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在电赛训练板上实现DDS的功能

关于用FPGA实现DDS的过程可以参考文档：DDS生成任意波形的方法及Verilog代码实例

基于小脚丫FPGA核心板的电赛训练板

1. 顶层模块

FPGA片内逻辑的结构框图如上图所示，FPGA片上实现的逻辑包括：

调用内部锁相环由输入的12M时钟得到120MHZ工作时钟，驱动DDS控制模块，输出作为DAC的转换时钟。
处理旋转编码器的输入。判断旋转编码器的转动和按下，顺时针转动对应信号频率的增加，逆时针转动对应信号频率的减小，按下对应波形的切换。
存储正弦波的波形数据。
实现的波形包括正弦波、三角波、方波、锯齿波四种波形，波形频率范围为100kHZ到10MHZ。
通过spi总线驱动OLED屏幕指示当前的波形和频率。

代码如下：

module top(clk_in,sys_rst_n,key_a,key_b,key_ok,dac_data,dac_clk,oled_rst,oled_dcn,oled_clk,oled_dat);
input			clk_in,sys_rst_n,key_a,key_b,key_ok;
//input	[3:0]	sw;
output	[9:0]	dac_data;
output  		dac_clk;
output			oled_rst;		
output			oled_dcn;	
output			oled_clk;	
output			oled_dat;
 
wire			L_pulse,R_pulse,O_pulse;
wire			clk120,clk60,clk96;
 
wire	locked;
wire	rst_n;
 
assign	led=8'hff;
assign	rgbled=6'b111111;
 
wire	[1:0]	wave;
wire	[26:0]  WaveFreq;
 
OLED12864	OLED12864_u1 (
			.clk     (clk_in) ,		
			.rst_n   (rst_n),		
 
			//.sw      (cnt_seg),		
			.wave	(wave),
			//.oled_csn(oled_csn),		
			.WaveFreq(WaveFreq),
			.oled_rst(oled_rst),			
			.oled_dcn(oled_dcn),	
			.oled_clk(oled_clk),	
			.oled_dat(oled_dat)		
);
 
assign			dac_clk=clk120;
 
dds dds_u(
	.clk_in	 (clk120)	,
	.rst_n	 (rst_n)	,
	.O_pulse (O_pulse)	,
	.L_pulse (L_pulse)	,
	.R_pulse (R_pulse)	,
	.dac_data(dac_data) ,
	.wave	 (wave),
	.WaveFreq(WaveFreq)
	);//
 
assign	rst_n=sys_rst_n&locked;	
pll1	pll1_inst (
	.areset ( ~sys_rst_n ),
	.inclk0 ( clk_in ),
	.c0 ( clk120 ),
	.locked ( locked )
	);			
 
Encoder		Encoder_u(
		.clk_in		(clk120),			
		.rst_n_in	(rst_n),		
		.key_a		(key_a),			
		.key_b		(key_b),			
		.key_ok		(key_ok),			
		.Left_pulse	(L_pulse),		
		.Right_pulse(R_pulse),	
		.OK_pulse	(O_pulse)	
);
 
endmodule

2. DDS核心模块

DDS控制模块是信号发生器设计的核心，利用Verilog实现DDS的结构框图如下图所示。

从图中可以看出，DDS控制模块根据旋转编码器模块的输入信号调节频率控制字、切换波形，输出一定频率的方波、三角波、锯齿波或正弦波数据至DAC。同时，DDS控制模块还会将当前波形信息和频率信息输出给OLED模块用于显示。四种波形的产生使用同一个相位累加寄存器，如下图所示，相位累加寄存器本质上是一个不断累加的计数器，单次累加的幅度是频率控制字，频率控制字由旋转编码器调节，当旋转编码器顺时针转动时增大频率控制字，当旋转编码器逆时针转动时减小频率控制字。接下来分别介绍四种波形的原理。

方波 - 取相位累加寄存器的最高位作为判断条件，当最高位为逻辑1，则对DAC的输入赋值10’h3ff；当最高位为逻辑0，则则对DAC的输入赋值10’h000，从而实现了方波波形。
锯齿波 - 取相位累加寄存器的高十位直接作为DAC的输入，随着相位累加寄存器不断累加，DAC的输入也周期性地以锯齿波形状循环。
三角波 - 取相位累加寄存器的最高位作为判断条件，当最高位为逻辑1，则将相位累加寄存器的13到22位直接作为DAC数据的输入；当最高位为逻辑0，则将相位累加寄存器的13到22位取反后作为DAC数据的输入。
正弦波 - 与其它三种波形不同，正弦波不能直接用取相位累加寄存器作为DAC的输入，需要将相位累加寄存器的高8位作为正弦波表的地址输入，这样的话，就实现了在一个周期内以一定间隔读出正弦波表内的数据作为DAC的输入。

下面是DDS的主代码，可以选择输出的波形以及相应的频率

// --------------------------------------------------------------------
// >>>>>>>>>>>>>>>>>>>>>>>>> COPYRIGHT NOTICE <<<<<<<<<<<<<<<<<<<<<<<<<
// --------------------------------------------------------------------
// Module: dds
// 
// Author: Step
// 
// Description: dds
// 
// Web: www.stepfapga.com
// 
// --------------------------------------------------------------------
// Code Revision History :
// --------------------------------------------------------------------
// Version: |Mod. Date:   |Changes Made:
// V1.0     |2021.11.27   |Initial ver
// --------------------------------------------------------------------
module dds(clk_in,rst_n,O_pulse,L_pulse,R_pulse,dac_data,wave,WaveFreq);//
 
localparam  SIN = 2'b00, SAW = 2'b01, TRI = 2'b10, SQU = 2'b11;
input 			clk_in;                 // 小脚丫FPGA的外部时钟频率为12MHz
input			rst_n;
input	wire 	O_pulse,L_pulse,R_pulse;
 
output reg	[9:0] 	dac_data;        // 10位数据输出送给外部的DAC
output reg 	[1:0] 	wave;
output reg	[26:0]  WaveFreq;
 
reg 	[23:0] 	phase_acc;            //增加相位累加器位数使得分辨率提高
wire	[23:0]	phase;
reg 	[23:0]	f_inc;
 
assign phase=phase_acc;
 
always @(posedge clk_in) 	phase_acc <= phase_acc + f_inc;		//f_inc=24'd27962;主时钟为12MHz，则产生20KHz的正弦波信号  
 
wire [9:0] sin_dat; //正弦波
wire [9:0] saw_dat = phase[23:14];  //锯齿波
wire [9:0] tri_dat = phase[23]? (~phase[22:13]) : phase[22:13]; //三角波
wire [9:0] squ_dat = phase[23]? 10'h3ff : 10'h000;  //方波 
 
always @(*) begin
    case(wave)
        2'b00: dac_data = sin_dat;   //正弦波       
		2'b01: dac_data = saw_dat;   //锯齿波       
		2'b10: dac_data = tri_dat;   //三角波       
		2'b11: dac_data = squ_dat;   //方波
        default: dac_data = sin_dat; //正弦波   
	endcase
end
 
lookup_tables u_lookup_tables(.phase(phase_acc[23:16]), .sin_out(sin_dat)); 
 
