每天进步一点点------SOPC的Avalon-MM IP核(三) LCD1602 IP定制

注：Avalon信号类型命名参考图

  /*********************************************************************************
 * Company                    :
 * Engineer                    : 空气微凉
 *
 * Create Date                : 00:00:00 22/03/2013
 * Design Name                :
 * Module Name                :
 * Project Name                :
 * Target Devices            :
 * Tool versions                :
 * Description                :
 *                                   http://www.cnblogs.com/kongqiweiliang/
 * Dependencies                :
 *                                Avalon_MM_Slave_IP
 * Revision                    :
 * Revision                    : 0.01 - File Created
 * Additional Comments        :
 ********************************************************************************/
 `timescale 1ns/1ps
 `define    UD  #
 /*******************************************************************************/
 module Avalon_MM_Slave_LCD1602
 (
     //clock input
     input                                         icsi_clk            ,//
     input                                         ireset_n             ,//
     //Avalon_MM_Slave interface
     input                                         iavs_chipselect        ,//片选信号
     input                            [ :]         iavs_address        ,//地址,译码后确定寄存器offset
     input                                         iavs_write            ,//写使能信号
     input                            [:]         iavs_writedata        ,//32位写数据值
     //input                                         iavs_read            ,//读时能信号
     //input                            [31:0]         iavs_readdata        ,//32位读数据值
     //input                                         iavs_byteenable         //字节使能信号
     //hardware interface(Conduit End)
     output  reg                                 oLCD1602_RS            ,//
     output  reg                                 oLCD1602_RW            ,//
     output  reg                                 oLCD1602_EN            ,//
     output  reg                     [ :]         oLCD1602_DAT         //
 );
 //-------------------------------------------------------------------------------
 wire            oLCD1602_RS_N    ;//
 wire         oLCD1602_RW_N    ;//
 wire          oLCD1602_EN_N    ;//
 wire  [:]  oLCD1602_DAT_N    ;//    

 //LCD1602_RS
 always@(posedge icsi_clk or negedge ireset_n)begin
     if(!ireset_n)
         oLCD1602_RS <= 'h0;
     else
         oLCD1602_RS <= oLCD1602_RS_N    ;//
 end
 assign oLCD1602_RS_N = ((iavs_write && iavs_chipselect) && (iavs_address == 'h0)) ? iavs_writedata[0] : oLCD1602_RS;

 //LCD1602_RW
 always@(posedge icsi_clk or negedge ireset_n)begin
     if(!ireset_n)
         oLCD1602_RW <= 'h0;
     else
         oLCD1602_RW <= oLCD1602_RW_N    ;//
 end
 assign oLCD1602_RW_N = ((iavs_write && iavs_chipselect) && (iavs_address == 'h1)) ? iavs_writedata[0] : oLCD1602_RW;

 //LCD1602_EN
 always@(posedge icsi_clk or negedge ireset_n)begin
     if(!ireset_n)
         oLCD1602_EN <= 'h0;
     else
         oLCD1602_EN <= oLCD1602_EN_N    ;//
 end
 assign oLCD1602_EN_N = ((iavs_write && iavs_chipselect) && (iavs_address == 'h2)) ? iavs_writedata[0] : oLCD1602_EN;

 //LCD1602_DAT
 always@(posedge icsi_clk or negedge ireset_n)begin
     if(!ireset_n)
         oLCD1602_DAT <= 'h0;
     else
         oLCD1602_DAT <= oLCD1602_DAT_N    ;//
 end
 assign oLCD1602_DAT_N = ((iavs_write && iavs_chipselect) && (iavs_address == 'h3)) ? iavs_writedata[7:0] : oLCD1602_DAT;
 //-------------------------------------------------------------------------------
 endmodule 

 /*********************************************************************************
 * Company                   :
 * Engineer                  : 空气微凉
 *
 * Create Date               : 00:00:00 22/03/2013
 * Design Name               :
 * Module Name               :
 * Project Name              :
 * Target Devices            :
 * Tool versions             :
 * Description               :
 *
 * Dependencies              :
 *
 * Revision                  :
 * Revision                  : 0.01 - File Created
 * Additional Comments       :
 ********************************************************************************/
 #include <stdio.h>
 #include <string.h>
 #include "system.h"
 #include "altera_avalon_pio_regs.h"
 #include "alt_types.h"
 #include "unistd.h"

 #define LCD_RS(data)       IOWR(OLCD1602_BASE, 0, data)
 #define LCD_RW(data)       IOWR(OLCD1602_BASE, 1, data)
 #define LCD_EN(data)       IOWR(OLCD1602_BASE, 2, data)
 #define LCD_DATA(data)     IOWR(OLCD1602_BASE, 3, data)

 //#define    LCD1602_ADDR    (OLCD1602_BASE | (1<<31))
 //#define    LCD_RS          (*(volatile unsigned int*)(LCD1602_ADDR + 0x00))
 //#define    LCD_RW          (*(volatile unsigned int*)(LCD1602_ADDR + 0x04))
 //#define    LCD_EN          (*(volatile unsigned int*)(LCD1602_ADDR + 0x08))
 //#define    LCD_DATA        (*(volatile unsigned int*)(LCD1602_ADDR + 0x0C))

 /*Write Command*/
 void Write_Com(alt_u8 com)
 {
     LCD_RS();//LCD_RS = 0;
     usleep();
     LCD_DATA(com);//LCD_DATA = com;
     usleep();
     LCD_EN();//LCD_EN = 1;
     usleep();
     LCD_EN();//LCD_EN = 0;
     usleep();
 }
 /*Write Data*/
 void Write_Data(alt_u8 data)
 {
     LCD_RS();// LCD_RS = 1;
     usleep();
     LCD_DATA(data);//LCD_DATA = data;
     usleep();
     LCD_EN();//LCD_EN = 1;
     usleep();
     LCD_EN();//LCD_EN = 0;
     usleep();
 }
 /*LCD 1602 Initialization*/
 void LCD_Init(void)
 {
     LCD_EN();// LCD_EN = 0;
     LCD_RW();//LCD_RW = 0;
     usleep();
     Write_Com(0x38);
     Write_Com(0x0C);
     Write_Com(0x06);
     Write_Com(0x01);
     Write_Com(0x80);
 }
 void LCD_Display(alt_u8 row, alt_u8 col, alt_u8 *pCN)
 {
     alt_u8    i, addr;
     if(row == )
         addr = 0x80 + col;
     else
         addr = 0xC0 + col;
     Write_Com(addr);
     //while(*(pCN) != '\0')
     for(i=; i<strlen(pCN); i++)
     {
         Write_Data(*(pCN+i));
     }
 }

 int main(void)
 {
     LCD_Init();
     LCD_Display(,,(alt_u8*)"Avalon-MM IP2012");
     LCD_Display(,,(alt_u8*)" Made By Na Xia");
     while()
     {

     }
 }