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1602课程作业

superdian

助工

2014-06-24 14:50:53 打赏

只看楼主 1楼

交一下1602课程的作业

这是实验现象：http://v.youku.com/v_show/id_XNzMwOTcyNDQw.html

实验中为了节省时间，将1S分频系数改小了，相当于视频中1602显示的一秒等于实际

一秒的千分之一。

/******************************************************************************
*Engineer: superdian
*Create Date: 2014/6/24
*Design Name: LCD1602Clock
*Module Name: LCD1602Clock
*Project Name: LCD1602Clock
*Target Devices: EP3CE5E144C8
*Tool versions:
*Description: LCD1602时钟
******************************************************************************/
module LCD1602(sys_clk,sys_rstn,lcd_rs,lcd_rw,lcd_en,lcd_data,shicounter);
//输入输出信号定义
input sys_clk;//系统时钟输入
input sys_rstn;//系统复位信号，低电平有效
output lcd_rs;//lcd的寄存器选择输出信号
output lcd_rw;//lcd的读、写操作选择输出信号
output lcd_en;//lcd使能信号
output [7:0] lcd_data;//lcd的数据总线（不进行读操作，故为输出）
output [4:0] shicounter;
/*******************************************************
寄存器定义
********************************************************/
//时间显示相关寄存器定义
reg [3:0] miao1;
reg [7:0] miao11;
reg [2:0] miao2;
reg [7:0] miao22;
reg [3:0] fen1;
reg [7:0] fen11;
reg [2:0] fen2;
reg [7:0] fen22;
reg [3:0] shi1;
reg [7:0] shi11;
reg [1:0] shi2;
reg [7:0] shi22;
reg [3:0] counter;
//1S分频相关寄存器定义
reg [24:0] delays_cnt;
reg clks_div;
//1602控制相关寄存器定义
reg lcd_rs;
reg clk_div;
reg [17:0] delay_cnt;
reg [7:0] lcd_data;
reg [4:0] char_cnt;
reg [7:0] data_disp;
reg [9:0] state;
parameter idle = 10'b000000000, //初始状态，下一个状态为CLEAR
clear = 10'b000000001, //清屏
set_function = 10'b000000010, //功能设置：8位数据接口/2行显示/5*8点阵字符
switch_mode = 10'b000000100, //显示开关控制：开显示，光标和闪烁关闭
set_mode = 10'b000001000, //输入方式设置：数据读写操作后，地址自动加一/画面不动
shift = 10'b000010000, //光标、画面位移设置：光标向左平移一个字符位（光标显示是关闭的，所以实际上设置是看不出效果的）
set_ddram1 = 10'b000100000, //设置DDRAM的地址：第一行起始为0x00（注意输出时DB7一定要为1）
set_ddram2 = 10'b001000000, //设置DDRAM的地址：第二行为0x40（注意输出时DB7一定要为1）
write_ram1 = 10'b010000000, //数据写入DDRAM相应的地址
write_ram2 = 10'b100000000; //数据写入DDRAM相应的地址

assign lcd_rw = 1'b0; //没有读操作，R/W信号始终为低电平
assign lcd_en = clk_div; //E信号出现高电平以及下降沿的时刻与LCD时钟相同
/*************************************************************
时钟分频50MS
*************************************************************/
always@(posedge sys_clk , negedge sys_rstn)
begin
if(!sys_rstn)
begin
delay_cnt<=18'd0;
clk_div<=1'b0;
end
else if(delay_cnt==18'd1000000)
begin
delay_cnt<=18'd0;
clk_div<=~clk_div;
end
else
begin
delay_cnt<=delay_cnt+1'b1;
clk_div<=clk_div;
end
end
/*************************************************************
时钟分频1S
*************************************************************/
always@(posedge sys_clk , negedge sys_rstn)
begin
if(!sys_rstn)
begin
delays_cnt<=25'd0;
clks_div<=1'b0;
end
else if(delays_cnt==25'd10000000)//1S分频系数
begin
delays_cnt<=25'd0;
clks_div<=~clks_div;
end
else
begin
delays_cnt<=delays_cnt+1'b1;
clks_div<=clks_div;
end
end
/**************************************************************
时间计数状态机
**************************************************************/
always@(posedge clks_div)
begin
if(counter==4'b1100)
begin
miao1<=4'h0;
miao2<=3'h0;
fen1<=4'h0;
shi1<=4'h0;
shi2<=2'h0;
counter<=4'h0;