//波形输出选择
always @(posedge clk_in or negedge rst_n) begin
    if(!rst_n) wave <= SIN;
    else if(O_pulse)begin
        case(wave)
            SIN: wave <= SAW;
            SAW: wave <= TRI;
            TRI: wave <= SQU;
            SQU: wave <= SIN;
            default: wave <= SIN;
        endcase
    end else wave <= wave;
end
//频率控制
always@(posedge clk_in or negedge rst_n) begin
    if(!rst_n) begin
		f_inc <= 24'h22222;
		WaveFreq<=1_000_000;
	end 
    else if(L_pulse==1'b1) begin
        if(f_inc <= 24'h369d) f_inc <= f_inc;
        else begin
			f_inc <= f_inc - 24'h369d;
			WaveFreq<=WaveFreq-100000;
		end 
    end 
	else if(R_pulse==1'b1) begin
        if(f_inc >= 24'h155554) f_inc <= f_inc;
        else begin
			f_inc <= f_inc + 24'h369d;
			WaveFreq<=WaveFreq+100000;
		end 
    end 
	else f_inc <= f_inc;
end
endmodule
//dds时钟频率给定后，输出信号的频率取决于频率控制字，
//	频率分辨率取决于累加器位数，
//	相位分辨率取决于ROM的地址线位数，
//	幅度量化噪声取决于ROM的数据位字长和D/A转换器位数

查找表的程序，主要是利用了正弦波的对称性，为了节省FPGA的资源，可以只构建一个象限的波形，另外3个象限可以基于其对称性通过逻辑来实现。

/* lookup_tables.v */
 
module lookup_tables(phase, sin_out);
input  	[7:0] 	phase;
output 	[9:0] 	sin_out;
 
wire     [9:0]   sin_out;
 
reg   	[5:0] 	address;
wire   	[1:0] 	sel;
wire   	[8:0] 	sine_table_out;
 
reg     [9:0]   sine_onecycle_amp;
 
//assign sin_out = {4'b0, sine_onecycle_amp[9:4]} + 9'hff;  // 可以调节输出信号的幅度
assign sin_out = sine_onecycle_amp[9:0];
 
assign sel = phase[7:6];
 
sin_table u_sin_table(address,sine_table_out);
 
always @(sel or sine_table_out)
begin
	case(sel)
	2'b00: 	begin
			sine_onecycle_amp = 9'h1ff + sine_table_out[8:0];
			address = phase[5:0];
	     	end
  	2'b01: 	begin
			sine_onecycle_amp = 9'h1ff + sine_table_out[8:0];
			address = ~phase[5:0];
	     	end
  	2'b10: 	begin
			sine_onecycle_amp = 9'h1ff - sine_table_out[8:0];
			address = phase[5:0];
     		end
  	2'b11: 	begin
			sine_onecycle_amp = 9'h1ff - sine_table_out[8:0];
			address = ~ phase[5:0];
     		end
	endcase
end
 
endmodule

构建正弦波表的程序，Lattice的Diamond以及Inel的Quartus编译工具中都有相应的IP可以直接调用使用。

module sin_table(address,sin);
output [8:0] sin;
input  [5:0] address;
 
reg    [8:0] sin;
 
always @(address)
	begin
                  case(address)	
                      6'h0: sin=9'h0;
                      6'h1: sin=9'hC;
                      6'h2: sin=9'h19;
                      6'h3: sin=9'h25;
                      6'h4: sin=9'h32;
                      6'h5: sin=9'h3E;
                      6'h6: sin=9'h4B;
                      6'h7: sin=9'h57;
                      6'h8: sin=9'h63;
                      6'h9: sin=9'h70;
                      6'ha: sin=9'h7C;
                      6'hb: sin=9'h88;
                      6'hc: sin=9'h94;
                      6'hd: sin=9'hA0;
                      6'he: sin=9'hAC;
                      6'hf: sin=9'hB8;
                      6'h10: sin=9'hC3;
                      6'h11: sin=9'hCF;
                      6'h12: sin=9'hDA;
                      6'h13: sin=9'hE6;
                      6'h14: sin=9'hF1;
                      6'h15: sin=9'hFC;
                      6'h16: sin=9'h107;
                      6'h17: sin=9'h111;
                      6'h18: sin=9'h11C;
                      6'h19: sin=9'h126;
                      6'h1a: sin=9'h130;
                      6'h1b: sin=9'h13A;
                      6'h1c: sin=9'h144;
                      6'h1d: sin=9'h14E;
                      6'h1e: sin=9'h157;
                      6'h1f: sin=9'h161;
                      6'h20: sin=9'h16A;
                      6'h21: sin=9'h172;
                      6'h22: sin=9'h17B;
                      6'h23: sin=9'h183;
                      6'h24: sin=9'h18B;
                      6'h25: sin=9'h193;
                      6'h26: sin=9'h19B;
                      6'h27: sin=9'h1A2;
                      6'h28: sin=9'h1A9;
                      6'h29: sin=9'h1B0;
                      6'h2a: sin=9'h1B7;
                      6'h2b: sin=9'h1BD;
                      6'h2c: sin=9'h1C3;
                      6'h2d: sin=9'h1C9;
                      6'h2e: sin=9'h1CE;
                      6'h2f: sin=9'h1D4;
                      6'h30: sin=9'h1D9;
                      6'h31: sin=9'h1DD;
                      6'h32: sin=9'h1E2;
                      6'h33: sin=9'h1E6;
                      6'h34: sin=9'h1E9;
                      6'h35: sin=9'h1ED;
                      6'h36: sin=9'h1F0;
                      6'h37: sin=9'h1F3;
                      6'h38: sin=9'h1F6;
                      6'h39: sin=9'h1F8;
                      6'h3a: sin=9'h1FA;
                      6'h3b: sin=9'h1FC;
                      6'h3c: sin=9'h1FD;
                      6'h3d: sin=9'h1FE;
                      6'h3e: sin=9'h1FF;
                      6'h3f: sin=9'h1FF;
                   endcase
              end
endmodule

3. 编码器输入模块

// --------------------------------------------------------------------
// >>>>>>>>>>>>>>>>>>>>>>>>> COPYRIGHT NOTICE <<<<<<<<<<<<<<<<<<<<<<<<<
// --------------------------------------------------------------------
// Module: Encoder
// 
// Author: Step
// 
// Description: Driver for rotary encoder
// 
// Web: www.stepfapga.com
// 
// --------------------------------------------------------------------
// Code Revision History :
// --------------------------------------------------------------------
// Version: |Mod. Date:   |Changes Made:
// V1.0     |2021.11.27   |Initial ver
// --------------------------------------------------------------------
module Encoder
(
input					clk_in,			//系统时钟
input					rst_n_in,		//系统复位，低有效
input	wire			key_a,			
input	wire			key_b,			
input	wire			key_ok,			
output	reg				Left_pulse,		//左旋转脉冲输出
output	reg				Right_pulse,	//右旋转脉冲输出
output					OK_pulse		//按动脉冲输出
);
 
localparam				NUM_500US	=	6_0000;	
 
reg				[15:0]	cnt;
//计数器周期为500us，控制键值采样频率
always@(posedge clk_in or negedge rst_n_in) begin
	if(!rst_n_in) cnt <= 0;
	else if(cnt >= NUM_500US-1) cnt <= 1'b0;
	else cnt <= cnt + 1'b1;
end
 
reg				[5:0]	cnt_20ms;
reg						key_a_r,key_a_r1;
reg						key_b_r,key_b_r1;
reg						key_ok_r;
 
