simple_top.v

module ov5640_top(
  // DDR Interface
  output [12:0] DDR2_0_addr,
  output [ 2:0] DDR2_0_ba,
  output        DDR2_0_cas_n,
  output        DDR2_0_ck_n,
  output        DDR2_0_ck_p,
  output        DDR2_0_cke,
  output        DDR2_0_cs_n,
  output [ 1:0] DDR2_0_dm,
  inout  [15:0] DDR2_0_dq,
  inout  [ 1:0] DDR2_0_dqs_n,
  inout  [ 1:0] DDR2_0_dqs_p,
  output        DDR2_0_odt,
  output        DDR2_0_ras_n,
  output        DDR2_0_we_n,

  // System clock and reset
  input         sys_clock,
  input         reset,

  // VGA Interface
  output [ 3:0] vga_blue,
  output [ 3:0] vga_green,
  output [ 3:0] vga_red,
  output        vga_hsync,
  output        vga_vsync,

  // Camera Interface
  input         OV5640_PCLK,
  output        OV5640_XCLK,
  input         OV5640_VSYNC,
  input         OV5640_HREF,
  input  [ 7:0] OV5640_D,
  output        OV5640_RESET,
  output        OV5640_PWDN,
  inout         IIC_0_scl_io,
  inout         IIC_0_sda_io
);

////////////////////////////////////////////////////////////////////////////////
// Wires
////////////////////////////////////////////////////////////////////////////////

wire [ 3:0] frame_in_tkeep;
wire [31:0] frame_in_tdata;
wire [23:0] data_out;
wire        frame_in_tlast;
wire        frame_in_tready;
wire        frame_in_tuser;
wire        frame_in_tvalid;

wire [5:0] w_vga_green;
wire [5:0] w_vga_red;
wire [5:0] w_vga_blue;

////////////////////////////////////////////////////////////////////////////////
// Outputs
////////////////////////////////////////////////////////////////////////////////

// Force powerdown and reset to enable the camera
assign OV5640_RESET = 1'b1;
assign OV5640_PWDN = 1'b0;

// Output the top four bits per channel
assign vga_blue = w_vga_blue[5:2];
assign vga_red = w_vga_red[5:2];
assign vga_green = w_vga_green[5:2];

////////////////////////////////////////////////////////////////////////////////
// Instantiations
////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////
// Primary Block Design
////////////////////////////////////////

design_1_wrapper (
    .DDR2_0_addr    (DDR2_0_addr),
    .DDR2_0_ba      (DDR2_0_ba),
    .DDR2_0_cas_n   (DDR2_0_cas_n),
    .DDR2_0_ck_n    (DDR2_0_ck_n),
    .DDR2_0_ck_p    (DDR2_0_ck_p),
    .DDR2_0_cke     (DDR2_0_cke),
    .DDR2_0_cs_n    (DDR2_0_cs_n),
    .DDR2_0_dm      (DDR2_0_dm),
    .DDR2_0_dq      (DDR2_0_dq),
    .DDR2_0_dqs_n   (DDR2_0_dqs_n),
    .DDR2_0_dqs_p   (DDR2_0_dqs_p),
    .DDR2_0_odt     (DDR2_0_odt),
    .DDR2_0_ras_n   (DDR2_0_ras_n),
    .DDR2_0_we_n    (DDR2_0_we_n),
    .IIC_0_scl_io   (IIC_0_scl_io),
    .IIC_0_sda_io   (IIC_0_sda_io),
    .frame_in_tdata (frame_in_tdata),
    .frame_in_tkeep (frame_in_tkeep),
    .frame_in_tlast (frame_in_tlast),
    .frame_in_tready(frame_in_tready),
    .frame_in_tuser (frame_in_tuser),
    .frame_in_tvalid(frame_in_tvalid),
    .s2mm_fsync_0   (OV5640_VSYNC),
    .pclk           (OV5640_PCLK),
    .reset          (reset),
    .sys_clock      (sys_clock),
    .vga_blue       (w_vga_blue),
    .vga_clk        (),
    .vga_de         (),
    .vga_dps        (),
    .vga_green      (w_vga_green),
    .vga_hsync      (vga_hsync),
    .vga_red        (w_vga_red),
    .vga_vsync      (vga_vsync),
    .xclk           (OV5640_XCLK));

// Pack incoming pixels into 32-bits 
assign frame_in_tdata = {8'b0, data_out};
assign frame_in_tkeep = 4'b1111;
assign frame_in_tuser = 4'b0001;

////////////////////////////////////////
// Capture Input from OV5640 Camera
////////////////////////////////////////

ov5640_capture capture(
 		.pclk  (OV5640_PCLK),
 		.vsync (OV5640_VSYNC),
 		.href  (OV5640_HREF),
 		.d     (OV5640_D),
 		.dout  (data_out),
 		.valid (frame_in_tvalid),
    .last  (frame_in_tlast)
);

endmodule