end
else if(miao1==4'b1001)
begin
miao2<=miao2+1'd1;
miao1<=4'h0;
end
else if(miao2==3'b110)
begin
fen1<=fen1+1'd1;
miao2<=3'h0;
end
else if(fen1==4'b1001)
begin
fen2<=fen2+1'b1;
fen1<=4'h0;
end
else if(fen2==3'b110)
begin
shi1<=shi1+1;
fen2<=3'h0;
counter<=counter+1'b1;
end
else if(shi1==4'b1001)
begin
shi2<=shi2+1'b1;
shi1<=4'h0;
end
else
miao1=miao1+1'd1;
end

/************************************************************
1602状态机
************************************************************/
always@(posedge clk_div , negedge sys_rstn)
begin
if(!sys_rstn)
begin
state <= idle;
lcd_data <= 8'bzzzzzzzz;
char_cnt <= 5'd0;
end
else
begin
case(state)
idle: begin //初始状态
state <= clear;
lcd_data <= 8'bzzzzzzzz;
end
clear: begin //清屏
state <= set_function;
lcd_rs<=1'b0;
lcd_data <= 8'b00000001;
end
set_function: //功能设置(38H)：8位数据接口/2行显示/5*8点阵字符
begin
state <= switch_mode;
lcd_rs<=1'b0;
lcd_data <= 8'b00111000;
end
switch_mode: //显示开关控制(0CH)：开显示，光标和闪烁关闭
begin
state <= set_mode;
lcd_rs<=1'b0;
lcd_data <= 8'b00001100;
end
set_mode:begin //输入方式设置(06H)：数据读写操作后，地址自动加一/画面不动
state <= shift;
lcd_rs<=1'b0;
lcd_data <= 8'b00000110;
end
shift: begin //光标、画面位移设置(10H)：光标向左平移一个字符位（光标显示是关闭的，所以实际上设置是看不出效果的）
state <= set_ddram1;
lcd_rs<=1'b0;
lcd_data <= 8'b0001_0000;
end
set_ddram1: //设置DDRAM的地址：第一行起始为00H（注意输出时DB7一定要为1）
begin
state <= write_ram1;
lcd_rs<=1'b0;
lcd_data <= 8'b1000_0000;//Line1
end
set_ddram2: //设置DDRAM的地址：第二行为40H（注意输出时DB7一定要为1）
begin
state <= write_ram2;
lcd_rs<=1'b0;
lcd_data <= 8'b1100_0000;//Line2
end
write_ram1:
begin
if(char_cnt <=5'd14)
begin
char_cnt <= char_cnt + 1'b1;
lcd_rs<=1'b1;
lcd_data <= data_disp;
state <= write_ram1;
end
else
begin
state <= set_ddram2;
end
end
write_ram2:
begin
if(char_cnt <=5'd29)
begin
char_cnt <= char_cnt + 1'b1;
lcd_rs<=1'b1;
lcd_data <= data_disp;
state <= write_ram2;
end
else
begin
char_cnt <=5'd0;
state <= shift;
end
end
default: state <= idle;
endcase
end
end