//针对A、B、D管脚分别做简单去抖操作，
//如果对旋转编码器的要求比较高，建议现对旋转编码器的输出做严格的消抖处理后再来做旋转编码器的驱动
//对旋转编码器的输入缓存，消除亚稳态同时延时锁存
always@(posedge clk_in or negedge rst_n_in) begin
	if(!rst_n_in) begin
		key_a_r		<=	1'b1;
		key_a_r1	<=	1'b1;
		key_b_r		<=	1'b1;
		key_b_r1	<=	1'b1;
		cnt_20ms	<=	1'b1;
		key_ok_r	<=	1'b1;
	end else if(cnt == NUM_500US-1) begin
		key_a_r		<=	key_a;
		key_a_r1	<=	key_a_r;
		key_b_r		<=	key_b;
		key_b_r1	<=	key_b_r;
		if(cnt_20ms >= 6'd40) begin	//对于按键D信号还是采用20ms周期采样的方法，40*500us = 20ms
			cnt_20ms <= 6'd0;
			key_ok_r <= key_ok;
		end else begin 
			cnt_20ms <= cnt_20ms + 1'b1;
			key_ok_r <=	key_ok_r;
		end
	end
end
 
reg						key_ok_r1;
//对按键D信号进行延时锁存
always@(posedge clk_in or negedge rst_n_in) begin
	if(!rst_n_in) key_ok_r1 <= 1'b1;
	else key_ok_r1 <= key_ok_r;
end
 
wire	A_state		= key_a_r1 && key_a_r && key_a;	//旋转编码器A信号高电平状态检测
wire	B_state		= key_b_r1 && key_b_r && key_b;	//旋转编码器B信号高电平状态检测
assign	OK_pulse	= key_ok_r1 && (!key_ok_r);		//旋转编码器D信号下降沿检测
 
reg						A_state_reg;
//延时锁存
always@(posedge clk_in or negedge rst_n_in) begin
	if(!rst_n_in) A_state_reg <= 1'b1;
	else A_state_reg <= A_state;
end
 
//旋转编码器A信号的上升沿和下降沿检测
wire	A_pos	= (!A_state_reg) && A_state;
wire	A_neg	= A_state_reg && (!A_state);
 
//通过旋转编码器A信号的边沿和B信号的电平状态的组合判断旋转编码器的操作，并输出对应的脉冲信号
always@(posedge clk_in or negedge rst_n_in)begin
	if(!rst_n_in)begin
		Right_pulse <= 1'b0;
		Left_pulse <= 1'b0;
	end else begin
		if(A_pos && B_state) Left_pulse <= 1'b1;	
		else if(A_neg && B_state) Right_pulse <= 1'b1;
		else begin
			Right_pulse <= 1'b0;
			Left_pulse <= 1'b0;
		end
	end
end
 
endmodule

4. 将频率值转换为OLED显示器上的字符

module getChar3 (
    input                   clk,
    input                   rst_n,
    input   [31:0]          WaveFreq,
    output  reg[(8*16-1):0]    char
);
 
reg	[31:0]  t_bin;
reg	[3:0]   bcd8,bcd7,bcd6,bcd5,bcd4,bcd3,bcd2,bcd1;
 
reg [3:0] state;
 
always@(posedge clk or negedge rst_n)
begin
	if(!rst_n) begin
		t_bin<=WaveFreq;
        char<= 0;
		bcd8<= 0;
		bcd7<= 0;
		bcd6<= 0;
		bcd5<= 0;
		bcd4<= 0;
		bcd3<= 0;
		bcd2<= 0;
		bcd1<= 0;
        state<=0;
	end
	else begin
        case (state)
            0: begin
                t_bin<=WaveFreq;
                state<=state+1;
            end
            1: begin
                if($signed(t_bin)-$signed(10000000)>=0)begin
                    bcd8<=bcd8+1;
                    t_bin<=t_bin-10000000;
                end
                else begin
                    state<=state+1;
                end
            end
            2: begin
                if($signed(t_bin)-$signed(1000000)>=0)begin
                    bcd7<=bcd7+1;
                    t_bin<=t_bin-1000000;
                end
                else begin
                    state<=state+1;
                end
            end
            3: begin
                if($signed(t_bin)-$signed(100000)>=0)begin
                    bcd6<=bcd6+1;
                    t_bin<=t_bin-100000;
                end
                else begin
                    state<=state+1;
                end
            end
            4: begin
                if($signed(t_bin)-$signed(10000)>=0)begin
                    bcd5<=bcd5+1;
                    t_bin<=t_bin-10000;
                end
                else begin
                    state<=state+1;
                end
            end
            5: begin
                if($signed(t_bin)-$signed(1000)>=0)begin
                    bcd4<=bcd4+1;
                    t_bin<=t_bin-1000;
                end
                else begin
                    state<=state+1;
                end
            end
            6: begin
                if($signed(t_bin)-$signed(100)>=0)begin
                    bcd3<=bcd3+1;
                    t_bin<=t_bin-100;
                end
                else begin
                    state<=state+1;
                end
            end
            7: begin
                if($signed(t_bin)-$signed(10)>=0)begin
                    bcd2<=bcd2+1;
                    t_bin<=t_bin-10;
                end
                else begin
                    state<=state+1;
                end
            end
            8: begin
                if($signed(t_bin)-$signed(1)>=0)begin
                    bcd1<=bcd1+1;
                    t_bin<=t_bin-1;
                end
                else begin
                    state<=state+1;
                end
            end
            9:begin
                t_bin<=WaveFreq;
                char<={"  ",4'h0,bcd8,4'h0,bcd7,"_",
                4'h0,bcd6,4'h0,bcd5,4'h0,bcd4,"_",
                4'h0,bcd3,4'h0,bcd2,4'h0,bcd1,"Hz  "};
                bcd8<= 0;
                bcd7<= 0;
                bcd6<= 0;
                bcd5<= 0;
                bcd4<= 0;
                bcd3<= 0;
                bcd2<= 0;
                bcd1<= 0;
                state<=0;
            end
            default: begin
                t_bin<=WaveFreq;
                bcd7<= 0;
                bcd6<= 0;
                bcd5<= 0;
                bcd4<= 0;
                bcd3<= 0;
                bcd2<= 0;
                bcd1<= 0;
                state<=0;
            end
        endcase	
	end
end
 
endmodule

5. OLED显示模块

这是通过SPI总线方式来驱动128*64分辨率的OLED显示屏显示相应信息的逻辑代码

该模块的输入包括时钟、复位、输入变量，输出是驱动ssd1306的的五根总线：包括spi的三条总线、一条ssd1306复位线、一条ssd1306数据指令选择线。该模块通过SPI总线完成OLED屏幕的显示，能够显示字符和汉字。该模块中，利用查找表实现字符、汉字模的存储，利用一个一段式状态机实现：初始化配置SSD1306驱动芯片、在屏幕上显示指定的信息。其中，IDLE状态作为初始状态完成所有寄存器变量的初始化；MAIN状态作为总调度实现了整个OLED模块的流程调度，如果想要使用本模块，只需要在本状态进行修改；INIT状态通过调用WRITE状态将23条SSD1306的配置指令通过SPI时序发出，完成SSD1306的配置；SCAN状态通过调用WRITE状态完成字符的显示；CHINESE状态通过调用WRITE状态完成汉字的显示；WRITE状态作为底层状态，完成SPI的传输过程；DELAY状态的功能是延时。本模块的使用通过在MAIN状态里进行添加相应的逻辑来实现，如果显示汉字则需要在汉字字模中添加相应的字模信息。如果想要实时刷新信息，需要将动态显示的信息通过本module的输入端口sw传入模块本在MAIN状态里进行调用，也可自行添加输入端口变量。

