友晶科技FPGA开发板实现贪吃蛇游戏（五）VGA 驱动模块字符显示 DE10-STANDARD、DE1-SOC、DE2-115

一、界面效果

在游戏开始显示了这个界面：

二、原理分析

首先要设计一个Memory，存放“请选择难度” 对应的字符点阵。

字符点阵是VGA屏幕显示字符时对字符进行数字化的第一步，即把字符中着色部分和非着色部分以1和0表示，最后生成字节码的过程。只有生成了数字化的点阵，才可以在这些屏幕上进行显示。

三、点阵获取

生成的字符点阵如下：

我们将这个字节码存储到设计的Memory里面去:

reg     [159:0] char    [31:0]  ;   //字符宽160 ，高32
  
//字符“请选择难度”
always@(posedge clk)
    begin
        char[0]     <=  160'h0000000000000000000000000000000000000000;
        char[1]     <=  160'h0000000000000000000000000000000000000000; 
        char[2]     <=  160'h00003c000000380001c000000000ee000003c000; 
        char[3]     <=  160'h0e003c000c063c0001e000f00000ff000003e000; 
        char[4]     <=  160'h0f003c180f07b80001cffff80000f7800001e038;
        char[5]     <=  160'h07803c3c0787b80001c7c0f00000f7800e00e07c; 
        char[6]     <=  160'h07bffffc078738c001c0c1e0003de3980ffffffe; 
        char[7]     <=  160'h079c3c60078f39e001c0e3c03fffe33c0f0e0700; 
        char[8]     <=  160'h07003cf0038ffff001de77c01c3dfffc0f0f0780; 
        char[9]     <=  160'h000ffff8030e38007fff7f800039c7000f0e0730; 
        char[10]     <=  160'h00073c00001c380039c03f00303bc7000f0e0778;
        char[11]     <=  160'h07003c18001c380001c03f00387bc7000ffffffc; 
        char[12]     <=  160'hff803c3c03b8383001c07fc01c7fc7300fce0700; 
        char[13]     <=  160'h77fffffe7ff0387801dffffe0e77c7780f0e0700; 
        char[14]     <=  160'h0738000077fffffc01ffdffe0f7ffffc0f0e0700; 
        char[15]     <=  160'h070600e007b9ce0001ff9e7807ffc7000f0e0700; 
        char[16]     <=  160'h0707fff00781ce0007fc1c3003fdc7000e0fff00; 
        char[17]     <=  160'h070700f00781ce003fc01c7801f9c7000e0e0700; 
        char[18]     <=  160'h070700e00781ce007fcffffc01e1c7000e0c0380; 
        char[19]     <=  160'h070700e00783ce187dc71c0003f1c7300e7fffc0; 
        char[20]     <=  160'h071fffe007838e1831c01c0003f1c7780e3e07c0; 
        char[21]     <=  160'h073f00e007878e1801c01c1807f9fffc0e070f80;
        char[22]     <=  160'h077700e007870e1801c01c3c0739c7001e078f00; 
        char[23]     <=  160'h07e7ffe0078f0e3c01dffffe0e3dc7001c03de00; 
        char[24]     <=  160'h07e700e00f9e0ffc01de1c001e3dc7001c01fc00; 
        char[25]     <=  160'h07c700e03ff80ffc01c01c003c19c7181c00f800; 
        char[26]     <=  160'h078700e07cf0000001c01c007819c73c3801fc00; 
        char[27]     <=  160'h070700e0f87fc0ff3fc01c00f001fffe3807ffc0; 
        char[28]     <=  160'h03070fe0701ffffe3fc01c00c001c000703f0ffe; 
        char[29]     <=  160'h000703e00007fff807c01c000001c00071fc03fe; 
        char[30]     <=  160'h000701c00000000003801c000001c000e7e00078; 
        char[31]     <=  160'h0000000000000000000000000000000000000000;
    end