3x3 Led "Timer"

Development Boards Arduino
1

I need help on how to create a 3x3 led blink program that displays numbers 1-9 in a loop. Please give code and picture of wiring if possible.

2

Here is some source for a BCD to 7-segment converter which can be easily adapted to a 3x3 matrix. Since I don’t know what your project board looks like, I can’t provide wiring but the beauty of an FPGA is you can assign the signals to any pin you want!

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

entity test is
port (
      clk : in std_logic;
        bcd : in std_logic_vector(3 downto 0);  --BCD input
        segment7 : out std_logic_vector(6 downto 0)  -- 7 bit decoded output.
    );
end test;
--'a' corresponds to MSB of segment7 and g corresponds to LSB of segment7.
architecture Behavioral of test is

begin
process (clk,bcd)
BEGIN
if (clk'event and clk='1') then
case  bcd is
when "0000"=> segment7 <="0000001";  -- '0'
when "0001"=> segment7 <="1001111";  -- '1'
when "0010"=> segment7 <="0010010";  -- '2'
when "0011"=> segment7 <="0000110";  -- '3'
when "0100"=> segment7 <="1001100";  -- '4' 
when "0101"=> segment7 <="0100100";  -- '5'
when "0110"=> segment7 <="0100000";  -- '6'
when "0111"=> segment7 <="0001111";  -- '7'
when "1000"=> segment7 <="0000000";  -- '8'
when "1001"=> segment7 <="0000100";  -- '9'
 --nothing is displayed when a number more than 9 is given as input. 
when others=> segment7 <="1111111"; 
end case;
end if;

end process;

end Behavioral;

-Bill

3

@phalanx Thanks for your help.