1

我正在使用带有低功耗蓝牙的 Arduino UNO和PN532 RFID/NFC Shield。

我遇到了一个问题，即我的草图中的循环没有循环，除非至少检测到一张卡，并通过修改 RFID 屏蔽readPassiveTargetID()功能的库来解决这个问题（将 while 循环更改为 if 语句，所以它没有卡住）。

现在的问题是，除非存在两个，否则它似乎无法读取任何标签的标签 ID。

我的素描

#include <SPI.h>
#include "Adafruit_BLE_UART.h"
#include <Wire.h>
#include <Adafruit_NFCShield_I2C.h>

#define IRQ   (7)
#define IRQ2   (4)
#define RESET (3)  // Not connected by default on the NFC Shield

Adafruit_NFCShield_I2C nfc(IRQ, RESET);
//Adafruit_NFCShield_I2C nfc2(IRQ2, RESET);

// Connect CLK/MISO/MOSI to hardware SPI
// e.g. On UNO & compatible: CLK = 13, MISO = 12, MOSI = 11
#define ADAFRUITBLE_REQ 10
#define ADAFRUITBLE_RDY 3     // This should be an interrupt pin, on Uno thats #2 or #3
#define ADAFRUITBLE_RST 9

Adafruit_BLE_UART BTLEserial = Adafruit_BLE_UART(ADAFRUITBLE_REQ, ADAFRUITBLE_RDY, ADAFRUITBLE_RST);


uint8_t numChecks = 0;

String items[]= {"","","","","","","",""};

String lastList="";

/**************************************************************************/
/*!
 Configure the Arduino and start advertising with the radio
 */
/**************************************************************************/
void setup(void)
{ 

  Serial.begin(115200);


  //while(!Serial);
  startNFC();
  BTLEserial.begin();

  //startNFC(); 


  //while(!Serial); // Leonardo/Micro should wait for serial init



}

/**************************************************************************/
/*!
 Constantly checks for new events on the nRF8001
 */
/**************************************************************************/
aci_evt_opcode_t laststatus = ACI_EVT_DISCONNECTED;

void loop()
{
  //Serial.println("--------------------Loop begin-------------------");

  // Tell the nRF8001 to do whatever it should be working on.
  BTLEserial.pollACI();

  // Ask what is our current status
  aci_evt_opcode_t status = BTLEserial.getState();
  // If the status changed....
  if (status != laststatus) {
    // print it out!
    if (status == ACI_EVT_DEVICE_STARTED) {
      Serial.println(F("* Advertising started"));
    }
    if (status == ACI_EVT_CONNECTED) {
      Serial.println(F("* Connected!"));
      BTLEserial.print("Goodmorning");
    }
    if (status == ACI_EVT_DISCONNECTED) {
      Serial.println(F("* Disconnected or advertising timed out"));
    }
    // OK set the last status change to this one
    laststatus = status;
  }

  if(status == ACI_EVT_CONNECTED){
    if(numChecks<7){
      numChecks++;
    }
    else{
      updatePhone();
      numChecks =0;
    }


    uint8_t success;
    uint8_t uid[] = {0, 0, 0, 0, 0, 0, 0};  // Buffer to store the returned UID
    uint8_t uidLength;                        // Length of the UID (4 or 7 bytes depending on ISO14443A card type)

    Serial.println("CHECK #");Serial.print(numChecks,DEC);
    // Wait for an ISO14443A type cards (Mifare, etc.).  When one is found
    // 'uid' will be populated with the UID, and uidLength will indicate
    // if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
    success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);

    items[numChecks] ="";
    Serial.println("----------SCANNING------");
    if (success) {
      Serial.println("Found one!");
      // Display some basic information about the card
      // Serial.println("Found an ISO14443A card");
      // Serial.print("  UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
      // Serial.print("  UID Value: ");
      String uidChar ="";

      for ( int i = 0; i < 7; i++ ) {
        uidChar += "x";
        uidChar +=  uid[i];

