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    曙海教育集團論壇FPGA專區FPGA初中級 → FPGA 時鐘問題


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    主題:FPGA 時鐘問題

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    FPGA 時鐘問題  發帖心情 Post By:2010-12-19 14:00:46

    剛學不久~

    我要做24H製的時鐘~但我一直DEBUG~一直用不出來~

    Xilinx ISE 8.2i軟體~

    請會的人幫我看一下哪出錯了~謝



    library IEEE;

    use IEEE.STD_LOGIC_1164.ALL;

    use IEEE.STD_LOGIC_ARITH.ALL;

    use IEEE.STD_LOGIC_UNSIGNED.ALL;


    ---- Uncomment the following library declaration if instantiating

    ---- any Xilinx primitives in this code.

    --library UNISIM;

    --use UNISIM.VComponents.all;


    entity CLOCK_00_60 is

        Port ( CLK : in  STD_LOGIC;

               RESET : in  STD_LOGIC;

               ENABLE : out  STD_LOGIC_VECTOR (6 downto 0);

               SEGMENT : out  STD_LOGIC_VECTOR (6 downto 0));

    end CLOCK_00_60;


    architecture Behavioral of CLOCK_00_60 is

    signal SCAN_CLK :STD_LOGIC;

    signal COUNT_CLK :STD_LOGIC;

    signal DECODE_BCD :STD_LOGIC_VECTOR (3 downto 0);

    signal mineable :STD_LOGIC;

    signal hreable :STD_LOGIC;

    signal POSITION:STD_LOGIC_VECTOR (6 downto 0);

    signal DIVIDER:STD_LOGIC_VECTOR (29 downto 1);

    signal COUNT_BCD:STD_LOGIC_VECTOR (23 downto 0);


    begin

    -------------------------------------------------

    process (CLK,RESET)

    begin

    if RESET = '0' then

     DIVIDER <= ( others => '0');

    elsif CLK' event and CLK = '1' then

     DIVIDER <= DIVIDER + 1 ;

    end if;

    end process;

    COUNT_CLK<=DIVIDER(24);

    SCAN_CLK<=DIVIDER(15);

    ------------------------------------------------秒

    process(RESET,SCAN_CLK)

    begin

    if RESET = '0' then

     COUNT_BCD <= ( others => '0');

    elsif SCAN_CLK' event and SCAN_CLK = '1' then

     if   COUNT_BCD(3 downto 0)= x"9" then

        COUNT_BCD(3 downto 0)<= x"0";

        COUNT_BCD(7 downto 4)<= COUNT_BCD(7 downto 4)+1;

     else

       COUNT_BCD(3 downto 0)<= COUNT_BCD(3 downto 0)+1;

     end if;

    end if;

    end process;

    mineable <= '1' when COUNT_BCD(7 downto 0) = x"59" else '0';

    ----------------------------------------------------------分


    process(RESET,SCAN_CLK)

    begin

    if RESET = '0' then

     COUNT_BCD <= ( others => '0');

     if mineable = '1' then

    elsif SCAN_CLK' event and SCAN_CLK = '1' then

     if   COUNT_BCD(11 downto 8)= x"9" then

        COUNT_BCD(11 downto 8)<= x"0";

        COUNT_BCD(15 downto 12)<= COUNT_BCD(15 downto 12)+1;

     else

       COUNT_BCD(11 downto 8)<= COUNT_BCD(11 downto 8)+1;

     end if;

    end if;

    end if;

    end process;

    hreable <= '1' when COUNT_BCD(15 downto 8) = x"59" else '0';

    -------------------------------------------------------------時

    process(RESET,SCAN_CLK)

    begin

    if RESET = '0' then

     COUNT_BCD <= ( others => '0');

      if mineable = '1' and hreable = '1' then

    elsif SCAN_CLK' event and SCAN_CLK = '1' then

     if   COUNT_BCD(19 downto 16)= x"9" then

        COUNT_BCD(19 downto 16)<= x"0";

        COUNT_BCD(23 downto 20)<= COUNT_BCD(23 downto 20)+1;

      if   COUNT_BCD(19 downto 16)= x"2" then

       COUNT_BCD(23 downto 20)<= x"0";

     else

       COUNT_BCD(19 downto 16)<= COUNT_BCD(19 downto 16)+1;

      end if;

     end if;

      end if;

    end if;

    end process;



    process(RESET,SCAN_CLK)

    begin

    if RESET = '0' then

     POSITION <= "1111110";

    elsif SCAN_CLK' event and SCAN_CLK = '1' then

     POSITION<="111111"&POSITION(0);

    end if;

    end process;

    ENABLE<=POSITION;

    -----------------------------------------------------------

    process(POSITION,SCAN_CLK)

    begin

    case POSITION is

     when "1111110" => DECODE_BCD <=COUNT_BCD(3 downto 0);    --秒

     when "1111101" => DECODE_BCD <=COUNT_BCD(7 downto 4);    --秒

     when "1111011" => DECODE_BCD <=COUNT_BCD(11 downto 8);   --分

     when "1110111" => DECODE_BCD <=COUNT_BCD(15 downto 12);   --分

       when "1101111" => DECODE_BCD <=COUNT_BCD(19 downto 16);   --時

       when "1011111" => DECODE_BCD <=COUNT_BCD(23 downto 20);   --時

     when others => null;

    end case;

    end process;

     

    with DECODE_BCD Select

    SEGMENT<= "1000000" when X"0",

      "1111001" when X"1",

      "0100100" when X"2",

      "0110000" when X"3",

      "0011001" when X"4",

      "0010010" when X"5",

      "0000010" when X"6",

      "1111000" when X"7",

      "0000000" when X"8",

      "0010000" when X"9",

      "1111111" when others;


    end Behavioral;

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