对于小脚丫驱动 OLED12832（SSD1306）代码的研究笔记。

内容为个人理解，不一定正确。

1. 数据手册

SSD1306数据手册/SSD1306规格书与控制芯片手册.zip · SwetyCore/个人网盘01 - Gitee.com

2. 分析

连线

引脚	作用
oled_dcn	这是数据/命令控制引脚。当它被拉高(即连接到VDD)，数据D[7:0]作为数据处理。当它被拉低时，D[7:0]处的数据将被传输到命令寄存器。在I2C模式下，该引脚作为SA0来选择从地址。当选择三线串行接口时，此引脚必须连接到VSS。具体与单片机接口信号的关系请参考定时特性。
oled_dat
oled_csn	这个引脚是芯片选择输入。(低电平有效)

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	input				clk,		//12MHz系统时钟
	input				rst_n,		//系统复位，低有效
	
	input [7:0]	        data,		//
	output	reg			oled_csn,	//OLCD液晶屏使能
	output	reg			oled_rst,	//OLCD液晶屏复位
	output	reg			oled_dcn,	//OLCD数据指令控制
	output	reg			oled_clk,	//OLCD时钟信号
	output	reg			oled_dat	//OLCD数据信号

变量对照表

变量名	作用
INIT_DEPTH	初始化的命令的数量
IDLE，MAIN，INIT，SCAN，WRITE ， DELAY	模块工作状态（值）
HIGH/LOW，DATA/CMD	高/低电平，数据/指令选择
[7:0] cmd [24:0]	存储初始化屏幕指令
[39:0] mem [122:0];	存储 5*8 字库
[7:0] y_p，x_ph，x_pl;	定位列页地址，定位行地址低位，定位行地址高位
[(8*21-1):0] char;	存储要显示的字
[7:0] num, char_reg;	要显示的字数量，？将要发送到oled的数据
[4:0] cnt_main, cnt_init, cnt_scan, cnt_write;	各种模块工作状态的子状态（名)
[15:0] num_delay, cnt_delay, cnt;	delay计数，delay设定值，指令发送计数
[5:0] state, state_back;	模块工作状态（名），执行完后要回到的状态

模块状态机分析

空闲(idle状态)

各种变量的初始化

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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

屏幕初始化( init 状态)

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	INIT:begin	//初始化状态
		case(cnt_init)
			5'd0:	begin oled_rst <= LOW; cnt_init <= cnt_init + 1'b1; end	//复位有效
			//rst 引脚拉低，进入下一个状态。
			5'd1:	begin num_delay <= 16'd25000; state <= DELAY; state_back <= INIT; cnt_init <= cnt_init + 1'b1; end	//延时大于3us
			5'd2:	begin oled_rst <= HIGH; cnt_init <= cnt_init + 1'b1; end	//复位恢复
				//rst 拉高
			5'd3:	begin num_delay <= 16'd25000; state <= DELAY; state_back <= INIT; cnt_init <= cnt_init + 1'b1; end	//延时大于220us
			5'd4:	begin 
			//发送data
				if(cnt>=INIT_DEPTH) begin	//当25条指令及数据发出后，配置完成
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	//初始化完成，返回MAIN状态
			default: state <= IDLE;
		endcase
	end

Main状态

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SCAN:begin	//刷屏状态，从RAM中读取数据刷屏
	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		//定位列页地址
		5'd 1:	begin oled_dcn <= CMD; char_reg <= x_pl; state <= WRITE; state_back <= SCAN; end	//定位行地址低位
		5'd 2:	begin oled_dcn <= CMD; char_reg <= x_ph; state <= WRITE; state_back <= SCAN; end	//定位行地址高位

