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问Arduino不向WinForms应用程序发送数据
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Stack Overflow用户

提问于 2021-01-05 19:49:51

回答 1查看 57关注 0票数 1

我有一个Arduino Leonardo，它有一个程序，它监听串行端口并执行发送给它的命令。Arduino设备是一个RFID读取器。

我写了一个WinForms应用程序，它与RFID阅读器通信以验证用户身份。Arduino可以正常接收数据，但不发送任何内容。即使是电路板上的发送二极管也不亮。

我用另一台PC串行显示器测试了我的阅读器，它工作得很好，所以问题出在我的应用程序上。波特率为9600，数据位为8，奇偶校验为none。握手可能无关紧要，因为串行监视器可以与任何握手一起工作。

我做错了什么？另一件奇怪的事是，当我通过RS232将装有我的应用程序的PC连接到另一台装有串行显示器的PC时，我模拟了我的阅读器，一切都正常工作。那么，为什么只有我的应用程序和Arduino不能工作，而所有其他组合都能工作呢？

Arduino设备是唯一的Arduino + MFRC522阅读器。

应用程序代码：

        public static Status Authenticate(Key key, Passsword passwd, UID uid, string port)
        {
            SerialPort serial = new SerialPort(port, 9600, Parity.None, 8, StopBits.One);
            serial.Handshake = Handshake.None;

            serial.Open();

            byte[] cmd = { 1 };

            serial.Write(cmd, 0, 1); //Send command

            if (serial.ReadLine() != "START") //Device is ready
            { serial.Close(); return Status.Err; }

            if (serial.ReadLine() != "KEY") //Device requires key
            { serial.Close(); return Status.Err; }

            serial.Write(key.ToArray(), 0, 6); //Send key

            if (serial.ReadLine() != "PASSWD") //Device requires password
            { serial.Close(); return Status.Err; }

            serial.Write(passwd.ToArray(), 0, 16); //Send password

            if (serial.ReadLine() != "UID") //Device requires card UID
            { serial.Close(); return Status.Err; }

            serial.Write(uid.ToArray(), 0, 4); //Send UID

            if (serial.ReadLine() != "WAIT-CARD") //Wait
            { serial.Close(); return Status.Err; }

            if (serial.ReadLine() != "CARD-PRESENT") //User presented card
            { serial.Close(); return Status.Err; }

            string stat = serial.ReadLine(); //Receive authorization status

            serial.Close();

            switch (stat) //Check status
            {
                case "OK": return Status.OK;
                case "ERR-PASS": return Status.Inc_passwd;
                case "ERR-UID": return Status.Inc_uid;
                case "ERR-KEY": return Status.Inc_key;
                default: return Status.Err;
            }

完整的Arduino代码：

#include <MFRC522.h>
#include <SPI.h>
#include <EEPROM.h>

#define SECTORS_14

// ----------------------------------------------------------------------------------------------------

#ifdef SECTORS_15
const byte permittedBlocks[] = {8, 9, 10, 12, 13, 14, 16, 17, 18, 20, 21, 22, 24, 25, 26, 28, 29, 30, 32, 33,
  34, 36, 37, 38, 40, 41, 42, 44, 45, 46, 48, 49, 50, 52, 53, 54, 56, 57, 58, 60, 61, 62};
#endif

#ifdef SECTORS_14
const byte permittedBlocks[] = {8, 9, 10, 12, 13, 14, 16, 17, 18, 20, 21, 22, 24, 25, 26, 28, 29, 30, 32, 33,
  34, 36, 37, 38, 40, 41, 42, 44, 45, 46, 48, 49, 50, 52, 53, 54, 56, 57, 58};
#endif

typedef struct codes
{
  byte uid[4];
  byte passwd[16];
  MFRC522::MIFARE_Key key;
} personalData;

void setup() 
{
  Serial.begin(9600);
  SPI.begin();
  delay(1000);
}

void loop() 
{
  byte cmd;
  
  while (!Serial.available());
  cmd = Serial.read();

  switch (cmd)
  {
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    case 1:
    {
      digitalWrite(13, HIGH);
      Serial.println("START");
      
      personalData personal = RFID_GetPersonalData();
      
