal disparity : signed(3 downto 0) := to_signed(0, 4);
-    -- difference between 1's and 0's (/2 since the last bit is never used)
-    signal diff      : signed(3 downto 0) := to_signed(0, 4);
-
-begin
-
-    -- ones counter for input data
-    process(din) is
-        variable c : integer range 0 to 8;
-    begin
-        c := 0;
-        for i in 0 to 7 loop
-            if din(i) = '1' then
-                c := c + 1;
-            end if;
-        end loop;
-        n_ones_din <= c;
-    end process;
-
-    -- create xor encodings
-    xored(0) <= din(0);
-    encode_xor : for i in 1 to 7 generate
-    begin
-        xored(i) <= din(i) xor xored(i - 1);
-    end generate;
-    xored(8) <= '1';
-
-    -- create xnor encodings
-    xnored(0) <= din(0);
-    encode_xnor : for i in 1 to 7 generate
-    begin
-        xnored(i) <= din(i) xnor xnored(i - 1);
-    end generate;
-    xnored(8) <= '0';
-
-    -- use xnored or xored data based on the ones
-    q_m <= xnored when n_ones_din > 4 or (n_ones_din = 4 and din(0) = '0') else xored;
-
-    -- ones counter for internal data
-    process(q_m) is
-        variable c : integer range 0 to 8;
-    begin
-        c := 0;
-        for i in 0 to 7 loop
-            if q_m(i) = '1' then
-                c := c + 1;
-            end if;
-        end loop;
-        diff <= to_signed(c-4, 4);
-    end process;
-
-    process(clk) is
-    begin
-        if rising_edge(clk) then
-            if blank = '1' then
-                case ctrl is
-                    when "00"   => dout <= "1101010100";
-                    when "01"   => dout <= "0010101011";
-                    when "10"   => dout <= "0101010100";
-                    when others => dout <= "1010101011";
-                end case;
-                disparity <= (others => '0');
-            else
-                if disparity = 0 or diff = 0 then
-                    -- xnored data
-                    if q_m(8) = '0' then
-                        dout      <= "10" & not q_m(7 downto 0);
-                        disparity <= disparity - diff;
-                    -- xored data
-                    else
-                        dout      <= "01" & q_m(7 downto 0);
-                        disparity <= disparity + diff;
-                    end if;
-                elsif (diff(diff'left) = '0' and disparity(disparity'left) = '0') or
-                    (diff(diff'left) = '1' and disparity(disparity'left) = '1') then
-                    dout <= '1' & q_m(8) & not q_m(7 downto 0);
-                    if q_m(8) = '1' then
-                        disparity <= disparity + 1 - diff;
-                    else
-                        disparity <= disparity - diff;
-                    end if;
-                else
-                    dout <= '0' & q_m;
-                    if q_m(8) = '1' then
-                        disparity <= disparity + diff;
-                    else
-                        disparity <= disparity - 1 + diff;
-                    end if;
-                end if;
-            end if;
-        end if;
-    end process;
-end beh;
-