//1602上下两行显示的字符
always @(char_cnt)
begin
case (char_cnt)
5'd0: data_disp = "E";
5'd1: data_disp = "E";
5'd2: data_disp = "P";
5'd3: data_disp = "W";
5'd4: data_disp = " ";
5'd5: data_disp = "S";
5'd6: data_disp = "U";
5'd7: data_disp = "P";
5'd8: data_disp = "E";
5'd9: data_disp = "R";
5'd10: data_disp = "D";
5'd11: data_disp = "I";
5'd12: data_disp = "A";
5'd13: data_disp = "N";
5'd14: data_disp = " ";
5'd15: data_disp = "C";
5'd16: data_disp = "l";
5'd17: data_disp = "o";
5'd18: data_disp = "c";
5'd19: data_disp = "k";
5'd20: data_disp = ":";
5'd21: data_disp = shi22;
5'd22: data_disp = shi11;
5'd23: data_disp = ":";
5'd24: data_disp = fen22;
5'd25: data_disp = fen11;
5'd26: data_disp = ":";
5'd27: data_disp = miao22;
5'd28: data_disp = miao11;
5'd29: data_disp = " ";
default : data_disp ="";
endcase
end

/***************************************************************
时间计数数值译码：时间计数状态机运行时，要将秒的个位十位显示出来，
必须用ASCII码表示这两位的数值。分钟，小时的显示也相同。
****************************************************************/
always @(miao1)
begin
case (miao1)
4'd0: miao11 = "0";
4'd1: miao11 = "1";
4'd2: miao11 = "2";
4'd3: miao11 = "3";
4'd4: miao11 = "4";
4'd5: miao11 = "5";
4'd6: miao11 = "6";
4'd7: miao11 = "7";
4'd8: miao11 = "8";
4'd9: miao11 = "9";
default : miao11 ="0";
endcase
end

always @(miao2)
begin
case (miao2)
3'd0: miao22 = "0";
3'd1: miao22 = "1";
3'd2: miao22 = "2";
3'd3: miao22 = "3";
3'd4: miao22 = "4";
3'd5: miao22 = "5";
default : miao22 ="0";
endcase
end

always @(fen1)
begin
case (fen1)
4'd0: fen11 = "0";
4'd1: fen11 = "1";
4'd2: fen11 = "2";
4'd3: fen11 = "3";
4'd4: fen11 = "4";
4'd5: fen11 = "5";
4'd6: fen11 = "6";
4'd7: fen11 = "7";
4'd8: fen11 = "8";
4'd9: fen11 = "9";

default : fen11 ="0";
endcase
end

always @(fen2)
begin
case (fen2)
3'd0: fen22 = "0";
3'd1: fen22 = "1";
3'd2: fen22 = "2";
3'd3: fen22 = "3";
3'd4: fen22 = "4";
3'd5: fen22 = "5";
default : fen22 ="0";
endcase
end

always @(shi1)
begin
case (shi1)
4'd0: shi11 = "0";
4'd1: shi11 = "1";
4'd2: shi11 = "2";
4'd3: shi11 = "3";
4'd4: shi11 = "4";
4'd5: shi11 = "5";
4'd6: shi11 = "6";
4'd7: shi11 = "7";
4'd8: shi11 = "8";
4'd9: shi11 = "9";

default : shi11 ="0";
endcase
end

always @(shi2)
begin
case (shi2)
2'd0: shi22 = "0";
2'd1: shi22 = "1";
default : shi22 ="0";
endcase
end
endmodule