		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	//将5*8点阵编程8*8
		5'd 5:	begin oled_dcn <= DATA; char_reg <= 8'h00; state <= WRITE; state_back <= SCAN; end	//将5*8点阵编程8*8
		5'd 6:	begin oled_dcn <= DATA; char_reg <= 8'h00; state <= WRITE; state_back <= SCAN; end	//将5*8点阵编程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
```

Delay状态？

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DELAY:begin	//延时状态
	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;

Write状态

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WRITE:begin	//WRITE状态，将数据按照SPI时序发送给屏幕
	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位数据最高位为命令数据控制位
		5'd 1:	begin oled_clk <= LOW; oled_dat <= char_reg[7]; end	//先发高位数据
		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	//后发低位数据
		5'd16:	begin oled_clk <= HIGH; end
		5'd17:	begin oled_csn <= HIGH; state <= DELAY; end	//
		default: state <= IDLE;
	endcase
end

上升沿发送数据，共发送八位。

Scan

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SCAN:begin	//刷屏状态，从RAM中读取数据刷屏
	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		//定位列页地址
		5'd 1:	begin oled_dcn <= CMD; char_reg <= x_pl; state <= WRITE; state_back <= SCAN; end	//定位行地址低位
		5'd 2:	begin oled_dcn <= CMD; char_reg <= x_ph; state <= WRITE; state_back <= SCAN; end	//定位行地址高位

		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	//将5*8点阵编程8*8
		5'd 5:	begin oled_dcn <= DATA; char_reg <= 8'h00; state <= WRITE; state_back <= SCAN; end	//将5*8点阵编程8*8
		5'd 6:	begin oled_dcn <= DATA; char_reg <= 8'h00; state <= WRITE; state_back <= SCAN; end	//将5*8点阵编程8*8(占三位？？？)
		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

mem[char[(num*8)+:8]][ 7: 0] 的理解:

mem为字库（二维列表）

char存有字符串八位二进制 ASCI 表示

假设 char 为"—————-" (16个“ - ”)

“-”的asci码为45 对应 mem[ 45] = {8'h08, 8'h08, 8'h08, 8'h08, 8'h08}; // 45 -

此时 num 为16，[(num*8)+:8] 即为从 16*8 位置开始，取8位，刚好是 45 。

然后 num 逐次减一直至取完第一个字符的 ASCI 码。

3. 原代码

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module oled12832
(
	input				clk,		//12MHz系统时钟
	input				rst_n,		//系统复位，低有效
	
	input [7:0]	        data,		//
	
	output	reg			oled_csn,	//OLCD液晶屏使能
	output	reg			oled_rst,	//OLCD液晶屏复位
	output	reg			oled_dcn,	//OLCD数据指令控制
	output	reg			oled_clk,	//OLCD时钟信号
	output	reg			oled_dat	//OLCD数据信号
);
	
	localparam INIT_DEPTH = 16'd25; //LCD初始化的命令的数量
	localparam IDLE = 6'h1, MAIN = 6'h2, INIT = 6'h4, SCAN = 6'h8, WRITE = 6'h10, DELAY = 6'h20;
	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	[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;
	reg	[15:0]	num_delay, cnt_delay, cnt;
	reg	[5:0] 	state, state_back;
	
	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;
			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 <= 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'd6) cnt_main <= 5'd5;
						else cnt_main <= cnt_main + 1'b1;
						case(cnt_main)	//MAIN状态
							5'd0:	begin state <= INIT; end
							5'd1:	begin y_p <= 8'hb0; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd16; char <= "----------------";state <= SCAN; end
							5'd2:	begin y_p <= 8'hb1; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd16; char <= " voltage:  . V  ";state <= SCAN; end
							5'd3:	begin y_p <= 8'hb2; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd16; char <= "                ";state <= SCAN; end
							
