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FPGA基于VGA显示字符及图片
2022-06-25 10:21:00 【Chleto】
一、了解VGA协议
VGA（Video Graphics Array）视频图形阵列是IBM于1987年提出的一个使用模拟信号的电脑显示标准。VGA接口即电脑采用VGA标准输出数据的专用接口。VGA接口共有15针，分成3排，每排5个孔，显卡上应用最为广泛的接口类型，绝大多数显卡都带有此种接口。它传输红、绿、蓝模拟信号以及同步信号(水平和垂直信号)。VGA显示器具有成本低、结构简单、应用灵活的优点。
硬件接口
VGA 的驱动电路常用的有 2 种：
（1） R-2R 电阻模拟电路设计方案
在 [email protected] 及以下的分辨率条件下稳定运行，多见于 16 位的 VGA 接口中，通常不需要 VGA_clk 和 VGA_blank 信号。
（2）专用视频转换 DAC 芯片实现 VGA电路方案，常见于 24 位的 VGA 接口中，通常需要 VGA_clk 和 VGA_blank 信号，有些还有 VGA_sync 信号，但该信号一般在电路上就接地了。
RGB信号在使用时的位宽有三种常见格式，以你的VGA解码芯片的配置有关。
1. RGB_8，R：G：B = 3：3：2，即RGB332
2. RGB_16，R：G：B = 5：6：5，即RGB565
3. RGB_24，R：G：B = 8：8：8，即RGB888
扫描方式
VGA显示器扫描方式分为逐行扫描和隔行扫描：逐行扫描是扫描从屏幕左上角一点开始，从左像右逐点扫描，每扫描完一行,电子束回到屏幕的左边下一行的起始位置，在这期间，CRT对电子束进行消隐，每行结束时，用行同步信号进行同步；当扫描完所有的行，形成一帧，用场同步信号进行场同步，并使扫描回到屏幕左上方，同时进行场消隐,开始下一帧。隔行扫描是指电子束扫描时每隔一行扫一线，完成一屏后在返回来扫描剩下的线，隔行扫描的显示器闪烁的厉害，会让使用者的眼睛疲劳。因此我们一般都采用逐行扫描的方式。
行场信号
行场信号共有 4 种模式，即 hsync 和 vsync 的高低状态不同，如下所示：
时序要求
从VGA的时序图中， 可以看出，帧时序和行时序都产生了四部分，帧时序的四个部分分别是：同步脉冲（o），显示后沿（p），显示时序段（q）和显示前沿（r）。其中同步脉冲(o)，显示后沿（p）和显示前沿（r）是消隐区，RGB信号无效，屏幕不显示数据。显示数据段（q）是有效数据区。行时序的四个部分是：同步脉冲（a）,显示后沿（b），显示时序段（c）和显示前沿（d）。其中同步脉冲（a），显示后沿（b），显示前沿（d）是消隐区，RGB信号无效，屏幕不显示数据。显示时序段（c）是有效数据区。
二、具体实现
1、生成字模
生成字模数据：
2、使用quartus创建项目
添加代码
module VGA_test(
OSC_50, //原CLK2_50时钟信号
VGA_CLK, //VGA自时钟
VGA_HS, //行同步信号
VGA_VS, //场同步信号
VGA_BLANK, //复合空白信号控制信号 当BLANK为低电平时模拟视频输出消隐电平，此时从R9~R0,G9~G0,B9~B0输入的所有数据被忽略
VGA_SYNC, //符合同步控制信号 行时序和场时序都要产生同步脉冲
VGA_R, //VGA绿色
VGA_B, //VGA蓝色
VGA_G); //VGA绿色
input OSC_50; //外部时钟信号CLK2_50
output VGA_CLK,VGA_HS,VGA_VS,VGA_BLANK,VGA_SYNC;
output [7:0] VGA_R,VGA_B,VGA_G;
parameter H_FRONT = 16; //行同步前沿信号周期长
parameter H_SYNC = 96; //行同步信号周期长
parameter H_BACK = 48; //行同步后沿信号周期长
parameter H_ACT = 640; //行显示周期长
parameter H_BLANK = H_FRONT+H_SYNC+H_BACK; //行空白信号总周期长
parameter H_TOTAL = H_FRONT+H_SYNC+H_BACK+H_ACT; //行总周期长耗时
parameter V_FRONT = 11; //场同步前沿信号周期长
parameter V_SYNC = 2; //场同步信号周期长
parameter V_BACK = 31; //场同步后沿信号周期长
parameter V_ACT = 480; //场显示周期长
parameter V_BLANK = V_FRONT+V_SYNC+V_BACK; //场空白信号总周期长
parameter V_TOTAL = V_FRONT+V_SYNC+V_BACK+V_ACT; //场总周期长耗时
reg [10:0] H_Cont; //行周期计数器
reg [10:0] V_Cont; //场周期计数器
wire [7:0] VGA_R; //VGA红色控制线
wire [7:0] VGA_G; //VGA绿色控制线
wire [7:0] VGA_B; //VGA蓝色控制线
reg VGA_HS;
reg VGA_VS;
reg [10:0] X; //当前行第几个像素点
reg [10:0] Y; //当前场第几行
reg CLK_25;
[email protected](posedge OSC_50)
begin
CLK_25=~CLK_25; //时钟
end
assign VGA_SYNC = 1'b0; //同步信号低电平
assign VGA_BLANK = ~((H_Cont<H_BLANK)||(V_Cont<V_BLANK)); //当行计数器小于行空白总长或场计数器小于场空白总长时，空白信号低电平
assign VGA_CLK = ~CLK_to_DAC; //VGA时钟等于CLK_25取反
assign CLK_to_DAC = CLK_25;
[email protected](posedge CLK_to_DAC)
begin
if(H_Cont<H_TOTAL) //如果行计数器小于行总时长
H_Cont<=H_Cont+1'b1; //行计数器+1
else H_Cont<=0; //否则行计数器清零
if(H_Cont==H_FRONT-1) //如果行计数器等于行前沿空白时间-1
VGA_HS<=1'b0; //行同步信号置0
if(H_Cont==H_FRONT+H_SYNC-1) //如果行计数器等于行前沿+行同步-1
VGA_HS<=1'b1; //行同步信号置1
if(H_Cont>=H_BLANK) //如果行计数器大于等于行空白总时长
X<=H_Cont-H_BLANK; //X等于行计数器-行空白总时长 （X为当前行第几个像素点）
else X<=0; //否则X为0
end
[email protected](posedge VGA_HS)
begin
if(V_Cont<V_TOTAL) //如果场计数器小于行总时长
V_Cont<=V_Cont+1'b1; //场计数器+1