关键词：作业

superdian

助工

2014-06-24 15:00:22 打赏

2楼

发到帖子上位置就变了

，笔记本屏小截图也不方便，原来还是挺整齐的，将就一下吧，下次想办法避免。原来的

CharlesWang1

助工

2014-06-24 20:11:56 打赏

3楼

发贴里面有个插入程序代码，你在这里插入代码就不会乱了

CharlesWang1

助工

2014-06-24 20:12:59 打赏

4楼

每次你都是第一个交作业啊，厉害，我每次都只有晚上有时间敲代码。。。。。。

superdian

助工

2014-06-24 20:14:23 打赏

5楼

您大概工作了吧，我在上学，时间多。

CharlesWang1

助工

2014-06-24 20:16:03 打赏

6楼

嗯嗯,工作了,只是还是喜欢做FPGA,刚好论坛有培训,就过来学习了

superdian

助工

2014-06-24 20:17:48 打赏

7楼

/******************************************************************************
*Engineer: superdian   
*Create Date:   2014/6/24
*Design Name:   LCD1602Clock
*Module Name:   LCD1602Clock
*Project Name:  LCD1602Clock
*Target Devices: EP3CE5E144C8
*Tool versions: 
*Description: LCD1602时钟
******************************************************************************/
module LCD1602(sys_clk,sys_rstn,lcd_rs,lcd_rw,lcd_en,lcd_data,shicounter);
//输入输出信号定义
input          sys_clk;//系统时钟输入
input          sys_rstn;//系统复位信号，低电平有效
output         lcd_rs;//lcd的寄存器选择输出信号
output         lcd_rw;//lcd的读、写操作选择输出信号
output         lcd_en;//lcd使能信号
output  [7:0]  lcd_data;//lcd的数据总线（不进行读操作，故为输出）
output  [4:0]  shicounter;
/*******************************************************
寄存器定义
********************************************************/
//时间显示相关寄存器定义
reg    [3:0]   miao1;
reg    [7:0]   miao11;
reg    [2:0]   miao2;
reg    [7:0]   miao22;
reg    [3:0]   fen1;
reg    [7:0]   fen11;
reg    [2:0]   fen2;
reg    [7:0]   fen22;
reg    [3:0]   shi1;
reg    [7:0]   shi11;
reg    [1:0]   shi2;
reg    [7:0]   shi22;
reg    [3:0]   counter;
//1S分频相关寄存器定义
reg    [24:0]  delays_cnt;
reg             clks_div; 
//1602控制相关寄存器定义
reg            lcd_rs;
reg            clk_div;
reg     [17:0] delay_cnt;
reg     [7:0]  lcd_data;
reg     [4:0]  char_cnt;		
reg     [7:0]  data_disp;
reg     [9:0]  state;   
parameter	   idle 		= 10'b000000000,	//初始状态，下一个状态为CLEAR
			   clear		= 10'b000000001, 	//清屏
			   set_function	= 10'b000000010, 	//功能设置：8位数据接口/2行显示/5*8点阵字符
			   switch_mode	= 10'b000000100, 	//显示开关控制：开显示，光标和闪烁关闭
			   set_mode     = 10'b000001000, 	//输入方式设置：数据读写操作后，地址自动加一/画面不动
			   shift  		= 10'b000010000, 	//光标、画面位移设置：光标向左平移一个字符位（光标显示是关闭的，所以实际上设置是看不出效果的）
			   set_ddram1   = 10'b000100000, 	//设置DDRAM的地址：第一行起始为0x00（注意输出时DB7一定要为1）
			   set_ddram2   = 10'b001000000, 	//设置DDRAM的地址：第二行为0x40（注意输出时DB7一定要为1）
			   write_ram1   = 10'b010000000, 	//数据写入DDRAM相应的地址
			   write_ram2   = 10'b100000000; 	//数据写入DDRAM相应的地址

assign lcd_rw = 1'b0;						//没有读操作，R/W信号始终为低电平
assign lcd_en = clk_div;	//E信号出现高电平以及下降沿的时刻与LCD时钟相同
/*************************************************************
时钟分频50MS
*************************************************************/
always@(posedge sys_clk , negedge sys_rstn)
begin 
	if(!sys_rstn)
		begin
			delay_cnt<=18'd0;
			clk_div<=1'b0;
		end
	else if(delay_cnt==18'd1000000)
		begin
			delay_cnt<=18'd0;
			clk_div<=~clk_div;
		end
	else
		begin
			delay_cnt<=delay_cnt+1'b1;
			clk_div<=clk_div;
		end
end
/*************************************************************
时钟分频1S
*************************************************************/
always@(posedge sys_clk , negedge sys_rstn)
begin 
	if(!sys_rstn)
		begin
			delays_cnt<=25'd0;
			clks_div<=1'b0;			
		end
	else if(delays_cnt==25'd10000000) 
		begin
			delays_cnt<=25'd0;
			clks_div<=~clks_div;			
		end
	else
		begin
			delays_cnt<=delays_cnt+1'b1;
			clks_div<=clks_div;			
		end
end
/**************************************************************
时间计数状态机
**************************************************************/
always@(posedge clks_div)
begin
   if(counter==4'b1100)
       begin
  miao1<=4'h0;
  miao2<=3'h0;
  fen1<=4'h0;
  shi1<=4'h0;
  shi2<=2'h0;
  counter<=4'h0;
  
