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-- Company: 
-- Engineer: 
-- 
-- Create Date: 12/16/2021 09:57:33 PM
-- Design Name: 
-- Module Name: snakeRam - Behavioral
-- Project Name: 
-- Target Devices: 
-- Tool Versions: 
-- Description: 
-- 
-- Dependencies: 
-- 
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
-- 
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library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
use IEEE.NUMERIC_STD.ALL;

library ourTypes;
use ourTypes.types.all;

-- Uncomment the following library declaration if instantiating
-- any Xilinx leaf cells in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

entity snakeRam is
    generic (
        length : integer;
        addressSize : integer;
        dataSize : integer
    );
    Port ( addresses : in addresses;
           clk1 : in std_logic;
           output : out std_logic_vector_array(0 to 8)(dataSize-1 downto 0);
           
           address2 : in unsigned(addressSize-1 downto 0);
           dataIn2 : in std_logic_vector(dataSize-1 downto 0);
           dataOut2 : out std_logic_vector(dataSize-1 downto 0);
           writeEnable2 : in STD_LOGIC;
           clk2 : in STD_LOGIC);
end snakeRam;

architecture Behavioral of snakeRam is
type listData is array(0 to length-1) of std_logic_vector(dataSize-1 downto 0);
signal mem : listData := (others => (others => '0'));
begin

process(clk1)
begin
    if(clk1'event and clk1 = '1') then
        for i in addresses'LOW to addresses'HIGH loop
            output(i) <= mem(to_integer(addresses(i)));
        end loop;
    end if;
end process;

process(clk2)
begin
    if(clk2'event and clk2 = '1') then
        if(writeEnable2 = '1') then
            mem(to_integer(address2)) <= dataIn2;
        else 
            dataOut2 <= mem(to_integer(address2));
        end if;
    end if;
end process;
end Behavioral;