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Jay

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    So I'm currently writing VHDL code for a 7-segment display that will display (0-F) once each second. I have almost everything done, the only thing I'm stuck on is the controller.

    I need to have 4 buttons, the first starts the counter, the second stops it, the third increments it by one, and the last one resets it back to 0 (I already have the last one done, I just need the first three)

    Here is my overall code (Note that Problem 2 component is my counter):

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

    entity SSD is

    port (

    seg : out std_logic_vector (6 downto 0);

    an3 : out std_logic;

    btn1, btn2, btn3, btn4 : in std_logic;

    clk : in std_logic);

    end SSD;

    architecture Behavioral of SSD is

    component hex7seg is

    port (

    x : in std_logic_vector (3 downto 0);

    a_to_g : out std_logic_vector (6 downto 0));

    end component;

    component Problem2 is

    port (

    clr : in std_logic;

    ce : in std_logic;

    clk : in std_logic;

    b : out std_logic_vector (3 downto 0);

    tc : out std_logic);

    end component;

    component clkdiv is

    port (

    rst : in std_logic;

    clk : in std_logic;

    clkout : out std_logic);

    end component;

    component controller is

    port (

    start : in std_logic;

    stop : in std_logic;

    inc : in std_logic;

    rst : in std_logic;

    clk : in std_logic;

    run : out std_logic);

    end component;

    signal b : std_logic_vector(3 downto 0);

    signal run : std_logic;

    signal clk_1sec : std_logic;

    signal tc : std_logic;

    begin

    U1: hex7seg port map (x => b, a_to_g => seg);

    U2: Problem2 port map (clr=>btn4, ce=>run, clk=>clk_1sec, b=>b, tc=>tc);

    U3: controller port map (start => btn1, stop => btn2, inc => btn3, rst => btn4, clk => clk_1sec, run => run);

    U4: clkdiv port map (rst => btn4, clk => clk, clkout => clk_1sec);

    an3 <= '0';

    end Behavioral;

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

    Here is what I have so far for the controller code:

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

    entity controller is

    Port ( start : in STD_LOGIC;

    stop : in STD_LOGIC;

    inc : in STD_LOGIC;

    rst : in STD_LOGIC;

    clk : in STD_LOGIC;

    run : out STD_LOGIC);

    end controller;

    architecture Behavioral of controller is

    begin

    run <= '1';

    end Behavioral;

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

    I'm not really sure where to go from there to get the other 3 buttons (stopping the counter, starting the counter, and incrementing the counter) working, any help or direction would be greatly appreciated.

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