  end
          else if(miao1==4'b1001)
                begin
                    miao2<=miao2+1'd1;
                    miao1<=4'h0;
                end
          else if(miao2==3'b110)
                begin
                    fen1<=fen1+1'd1;
                    miao2<=3'h0;
                end
          else if(fen1==4'b1001)
                begin
                    fen2<=fen2+1'b1;
                    fen1<=4'h0;
                end
          else  if(fen2==3'b110)
                begin
                    shi1<=shi1+1;
                    fen2<=3'h0;
                    counter<=counter+1'b1;
                end 
          else  if(shi1==4'b1001)
                begin
                    shi2<=shi2+1'b1;
                    shi1<=4'h0; 
                end
   else       
   miao1=miao1+1'd1;
end

/************************************************************
1602状态机
************************************************************/
always@(posedge clk_div , negedge sys_rstn)	 
begin
	if(!sys_rstn)
		begin
			state 	 <= idle;
			lcd_data <= 8'bzzzzzzzz;
			char_cnt <= 5'd0;			
		end
	else
		begin
		case(state)
		idle:	begin						//初始状态
					state <= clear;
					lcd_data <= 8'bzzzzzzzz;
				end
		clear:	begin						//清屏
					state <= set_function;
					lcd_rs<=1'b0;
					lcd_data <= 8'b00000001;			
				end		
		set_function:						//功能设置(38H)：8位数据接口/2行显示/5*8点阵字符
				begin
					state <= switch_mode;
					lcd_rs<=1'b0;
					lcd_data <= 8'b00111000;				
				end
		switch_mode:							//显示开关控制(0CH)：开显示，光标和闪烁关闭
				begin
					state <= set_mode;
					lcd_rs<=1'b0;
					lcd_data <= 8'b00001100;
				end	
		set_mode:begin						//输入方式设置(06H)：数据读写操作后，地址自动加一/画面不动
					state <= shift;	
					lcd_rs<=1'b0;
					lcd_data <= 8'b00000110;
				end
		shift:	begin						//光标、画面位移设置(10H)：光标向左平移一个字符位（光标显示是关闭的，所以实际上设置是看不出效果的）
					state <= set_ddram1;
					lcd_rs<=1'b0;
					lcd_data <= 8'b0001_0000;			
				end		
		set_ddram1:						    //设置DDRAM的地址：第一行起始为00H（注意输出时DB7一定要为1）	
				begin
					state <= write_ram1; 
					lcd_rs<=1'b0;
					lcd_data <= 8'b1000_0000;//Line1
				end
		set_ddram2:							//设置DDRAM的地址：第二行为40H（注意输出时DB7一定要为1）
				begin
					state <= write_ram2;
					lcd_rs<=1'b0;
					lcd_data <= 8'b1100_0000;//Line2		
				end
		write_ram1:				
				begin									
					if(char_cnt <=5'd14)
						begin
							char_cnt <= char_cnt + 1'b1; 
							lcd_rs<=1'b1;
							lcd_data <= data_disp;
							state <= write_ram1;
						end
					else
						begin
							state <= set_ddram2;	
						end				
				end
		write_ram2:				
				begin									
					if(char_cnt <=5'd29)
						begin
							char_cnt <= char_cnt + 1'b1; 
							lcd_rs<=1'b1;
							lcd_data <= data_disp;
							state <= write_ram2;
						end
					else
						begin
							char_cnt <=5'd0;
							state <= shift;	
						end				
				end
		default: 	state <= idle;
		endcase
		end
end