// --------------------------------------------------------------------
// Module: OLED12864 
// Description: OLED12864_Driver
// --------------------------------------------------------------------
module OLED12864
(
	input				clk,		//12MHz绯荤粺鏃堕挓
	input				rst_n,		//绯荤粺澶嶄綅锛屼綆鏈夋晥
 
	input		[3:0]	sw,
	input		[1:0]	wave,
	input [26:0]    WaveFreq,
 
 
	output	reg			oled_csn,	//OLCD娑叉櫠灞忎娇鑳
	output	reg			oled_rst,	//OLCD娑叉櫠灞忓浣
	output	reg			oled_dcn,	//OLCD鏁版嵁鎸囦护鎺у埗
	output	reg			oled_clk,	//OLCD鏃堕挓淇″彿
	output	reg			oled_dat	//OLCD鏁版嵁淇″彿
);
 
	localparam INIT_DEPTH = 16'd23; //LCD鍒濆鍖栫殑鍛戒护鐨勬暟閲
	localparam IDLE = 7'h1, MAIN = 7'h2, INIT = 7'h4, SCAN = 7'h8, WRITE = 7'h10, DELAY = 7'h20,CHINESE=7'h40;
	localparam HIGH	= 1'b1, LOW = 1'b0;
	localparam DATA	= 1'b1, CMD = 1'b0;
 
	reg 	[7:0] 			cmd [24:0];
	reg 	[39:0] 			mem [122:0];
	reg		[63:0]			mem_hanzi[79:0];
	reg		[4:0]			length_hanzi;
	reg	[7:0]				y_p, x_ph, x_pl;
	reg	[(8*21-1):0]   char;
	reg	[7:0]				num, char_reg;				
	reg	[4:0]				cnt_main, cnt_init, cnt_scan, cnt_write,cnt_chinese;
	reg	[15:0]			num_delay, cnt_delay, cnt;
	reg	[6:0] 			state, state_back;
	reg [4:0]			hanzi_fuzhujishu;
 
		wire [(8*16-1):0]   char3;
	getChar3 getChar3 (
        .clk(clk),
        .rst_n(rst_n),
        .WaveFreq(WaveFreq),
        .char(char3)
    );
 
 
	always @ (posedge clk or negedge rst_n) begin
		if(!rst_n) begin
			cnt_main <= 1'b0; cnt_init <= 1'b0; cnt_scan <= 1'b0; cnt_write <= 1'b0;cnt_chinese <= 1'b0;
			y_p <= 1'b0; x_ph <= 1'b0; x_pl <= 1'b0;length_hanzi<=5'd0;hanzi_fuzhujishu<=5'd0;
			num <= 1'b0; char <= 1'b0; char_reg <= 1'b0;
			num_delay <= 16'd5; cnt_delay <= 1'b0; cnt <= 1'b0;
			oled_csn <= HIGH; oled_rst <= HIGH; oled_dcn <= CMD; oled_clk <= HIGH; oled_dat <= LOW;
			state <= IDLE; state_back <= IDLE;
		end else begin
			case(state)
				IDLE:begin
						cnt_main <= 1'b0; cnt_init <= 1'b0; cnt_scan <= 1'b0; cnt_write <= 1'b0;
						y_p <= 1'b0; x_ph <= 1'b0; x_pl <= 1'b0;
						num <= 1'b0; char <= 1'b0; char_reg <= 1'b0;
						num_delay <= 16'd5; cnt_delay <= 1'b0; cnt <= 1'b0;
						oled_csn <= HIGH; oled_rst <= HIGH; oled_dcn <= CMD; oled_clk <= HIGH; oled_dat <= LOW;
						state <= MAIN; state_back <= MAIN;
					end
				MAIN:begin
						if(cnt_main >= 5'd14) cnt_main <= 5'd12;
						else cnt_main <= cnt_main + 1'b1;
						case(cnt_main)	//MAIN鐘舵€						
							5'd0 :	begin state <= INIT; end
							5'd1 :	begin y_p <= 8'hb0; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd8; char <= "DDS     ";state <= SCAN; end
							5'd2 :	begin y_p <= 8'hb1; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd8; char <= "        ";state <= SCAN; end																								
							5'd3 :	begin y_p <= 8'hb0; x_ph <= 8'h14; x_pl <= 8'h00; num <= 5'd8; char <= "         ";state <= SCAN; end
							5'd4 :	begin y_p <= 8'hb1; x_ph <= 8'h14; x_pl <= 8'h00; num <= 5'd8; char <= "         ";state <= SCAN; end												
							5'd5 :	begin y_p <= 8'hb2; x_ph <= 8'h14; x_pl <= 8'h00; num <= 5'd8; char <= "         ";state <= SCAN; end
							5'd6 :	begin y_p <= 8'hb3; x_ph <= 8'h14; x_pl <= 8'h00; num <= 5'd8; char <= "         ";state <= SCAN; end
							5'd7 :	begin y_p <= 8'hb4; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd16; char <= "                ";state <= SCAN; end
							5'd8 :	begin y_p <= 8'hb5; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd16; char <= "                ";state <= SCAN; end
							5'd9 :	begin y_p <= 8'hb6; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd16; char <= "                ";state <= SCAN; end
							5'd10:	begin y_p <= 8'hb7; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd16; char <= "                ";state <= SCAN; end							
							5'd11:	;//begin y_p <= 8'hb1; x_ph <= 8'h15; x_pl <= 8'h00; num <= 5'd 1; char <= sw; state <= SCAN; end
							5'd12:	begin y_p <= 8'hb2; x_ph <= 8'h10; x_pl <= 8'h00; length_hanzi <= 5'd9; 
										if	   (wave==2'b00)begin hanzi_fuzhujishu<=5'd8;state <= CHINESE; end 
										else if(wave==2'b01)begin hanzi_fuzhujishu<=5'd2;state <= CHINESE; end 
										else if(wave==2'b10)begin hanzi_fuzhujishu<=5'd4;state <= CHINESE; end 
										else begin hanzi_fuzhujishu<=5'd6;state <= CHINESE; end //if(wave==2'b11)
									end
							5'd13 :	begin y_p <= 8'hb3; x_ph <= 8'h10; x_pl <= 8'h00; length_hanzi <= 5'd9; 
										if	   (wave==2'b00)begin hanzi_fuzhujishu<=5'd9;state <= CHINESE; end 
										else if(wave==2'b01)begin hanzi_fuzhujishu<=5'd3;state <= CHINESE; end 
										else if(wave==2'b10)begin hanzi_fuzhujishu<=5'd5;state <= CHINESE; end 
										else begin hanzi_fuzhujishu<=5'd7;state <= CHINESE; end //if(wave==2'b11)
									end
							5'd14 :	begin y_p <= 8'hb5; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd16; char <= char3;state <= SCAN; end
							default: state <= IDLE;
						endcase
					end
				INIT:begin	//鍒濆鍖栫姸鎬
						case(cnt_init)
							5'd0:	begin oled_rst <= LOW; cnt_init <= cnt_init + 1'b1; end	//澶嶄綅鏈夋晥
							5'd1:	begin num_delay <= 16'd25000; state <= DELAY; state_back <= INIT; cnt_init <= cnt_init + 1'b1; end	//寤舵椂澶т簬3us
							5'd2:	begin oled_rst <= HIGH; cnt_init <= cnt_init + 1'b1; end	//澶嶄綅鎭㈠
							5'd3:	begin num_delay <= 16'd25000; state <= DELAY; state_back <= INIT; cnt_init <= cnt_init + 1'b1; end	//寤舵椂澶т簬220us
							5'd4:	begin 
										if(cnt>=INIT_DEPTH) begin	//褰5鏉℃寚浠ゅ強鏁版嵁鍙戝嚭鍚庯紝閰嶇疆瀹屾垚
											cnt <= 1'b0;
											cnt_init <= cnt_init + 1'b1;
										end else begin	
											cnt <= cnt + 1'b1; num_delay <= 16'd5;
											oled_dcn <= CMD; char_reg <= cmd[cnt]; state <= WRITE; state_back <= INIT;
										end
									end
							5'd5:	begin cnt_init <= 1'b0; state <= MAIN; end	//鍒濆鍖栧畬鎴愶紝杩斿洖MAIN鐘舵€
							default: state <= IDLE;
						endcase
					end
				SCAN:begin	//鍒峰睆鐘舵€侊紝浠嶳AM涓鍙栨暟鎹埛灞
						if(cnt_scan == 5'd11) begin
							if(num) cnt_scan <= 5'd3;
							else cnt_scan <= cnt_scan + 1'b1;
						end 
						else if(cnt_scan == 5'd12) cnt_scan <= 1'b0;
						else cnt_scan <= cnt_scan + 1'b1;
						case(cnt_scan)
							5'd 0:	begin oled_dcn <= CMD; char_reg <= y_p; state <= WRITE; state_back <= SCAN; end		//瀹氫綅鍒楅〉鍦板潃
							5'd 1:	begin oled_dcn <= CMD; char_reg <= x_pl; state <= WRITE; state_back <= SCAN; end	//瀹氫綅琛屽湴鍧€浣庝綅
							5'd 2:	begin oled_dcn <= CMD; char_reg <= x_ph; state <= WRITE; state_back <= SCAN; end	//瀹氫綅琛屽湴鍧€楂樹綅
 