else V_Cont<=0; //否则场计数器清零
if(V_Cont==V_FRONT-1) //如果场计数器等于场前沿空白时间-1
VGA_VS<=1'b0; //场同步信号置0
if(V_Cont==V_FRONT+V_SYNC-1) //如果场计数器等于行前沿+场同步-1
VGA_VS<=1'b1; //场同步信号置1
if(V_Cont>=V_BLANK) //如果场计数器大于等于场空白总时长
Y<=V_Cont-V_BLANK; //Y等于场计数器-场空白总时长 （Y为当前场第几行）
else Y<=0; //否则Y为0
end
reg valid_yr;
[email protected](posedge CLK_to_DAC)
if(V_Cont == 10'd32) //场计数器=32时
valid_yr<=1'b1; //行输入激活
else if(V_Cont==10'd512) //场计数器=512时
valid_yr<=1'b0; //行输入冻结
wire valid_y=valid_yr; //连线
reg valid_r;
[email protected](posedge CLK_to_DAC)
if((H_Cont == 10'd32)&&valid_y) //行计数器=32时
valid_r<=1'b1; //像素输入激活
else if((H_Cont==10'd512)&&valid_y) //行计数器=512时
valid_r<=1'b0; //像素输入冻结
wire valid = valid_r; //连线
wire[10:0] x_dis; //像素显示控制信号
wire[10:0] y_dis; //行显示控制信号
assign x_dis=X; //连线X
assign y_dis=Y; //连线Y
parameter //点阵字模：每一行char_lineXX是显示的一行，共272列
char_line00=320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000, //第1行
char_line01=320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000, //第2行
char_line02=320'h00038000008002000000000000000000000000000000000000000000000000000000000000000000, //第3行
char_line03=320'h0003C00000E003000000018000000000000000000000000000000000000000000000000000000000,//第4行
char_line04=320'h0003801000C0078000000FC000000000000000000000000000000000000000000000000000000000,//第5行
char_line05=320'h0003803800C00E000103FE0000000000000000000000000000000000000000000000000000000000, //第6行
char_line06=320'h3FFFFFFC00C01C0001FC0000000001E007C0008007C003C01FFC03C001E003C00FFC008003C00000, //第7行
char_line07=320'h180FE00000C03800018000000000061818600180182006201FFC0620061806200FFC018006200000, //第8行
char_line08=320'h001FF00000C060000180C00000000C1830301F8030100C3010080C300C180C3010001F800C300000, //第9行
char_line09=320'h003FB80000C0C0000100E00000000818301801803018181830101818081818181000018018180000, //第10行
char_line0a=320'h007B9C0000C180000300C00000001800301801806008181820101818180018181000018018180000, //第11行
char_line0b=320'h00F39E0000C200000300C0000000100030180180600C180820201808100018081000018018080000, //第12行
char_line0c=320'h01E38F8000CC00000300C0000000100000180180600C300C0020300C1000300C10000180300C0000, //第13行
char_line0d=320'h03C387F000D000000300C0000000300000180180600C300C0040300C3000300C10000180300C0000, //第14行
char_line0e=320'h07838DFE00C000300300C030000033E000300180600C300C0040300C33E0300C13E00180300C0000, //第15行
char_line0f=320'h1FFFFEF83FFFFFF807FFFFF80000363000600180600C300C0040300C3630300C14300180300C0000, //第16行
char_line10=320'h38401F3000C100000200C0007FFE381803C00180701C300C0080300C3818300C18180180300C0000, //第17行
char_line11=320'h60003C0000C100000000C0000000380800700180302C300C0080300C3808300C10080180300C0000, //第18行
char_line12=320'h0001F00000C080000000C0000000300C00180180186C300C0100300C300C300C000C0180300C0000, //第19行
char_line13=320'h0001E00000C0C0000030C4000000300C000801800F8C300C0100300C300C300C000C0180300C0000, //第20行
char_line14=320'h0001E01000C060000038C2000000300C000C0180000C300C0100300C300C300C000C0180300C0000, //第21行
char_line15=320'h0001C03800C030000060C1800000300C000C01800018300C0100300C300C300C000C0180300C0000, //第22行
