注：Avalon信号类型命名参考图
1 /********************************************************************************* 2 * Company : 3 * Engineer : 空气微凉 4 * 5 * Create Date : 00:00:00 22/03/2013 6 * Design Name : 7 * Module Name : 8 * Project Name : 9 * Target Devices : 10 * Tool versions : 11 * Description : 12 * http://www.cnblogs.com/kongqiweiliang/ 13 * Dependencies : 14 * Avalon_MM_Slave_IP 15 * Revision : 16 * Revision : 0.01 - File Created 17 * Additional Comments : 18 ********************************************************************************/ 19 `timescale 1ns/1ps 20 `define UD #1 21 /*******************************************************************************/ 22 module Avalon_MM_Slave_LCD1602 23 ( 24 //clock input 25 input icsi_clk ,// 26 input ireset_n ,// 27 //Avalon_MM_Slave interface 28 input iavs_chipselect ,//片选信号 29 input [1 :0] iavs_address ,//地址,译码后确定寄存器offset 30 input iavs_write ,//写使能信号 31 input [31:0] iavs_writedata ,//32位写数据值 32 //input iavs_read ,//读时能信号 33 //input [31:0] iavs_readdata ,//32位读数据值 34 //input iavs_byteenable //字节使能信号 35 //hardware interface(Conduit End) 36 output reg oLCD1602_RS ,// 37 output reg oLCD1602_RW ,// 38 output reg oLCD1602_EN ,// 39 output reg [7 :0] oLCD1602_DAT // 40 ); 41 //------------------------------------------------------------------------------- 42 wire oLCD1602_RS_N ;// 43 wire oLCD1602_RW_N ;// 44 wire oLCD1602_EN_N ;// 45 wire [7:0] oLCD1602_DAT_N ;// 46 47 //LCD1602_RS 48 always@(posedge icsi_clk or negedge ireset_n)begin 49 if(!ireset_n) 50 oLCD1602_RS <= 1'h0; 51 else 52 oLCD1602_RS <= oLCD1602_RS_N ;// 53 end 54 assign oLCD1602_RS_N = ((iavs_write && iavs_chipselect) && (iavs_address == 2'h0)) ? iavs_writedata[0] : oLCD1602_RS; 55 56 //LCD1602_RW 57 always@(posedge icsi_clk or negedge ireset_n)begin 58 if(!ireset_n) 59 oLCD1602_RW <= 1'h0; 60 else 61 oLCD1602_RW <= oLCD1602_RW_N ;// 62 end 63 assign oLCD1602_RW_N = ((iavs_write && iavs_chipselect) && (iavs_address == 2'h1)) ? iavs_writedata[0] : oLCD1602_RW; 64 65 //LCD1602_EN 66 always@(posedge icsi_clk or negedge ireset_n)begin 67 if(!ireset_n) 68 oLCD1602_EN <= 1'h0; 69 else 70 oLCD1602_EN <= oLCD1602_EN_N ;// 71 end 72 assign oLCD1602_EN_N = ((iavs_write && iavs_chipselect) && (iavs_address == 2'h2)) ? iavs_writedata[0] : oLCD1602_EN; 73 74 //LCD1602_DAT 75 always@(posedge icsi_clk or negedge ireset_n)begin 76 if(!ireset_n) 77 oLCD1602_DAT <= 8'h0; 78 else 79 oLCD1602_DAT <= oLCD1602_DAT_N ;// 80 end 81 assign oLCD1602_DAT_N = ((iavs_write && iavs_chipselect) && (iavs_address == 2'h3)) ? iavs_writedata[7:0] : oLCD1602_DAT; 82 //------------------------------------------------------------------------------- 83 endmodule
1 /********************************************************************************* 2 * Company : 3 * Engineer : 空气微凉 4 * 5 * Create Date : 00:00:00 22/03/2013 6 * Design Name : 7 * Module Name : 8 * Project Name : 9 * Target Devices : 10 * Tool versions : 11 * Description : 12 * 13 * Dependencies : 14 * 15 * Revision : 16 * Revision : 0.01 - File Created 17 * Additional Comments : 18 ********************************************************************************/ 19 #include <stdio.h> 20 #include <string.h> 21 #include "system.h" 22 #include "altera_avalon_pio_regs.h" 23 #include "alt_types.h" 24 #include "unistd.h" 25 26 #define LCD_RS(data) IOWR(OLCD1602_BASE, 0, data) 27 #define LCD_RW(data) IOWR(OLCD1602_BASE, 1, data) 28 #define LCD_EN(data) IOWR(OLCD1602_BASE, 2, data) 29 #define LCD_DATA(data) IOWR(OLCD1602_BASE, 3, data) 30 31 //#define LCD1602_ADDR (OLCD1602_BASE | (1<<31)) 32 //#define LCD_RS (*(volatile unsigned int*)(LCD1602_ADDR + 0x00)) 33 //#define LCD_RW (*(volatile unsigned int*)(LCD1602_ADDR + 0x04)) 34 //#define LCD_EN (*(volatile unsigned int*)(LCD1602_ADDR + 0x08)) 35 //#define LCD_DATA (*(volatile unsigned int*)(LCD1602_ADDR + 0x0C)) 36 37 /*Write Command*/ 38 void Write_Com(alt_u8 com) 39 { 40 LCD_RS(0);//LCD_RS = 0; 41 usleep(5000); 42 LCD_DATA(com);//LCD_DATA = com; 43 usleep(5000); 44 LCD_EN(1);//LCD_EN = 1; 45 usleep(5000); 46 LCD_EN(0);//LCD_EN = 0; 47 usleep(5000); 48 } 49 /*Write Data*/ 50 void Write_Data(alt_u8 data) 51 { 52 LCD_RS(1);// LCD_RS = 1; 53 usleep(5000); 54 LCD_DATA(data);//LCD_DATA = data; 55 usleep(5000); 56 LCD_EN(1);//LCD_EN = 1; 57 usleep(5000); 58 LCD_EN(0);//LCD_EN = 0; 59 usleep(5000); 60 } 61 /*LCD 1602 Initialization*/ 62 void LCD_Init(void) 63 { 64 LCD_EN(0);// LCD_EN = 0; 65 LCD_RW(0);//LCD_RW = 0; 66 usleep(5000); 67 Write_Com(0x38); 68 Write_Com(0x0C); 69 Write_Com(0x06); 70 Write_Com(0x01); 71 Write_Com(0x80); 72 } 73 void LCD_Display(alt_u8 row, alt_u8 col, alt_u8 *pCN) 74 { 75 alt_u8 i, addr; 76 if(row == 0) 77 addr = 0x80 + col; 78 else 79 addr = 0xC0 + col; 80 Write_Com(addr); 81 //while(*(pCN) != ' ') 82 for(i=0; i<strlen(pCN); i++) 83 { 84 Write_Data(*(pCN+i)); 85 } 86 } 87 88 int main(void) 89 { 90 LCD_Init(); 91 LCD_Display(0,0,(alt_u8*)"Avalon-MM IP2012"); 92 LCD_Display(1,0,(alt_u8*)" Made By Na Xia"); 93 while(1) 94 { 95 96 } 97 }