      MFRC522 rfid(10, 9);
      rfid.PCD_Init();

      if (RFID_WaitForCard(&rfid, personal)) return;

      Serial.println("OK");
      rfid.PICC_HaltA();
      rfid.PCD_StopCrypto1();
      
      break;
    }
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    case 2:
    {
      Serial.println("START");
      
      personalData personal = RFID_GetPersonalData();
      
      Serial.println("NEW-PASSWD");

      byte newPasswd[16];
      getArray(newPasswd, 16);

      MFRC522 rfid(10, 9);
      rfid.PCD_Init();

      if (RFID_WaitForCard(&rfid, personal)) return;

      Serial.println("CHANGING");

      byte ok = RFID_ChangePasswd(newPasswd, &rfid, personal.key);

      if (ok == 1)      {Serial.println("ERR-KEY");    return;}
      else if (ok == 2) {Serial.println("ERR-WRITE");    return;}

      Serial.println("OK");

      rfid.PICC_HaltA();
      rfid.PCD_StopCrypto1();
      
      break;
    }
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    case 3:
    {
      Serial.println("START");
      
      personalData personal = RFID_GetPersonalData();

      Serial.println("TO-WRITE");

      byte count[1];
      getArray(count, 1);

      byte blocks[count[0]][1];
      byte data[count[0]][16];

      for (byte i = 0; i < count[0]; i++)
      {
        Serial.println("BLOCK");

        getArray(blocks[i], 1);

        if (!isBlockPermitted(blocks[i][0])) {Serial.println("BLOCK-INVALID"); return;}

        Serial.println("DATA");

        getArray(data[i], 16);
      }
      

      MFRC522 rfid(10, 9);
      rfid.PCD_Init();

      if (RFID_WaitForCard(&rfid, personal)) return;

      Serial.println("WRITING");

      for (byte i = 0; i < count[0]; i++)
      {
        byte ok = RFID_WriteBlock(data[i], &rfid, personal.key, blocks[i][0]);

        if (ok == 1)      {Serial.println("ERR-KEY");    return;}
        else if (ok == 2) {Serial.println("ERR-WRITE");    return;}
      }
      
      Serial.println("OK");

      rfid.PICC_HaltA();
      rfid.PCD_StopCrypto1();
      
      break;
    }
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    case 4:
    {
      Serial.println("START");
      
      personalData personal = RFID_GetPersonalData();

      MFRC522 rfid(10, 9);
      rfid.PCD_Init();

      if (RFID_WaitForCard(&rfid, personal)) return;
      
      Serial.println("FORMATTING");

      byte ok = RFID_FormatCard(&rfid, personal.key);

      if (ok == 1)      {Serial.println("ERR-KEY");    return;}
      else if (ok == 2) {Serial.println("ERR-WRITE");    return;}

      Serial.println("OK");

      rfid.PICC_HaltA();
      rfid.PCD_StopCrypto1();
      
      break;
    }
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    case 5:
    {
      Serial.println("START");
      
      personalData personal = RFID_GetPersonalData();

      Serial.println("TO-READ");

      byte count[1];
      getArray(count, 1);

      byte blocks[count[0]][1];

      for (byte i = 0; i < count[0]; i++)
      {
        Serial.println("BLOCK");

        getArray(blocks[i], 1);

        if (!isBlockPermitted(blocks[i][0])) {Serial.println("BLOCK-INVALID"); return;}
      }

      MFRC522 rfid(10, 9);
      rfid.PCD_Init();

      if (RFID_WaitForCard(&rfid, personal)) return;

      Serial.println("READING");

      byte data[count[0]][16];
      for (byte i = 0; i < count[0]; i++)
      {
        byte ok = RFID_ReadBlock(data[i], &rfid, personal.key, blocks[i][0]);

        if (ok == 1)      {Serial.println("ERR-KEY");    return;}
        else if (ok == 2) {Serial.println("ERR-READ");    return;}
      }
      
      for (byte i = 0; i < count[0]; i++)
      {
        Serial.println("BLOCK-" + blocks[i][0]);
        for (byte i2 = 0; i2 < 16; i2++)
          Serial.println(data[i][i2]);
      }