char_line16=320'h7FFFFFFC00C0380000C0C0C00000300C300C01800018180803001808300C1808300C018018080000, //第23行
char_line17=320'h3801C00000C01C000180C0E00000180C300C01800010181803001818180C1818300C018018180000, //第24行
char_line18=320'h0001C00000C00F000300C07000001808300801803030181803001818180818182018018018180000, //第25行
char_line19=320'h0001C00000C0C7C00600C03000000C183018018030600C3003000C300C180C30201801800C300000, //第26行
char_line1a=320'h0001C00000C301FC0C00C03000000E30183003C030C00620030006200E300620183003C006200000, //第27行
char_line1b=320'h0001C00000DC00F81010C030000003E007C01FF80F8003C0030003C003E003C007C01FF803C00000, //第28行
char_line1c=320'h003FC00000F80010200FC00000000000000000000000000000000000000000000000000000000000, //第29行
char_line1d=320'h0007C00000E000000003C00000000000000000000000000000000000000000000000000000000000, //第30行
char_line1e=320'h00038000004000000001000000000000000000000000000000000000000000000000000000000000, //第31行
char_line1f=320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000; //第32行
reg[8:0] char_bit;
[email protected](posedge CLK_to_DAC)
if(X==10'd144)char_bit<=9'd320; //当显示到144像素时准备开始输出图像数据
else if(X>10'd144&&X<10'd416) //左边距屏幕144像素到416像素时 416=144+272（图像宽度）
char_bit<=char_bit-1'b1; //倒着输出图像信息
reg[29:0] vga_rgb; //定义颜色缓存
[email protected](posedge CLK_to_DAC)
if(X>10'd144&&X<10'd416) //X控制图像的横向显示边界：左边距屏幕左边144像素 右边界距屏幕左边界416像素
begin case(Y) //Y控制图像的纵向显示边界：从距离屏幕顶部160像素开始显示第一行数据
10'd160:
if(char_line00[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000; //如果该行有数据 则颜色为红色
else vga_rgb<=30'b0000000000_0000000000_0000000000; //否则为黑色
10'd162:
if(char_line01[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd163:
if(char_line02[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd164:
if(char_line03[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd165:
if(char_line04[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd166:
if(char_line05[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd167:
if(char_line06[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd168:
if(char_line07[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd169:
if(char_line08[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd170:
if(char_line09[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd171:
if(char_line0a[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd172:
if(char_line0b[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd173:
if(char_line0c[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd174:
if(char_line0d[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd175:
if(char_line0e[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd176:
if(char_line0f[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd177:
if(char_line10[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd178:
if(char_line11[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd179:
if(char_line12[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd180:
if(char_line13[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd181:
if(char_line14[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd182:
if(char_line15[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd183:
if(char_line16[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd184:
if(char_line17[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd185:
if(char_line18[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd186:
if(char_line19[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd187:
if(char_line1a[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd188:
if(char_line1b[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd189:
if(char_line1c[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd190:
if(char_line1d[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd191:
if(char_line1e[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
10'd192:
if(char_line1f[char_bit])vga_rgb<=30'b1111111111_0000000000_0000000000;
else vga_rgb<=30'b0000000000_0000000000_0000000000;
default:vga_rgb<=30'h0000000000; //默认颜色黑色
endcase
end
else vga_rgb<=30'h000000000; //否则黑色
assign VGA_R=vga_rgb[23:16];
assign VGA_G=vga_rgb[15:8];
assign VGA_B=vga_rgb[7:0];
endmodule
三、添加色块
添加代码：
module data_drive (input wire vga_clk,
input wire rst_n,
input wire [ 11:0 ] addr_h,
input wire [ 11:0 ] addr_v,
input wire [ 2:0 ] key,
output reg [ 15:0 ] rgb_data);
localparam red = 16'd63488;
localparam orange = 16'd64384;
localparam yellow = 16'd65472;
localparam green = 16'd1024;
localparam blue = 16'd31;
localparam indigo = 16'd18448;
localparam purple = 16'd32784;
localparam white = 16'd65503;
localparam black = 16'd0;
reg [ 383:0 ] char_line[ 64:0 ];
localparam states_1 = 1; // 彩条
localparam states_2 = 2; // 字符
localparam states_3 = 3; // 图片
parameter height = 78; // 图片高度
parameter width = 128; // 图片宽度
reg [ 1:0 ] states_current ; // 当前状态
reg [ 1:0 ] states_next ; // 下个状态
reg [ 13:0 ] rom_address ; // ROM地址
wire [ 15:0 ] rom_data ; // 图片数据
wire flag_enable_out1 ; // 文字有效区域
wire flag_enable_out2 ; // 图片有效区域
wire flag_clear_rom_address ; // 地址清零
wire flag_begin_h ; // 图片显示行
wire flag_begin_v ; // 图片显示列
//状态转移
always @( posedge vga_clk or negedge rst_n ) begin
if ( !rst_n ) begin
states_current <= states_1;
end
else begin
states_current <= states_next;
end
end
//状态判断
always @( posedge vga_clk or negedge rst_n ) begin
if ( !rst_n ) begin
states_next <= states_1;
end
else if ( key[ 0 ] ) begin
states_next <= states_1;
end
else if ( key[ 1 ] ) begin
states_next <= states_2;
end
else if ( key[ 2 ] ) begin
states_next <= states_3;
end
else begin
states_next <= states_next;
end
end
//状态输出
always @( * ) begin
case ( states_current )
states_1 : begin
if ( addr_h == 0 ) begin
rgb_data = black;
end
else if ( addr_h >0 && addr_h <81 ) begin
rgb_data = red;
end
else if ( addr_h >80 && addr_h <161 ) begin
rgb_data = orange;
end
else if ( addr_h >160 && addr_h <241 ) begin
rgb_data = yellow;
end
else if ( addr_h >240 && addr_h <321 ) begin
rgb_data = green;
end
else if ( addr_h >320 && addr_h <401 ) begin
rgb_data = blue;
end
else if ( addr_h >400 && addr_h <481 ) begin
rgb_data = indigo;
end
else if ( addr_h >480 && addr_h <561 ) begin
rgb_data = purple;
end
else if ( addr_h >560 && addr_h <641 ) begin
rgb_data = white;
end
else begin
