UNO完整版代码

最新推荐文章于 2023-05-16 17:43:04 发布

Sonny船长

最新推荐文章于 2023-05-16 17:43:04 发布

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CC 4.0 BY-SA版权

分类专栏： Arduino

本文链接：https://blog.youkuaiyun.com/Tony6666_/article/details/97621742


#include <LiquidCrystal.h>
#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN 9

MFRC522 mfrc522(SDA, RST_PIN);   // 创建MFRC实例
// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 7, en = 6, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print a message to the LCD.
  pinMode(8,OUTPUT);
  Serial.begin(9600);   // Initiate a serial communication
  SPI.begin();      // Initiate  SPI bus
  mfrc522.PCD_Init();   // Initiate MFRC522
  Serial.println("系统开启,请将你的卡片放置感应区...");

  
}

void loop() {
  String content= "";
  lcd.setCursor(0,0);
  lcd.print("Welcome!");
  lcd.print(content);
  // 寻找新卡
  if ( ! mfrc522.PICC_IsNewCardPresent()) 
  {
    return;
  }
  // Select one of the cards
  if ( ! mfrc522.PICC_ReadCardSerial()) 
  {
    return;
  }
  //显示卡号