      Serial.println("OK");

      rfid.PICC_HaltA();
      rfid.PCD_StopCrypto1();
      
      break;
    }
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    case 6:
    {
      Serial.println("START");
      
      personalData personal = RFID_GetPersonalData();

      Serial.println("TO-READ");

      byte countR[1];
      getArray(countR, 1);

      byte blocksR[countR[0]][1];

      for (byte i = 0; i < countR[0]; i++)
      {
        Serial.println("BLOCK");

        getArray(blocksR[i], 1);

        if (!isBlockPermitted(blocksR[i][0])) {Serial.println("BLOCK-INVALID"); return;}
      }

      Serial.println("TO-WRITE");

      byte countW[1];
      getArray(countW, 1);

      byte blocksW[countW[0]][1];
      byte dataW[countW[0]][16];

      for (byte i = 0; i < countW[0]; i++)
      {
        Serial.println("BLOCK");

        getArray(blocksW[i], 1);

        if (!isBlockPermitted(blocksW[i][0])) {Serial.println("BLOCK-INVALID"); return;}

        Serial.println("DATA");

        getArray(dataW[i], 16);
      }

      MFRC522 rfid(10, 9);
      rfid.PCD_Init();

      if (RFID_WaitForCard(&rfid, personal)) return;

      Serial.println("READING");

      byte dataR[countR[0]][16];
      for (byte i = 0; i < countR[0]; i++)
      {
        byte ok = RFID_ReadBlock(dataR[i], &rfid, personal.key, blocksR[i][0]);

        if (ok == 1)      {Serial.println("ERR-KEY");    return;}
        else if (ok == 2) {Serial.println("ERR-READ");    return;}
      }

      for (byte i = 0; i < countR[0]; i++)
      {
        Serial.println("BLOCK-" + blocksR[i][0]);
        for (byte i2 = 0; i2 < 16; i2++)
          Serial.println(dataR[i][i2]);
      }

      Serial.println("WRITING");

      for (byte i = 0; i < countW[0]; i++)
      {
        byte ok = RFID_WriteBlock(dataW[i], &rfid, personal.key, blocksW[i][0]);

        if (ok == 1)      {Serial.println("ERR-KEY");    return;}
        else if (ok == 2) {Serial.println("ERR-WRITE");    return;}
      }

      Serial.println("OK");

      rfid.PICC_HaltA();
      rfid.PCD_StopCrypto1();
      
      break;
    }
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    case 7:
    {
      Serial.println("START");
      Serial.println("TO-WRITE");

      byte count[1];
      getArray(count, 1);
      byte addr[count[0]][1];
      byte val[count[0]][1];

      for (byte i = 0; i < count[0]; i++)
      {
        Serial.println("ADDR");
        getArray(addr[i], 1);

        Serial.println("VAL");
        getArray(val[i], 1);
      }

      for (byte i = 0; i <count[0]; i++)
        EEPROM.put(addr[i][0], val[i][0]);

      Serial.println("OK");
    }
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    case 8:
    {
      Serial.println("START");
      Serial.println("TO-READ");

      byte count[1];
      getArray(count, 1);
      byte addr[count[0]][1];
      byte val[count[0]][1];

      for (byte i = 0; i < count[0]; i++)
      {
        Serial.println("ADDR");
        getArray(addr[i], 1);
      }

      for (byte i = 0; i <count[0]; i++)
      {
        EEPROM.get(addr[i][0], val[i][0]);
        Serial.print("READ-"); Serial.println(addr[i][0]);
        Serial.println(val[i][0]);
      }
      
      Serial.println("OK");
    }

    case 9:
    {
      Serial.println("START");
      Serial.println("TO-READ");

      byte countR[1];
      getArray(countR, 1);
      byte addrR[countR[0]][1];
      byte valR[countR[0]][1];

      for (byte i = 0; i < countR[0]; i++)
      {
        Serial.println("ADDR");
        getArray(addrR[i], 1);
      }

      Serial.println("TO-WRITE");

      byte countW[1];
      getArray(countW, 1);
      byte addrW[countW[0]][1];
      byte valW[countW[0]][1];

      for (byte i = 0; i < countW[0]; i++)
      {
        Serial.println("ADDR");
        getArray(addrW[i], 1);

