please help in Quad 7-segment....

[sara2004]

hello
i am begginer in the field, i want to ask about code for Quad 7-segment, and how to display the numbers, i am using vhdl, and "EB008 Quad 7-segment" hardware i connect it to the CPLD board, how to define the J2 (4 signals) in the code please help me
my regards

[Benj]

Hello Sara

Here is an exaple that drives two of the 7 segment displays. It does not use VHDL but instead uses the circuit part of Quartus. You should however be able to see how it works and convert to VHDL. There might even be a tool in Quartus to auto convert to VHDL.

[sara2004]

Hello
thanks Benj, I found the tool that converts from schematic design to vhdl, file > create/update > create HDL design file for current file, but errors has occurred, and the part of 7 segment has errors too, the following code shows my simple program to display on "EB008 Quad 7-segment", entering the binary number using switches and displaying this number on 7 segment, the part of annodes is not correct, so how to solve it.
my regards

LIBRARY ieee;
USE ieee.std_logic_1164.all;
Library work;
-- Title "7 segment display driver circuit";
-- File: seg7.vhd

ENTITY seg7 IS
PORT (d : IN STD_LOGIC_VECTOR (3 DOWNTO 0);
s : OUT STD_LOGIC_VECTOR (7 DOWNTO 0);-- 7 segment outputs
annodes : OUT STD_LOGIC_VECTOR(3 DOWNTO 0)); --4 signals of J2

END seg7;

ARCHITECTURE display OF seg7 IS
BEGIN
s <= "11000000" WHEN d = "0000" ELSE -- H"40"
"11111001" WHEN d = "0001" ELSE -- H"79"
"10100100" WHEN d = "0010" ELSE -- H"24"
"10110000" WHEN d = "0011" ELSE -- H"30"
"10011001" WHEN d = "0100" ELSE -- H"19"
"10010010" WHEN d = "0101" ELSE -- H"12"
"10000010" WHEN d = "0110" ELSE -- H"02"
"11111000" WHEN d = "0111" ELSE -- H"78"
"10000000" WHEN d = "1000" ELSE -- H"00"
"10010000" WHEN d = "1001" ELSE -- H"10"
"10001000" WHEN d = "1010" ELSE -- H"08"
"10000011" WHEN d = "1011" ELSE -- H"03"
"11000110" WHEN d = "1100" ELSE -- H"46"
"10100001" WHEN d = "1101" ELSE -- H"21"
"10000110" WHEN d = "1110" ELSE -- H"06"
"10001110"; -- H"0E"

END display;