rgb_data = black;
end
end
states_2 : begin
if ( flag_enable_out1 ) begin
rgb_data = char_line[ addr_v-208 ][ 532 - addr_h ]? white:black;
end
else begin
rgb_data = black;
end
end
states_3 : begin
if ( flag_enable_out2 ) begin
rgb_data = rom_data;
end
else begin
rgb_data = black;
end
end
default: begin
case ( addr_h )
0 : rgb_data = black;
1 : rgb_data = red;
81 : rgb_data = orange;
161: rgb_data = yellow;
241: rgb_data = green;
321: rgb_data = blue;
401: rgb_data = indigo;
481: rgb_data = purple;
561: rgb_data = white;
default: rgb_data = rgb_data;
endcase
end
endcase
end
assign flag_enable_out1 = states_current == states_2 && addr_h > 148 && addr_h < 533 && addr_v > 208 && addr_v < 273 ;
assign flag_begin_h = addr_h > ( ( 640 - width ) / 2 ) && addr_h < ( ( 640 - width ) / 2 ) + width + 1;
assign flag_begin_v = addr_v > ( ( 480 - height )/2 ) && addr_v <( ( 480 - height )/2 ) + height + 1;
assign flag_enable_out2 = states_current == states_3 && flag_begin_h && flag_begin_v;
//ROM地址计数器
always @( posedge vga_clk or negedge rst_n ) begin
if ( !rst_n ) begin
rom_address <= 0;
end
else if ( flag_clear_rom_address ) begin //计数满清零
rom_address <= 0;
end
else if ( flag_enable_out2 ) begin //在有效区域内+1
rom_address <= rom_address + 1;
end
else begin //无效区域保持
rom_address <= rom_address;
end
end
assign flag_clear_rom_address = rom_address == height * width - 1;
//初始化显示文字
[email protected]( posedge vga_clk or negedge rst_n ) begin
if ( !rst_n ) begin
char_line[ 0 ] = 384'h000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000;
char_line[ 1 ] = 384'h000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000;
char_line[ 2 ] = 384'h000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000;
char_line[ 3 ] = 384'h000000000000000000000008000000000000000000000000000000000000000000000000000000000000200000800000;
char_line[ 4 ] = 384'h0000000001E000000000000E000000000000000000000000000000000002000000000000000000000000380000E00000;
char_line[ 5 ] = 384'h0000003000F800000000000780000000000000000000000000000000000F0000001000000000080000003E0000F80000;
char_line[ 6 ] = 384'h00000070007C000000000003C0000000000000000000000000000000007F8000000C000000001C0000003E0000FC0000;
char_line[ 7 ] = 384'h000000F8007E000000000003C000000000000000000000000000000003FFC000000FFFFFFFFFFE0000003C0000F00000;
char_line[ 8 ] = 384'h3FFFFFFC003E000000000003C00300000000000000000000000000003FFFE000000FFFFFFFFFFF0000003C0000F00000;
char_line[ 9 ] = 384'h3FFFFFFE003E000000000001C0078000000000000000000000000007FFFF8000000F000000003E0000003C0000F00000;
char_line[ 10 ] = 384'h1F3E7C00003E0180001FFFFFFFFFC0000000000000000000000000FFFF800000000F000000003C0000003C0000F00000;
char_line[ 11 ] = 384'h003E7C00001E03C0000FFFFFFFFFE000000000000000000000003FFFC0000000000F000000003C0000003C0000F00000;
char_line[ 12 ] = 384'h003E7C00001C07E000000600010000000000000000000000001FFFC3C0000000000F000000003C0000003C3000F00600;
char_line[ 13 ] = 384'h003E7C07FFFFFFF00000038003C00000000000000000000000300003C0000000000F000000003C0000003C7800F00F00;
char_line[ 14 ] = 384'h003E7C07FFFFFFF8000001C003E00000000000000000000000000003C0000000000F000000003C0007FFFFFDFFFFFF80;
