`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company: 
// Engineer: 
// 
// Create Date:    15:31:29 03/11/2011 
// Design Name: 
// Module Name:    lcdcs7 
// Project Name: 
// Target Devices: 
// Tool versions: 
// Description: 
//
// Dependencies: 
//
// Revision: 
// Revision 0.01 - File Created 
// Additional Comments: 
//
//////////////////////////////////////////////////////////////////////////////////
module lcdcs7(clk_50,lcd_data,lcd_rw,lcd_rs,lcd_en);
input clk_50;
output [3:0] lcd_data;
output lcd_rw,lcd_rs,lcd_en;
reg [3:0] lcd_data;
reg lcd_rs;
reg lcd_en;
reg clk_1k=1'b0;
reg [20:0] counter=0;
reg [10:0] counter1=0;
 
assign lcd_rw=0;
always@(posedge clk_50)

       if(counter==25000)
            begin
            clk_1k<=~clk_1k;
             counter<=0;
            end
        else counter<=counter+1;
		  
		  
always@(posedge clk_1k)
 begin
   if(counter1<1223)
	begin
   counter1<=counter1+1;
   
    case (counter1)
     400:begin
         lcd_data<=4'b0010;  //0x28 设置显示模式
	     lcd_rs<=1'b0;
		 end
     401:lcd_en<=1'b1;
	  
	  411:begin
         lcd_data<=4'b1000;  //0x28 设置显示模式
	     lcd_rs<=1'b0;
		 end
     412:lcd_en<=1'b1;
	  422:begin
         lcd_data<=4'b0010;  //0x28 设置显示模式
	     lcd_rs<=1'b0;
		 end
     423:lcd_en<=1'b1;
	  
	  433:begin
         lcd_data<=4'b1000;  //0x28 设置显示模式
	     lcd_rs<=1'b0;
		 end
     434:lcd_en<=1'b1;
	  444:begin
         lcd_data<=4'b0010;  //0x28 设置显示模式
	     lcd_rs<=1'b0;
		 end
     445:lcd_en<=1'b1;
	  
	  455:begin
         lcd_data<=4'b1000;  //0x28 设置显示模式
	     lcd_rs<=1'b0;
		 end
     456:lcd_en<=1'b1;
    
	 466:                      //0x08  开显示 关光标
	      begin
	      lcd_data<=4'b0000;
	      lcd_rs<=1'b0;
	      end
	 467:  lcd_en<=1'b1;
	 
	 477:
	  begin
	      lcd_data<=4'b1000;
	      lcd_rs<=1'b0;
	      end
	 478:  lcd_en<=1'b1;
	
	488:     begin              //0x01 清屏??	     
       	lcd_data<=4'b0000;
	      lcd_rs<=1'b0;
	      end
	489:  lcd_en<=1'b1; 
	
	499:
	 begin              //0x01 清屏幕
	      lcd_data<=4'b0001;
	      lcd_rs<=1'b0;
	      end
	500:  lcd_en<=1'b1;
	
	510: begin              //0x06 读或者写后 自动加1
	      lcd_data<=4'b0000;
	      lcd_rs<=1'b0;
	      end
	511:  lcd_en<=1'b1; 
	 
	 521: begin              //0x06 读或者写后 自动加1
	      lcd_data<=4'b0110;
	      lcd_rs<=1'b0;
	      end
	522:  lcd_en<=1'b1; 
	
	
	532:begin              //0x0c  
	      lcd_data<=4'b0000;
	      lcd_rs<=1'b0;
	      end
	533:  begin
	      lcd_en<=1'b1; 
	      end
			
	543:begin              //0x0c  
	      lcd_data<=4'b1100;
	      lcd_rs<=1'b0;
	      end
	544:  begin
	      lcd_en<=1'b1;
			end
			
	554:  begin              
	      lcd_data<=4'h8;      //定位
	      lcd_rs<=1'b0;
	      end 
	555:  lcd_en<=1'b1; 
	
	565:  begin              //
	      lcd_data<=4'h0;
	      lcd_rs<=1'b0;
	      end
	566:  lcd_en<=1'b1;
	
	576:  begin              //write data  W
	      lcd_data<=4'h7;
	      lcd_rs<=1'b1;
	      end 
	577:  lcd_en<=1'b1; 
	
	579:  begin            
	      lcd_data<=4'h1;
	      lcd_rs<=1'b1;
	      end
	580:  lcd_en<=1'b1;
	
	598:  begin              ///////////////
	      lcd_data<=4'h6;
	      lcd_rs<=1'b1;
	      end 
	599:  lcd_en<=1'b1; 
	
	609:  begin              
	      lcd_data<=4'h9;
	      lcd_rs<=1'b1;
	      end
	610:  lcd_en<=1'b1;
	620:  begin              //write data  W
	      lcd_data<=4'h7;
	      lcd_rs<=1'b1;
			lcd_en<=1'b1;
	      end 
	//621:   
	
	631:  begin              
	      lcd_data<=4'h5;
	      lcd_rs<=1'b1;
			lcd_en<=1'b1;
	      end
	//632:  
   default:  lcd_en<=1'b0;
   endcase
end
else counter1<=0;
 end
endmodule