VGA显示

module    vga_control(
        //syste,        clk
        input                clk,
        input                rst_n,
        //vga            interface
        input        [9:0]    hx,
        input        [9:0]    vy,
        output    reg    [23:0]    rgb,
        //pinlv            interface
        input        [31:0]    pinlv
);


reg        [6:0]        add;
wire    [31:0]        q;

wire                display_value;
assign                display_value = ((hx >0 && hx < 33)&&(vy > 0 && vy < 97)) ? 1 : 0;


always @(posedge clk or negedge rst_n)
begin
    if(!rst_n)
        add <= 0;
    else if(display_value)
        add <= vy ;
    else
        add <= 0;
end

always @(posedge clk or negedge rst_n)
begin
    if(!rst_n)
        rgb <= 0;
    else if(display_value && q[32 - hx])
        rgb <= 24‘h666666;
    else if(!display_value)
        rgb <= 24‘h888888;
    else
        rgb <= 0;
end



rom    rom_inst (
    .address ( add ),
    .clock ( clk ),
    .q ( q )
    );


endmodule