char_line[ 15 ] = 384'h003E7C03EC006000000001E003C00000000000000000000000000003C0000000000F000000003C0003FFFFFEFFFFFFC0;
char_line[ 16 ] = 384'h003E7C000F007800000000E007800000000000000000000000000003C0000000000F000000003C0001803C0001F80000;
char_line[ 17 ] = 384'h003E7C601FC07E00000000E007000000000000000000000000000003C0000000000FFFFFFFFFFC0000007C0001FC0000;
char_line[ 18 ] = 384'h0F3E7CF01F807E00000000E00E000200000000000000000000000003C0000000000FFFFFFFFFFC0000007C0003F40000;
char_line[ 19 ] = 384'h0FFFFFF81F00FC00000000E00C000700000000000000000000000003C0000000000E000000003C000000FF8003F60000;
char_line[ 20 ] = 384'h0FFFFFF81F00F8000000000018000F80000002000000000000000003C0000000000E000000003E000000FDF007F30000;
char_line[ 21 ] = 384'h0FBE7DF03E00F8000FFFFFFFFFFFFFC0000001800000000000000003C0000000000E0000000030000001FCF80FF38000;
char_line[ 22 ] = 384'h0FBE7DF03E01F00007FFFFFFFFFFFFE0000000C00000000000000003C0000000000E0000000000000003FC7C0EF1C000;
char_line[ 23 ] = 384'h0FBE7DF03E01F8000300000000000000000000700000000000000003C0000000000E0000000000000003FC7C1EF1E000;
char_line[ 24 ] = 384'h0FBE7DF07F83FC0000000000000000000000007C0000000000000003C0000000000E0000000000000007BC3C3CF0F000;
char_line[ 25 ] = 384'h0FBE7DF07BE3FF0000000000000000000000003E0000000000000003C0000180000E000000000000000F3C1838F07C00;
char_line[ 26 ] = 384'h0FBE7DF07BF7CFC000030000000700000000001F8000000000000003C00003C0000E000000003000001E3C1870F03F00;
char_line[ 27 ] = 384'h0FBE7DF0F1F787E00003FFFFFFFF80000000000FC000000000000003C00007E0000E000000007800001C3C00E0F03FC0;
char_line[ 28 ] = 384'h0FBE7DF0F1FF83E00003FFFFFFFFC00000000007F00000003FFFFFFFFFFFFFF0000E07FFFFFFFC0000383C01C0F01FF8;
char_line[ 29 ] = 384'h0FBC7DF1E0FF03F00003C0000007000000000003F80000001FFFFFFFFFFFFFF8000E03FFFFFFFE0000703C0300F007E0;
char_line[ 30 ] = 384'h0FBC7DF1E0FE01F00003C0000007000000000001FC0000000C000003C0000000000E01000000000000E03C0600F00300;
char_line[ 31 ] = 384'h0FBC7DF3C07C01F00003C0000007000000000000FE00000000000003C0000000001E00000000000001803C2800F00100;
char_line[ 32 ] = 384'h0FBC7DF3807800E00003C0000007000000000000FE00000000000003C0000000001E00000000000007003C3000F00000;
char_line[ 33 ] = 384'h0FBC7DF7007000C00003FFFFFFFF0000000000007F00000000000003C0000000001E0000000000000C003C7800F00000;
char_line[ 34 ] = 384'h0FF87DF700FC00000003FFFFFFFF0000000000003F00000000000003C0000000001E00000000000018003C7E00E00000;
char_line[ 35 ] = 384'h0FF87FFE01FF00000003C00000070000000000003F00000000000003C0000000001E000000000100000030FC00808000;
char_line[ 36 ] = 384'h0FF83FFC013F00000003C00000070000000000001F00000000000003C0000000001E000000000380000001F00001C000;
char_line[ 37 ] = 384'h0FF01FF0003E00000003C00000070000000000001F00000000000003C0000000001C0000000007C0000003FFFFFFE000;
char_line[ 38 ] = 384'h0FE001F0003E00C00003C00000070000000000000E00000000000003C0000000001CFFFFFFFFFFE0000003FFFFFFF000;
char_line[ 39 ] = 384'h0FE001F0003E01E00003C00000070000000000000400000000000003C0000000001C7FFFFFFFFFF0000007800003F800;
