LCD1602液晶显示器设计VHDL代码Quartus DE2-115开发板

名称：LCD1602液晶显示器设计VHDL代码Quartus? DE2-115开发板

软件：Quartus

语言：VHDL

代码功能：LCD1602液晶显示器设计

FPGA代码Verilog/VHDL代码资源下载：www.hdlcode.com

本代码已在DE2-115开发板验证，DE2-115开发板如下，其他开发板可以修改管脚适配：

演示视频：

设计文档：

1.?工程文件

2.?程序文件

3.?程序编译

4.?管脚分配

5.?Testbench

6.?仿真图

部分代码展示:

LIBRARY?ieee;
???USE?ieee.std_logic_1164.all;
???USE?ieee.std_logic_unsigned.all;
--?This?is?the?template?for?Lab01.??You?should?start?with?this;
--?it?will?make?your?life?easier.
ENTITY?lab1?IS
???PORT?(
??????clk_in????:?IN?STD_LOGIC;--时钟
????????KEY?:?in?std_logic_vector(3?downto?0);??--?pushbutton?switches
????????SW?:?in?std_logic_vector(8?downto?0);??--?slide?switches
????????LEDG?:?out?std_logic_vector(7?downto?0);?--?green?LED's?(you?might?want?to?use
?????????????????????????????????????????????????--?this?to?display?your?current?state)
????????LCD_RW?:?out?std_logic;??--?R/W?control?signal?for?the?LCD
????????LCD_EN?:?out?std_logic;??--?Enable?control?signal?for?the?LCD
????????LCD_RS?:?out?std_logic;??--?Whether?or?not?you?are?sending?an?instruction?or?character
????????LCD_ON?:?out?std_logic;??--?used?to?turn?on?the?LCD
????????LCD_BLON?:?out?std_logic;?--?used?to?turn?on?the?backlight
????????LCD_DATA?:?out?std_logic_vector(7?downto?0));??--?used?to?send?instructions?or?characters
END?lab1;
ARCHITECTURE?behave?OF?lab1?IS
???
???SIGNAL?clk?????????:?STD_LOGIC;
???SIGNAL?clk_1Hz?????:?STD_LOGIC;
???SIGNAL?rst_n???????:?STD_LOGIC;
???SIGNAL?dir?????????:?STD_LOGIC;
???
???SIGNAL?div_cnt?????:?STD_LOGIC_VECTOR(25?DOWNTO?0);
???
???type?current_state???is(
???????????????????????????Send_38??,
???????????????????????????Send_0x38,
???????????????????????????Send_0x0c,
???????????????????????????Send_0x01,
???????????????????????????Send_0x06,
???????????????????????????Send_0x80,
???????????????????????????Send_Z???,
???????????????????????????Send_h???,
???????????????????????????Send_o???,
???????????????????????????Send_u???,
???????????????????????????Send_y???);
SIGNAL?state?:?current_state?;
????SIGNAL?led_state?????:?STD_LOGIC_VECTOR(6?DOWNTO?0);
BEGIN
???LCD_BLON?<=?'1';
???LCD_ON?<=?'1';
???LCD_EN?<=?clk_1Hz;
???LCD_RW?<=?'0';
???--clk?<=clk_in;--?仿真用该句
???clk?<=clk_1Hz;--?实际上板验证用该句
???--clk?<=KEY(0);
???rst_n?<=?KEY(3);
???dir?<=?SW(0);
???
--时钟分频计数，计数50000000
???PROCESS?(clk_in,?rst_n)
???BEGIN
??????IF?((NOT(rst_n))?=?'1')?THEN
?????????div_cnt?<=?"00000000000000000000000000";
??????ELSIF?(clk_in'EVENT?AND?clk_in?=?'1')?THEN
?????????IF?(div_cnt?>=?"10111110101111000010000000")?THEN
????????????div_cnt?<=?"00000000000000000000000000";
?????????ELSE
????????????div_cnt?<=?div_cnt?+?"00000000000000000000000001";
?????????END?IF;
??????END?IF;
???END?PROCESS;

点击链接获取代码文件：http://www.hdlcode.com/index.php?m=home&c=View&a=index&aid=1193