CODE FOR SCROLLING DISPLAY!!!

by barkkathulla 2012-09-21 09:48:19

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;

ENTITY fourbitcounter IS /* creating an entity for four bit counter */
PORT (
Clock : IN STD_LOGIC;
Enable : IN STD_LOGIC;
Clear_n : IN STD_LOGIC;
Initial_Value : IN STD_LOGIC_VECTOR(3 downto 0);
Load_n : IN STD_LOGIC;
Counter_Output : OUT STD_LOGIC_VECTOR(3 downto 0));
END fourbitcounter;

ENTITY display_driver IS /* creating an entity for seven segment and reset equations */
PORT ( QD, QC, QB, QA : IN STD_LOGIC;
SegA, SegB, SegC, SegD, SegE, SegF, SegG: OUT STD_LOGIC;
Reset_n: OUT STD_LOGIC);
END display_driver;

ENTITY my_counter_display IS
PORT ( Clock : IN STD_LOGIC;
SegA, SegB, SegC, SegD, SegE, SegF, SegG: OUT STD_LOGIC);
END my_counter_display;
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