help about OV7620 i want to interface it with spartan 3

good morning all
i am a student in master degree and i am doing a project about a design and implementation an ov7620 interface on FPGA my board test is a spartan3a kit starter.
my question is about interfacing digital camera ov7620 with fpga spartan 3a to show the streaming to VGA monitor, but i am a beginner in VHDL, but after some knowledge in this field i understand some basic and know i am trying to write a VHDL block for this interface and testing this directly here is my begin program but i don t know how to continue and for this reason i need assistance .

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library UNISIM;
use UNISIM.VComponents.all;

-----------------------------------------------------------------------
entity cam_interface is
-----------------------------------------------------------------------
port (
clk_i : in std_logic;
rst_i : in std_logic;

-- camera side

Y_i : in std_logic_vector(7 downto 0);
UV_i : in std_logic_vector(7 downto 0);
PCLK_i : in std_logic;
HREF_i : in std_logic;
VSYNC_i : in std_logic;


-- FPGA side
R_o : out std_logic_vector(7 downto 0);
G_o : out std_logic_vector(7 downto 0);
B_o : out std_logic_vector(7 downto 0);

-- this signal indicate a new line on falling edge and rising edge
new_pix_o : out std_logic;
new_line_o : out std_logic;
new_frame_o : out std_logic;
rst_camera_o : out std_logic
);
end cam_interface;

till here i don t know how to continue than hope that i will get some help from the members
i want to get the output 16/8 bit Raw RGB
i know for this i must write some register with I2C interface

thankssssssss in advance