#include <LedControl.h>

//定义MAX7219的引脚
int DIN = 11;
int CS = 10;
int CLK = 13;

LedControl lc = LedControl(DIN, CLK, CS, 1);

//定义微笑表情的位图
byte smiley[8] = {
  B00000000,
  B00000000,
  B01100110,
  B01100110,
  B00000000,
  B01000010,
  B00111100,
  B00000000
};

void setup() {
  //初始化MAX7219
  lc.shutdown(0, false);
  lc.setIntensity(0, 8);
  lc.clearDisplay(0);
}

void loop() {
  //显示微笑表情
  for (int row = 0; row < 8; row++) {
    lc.setRow(0, row, smiley[row]);
  }
  delay(2000);
  
  //清空LED点阵
  lc.clearDisplay(0);
  delay(1000);
}