							5'd 3:	begin num <= num - 1'b1;end
							5'd 4:	begin oled_dcn <= DATA; char_reg <= 8'h00; state <= WRITE; state_back <= SCAN; end	//灏*8鐐归樀缂栫▼8*8
							5'd 5:	begin oled_dcn <= DATA; char_reg <= 8'h00; state <= WRITE; state_back <= SCAN; end	//灏*8鐐归樀缂栫▼8*8
							5'd 6:	begin oled_dcn <= DATA; char_reg <= 8'h00; state <= WRITE; state_back <= SCAN; end	//灏*8鐐归樀缂栫▼8*8
							5'd 7:	begin oled_dcn <= DATA; char_reg <= mem[char[(num*8)+:8]][39:32]; state <= WRITE; state_back <= SCAN; end
							5'd 8:	begin oled_dcn <= DATA; char_reg <= mem[char[(num*8)+:8]][31:24]; state <= WRITE; state_back <= SCAN; end
							5'd 9:	begin oled_dcn <= DATA; char_reg <= mem[char[(num*8)+:8]][23:16]; state <= WRITE; state_back <= SCAN; end
							5'd10:	begin oled_dcn <= DATA; char_reg <= mem[char[(num*8)+:8]][15: 8]; state <= WRITE; state_back <= SCAN; end
							5'd11:	begin oled_dcn <= DATA; char_reg <= mem[char[(num*8)+:8]][ 7: 0]; state <= WRITE; state_back <= SCAN; end
							5'd12:	begin state <= MAIN; end
							default: state <= IDLE;
						endcase
					end
 
 
 
				//length_hanzi<=5'd8-----涓€琛屽啓鍏
				CHINESE:begin	//鏄剧ず姹夊瓧
						if(cnt_chinese == 5'd11) begin
							if(length_hanzi>=5'd2) cnt_chinese <= 5'd3;
							else cnt_chinese <= cnt_chinese + 1'b1;
						end 
						else if(cnt_chinese == 5'd12) cnt_chinese <= 1'b0;
						else cnt_chinese <= cnt_chinese+1'b1;
						case(cnt_chinese)    
							5'd 0:	begin oled_dcn <= CMD; char_reg <= y_p; state <= WRITE; state_back <= CHINESE; end		//瀹氫綅鍒楅〉鍦板潃
							5'd 1:	begin oled_dcn <= CMD; char_reg <= 8'h00; state <= WRITE; state_back <= CHINESE; end	//瀹氫綅琛屽湴鍧€浣庝綅
							5'd 2:	begin oled_dcn <= CMD; char_reg <= 8'h10; state <= WRITE; state_back <= CHINESE; end	//瀹氫綅琛屽湴鍧€楂樹綅
 
							5'd 3:	begin length_hanzi <= length_hanzi - 1'b1;end//length_hanzi鍒濆=9锛氭瘡琛岄暱搴︿负8
							5'd 4:	begin oled_dcn <= DATA; char_reg <= mem_hanzi[hanzi_fuzhujishu*8+8-length_hanzi][63:56]; state <= WRITE; state_back <= CHINESE; end
							5'd 5:	begin oled_dcn <= DATA; char_reg <= mem_hanzi[hanzi_fuzhujishu*8+8-length_hanzi][55:48]; state <= WRITE; state_back <= CHINESE; end
							5'd 6:	begin oled_dcn <= DATA; char_reg <= mem_hanzi[hanzi_fuzhujishu*8+8-length_hanzi][47:40]; state <= WRITE; state_back <= CHINESE; end
							5'd 7:	begin oled_dcn <= DATA; char_reg <= mem_hanzi[hanzi_fuzhujishu*8+8-length_hanzi][39:32]; state <= WRITE; state_back <= CHINESE; end
							5'd 8:	begin oled_dcn <= DATA; char_reg <= mem_hanzi[hanzi_fuzhujishu*8+8-length_hanzi][31:24]; state <= WRITE; state_back <= CHINESE; end
							5'd 9:	begin oled_dcn <= DATA; char_reg <= mem_hanzi[hanzi_fuzhujishu*8+8-length_hanzi][23:16]; state <= WRITE; state_back <= CHINESE; end
							5'd10:	begin oled_dcn <= DATA; char_reg <= mem_hanzi[hanzi_fuzhujishu*8+8-length_hanzi][15: 8]; state <= WRITE; state_back <= CHINESE; end
							5'd11:	begin oled_dcn <= DATA; char_reg <= mem_hanzi[hanzi_fuzhujishu*8+8-length_hanzi][ 7: 0]; state <= WRITE; state_back <= CHINESE; end 
							5'd12:	begin state <= MAIN; end
							default: state <= IDLE;
						endcase
					end
 
 
 
				WRITE:begin	//WRITE鐘舵€侊紝灏嗘暟鎹寜鐓PI鏃跺簭鍙戦€佺粰灞忓箷
						if(cnt_write >= 5'd17) cnt_write <= 1'b0;
						else cnt_write <= cnt_write + 1'b1;
						case(cnt_write)
							5'd 0:	begin oled_csn <= LOW; end	//9浣嶆暟鎹渶楂樹綅涓哄懡浠ゆ暟鎹帶鍒朵綅
							5'd 1:	begin oled_clk <= LOW; oled_dat <= char_reg[7]; end	//鍏堝彂楂樹綅鏁版嵁
							5'd 2:	begin oled_clk <= HIGH; end
							5'd 3:	begin oled_clk <= LOW; oled_dat <= char_reg[6]; end
							5'd 4:	begin oled_clk <= HIGH; end
							5'd 5:	begin oled_clk <= LOW; oled_dat <= char_reg[5]; end
							5'd 6:	begin oled_clk <= HIGH; end
							5'd 7:	begin oled_clk <= LOW; oled_dat <= char_reg[4]; end
							5'd 8:	begin oled_clk <= HIGH; end
							5'd 9:	begin oled_clk <= LOW; oled_dat <= char_reg[3]; end
							5'd10:	begin oled_clk <= HIGH; end
							5'd11:	begin oled_clk <= LOW; oled_dat <= char_reg[2]; end
							5'd12:	begin oled_clk <= HIGH; end
							5'd13:	begin oled_clk <= LOW; oled_dat <= char_reg[1]; end
							5'd14:	begin oled_clk <= HIGH; end
							5'd15:	begin oled_clk <= LOW; oled_dat <= char_reg[0]; end	//鍚庡彂浣庝綅鏁版嵁
							5'd16:	begin oled_clk <= HIGH; end
							5'd17:	begin oled_csn <= HIGH; state <= DELAY; end	//
							default: state <= IDLE;
						endcase
					end
				DELAY:begin	//寤舵椂鐘舵€
						if(cnt_delay >= num_delay) begin
							cnt_delay <= 16'd0; state <= state_back; 
						end else cnt_delay <= cnt_delay + 1'b1;
					end
				default:state <= IDLE;
			endcase
		end
	end
 
