[分享] 【SoC 6 BLE原型开发板】+点阵模块显示驱动

前面介绍过程序数码管的显示驱动，它所使用的芯片是MAX7219。其实该芯片不仅是用在串行数码管模块，它还可以用在点阵模块上。

图1是点阵模块，它的用法与串行数码管模块十分相近，只是在初始化和显示处理方面有所区别。

 

图1点阵模块

 

点阵模块的初始化函数为：

void Init_MAX7219_D(void)
{
   Write_Max7219(0x0b, 0x07);
   Write_Max7219(0x0c, 0x01);
   Write_Max7219(0x0f, 0x00);
}

由于点阵模块在显示时，需要字模的支持，故需为其配置相应的字库，其结构如下：

unsignedchar disp[38][8]={

{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//0

{0x10,0x30,0x50,0x10,0x10,0x10,0x10,0x10},//1

{0x7E,0x2,0x2,0x7E,0x40,0x40,0x40,0x7E},//2

{0x3E,0x2,0x2,0x3E,0x2,0x2,0x3E,0x0},//3

{0x8,0x18,0x28,0x48,0xFE,0x8,0x8,0x8},//4

{0x3C,0x20,0x20,0x3C,0x4,0x4,0x3C,0x0},//5

{0x3C,0x20,0x20,0x3C,0x24,0x24,0x3C,0x0},//6

{0x3E,0x22,0x4,0x8,0x8,0x8,0x8,0x8},//7

{0x0,0x3E,0x22,0x22,0x3E,0x22,0x22,0x3E},//8

{0x3E,0x22,0x22,0x3E,0x2,0x2,0x2,0x3E},//9

{0x8,0x14,0x22,0x3E,0x22,0x22,0x22,0x22},//A

{0x3C,0x22,0x22,0x3E,0x22,0x22,0x3C,0x0},//B

{0x3C,0x40,0x40,0x40,0x40,0x40,0x3C,0x0},//C

...

{0x0,0x41,0x22,0x14,0x8,0x14,0x22,0x41},//X

{0x41,0x22,0x14,0x8,0x8,0x8,0x8,0x8},//Y

{0x0,0x7F,0x2,0x4,0x8,0x10,0x20,0x7F},//Z

{0x8,0x7F,0x49,0x49,0x7F,0x8,0x8,0x8},//zhong

{0xFE,0xBA,0x92,0xBA,0x92,0x9A,0xBA,0xFE},//guo

};

实现显示测试的程序为：

    Init_MAX7219_D();
    while(1)
    {
       for(j=0;j<38;j++)
       {
          for(i=1;i<9;i++)
          {
             Write_Max7219(i,disp[j][i-1]);
             for(k=1;k<65;k++)
             {
                delay_n(65);
             }
          }
          for(k=1;k<650;k++)
          {
                delay_n(65);
          }
       }
    }

经程序的编译和下载，其显示效果如图2所示。

 

图2 显示效果

 

演示视频：