//1602上下两行显示的字符
always @(char_cnt)			
begin
	case (char_cnt)
	5'd0: data_disp  = "E";	
	5'd1: data_disp  = "E";	
	5'd2: data_disp  = "P";	
	5'd3: data_disp  = "W";	
	5'd4: data_disp  = " ";	
	5'd5: data_disp  = "S";	
	5'd6: data_disp  = "U";	
	5'd7: data_disp  = "P";	
	5'd8: data_disp  = "E";	
	5'd9: data_disp  = "R";	
	5'd10: data_disp = "D";	
	5'd11: data_disp = "I";	
	5'd12: data_disp = "A";	
	5'd13: data_disp = "N";	
	5'd14: data_disp = " ";	
	5'd15: data_disp = "C";	
	5'd16: data_disp = "l";	
	5'd17: data_disp = "o";	
	5'd18: data_disp = "c";	
	5'd19: data_disp = "k";	
	5'd20: data_disp = ":";	
	5'd21: data_disp = shi22;	
	5'd22: data_disp = shi11;	
	5'd23: data_disp = ":";	
	5'd24: data_disp = fen22;
	5'd25: data_disp = fen11;
	5'd26: data_disp = ":";
	5'd27: data_disp = miao22;
	5'd28: data_disp = miao11;
	5'd29: data_disp = " ";
    default :   data_disp ="";	
	endcase
end

/***************************************************************
时间计数数值译码：时间计数状态机运行时，要将秒的个位十位显示出来，
必须用ASCII码表示这两位的数值。分钟，小时的显示也相同。
****************************************************************/
always @(miao1)			
begin
	case (miao1)
	4'd0: miao11 = "0";
    4'd1: miao11 = "1";
    4'd2: miao11 = "2";
    4'd3: miao11 = "3";
    4'd4: miao11 = "4";		
    4'd5: miao11 = "5";
    4'd6: miao11 = "6";
    4'd7: miao11 = "7";
    4'd8: miao11 = "8";
    4'd9: miao11 = "9";
    default :   miao11 ="0";
	endcase
end

always @(miao2)			
begin
	case (miao2)
	3'd0: miao22 = "0";
    3'd1: miao22 = "1";
    3'd2: miao22 = "2";
    3'd3: miao22 = "3";
    3'd4: miao22 = "4";		
    3'd5: miao22 = "5";
    default :   miao22 ="0";
	endcase
end

always @(fen1)			
begin
	case (fen1)
	4'd0: fen11 = "0";
    4'd1: fen11 = "1";
    4'd2: fen11 = "2";
    4'd3: fen11 = "3";
    4'd4: fen11 = "4";		
    4'd5: fen11 = "5";
    4'd6: fen11 = "6";
    4'd7: fen11 = "7";		
    4'd8: fen11 = "8";
    4'd9: fen11 = "9";
    
    default :   fen11 ="0";
	endcase
end

always @(fen2)			
begin
	case (fen2)
	3'd0: fen22 = "0";
    3'd1: fen22 = "1";
    3'd2: fen22 = "2";
    3'd3: fen22 = "3";
    3'd4: fen22 = "4";		
    3'd5: fen22 = "5";
    default :   fen22 ="0";
	endcase
end

always @(shi1)			
begin
	case (shi1)
	4'd0: shi11 = "0";
    4'd1: shi11 = "1";
    4'd2: shi11 = "2";
    4'd3: shi11 = "3";
    4'd4: shi11 = "4";		
    4'd5: shi11 = "5";
    4'd6: shi11 = "6";
    4'd7: shi11 = "7";		
    4'd8: shi11 = "8";
    4'd9: shi11 = "9";
    
    default :   shi11 ="0";
	endcase
end

always @(shi2)			
begin
	case (shi2)
	2'd0: shi22 = "0";
    2'd1: shi22 = "1";
    default :   shi22 ="0";
	endcase
end
endmodule

superdian

助工

2014-06-24 20:19:11 打赏

8楼

效果真好.谢谢提醒！

51FPGA

高工

2014-06-24 20:36:12 打赏

9楼

完成的不错，加油哦

superdian

助工

2014-06-25 22:24:22 打赏

10楼

版主，在时间计数的状态机中，我目前只描述了时间计时到12小时清零。如何描述使其同时具有接受sys_rstn复位信号清零的功能？请指教

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