	//OLED閰嶇疆鎸囦护鏁版嵁
	always@(posedge rst_n)
		begin
			cmd[0 ] = {8'hae}; 
			cmd[1 ] = {8'hd5}; 
			cmd[2 ] = {8'h80}; 
			cmd[3 ] = {8'ha8}; 
			cmd[4 ] = {8'h3f}; 
			cmd[5 ] = {8'hd3}; 
			cmd[6 ] = {8'h00}; 
			cmd[7 ] = {8'h40}; 
			cmd[8 ] = {8'h8d}; 
			cmd[9 ] = {8'h14}; 
			cmd[10] = {8'h20}; 
			cmd[11] = {8'h02};
			cmd[12] = {8'hc8};
			cmd[13] = {8'ha1};
			cmd[14] = {8'hda};
			cmd[15] = {8'h12};
			cmd[16] = {8'h81};
			cmd[17] = {8'hcf};
			cmd[18] = {8'hd9};
			cmd[19] = {8'hf1};
			cmd[20] = {8'hdb};
			cmd[21] = {8'h40};
			cmd[22] = {8'haf};
 
		end 
 
	//5*8鐐归樀瀛楀簱鏁版嵁
	always@(posedge rst_n)
		begin
			mem[  0] = {8'h3E, 8'h51, 8'h49, 8'h45, 8'h3E};   // 48  0
			mem[  1] = {8'h00, 8'h42, 8'h7F, 8'h40, 8'h00};   // 49  1
			mem[  2] = {8'h42, 8'h61, 8'h51, 8'h49, 8'h46};   // 50  2
			mem[  3] = {8'h21, 8'h41, 8'h45, 8'h4B, 8'h31};   // 51  3
			mem[  4] = {8'h18, 8'h14, 8'h12, 8'h7F, 8'h10};   // 52  4
			mem[  5] = {8'h27, 8'h45, 8'h45, 8'h45, 8'h39};   // 53  5
			mem[  6] = {8'h3C, 8'h4A, 8'h49, 8'h49, 8'h30};   // 54  6
			mem[  7] = {8'h01, 8'h71, 8'h09, 8'h05, 8'h03};   // 55  7
			mem[  8] = {8'h36, 8'h49, 8'h49, 8'h49, 8'h36};   // 56  8
			mem[  9] = {8'h06, 8'h49, 8'h49, 8'h29, 8'h1E};   // 57  9
			mem[ 10] = {8'h7C, 8'h12, 8'h11, 8'h12, 8'h7C};   // 65  A
			mem[ 11] = {8'h7F, 8'h49, 8'h49, 8'h49, 8'h36};   // 66  B
			mem[ 12] = {8'h3E, 8'h41, 8'h41, 8'h41, 8'h22};   // 67  C
			mem[ 13] = {8'h7F, 8'h41, 8'h41, 8'h22, 8'h1C};   // 68  D
			mem[ 14] = {8'h7F, 8'h49, 8'h49, 8'h49, 8'h41};   // 69  E
			mem[ 15] = {8'h7F, 8'h09, 8'h09, 8'h09, 8'h01};   // 70  F
 
