const int dataPin = 9;    // 数据引脚 (DS)
const int clockPin = 10;   // 时钟引脚 (SH_CP)
const int latchPin = 11;    // 锁存引脚 (ST_CP)
const byte disNum[11] = {
  // 数码管各段状态定义（共阴极：1=亮，0=灭）
  //  abcdefgdp  
  0b11111100, //0
  0b01100000, //1
  0b11011010, //2
  0b11110010, //3
  0b01100110, //4
  0b10110110, //5
  0b10111110, //6
  0b11100000, //7
  0b11111110, //8
  0b11110110, //9
  0b00000001  //.
};

void setup() {
  // put your setup code here, to run once:
  pinMode(dataPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(latchPin, OUTPUT);
  byte duan = 0b10110110;//5  //0表示选中
  byte wei = 0b00000010;//位  1表示选中
  digitalWrite(clockPin, LOW);
  digitalWrite(latchPin, LOW);
}
void disPlayNumber(int n) { //1234
  byte wei = 0b00000001;

  while (n != 0) {
    shiftOut(dataPin, clockPin, MSBFIRST, wei);
    shiftOut(dataPin, clockPin, LSBFIRST, ~disNum[n%10]);
    digitalWrite(latchPin, LOW);         // 开始传输
    digitalWrite(latchPin, HIGH);        // 锁存数据
    wei = (wei<<1);
    n/=10;
    delay(2);//可以不写 1~2
  }

}
void loop() {
  // put your main code here, to run repeatedly:
  disPlayNumber(1234);
}