a8序：利用DP-FPGA与精电蓬远液晶MDLS16265B测试通过library IEEE; ----利用DP-FPGA与精电蓬远液晶MDLS16265B测试 use IEEE.STD_LOGIC_1164.ALL; --显示magic!use IEEE.STD_LOGIC_ARITH.ALL; --与上面程序功能相同，但显示速度很快，基本看不清光标的闪烁移位use IEEE.STD_LOGIC_UNSIGNED.ALL;entity lcd_display is generic(N:integer:=25000; delay:integer:=1); --改了此延时，造成该情况发生！Port ( clk : in std_logic; reset:in std_logic; --定义一个拔盘 lcdda : out std_logic; lcdrw : out std_logic; lcden : out std_logic; test : out std_logic_vector(7 downto 0) ); end lcd_display;architecture Behavioral of lcd_display is type state is (set_dlnf,clear_lcd,set_cursor,set_dcb,set_location,write_data);signal current_state:state;type rom is array(0 to 5) of std_logic_vector(7 downto 0);constant datarom:rom:=(("01001101"),("01000001"),("01000111"),("01001001"),("01000011"),("00100001"));signal clkk:std_logic;signal data : std_logic_vector(7 downto 0);