			mem[ 32] = {8'h00, 8'h00, 8'h00, 8'h00, 8'h00};   // 32  sp 
			mem[ 33] = {8'h00, 8'h00, 8'h2f, 8'h00, 8'h00};   // 33  !  
			mem[ 34] = {8'h00, 8'h07, 8'h00, 8'h07, 8'h00};   // 34  
			mem[ 35] = {8'h14, 8'h7f, 8'h14, 8'h7f, 8'h14};   // 35  #
			mem[ 36] = {8'h24, 8'h2a, 8'h7f, 8'h2a, 8'h12};   // 36  $
			mem[ 37] = {8'h62, 8'h64, 8'h08, 8'h13, 8'h23};   // 37  %
			mem[ 38] = {8'h36, 8'h49, 8'h55, 8'h22, 8'h50};   // 38  &
			mem[ 39] = {8'h00, 8'h05, 8'h03, 8'h00, 8'h00};   // 39  '
			mem[ 40] = {8'h00, 8'h1c, 8'h22, 8'h41, 8'h00};   // 40  (
			mem[ 41] = {8'h00, 8'h41, 8'h22, 8'h1c, 8'h00};   // 41  )
			mem[ 42] = {8'h14, 8'h08, 8'h3E, 8'h08, 8'h14};   // 42  *
			mem[ 43] = {8'h08, 8'h08, 8'h3E, 8'h08, 8'h08};   // 43  +
			mem[ 44] = {8'h00, 8'h00, 8'hA0, 8'h60, 8'h00};   // 44  ,
			mem[ 45] = {8'h08, 8'h08, 8'h08, 8'h08, 8'h08};   // 45  -
			mem[ 46] = {8'h00, 8'h60, 8'h60, 8'h00, 8'h00};   // 46  .
			mem[ 47] = {8'h20, 8'h10, 8'h08, 8'h04, 8'h02};   // 47  /
			mem[ 48] = {8'h3E, 8'h51, 8'h49, 8'h45, 8'h3E};   // 48  0
			mem[ 49] = {8'h00, 8'h42, 8'h7F, 8'h40, 8'h00};   // 49  1
			mem[ 50] = {8'h42, 8'h61, 8'h51, 8'h49, 8'h46};   // 50  2
			mem[ 51] = {8'h21, 8'h41, 8'h45, 8'h4B, 8'h31};   // 51  3
			mem[ 52] = {8'h18, 8'h14, 8'h12, 8'h7F, 8'h10};   // 52  4
			mem[ 53] = {8'h27, 8'h45, 8'h45, 8'h45, 8'h39};   // 53  5
			mem[ 54] = {8'h3C, 8'h4A, 8'h49, 8'h49, 8'h30};   // 54  6
			mem[ 55] = {8'h01, 8'h71, 8'h09, 8'h05, 8'h03};   // 55  7
			mem[ 56] = {8'h36, 8'h49, 8'h49, 8'h49, 8'h36};   // 56  8
			mem[ 57] = {8'h06, 8'h49, 8'h49, 8'h29, 8'h1E};   // 57  9
			mem[ 58] = {8'h00, 8'h36, 8'h36, 8'h00, 8'h00};   // 58  :
			mem[ 59] = {8'h00, 8'h56, 8'h36, 8'h00, 8'h00};   // 59  ;
			mem[ 60] = {8'h08, 8'h14, 8'h22, 8'h41, 8'h00};   // 60  <
			mem[ 61] = {8'h14, 8'h14, 8'h14, 8'h14, 8'h14};   // 61  =
			mem[ 62] = {8'h00, 8'h41, 8'h22, 8'h14, 8'h08};   // 62  >
			mem[ 63] = {8'h02, 8'h01, 8'h51, 8'h09, 8'h06};   // 63  ?
			mem[ 64] = {8'h32, 8'h49, 8'h59, 8'h51, 8'h3E};   // 64  @
			mem[ 65] = {8'h7C, 8'h12, 8'h11, 8'h12, 8'h7C};   // 65  A
			mem[ 66] = {8'h7F, 8'h49, 8'h49, 8'h49, 8'h36};   // 66  B
			mem[ 67] = {8'h3E, 8'h41, 8'h41, 8'h41, 8'h22};   // 67  C
			mem[ 68] = {8'h7F, 8'h41, 8'h41, 8'h22, 8'h1C};   // 68  D
			mem[ 69] = {8'h7F, 8'h49, 8'h49, 8'h49, 8'h41};   // 69  E
			mem[ 70] = {8'h7F, 8'h09, 8'h09, 8'h09, 8'h01};   // 70  F
			mem[ 71] = {8'h3E, 8'h41, 8'h49, 8'h49, 8'h7A};   // 71  G
			mem[ 72] = {8'h7F, 8'h08, 8'h08, 8'h08, 8'h7F};   // 72  H
			mem[ 73] = {8'h00, 8'h41, 8'h7F, 8'h41, 8'h00};   // 73  I
			mem[ 74] = {8'h20, 8'h40, 8'h41, 8'h3F, 8'h01};   // 74  J
			mem[ 75] = {8'h7F, 8'h08, 8'h14, 8'h22, 8'h41};   // 75  K
			mem[ 76] = {8'h7F, 8'h40, 8'h40, 8'h40, 8'h40};   // 76  L
			mem[ 77] = {8'h7F, 8'h02, 8'h0C, 8'h02, 8'h7F};   // 77  M
			mem[ 78] = {8'h7F, 8'h04, 8'h08, 8'h10, 8'h7F};   // 78  N
			mem[ 79] = {8'h3E, 8'h41, 8'h41, 8'h41, 8'h3E};   // 79  O
			mem[ 80] = {8'h7F, 8'h09, 8'h09, 8'h09, 8'h06};   // 80  P
			mem[ 81] = {8'h3E, 8'h41, 8'h51, 8'h21, 8'h5E};   // 81  Q
			mem[ 82] = {8'h7F, 8'h09, 8'h19, 8'h29, 8'h46};   // 82  R
			mem[ 83] = {8'h46, 8'h49, 8'h49, 8'h49, 8'h31};   // 83  S
			mem[ 84] = {8'h01, 8'h01, 8'h7F, 8'h01, 8'h01};   // 84  T
			mem[ 85] = {8'h3F, 8'h40, 8'h40, 8'h40, 8'h3F};   // 85  U
			mem[ 86] = {8'h1F, 8'h20, 8'h40, 8'h20, 8'h1F};   // 86  V
			mem[ 87] = {8'h3F, 8'h40, 8'h38, 8'h40, 8'h3F};   // 87  W
			mem[ 88] = {8'h63, 8'h14, 8'h08, 8'h14, 8'h63};   // 88  X
			mem[ 89] = {8'h07, 8'h08, 8'h70, 8'h08, 8'h07};   // 89  Y
			mem[ 90] = {8'h61, 8'h51, 8'h49, 8'h45, 8'h43};   // 90  Z
			mem[ 91] = {8'h00, 8'h7F, 8'h41, 8'h41, 8'h00};   // 91  [
			mem[ 92] = {8'h55, 8'h2A, 8'h55, 8'h2A, 8'h55};   // 92  .
			mem[ 93] = {8'h00, 8'h41, 8'h41, 8'h7F, 8'h00};   // 93  ]
			mem[ 94] = {8'h04, 8'h02, 8'h01, 8'h02, 8'h04};   // 94  ^
			mem[ 95] = {8'h40, 8'h40, 8'h40, 8'h40, 8'h40};   // 95  _
			mem[ 96] = {8'h00, 8'h01, 8'h02, 8'h04, 8'h00};   // 96  '
			mem[ 97] = {8'h20, 8'h54, 8'h54, 8'h54, 8'h78};   // 97  a
			mem[ 98] = {8'h7F, 8'h48, 8'h44, 8'h44, 8'h38};   // 98  b
			mem[ 99] = {8'h38, 8'h44, 8'h44, 8'h44, 8'h20};   // 99  c
			mem[100] = {8'h38, 8'h44, 8'h44, 8'h48, 8'h7F};   // 100 d
			mem[101] = {8'h38, 8'h54, 8'h54, 8'h54, 8'h18};   // 101 e
			mem[102] = {8'h08, 8'h7E, 8'h09, 8'h01, 8'h02};   // 102 f
			mem[103] = {8'h18, 8'hA4, 8'hA4, 8'hA4, 8'h7C};   // 103 g
			mem[104] = {8'h7F, 8'h08, 8'h04, 8'h04, 8'h78};   // 104 h
			mem[105] = {8'h00, 8'h44, 8'h7D, 8'h40, 8'h00};   // 105 i
			mem[106] = {8'h40, 8'h80, 8'h84, 8'h7D, 8'h00};   // 106 j
			mem[107] = {8'h7F, 8'h10, 8'h28, 8'h44, 8'h00};   // 107 k
			mem[108] = {8'h00, 8'h41, 8'h7F, 8'h40, 8'h00};   // 108 l
			mem[109] = {8'h7C, 8'h04, 8'h18, 8'h04, 8'h78};   // 109 m
			mem[110] = {8'h7C, 8'h08, 8'h04, 8'h04, 8'h78};   // 110 n
			mem[111] = {8'h38, 8'h44, 8'h44, 8'h44, 8'h38};   // 111 o
			mem[112] = {8'hFC, 8'h24, 8'h24, 8'h24, 8'h18};   // 112 p
			mem[113] = {8'h18, 8'h24, 8'h24, 8'h18, 8'hFC};   // 113 q
			mem[114] = {8'h7C, 8'h08, 8'h04, 8'h04, 8'h08};   // 114 r
			mem[115] = {8'h48, 8'h54, 8'h54, 8'h54, 8'h20};   // 115 s
			mem[116] = {8'h04, 8'h3F, 8'h44, 8'h40, 8'h20};   // 116 t
			mem[117] = {8'h3C, 8'h40, 8'h40, 8'h20, 8'h7C};   // 117 u
			mem[118] = {8'h1C, 8'h20, 8'h40, 8'h20, 8'h1C};   // 118 v
			mem[119] = {8'h3C, 8'h40, 8'h30, 8'h40, 8'h3C};   // 119 w
			mem[120] = {8'h44, 8'h28, 8'h10, 8'h28, 8'h44};   // 120 x
			mem[121] = {8'h1C, 8'hA0, 8'hA0, 8'hA0, 8'h7C};   // 121 y
			mem[122] = {8'h44, 8'h64, 8'h54, 8'h4C, 8'h44};   // 122 z
		end
 
		//姹夊瓧锛氱‖绂惧鍫
	always@(posedge rst_n)
		begin
			mem_hanzi[  0] = {8'h04,8'h84,8'hE4,8'h5C,8'h44,8'hC4,8'h00,8'hF2};   // 48  0
			mem_hanzi[  1] = {8'h92,8'h92,8'hFE,8'h92,8'h92,8'hF2,8'h02,8'h00};   // 49  1
			mem_hanzi[  8] = {8'h02,8'h01,8'h7F,8'h10,8'h10,8'h3F,8'h80,8'h8F};   // 50  2
			mem_hanzi[  9] = {8'h54,8'h24,8'h5F,8'h44,8'h84,8'h87,8'h80,8'h00};   // 51  3
			mem_hanzi[  2] = {8'h00,8'h40,8'h44,8'h44,8'h44,8'h44,8'hC4,8'hFC};   // 52  4
			mem_hanzi[  3] = {8'hC2,8'h42,8'h42,8'h43,8'h42,8'h40,8'h00,8'h00};   // 53  5
			mem_hanzi[  10] = {8'h20,8'h20,8'h10,8'h08,8'h04,8'h03,8'h00,8'hFF};   // 54  6
			mem_hanzi[  11] = {8'h00,8'h03,8'h04,8'h08,8'h10,8'h20,8'h20,8'h00};   // 55  7
			mem_hanzi[  4] = {8'h40,8'h30,8'h11,8'h96,8'h90,8'h90,8'h91,8'h96};   // 56  8
			mem_hanzi[  5 ] = {8'h90,8'h90,8'h98,8'h14,8'h13,8'h50,8'h30,8'h00};   // 48  0
			mem_hanzi[  12] = {8'h04,8'h04,8'h04,8'h04,8'h04,8'h44,8'h84,8'h7E};   // 49  1
			mem_hanzi[  13] = {8'h06,8'h05,8'h04,8'h04,8'h04,8'h04,8'h04,8'h00};   // 50  2
			mem_hanzi[  6] = {8'h20,8'h18,8'h08,8'hEA,8'h2C,8'h28,8'h28,8'h2F};   // 51  3
			mem_hanzi[  7] = {8'h28,8'h28,8'h2C,8'hEA,8'h08,8'h28,8'h18,8'h00};   // 52  4
			mem_hanzi[  14] = {8'h40,8'h40,8'h48,8'h49,8'h49,8'h49,8'h49,8'h7F};   // 53  5
			mem_hanzi[  15] = {8'h49,8'h49,8'h49,8'h49,8'h48,8'h40,8'h40,8'h00};   // 54  6
 
