说明：  LCD driver接口，可以直接驱动LCD，在zedboard上验证过，没有问题
(interface description //lcd interface output lcd_dclk, //lcd pixel clock output lcd_blank, //lcd blank output lcd_sync, //lcd sync output lcd_hs, //lcd horizontal sync output lcd_vs, //lcd vertical sync output lcd_en, //lcd display enable output [23:0] lcd_rgb, //lcd display data //user interface output lcd_request, //lcd data request output [10:0] lcd_xpos, //lcd horizontal coordinate output [10:0] lcd_ypos, //lcd vertical coordinate input [23:0] lcd_data //lcd data)