21.点阵实验

实验现象：

  利用8*8点阵显示出心跳动画。

理论学习：

  本套件配备点阵为共阳点阵（行控制为LED阳极）。代码仅适用于共阳点阵。

  共阳共阴的区分就是看第一个引脚的极性。

  有字的那一面，左边第一个就是引脚1

  共阳点阵的引脚图。


程序代码：

#define H1 2 //1088BX 行是阳极#define H2 7#define H3 A5#define H4 5#define H5 13#define H6 A4#define H7 12#define H8 A2 #define L1 6#define L2 11#define L3 10#define L4 3#define L5 A3#define L6 4#define L7 8#define L8 9 unsigned char table1[8][8] =        //大“心型”的数据{  0,0,0,0,0,0,0,0,  0,1,1,0,0,1,1,0,  1,1,1,1,1,1,1,1,  1,1,1,1,1,1,1,1,  1,1,1,1,1,1,1,1,  0,1,1,1,1,1,1,0,  0,0,1,1,1,1,0,0,  0,0,0,1,1,0,0,0,}; unsigned char table2[8][8] =        //小“心型”的数据{  0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,  0,0,1,0,0,1,0,0,  0,1,1,1,1,1,1,0,  0,1,1,1,1,1,1,0,  0,0,1,1,1,1,0,0,  0,0,0,1,1,0,0,0,  0,0,0,0,0,0,0,0,}; void setup(){  pinMode(H1,OUTPUT); //1088BX 行是阳极  pinMode(H2,OUTPUT);  pinMode(H3,OUTPUT);  pinMode(H4,OUTPUT);  pinMode(H5,OUTPUT);  pinMode(H6,OUTPUT);  pinMode(H7,OUTPUT);  pinMode(H8,OUTPUT);     pinMode(L1,OUTPUT);  pinMode(L2,OUTPUT);  pinMode(L3,OUTPUT);  pinMode(L4,OUTPUT);  pinMode(L5,OUTPUT);  pinMode(L6,OUTPUT);  pinMode(L7,OUTPUT);  pinMode(L8,OUTPUT);} void loop(){  for(int i = 0 ; i < 100 ; i++)     //循环显示100次  {    Display(table1);                //显示大”心形“  }  for(int i = 0 ; i < 50 ; i++)          //循环显示50次  {        Display(table2);                //显示小“心形”  }} void Display(unsigned char dat[8][8])       //显示函数{  digitalWrite(L1,LOW);             //选通第一列  digitalWrite(H1,dat[0][0]);  digitalWrite(H2,dat[1][0]);  digitalWrite(H3,dat[2][0]);  digitalWrite(H4,dat[3][0]);  digitalWrite(H5,dat[4][0]);  digitalWrite(H6,dat[5][0]);  digitalWrite(H7,dat[6][0]);  digitalWrite(H8,dat[7][0]);  delay(1); //延时一小段时间，等待LED被点亮  Clear();  //清空显示去除余晖     digitalWrite(L2,LOW);             //选通第二列  digitalWrite(H1,dat[0][1]);  digitalWrite(H2,dat[1][1]);  digitalWrite(H3,dat[2][1]);  digitalWrite(H4,dat[3][1]);  digitalWrite(H5,dat[4][1]);  digitalWrite(H6,dat[5][1]);  digitalWrite(H7,dat[6][1]);  digitalWrite(H8,dat[7][1]);  delay(1);  Clear();     digitalWrite(L3,LOW);             //选通第三列  digitalWrite(H1,dat[0][2]);  digitalWrite(H2,dat[1][2]);  digitalWrite(H3,dat[2][2]);  digitalWrite(H4,dat[3][2]);  digitalWrite(H5,dat[4][2]);  digitalWrite(H6,dat[5][2]);  digitalWrite(H7,dat[6][2]);  digitalWrite(H8,dat[7][2]);  delay(1);  Clear();     digitalWrite(L4,LOW);             //选通第四列  digitalWrite(H1,dat[0][3]);  digitalWrite(H2,dat[1][3]);  digitalWrite(H3,dat[2][3]);  digitalWrite(H4,dat[3][3]);  digitalWrite(H5,dat[4][3]);  digitalWrite(H6,dat[5][3]);  digitalWrite(H7,dat[6][3]);  digitalWrite(H8,dat[7][3]);  delay(1);  Clear();     digitalWrite(L5,LOW);             //选通第五列  digitalWrite(H1,dat[0][4]);  digitalWrite(H2,dat[1][4]);  digitalWrite(H3,dat[2][4]);  digitalWrite(H4,dat[3][4]);  digitalWrite(H5,dat[4][4]);  digitalWrite(H6,dat[5][4]);  digitalWrite(H7,dat[6][4]);  digitalWrite(H8,dat[7][4]);  delay(1);  Clear();     digitalWrite(L6,LOW);             //选通第六列  digitalWrite(H1,dat[0][5]);  digitalWrite(H2,dat[1][5]);  digitalWrite(H3,dat[2][5]);  digitalWrite(H4,dat[3][5]);  digitalWrite(H5,dat[4][5]);  digitalWrite(H6,dat[5][5]);  digitalWrite(H7,dat[6][5]);  digitalWrite(H8,dat[7][5]);  delay(1);  Clear();     digitalWrite(L7,LOW);             //选通第七列  digitalWrite(H1,dat[0][6]);  digitalWrite(H2,dat[1][6]);  digitalWrite(H3,dat[2][6]);  digitalWrite(H4,dat[3][6]);  digitalWrite(H5,dat[4][6]);  digitalWrite(H6,dat[5][6]);  digitalWrite(H7,dat[6][6]);  digitalWrite(H8,dat[7][6]);  delay(1);  Clear();     digitalWrite(L8,LOW);             //选通第八列  digitalWrite(H1,dat[0][7]);  digitalWrite(H2,dat[1][7]);  digitalWrite(H3,dat[2][7]);  digitalWrite(H4,dat[3][7]);  digitalWrite(H5,dat[4][7]);  digitalWrite(H6,dat[5][7]);  digitalWrite(H7,dat[6][7]);  digitalWrite(H8,dat[7][7]);  delay(1);   Clear();} void Clear()                    //清空显示{  digitalWrite(H1,LOW);  digitalWrite(H2,LOW);  digitalWrite(H3,LOW);  digitalWrite(H4,LOW);  digitalWrite(H5,LOW);  digitalWrite(H6,LOW);  digitalWrite(H7,LOW);  digitalWrite(H8,LOW);     digitalWrite(L1,HIGH);  digitalWrite(L2,HIGH);  digitalWrite(L3,HIGH);  digitalWrite(L4,HIGH);  digitalWrite(L5,HIGH);  digitalWrite(L6,HIGH);  digitalWrite(L7,HIGH);  digitalWrite(L8,HIGH);}