HDMI

module HDMI(
      input CLK_100MHZ_i,
      input sys_rst_n_i,
      output hdmi_clk_o,
      output hdmi_blank_o,
      output hdmi_hs_o,
      output hdmi_vs_o,
      output [7:0]hdmi_rgb_r_o,
      output [7:0]hdmi_rgb_g_o,
      output [7:0]hdmi_rgb_b_o
      );

      parameter BLACK_RGB  = {8'd0,8'd0,8'd0};
      parameter BLUE_RGB = {8'd0,8'd0,8'd255};
      parameter GREEN_RGB  = {8'd0,8'd255,8'd0};
      parameter CYAN_RGB = {8'd0,8'd255,8'd255};
      parameter RED_RGB = {8'd255,8'd0,8'd0};
      parameter PURPLE_RGB = {8'd255,8'd0,8'd255};
      parameter YELLOW_RGB = {8'd255,8'd255,8'd0};
      parameter WHITE_RGB  = {8'd255,8'd255,8'd255};

parameter H_DISP=12'd1920;

wire[11:0]x_pos;
wire[11:0]y_pos;
wire data_en;
wire data_request;

wire [7:0]rgb_r;
wire [7:0]rgb_g;
wire [7:0]rgb_b;

wire clk_40m;
wire clk_65m;
wire clk_106_5m;
wire clk_108m;
wire clk_148_5m;

wire used_clk;
   dcm_148_5m dcm_148_5m
   (
   // Clock in ports
   .clk_in1( CLK_100MHZ_i),    // input clk_in1
   // Clock out ports
   .clk_out1(clk_148_5m));
   hdmi_driver hdmi_driver_u0(
         .rst_n_i(sys_rst_n_i),
         .clk_i(used_clk),
         .rgb_r_i(rgb_r),
         .rgb_g_i(rgb_g),
         .rgb_b_i(rgb_b),

         .data_requst_o(data_requst),
         .x_pos_o(x_pos),
         .y_pos_o(y_pos),

         .clk_o(hdmi_clk_o),
         .hs_o(hdmi_hs_o),
         .vs_o(hdmi_vs_o),
         .blank_o(hdmi_blank_o),
         .rgb_r_o(hdmi_rgb_r_o),
         .rgb_g_o(hdmi_rgb_g_o),
         .rgb_b_o(hdmi_rgb_b_o)
      );

   //assign used_clk = clk_40m;
   //assign used_clk = clk_65m;
   //assign used_clk = clk_106_5m;
   //assign used_clk = clk_108m;
   assign used_clk = clk_148_5m;

   reg[7:0]red_data;
   reg[7:0]green_data;
   reg[7:0]blue_data;

   always@(posedge used_clk)
   begin
         if(data_requst)//-数据请求-//
            begin
            case(x_pos)

            12'd1:    //-输出绿色RGB值-//
               begin
               {red_data,green_data,blue_data} <= GREEN_RGB;
               end
            (H_DISP/8)*1://-输出蓝色RGB值-//
               begin
               {red_data,green_data,blue_data} <= BLUE_RGB;
               end
            (H_DISP/8)*2://-输出黑色RGB值-//
               begin
               {red_data,green_data,blue_data} <= BLACK_RGB;
               end
            (H_DISP/8)*3://-输出青色RGB值-//
               begin
               {red_data,green_data,blue_data} <= CYAN_RGB;
               end
            (H_DISP/8)*4://-输出红色RGB值-//
               begin
               {red_data,green_data,blue_data} <= RED_RGB;
               end
            (H_DISP/8)*5://-输出紫色RGB值-//
               begin
               {red_data,green_data,blue_data} <= PURPLE_RGB;
               end
            (H_DISP/8)*6://-输出黄色RGB值-//
               begin
               {red_data,green_data,blue_data} <= YELLOW_RGB;
               end
            (H_DISP/8)*7://-输出白色RGB值-//
               begin
               {red_data,green_data,blue_data} <= WHITE_RGB;
               end
            default://-数据保持不变-//
               begin
               {red_data,green_data,blue_data} <= {red_data,green_data,blue_data};
               end
            endcase
            end
         else
            begin
            {red_data,green_data,blue_data} <= {8'd0,8'd0,8'd0};
            end
   end

   assign {rgb_r,rgb_g,rgb_b} = {red_data,green_data,blue_data};

   endmodule

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