       }
       Serial.println("ID:"+uidChar);
      //Serial.println(uidChar);
      if(!itemAlreadyExists(uidChar)){
        Serial.println("Its New");

        items[numChecks] = uidChar;
      }

    }
    else{
      Serial.println("No Card found");
    }


 }

}

// Serial.println("************************Loop END*********************");


boolean itemAlreadyExists(String id){
  boolean result = false;
  for(int i=0; i<7; i++){
    String s = items[i];
    if(id.equals(s)){
      result = true;
    }
  }

  return result;
}



void startNFC(){
  nfc.begin();

  uint32_t versiondata = nfc.getFirmwareVersion();
  if (! versiondata) {
    Serial.print("Didn't find PN53x board");
    //while (1); // halt
  }
  else{
    Serial.print("FOUND PN53x board");
  }

  nfc.SAMConfig(); 
}

void updatePhone(){

  String itemsList ="";


  for(int i = 0; i<8;i++){
    String s = items[i];
    Serial.println("handling::"+s);

    if(!s.equals("")){
      Serial.println("NOT EMPTY");

      if(itemsList.length()>0){
        itemsList +=",";
      };

      itemsList += s;


    }
    else{
      Serial.println("STRING EMPTY");

    }
  }



  if(itemsList.length()>0){
    Serial.println(itemsList); 

  }
  else{
    Serial.println("EMPTY");
  }

  numChecks = 0;
     items[0]="";
      items[1]="";
      items[2]="";
      items[3]="";
      items[4]="";
      items[5]="";
      items[6]="";
      items[7]="";
    delay(5000);

}

我没有卡的串行输出：

FOUND PN53x board* Advertising started
* Connected!
    Writing out to BTLE: 0x47 0x6F 0x6F 0x64 0x6D 0x6F 0x72 0x6E 0x69 0x6E 0x67
CHECK #
1----------SCANNING------
No Card found
CHECK #
2----------SCANNING------
No Card found
CHECK #
3----------SCANNING------
No Card found
CHECK #
4----------SCANNING------
No Card found
CHECK #
5----------SCANNING------
No Card found
CHECK #
6----------SCANNING------
No Card found
CHECK #
7----------SCANNING------
No Card found
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
EMPTY

一张卡

CHECK #
0----------SCANNING------
No Card found
CHECK #
1----------SCANNING------
No Card found
CHECK #
2----------SCANNING------
No Card found
CHECK #
3----------SCANNING------
No Card found
CHECK #
4----------SCANNING------
No Card found
CHECK #
5----------SCANNING------
No Card found
CHECK #
6----------SCANNING------
No Card found
CHECK #
7----------SCANNING------
No Card found
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
EMPTY

有两张卡

CHECK #
2----------SCANNING------
Found one!
ID:x19x153x28x212x0x0x0
Its New
CHECK #
3----------SCANNING------
Found one!
ID:x19x52x39x212x0x0x0
Its New
CHECK #
4----------SCANNING------
Found one!
ID:x19x153x28x212x0x0x0
CHECK #
5----------SCANNING------
Found one!
ID:x19x52x39x212x0x0x0
CHECK #
6----------SCANNING------
Found one!
ID:x19x153x28x212x0x0x0
CHECK #
7----------SCANNING------
Found one!
ID:x19x52x39x212x0x0x0
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::x19x153x28x212x0x0x0
NOT EMPTY
handling::x19x52x39x212x0x0x0
NOT EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
handling::
STRING EMPTY
x19x153x28x212x0x0x0,x19x52x39x212x0x0x0

这就是说，如果我把两张卡留在那里，它们最终会消失吗？？

有什么想法有什么问题吗？

4

1 回答 1

1

我将Seeed-Studio PN532 驱动程序与我的 Adafruit NFC 防护罩一起使用。

Seeed-Studio 版本不会阻塞，您可以选择设置超时。

我的NDEF 库具有更高级别的 Tag 对象抽象，您可能会发现它对读取 NFC 标签很有用。简单的例子。扩展示例。

if (nfc.tagPresent()){
  NfcTag tag = nfc.read();
  Serial.println(tag.getTagType());
  Serial.print("UID: ");Serial.println(tag.getUidString());
}
于 2014-09-04T19:43:04.880 回答