							5'd4:	begin y_p <= 8'hb3; x_ph <= 8'h10; x_pl <= 8'h00; num <= 5'd16; char <= "----------------";state <= SCAN; end
							
							//5'd5:	begin y_p <= 8'hb0; x_ph <= 8'h15; x_pl <= 8'h00; num <= 5'd 1; char <= data[3:0]; state <= SCAN; end
							//5'd5:	begin y_p <= 8'hb1; x_ph <= 8'h15; x_pl <= 8'h00; num <= 5'd 3; char <={data[7:4],"."data[3:0]}; state <= SCAN; end
							5'd5:	begin y_p <= 8'hb1; x_ph <= 8'h15; x_pl <= 8'h00; num <= 5'd 1; char <=data[7:4]; state <= SCAN; end
							5'd6:	begin y_p <= 8'hb1; x_ph <= 8'h16; x_pl <= 8'h00; num <= 5'd 1; char <=data[3:0]; state <= SCAN; end
							//5'd6:	begin y_p <= 8'hb3; x_ph <= 8'h15; x_pl <= 8'h00; num <= 5'd 1; char <= "O"; state <= SCAN; end

							default: state <= IDLE;
						endcase
					end
				INIT:begin	//初始化状态
						case(cnt_init)
							5'd0:	begin oled_rst <= LOW; cnt_init <= cnt_init + 1'b1; end	//复位有效
							5'd1:	begin num_delay <= 16'd25000; state <= DELAY; state_back <= INIT; cnt_init <= cnt_init + 1'b1; end	//延时大于3us
							5'd2:	begin oled_rst <= HIGH; cnt_init <= cnt_init + 1'b1; end	//复位恢复
							5'd3:	begin num_delay <= 16'd25000; state <= DELAY; state_back <= INIT; cnt_init <= cnt_init + 1'b1; end	//延时大于220us
							5'd4:	begin 
										if(cnt>=INIT_DEPTH) begin	//当25条指令及数据发出后，配置完成
											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	//初始化完成，返回MAIN状态
							default: state <= IDLE;
						endcase
					end
				SCAN:begin	//刷屏状态，从RAM中读取数据刷屏
						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		//定位列页地址
							5'd 1:	begin oled_dcn <= CMD; char_reg <= x_pl; state <= WRITE; state_back <= SCAN; end	//定位行地址低位
							5'd 2:	begin oled_dcn <= CMD; char_reg <= x_ph; state <= WRITE; state_back <= SCAN; end	//定位行地址高位
							
							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	//将5*8点阵编程8*8
							5'd 5:	begin oled_dcn <= DATA; char_reg <= 8'h00; state <= WRITE; state_back <= SCAN; end	//将5*8点阵编程8*8
							5'd 6:	begin oled_dcn <= DATA; char_reg <= 8'h00; state <= WRITE; state_back <= SCAN; end	//将5*8点阵编程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
				WRITE:begin	//WRITE状态，将数据按照SPI时序发送给屏幕
						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位数据最高位为命令数据控制位
							5'd 1:	begin oled_clk <= LOW; oled_dat <= char_reg[7]; end	//先发高位数据
							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	//后发低位数据
							5'd16:	begin oled_clk <= HIGH; end
							5'd17:	begin oled_csn <= HIGH; state <= DELAY; end	//
							default: state <= IDLE;
						endcase
					end
				DELAY:begin	//延时状态
						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配置指令数据
	always@(posedge rst_n)
		begin
			cmd[ 0] = {8'hae}; 
			cmd[ 1] = {8'h00}; 
			cmd[ 2] = {8'h10}; 
			cmd[ 3] = {8'h00}; 
			cmd[ 4] = {8'hb0}; 
			cmd[ 5] = {8'h81}; 
			cmd[ 6] = {8'hff}; 
			cmd[ 7] = {8'ha1}; 
			cmd[ 8] = {8'ha6}; 
			cmd[ 9] = {8'ha8}; 
			cmd[10] = {8'h1f}; 
			cmd[11] = {8'hc8};
			cmd[12] = {8'hd3};
			cmd[13] = {8'h00};
			cmd[14] = {8'hd5};
			cmd[15] = {8'h80};
			cmd[16] = {8'hd9};
			cmd[17] = {8'h1f};
			cmd[18] = {8'hda};
			cmd[19] = {8'h00};
			cmd[20] = {8'hdb};
			cmd[21] = {8'h40};
			cmd[22] = {8'h8d};
			cmd[23] = {8'h14};
			cmd[24] = {8'haf};
		end 
		
	//5*8点阵字库数据
	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
	
endmodule