			mem_hanzi[  16] ={8'h40,8'h30,8'hEF,8'h24,8'h24,8'h00,8'hFE,8'h92};//閿娇娉2 3
			mem_hanzi[  17] ={8'h92,8'h92,8'hF2,8'h92,8'h92,8'h9E,8'h80,8'h00};
			mem_hanzi[  18] ={8'h40,8'h40,8'h40,8'h7C,8'h40,8'h40,8'h40,8'h7F};
			mem_hanzi[  19] ={8'h44,8'h44,8'h44,8'h44,8'h44,8'h40,8'h40,8'h00};
			mem_hanzi[  20] ={8'h10,8'h60,8'h02,8'h0C,8'hC0,8'h00,8'hF8,8'h88};
			mem_hanzi[  21] ={8'h88,8'h88,8'hFF,8'h88,8'h88,8'hA8,8'h18,8'h00};
			mem_hanzi[  22] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  23] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};			
			mem_hanzi[  24] ={8'h01,8'h01,8'h7F,8'h21,8'h91,8'h60,8'h1F,8'h00};
			mem_hanzi[  25] ={8'hFC,8'h44,8'h47,8'h44,8'h44,8'hFC,8'h00,8'h00};
			mem_hanzi[  26] ={8'h00,8'h00,8'h7F,8'h40,8'h50,8'h48,8'h44,8'h43};
			mem_hanzi[  27] ={8'h44,8'h48,8'h50,8'h40,8'hFF,8'h00,8'h00,8'h00};
			mem_hanzi[  28] ={8'h04,8'h04,8'h7C,8'h03,8'h80,8'h60,8'h1F,8'h80}; 
			mem_hanzi[  29] ={8'h43,8'h2C,8'h10,8'h28,8'h46,8'h81,8'h80,8'h00};/*"娉,2*/
			mem_hanzi[  30] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  31] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
 
			mem_hanzi[  32] ={8'h00,8'h04,8'h84,8'h84,8'h84,8'h84,8'h84,8'h84};  //涓夎娉5
			mem_hanzi[  33] = {8'h84,8'h84,8'h84,8'h84,8'h84,8'h04,8'h00,8'h00};
			mem_hanzi[  34] ={8'h20,8'h10,8'hE8,8'h24,8'h27,8'h24,8'h24,8'hE4};
			mem_hanzi[  35] ={8'h24,8'h34,8'h2C,8'h20,8'hE0,8'h00,8'h00,8'h00};
			mem_hanzi[  36] ={8'h10,8'h60,8'h02,8'h0C,8'hC0,8'h00,8'hF8,8'h88};
			mem_hanzi[  37] ={8'h88,8'h88,8'hFF,8'h88,8'h88,8'hA8,8'h18,8'h00};
			mem_hanzi[  38] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  39] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};			
			mem_hanzi[  40] ={8'h20,8'h20,8'h20,8'h20,8'h20,8'h20,8'h20,8'h20};
			mem_hanzi[  41] ={8'h20,8'h20,8'h20,8'h20,8'h20,8'h20,8'h20,8'h00};
			mem_hanzi[  42] ={8'h80,8'h60,8'h1F,8'h09,8'h09,8'h09,8'h09,8'h7F};
			mem_hanzi[  43] ={8'h09,8'h09,8'h49,8'h89,8'h7F,8'h00,8'h00,8'h00};/*"瑙,4*/
			mem_hanzi[  44] ={8'h04,8'h04,8'h7C,8'h03,8'h80,8'h60,8'h1F,8'h80};
			mem_hanzi[  45] ={8'h43,8'h2C,8'h10,8'h28,8'h46,8'h81,8'h80,8'h00};/*"娉,5*/
			mem_hanzi[  46] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  47] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};			
 
			mem_hanzi[  48] ={8'h08,8'h08,8'h08,8'h08,8'h08,8'hF8,8'h89,8'h8E};
			mem_hanzi[  49] ={8'h88,8'h88,8'h88,8'h88,8'h08,8'h08,8'h08,8'h00};
			mem_hanzi[  50] ={8'h10,8'h60,8'h02,8'h0C,8'hC0,8'h00,8'hF8,8'h88}; 
			mem_hanzi[  51] ={8'h88,8'h88,8'hFF,8'h88,8'h88,8'hA8,8'h18,8'h00};
			mem_hanzi[  52] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  53] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};	
			mem_hanzi[  54] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  55] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};						
			mem_hanzi[  56] ={8'h00,8'h80,8'h40,8'h20,8'h18,8'h07,8'h00,8'h00};
			mem_hanzi[  57] ={8'h40,8'h80,8'h40,8'h3F,8'h00,8'h00,8'h00,8'h00};/*"鏂,6*/
			mem_hanzi[  58] ={8'h04,8'h04,8'h7C,8'h03,8'h80,8'h60,8'h1F,8'h80};
			mem_hanzi[  59] = {8'h43,8'h2C,8'h10,8'h28,8'h46,8'h81,8'h80,8'h00};/*"娉,7*/
			mem_hanzi[  60] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  61] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};	
			mem_hanzi[  62] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  63] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
 
 
			mem_hanzi[  64] ={8'h00,8'h02,8'h02,8'hC2,8'h02,8'h02,8'h02,8'hFE};//姝ｅ鸡娉89
			mem_hanzi[  65] ={8'h82,8'h82,8'h82,8'h82,8'h82,8'h02,8'h00,8'h00};
			mem_hanzi[  66] ={8'h02,8'hE2,8'h22,8'h22,8'h3E,8'h00,8'h08,8'h88};
			mem_hanzi[  67] = {8'h48,8'h39,8'h0E,8'h08,8'hC8,8'h08,8'h08,8'h00};
			mem_hanzi[  68] ={8'h10,8'h60,8'h02,8'h0C,8'hC0,8'h00,8'hF8,8'h88}; 
			mem_hanzi[  69] ={8'h88,8'h88,8'hFF,8'h88,8'h88,8'hA8,8'h18,8'h00};
			mem_hanzi[  70] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  71] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};			
			mem_hanzi[  72] ={8'h40,8'h40,8'h40,8'h7F,8'h40,8'h40,8'h40,8'h7F};
			mem_hanzi[  73] ={8'h40,8'h40,8'h40,8'h40,8'h40,8'h40,8'h40,8'h00};/*"姝,8*/
			mem_hanzi[  74] ={8'h00,8'h43,8'h82,8'h42,8'h3E,8'h00,8'h21,8'h71};
			mem_hanzi[  75] ={8'h29,8'h25,8'h23,8'h21,8'h28,8'h70,8'h00,8'h00};/*"寮,9*/
			mem_hanzi[  76] ={8'h04,8'h04,8'h7C,8'h03,8'h80,8'h60,8'h1F,8'h80};
			mem_hanzi[  77] ={8'h43,8'h2C,8'h10,8'h28,8'h46,8'h81,8'h80,8'h00};/*"娉,10*/
			mem_hanzi[  78] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};
			mem_hanzi[  79] ={8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00,8'h00};			
 
		end
endmodule