char_line[ 40 ] = 384'h0FC001F0003E03F00003FFFFFFFF0000000000000000000000000003C0000000001C20006000000000000F000003E000;
char_line[ 41 ] = 384'h0F8001FFFFFFFFF80003FFFFFFFF0000000000000000000000000003C0000000003C00007000000000001E000007C000;
char_line[ 42 ] = 384'h0F8001FFFFFFFFFC0003C02000070000000000000000000000000003C0000000003C0000FC00000000003C00000F8000;
char_line[ 43 ] = 384'h0FFFFFF7C03E00000003801800060000000000000000000000000003C000000000380000FC00000000007E00001F0000;
char_line[ 44 ] = 384'h0FFFFFF0003E00000000000E00000000000000000000000000000003C000000000380001F80000000000E780003E0000;
char_line[ 45 ] = 384'h0F8001F0003E00000000100780000000000000000000000000000003C000000000380001E00000000001C3C0003E0000;
char_line[ 46 ] = 384'h0F8001F0003E000000001C07C0018000000000000000000000000003C000000000780003C0000000000781F0007C0000;
char_line[ 47 ] = 384'h0F8001F0003E000000081F03E000E000000000000000000000000003C00000000070000780000000000E00F800F80000;
char_line[ 48 ] = 384'h0F8001F0003E000000181E01E0007800000000000000000000000003C00000000070000700180000001C007803F00000;
char_line[ 49 ] = 384'h0F8001F0003E000000181C00E0183E00000000000000000000000003C00000000070000E000C00000070007807E00000;
char_line[ 50 ] = 384'h0F8001F0003E000000181C00E0181F00000000000000000000000003C000000000E0001C0007000000C000380F800000;
char_line[ 51 ] = 384'h0F8001F0003E000000381C0060180F80000000000000000000000003C000000000E0003800038000010000381F000000;
char_line[ 52 ] = 384'h0F8001F0003E000000381C00401807C0000000000000000000000003C000000000C000700001E000000000187E000000;
char_line[ 53 ] = 384'h0FFFFFF0003E000000701C00001807C0000000000000000000000003C000000001C000600001F00000000010F8000000;
char_line[ 54 ] = 384'h0FFFFFF0003E000000F01C00001803C0000000000000000000000003C0000000018001C00000F80000000003F0000000;
char_line[ 55 ] = 384'h0F8001F0003E000003F01C00001803C0000000000000000000000003C00000000380038000007C000000000FC0000000;
char_line[ 56 ] = 384'h0F8001F0003E000003E01E00003C0180000000000000000000000003C000000003000700FFFFFE000000003F00000000;
char_line[ 57 ] = 384'h0F8001F0003E000007E01FFFFFFE0000000000000000000000000003C000000006001FFFFFF03E00000001FC00000000;
char_line[ 58 ] = 384'h0F8001F0003E000003800FFFFFFC0000000000000000000000000003C000000006000FFFE0001E0000000FF000000000;
char_line[ 59 ] = 384'h0F8001E0003E0000000007FFFFF00000000000000000000000000003C00000000C000FF800001E000000FF8000000000;
char_line[ 60 ] = 384'h0F000000003C00000000000000000000000000000000000000000003800000000800070000000E00000FF80000000000;
char_line[ 61 ] = 384'h00000000003800000000000000000000000000000000000000000002000000001800040000000C0001FF000000000000;
char_line[ 62 ] = 384'h000000000000000000000000000000000000000000000000000000000000000010000000000000000F80000000000000;
char_line[ 63 ] = 384'h000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000;
char_line[ 64 ] = 384'h000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000;
end
end
//实例化ROM
rom rom_inst (
.address ( rom_address ),
.clock ( vga_clk ),
.q ( rom_data )
);
endmodule // data_drive
效果图：
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