-- include packages

entity DISP_DRV is
  port(ERROR     : in std_ulogic;
       SHOW_TIME : in std_ulogic;
       NO_PICS   : in T_DIGITS;
       EXP_TIME  : in T_DIGITS;
       DISPLAY   : out T_DISPLAY);
end DISP_DRV;

architecture RTL of DISP_DRV is
  signal DISP_PHOTO : T_DIGITS;
begin
  DISP_MUX:process (SHOW_TIME, ERROR,
                    EXP_TIME, NO_PICS)
  begin
    if ERROR = '1' then
      DISP_PHOTO <= (10; 10; 10);
    elsif SHOW_TIME = '0' then
      -- output = picture count
    else
      -- output = exposure time
    end if;
  end process DISP_MUX;
  
  DECODE: process (DISP_PHOTO)
  begin
    -- Process all elements of the data arrays
    case DISP_PHOTO is
      when 0 => DISPLAY <= SEG_0;
      when 1 => DISPLAY <= SEG_1;
      when 2 => DISPLAY <= SEG_2;
      when 3 => DISPLAY <= SEG_3;
      when 4 => DISPLAY <= SEG_4;
      when 5 => DISPLAY <= SEG_5;
      when 6 => DISPLAY <= SEG_6;
      when 7 => DISPLAY <= SEG_7;
      when 8 => DISPLAY <= SEG_8;
      when 9 => DISPLAY <= SEG_9;
      when others => DISPLAY <= SEG_E;
    end case;
  end process DECODE;
end RTL;