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

该点阵为共阳点阵，行控制LED阳极

原理图

注意：模拟I/O口不仅仅是模拟I/O的功能，同时它也具备了数字I/O口的功能，所有的I/O都有数字I/O的功能，但是模拟I/O口在这个基础之上有了模拟I/O口的功能

代码编写

#define h1 2
#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
//大心脏的显示
unsigned char table1[8][8] = {
	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,
};
//小心脏的显示
unsigned char table2[8][8] = {
	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);
	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 display(unsigned char dat[8][8]) {
	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() {
	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);
}
void loop()
{
	//显示第一副图
	for (int i = 0; i < 100; i++) {
		display(table1);
	}
	//显示第二幅图
	for (int i = 0; i < 50; i++) {
		display(table2);
	}
}