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  #1
/*******************************************************************************/
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                            [1 :0]         iavs_address        ,//地址,译码后确定寄存器offset
    input                                         iavs_write            ,//写使能信号
    input                            [31:0]         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                     [7 :0]         oLCD1602_DAT         //                                
);  
//-------------------------------------------------------------------------------
wire            oLCD1602_RS_N    ;//
wire         oLCD1602_RW_N    ;//
wire          oLCD1602_EN_N    ;//
wire  [7:0]  oLCD1602_DAT_N    ;//    

//LCD1602_RS
always@(posedge icsi_clk or negedge ireset_n)begin
    if(!ireset_n)
        oLCD1602_RS <= 1'h0;
    else
        oLCD1602_RS <= oLCD1602_RS_N    ;//
end
assign oLCD1602_RS_N = ((iavs_write && iavs_chipselect) && (iavs_address == 2'h0)) ? iavs_writedata[0] : oLCD1602_RS;

//LCD1602_RW
always@(posedge icsi_clk or negedge ireset_n)begin
    if(!ireset_n)
        oLCD1602_RW <= 1'h0;
    else
        oLCD1602_RW <= oLCD1602_RW_N    ;//
end
assign oLCD1602_RW_N = ((iavs_write && iavs_chipselect) && (iavs_address == 2'h1)) ? iavs_writedata[0] : oLCD1602_RW;

//LCD1602_EN
always@(posedge icsi_clk or negedge ireset_n)begin
    if(!ireset_n)
        oLCD1602_EN <= 1'h0;
    else
        oLCD1602_EN <= oLCD1602_EN_N    ;//
end
assign oLCD1602_EN_N = ((iavs_write && iavs_chipselect) && (iavs_address == 2'h2)) ? iavs_writedata[0] : oLCD1602_EN;

//LCD1602_DAT
always@(posedge icsi_clk or negedge ireset_n)begin
    if(!ireset_n)
        oLCD1602_DAT <= 8'h0;
    else
        oLCD1602_DAT <= oLCD1602_DAT_N    ;//
end
assign oLCD1602_DAT_N = ((iavs_write && iavs_chipselect) && (iavs_address == 2'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(0);//LCD_RS = 0;
    usleep(5000);
    LCD_DATA(com);//LCD_DATA = com;
    usleep(5000);
    LCD_EN(1);//LCD_EN = 1;
    usleep(5000);
    LCD_EN(0);//LCD_EN = 0;
    usleep(5000);
}
/*Write Data*/
void Write_Data(alt_u8 data)
{
    LCD_RS(1);// LCD_RS = 1;
    usleep(5000);
    LCD_DATA(data);//LCD_DATA = data;
    usleep(5000);
    LCD_EN(1);//LCD_EN = 1;
    usleep(5000);
    LCD_EN(0);//LCD_EN = 0;
    usleep(5000);
}
/*LCD 1602 Initialization*/
void LCD_Init(void)
{
    LCD_EN(0);// LCD_EN = 0;
    LCD_RW(0);//LCD_RW = 0;
    usleep(5000);
    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 == 0)
        addr = 0x80 + col;
    else
        addr = 0xC0 + col;
    Write_Com(addr);
    //while(*(pCN) != '\0')
    for(i=0; i<strlen(pCN); i++)
    {
        Write_Data(*(pCN+i));
    }
}

int main(void)
{
    LCD_Init();
    LCD_Display(0,0,(alt_u8*)"Avalon-MM IP2012");
    LCD_Display(1,0,(alt_u8*)" Made By Na Xia");
    while(1)
    {
    
    }
}