module data_gen(
    input  wire             clk_25      ,
    input  wire             vga_rst_n   ,
    input  wire [9: 0]      pixel_x     ,
    input  wire [9: 0]      pixel_y     ,

    output reg  [15: 0]     rgb_data
);
parameter RED = 16'hF800    , //红色
          ORANGE = 16'hFC00 , //橙色
          YELLOW = 16'hFFE0 , //黄色
          GREEN = 16'h07E0  , //绿色
          CYAN = 16'h07FF   , //青色
          BLUE = 16'h001F   , //蓝色
          PURPPLE = 16'hF81F, //紫色
          BLACK = 16'h0000  , //黑色
          WHITE = 16'hFFFF  , //白色
          GRAY = 16'hD69A   ;
always @(posedge clk_25 or negedge vga_rst_n)begin
    if(!vga_rst_n)begin
        rgb_data <= 16'h0000;
    end 
    else if((pixel_x >= 0) && (pixel_x < 47))begin
        rgb_data <= RED;
    end 
    else if((pixel_x >=48) && (pixel_x < 95))begin
        rgb_data <= ORANGE;
    end 
    else if((pixel_x >= 96) && (pixel_x < 143))begin
        rgb_data <= YELLOW;
    end
    else if((pixel_x >=  144) && (pixel_x < 192)) begin
        rgb_data <= GREEN;
    end
    else if((pixel_x >= 192) && (pixel_x <  240)) begin
        rgb_data <= CYAN;
    end
    else if((pixel_x >= 240) && (pixel_x <  288)) begin
        rgb_data <= BLUE;
    end
    else if((pixel_x >= 288) && (pixel_x <  336)) begin
        rgb_data <= PURPPLE;
    end
    else if((pixel_x >=  336) && (pixel_x < 384)) begin
        rgb_data <= BLACK;
    end
    else if((pixel_x >= 384) && (pixel_x <  432)) begin
        rgb_data <= WHITE;
    end
    else if((pixel_x >= 432) && (pixel_x < 480))begin
        rgb_data <= GRAY;
    end 
    else begin
        rgb_data <= 16'h0000;
    end 
end 
endmodule