        Serial.println("VAL");
        getArray(valW[i], 1);
      }

      for (byte i = 0; i <countR[0]; i++)
      {
        EEPROM.get(addrR[i][0], valR[i][0]);
        Serial.print("READ-"); Serial.println(addrR[i][0]);
        Serial.println(valR[i][0]);
      }

      for (byte i = 0; i <countW[0]; i++)
        EEPROM.put(addrW[i][0], valW[i][0]);
      
      Serial.println("OK");
    }
  }
}
// -----------------------------------------------------------------------------------------------------------
inline bool compareArray(byte a1[], byte a2[], byte aSize)
{
  for (byte i = 0; i < aSize; i++)
    if (a1[i] != a2[i]) return false;
  return true;
}
// -----------------------------------------------------------------------------------------------------------
inline void copyArray(byte a1[], byte a2[], byte aSize)
{
  for (byte i = 0; i < aSize; i++)
    a1[i] = a2[i];
}
// -----------------------------------------------------------------------------------------------------------
inline void getArray(byte a[], byte len)
{
  for (byte i = 0; i < len; i++)
  {
    while (!Serial.available());
    a[i] = Serial.read();
  }
}
// -----------------------------------------------------------------------------------------------------------
inline MFRC522::MIFARE_Key RFID_GetKey()
{
  MFRC522::MIFARE_Key key;
  byte rawKey[6];
  for (byte i = 0; i < 6; i++)
  {
    while (!Serial.available());
    rawKey[i] = Serial.read();
  }

  for (byte i = 0; i < 6; i++)
    key.keyByte[i] = rawKey[i];
  return key;
}
// -----------------------------------------------------------------------------------------------------------
byte RFID_Auth(personalData data, MFRC522* rfid)
{
      if (!compareArray(data.uid, rfid->uid.uidByte, 4))
      {
        return 1;
      }

      MFRC522::StatusCode status;
      status = rfid->PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, 1, &data.key, &(rfid->uid));
      if (status != MFRC522::STATUS_OK) 
      {
        return 2;
      }

      byte buff[18];
      byte len = 18;
      status = rfid->MIFARE_Read(1, buff, &len);
      if (status != MFRC522::STATUS_OK) 
      {
        return 3;
      }

      if (!compareArray(buff, data.passwd, 16))
      {
        return 4;
      }

      return 0;
}
// -----------------------------------------------------------------------------------------------------------
inline byte RFID_ChangePasswd(byte newPasswd[], MFRC522* rfid, MFRC522::MIFARE_Key key)
{
  return RFID_WriteBlock(newPasswd, rfid, key, 1);
}

bool isBlockPermitted(byte block)
{
#ifdef SECTORS_15
  if (block > 62) return false;
#endif

#ifdef SECTORS_14
  if (block > 58) return false;
#endif

  if (block < 8) return false;

  bool is = false;
  
  for (byte i = 0; i < 
#ifdef SECTORS_15
  42;
#endif
#ifdef SECTORS_14
  39;
#endif
  i++)
    if (block == permittedBlocks[i]) is = true;

  return is;
}
// -----------------------------------------------------------------------------------------------------------
byte RFID_WriteBlock(byte data[], MFRC522* rfid, MFRC522::MIFARE_Key key, byte block)
{
  MFRC522::StatusCode status;
  status = rfid->PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &key, &(rfid->uid));
  if (status != MFRC522::STATUS_OK) 
  {
    return 1;
  }

  byte data2[18];
  for (byte i = 0; i < 16; i++)
    data2[i] = data[i];
  
  status = rfid->MIFARE_Write(block, data2, 16);
  if (status != MFRC522::STATUS_OK) 
  {
    return 2;
  }

  return 0;
}
// -----------------------------------------------------------------------------------------------------------
byte RFID_ReadBlock(byte data[], MFRC522* rfid, MFRC522::MIFARE_Key key, byte block)
{
  MFRC522::StatusCode status;
  status = rfid->PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &key, &(rfid->uid));
  if (status != MFRC522::STATUS_OK) 
  {
    return 1;
  }

  byte buff[18];
  byte len = 18;
  
  status = rfid->MIFARE_Read(block, buff, &len);
  if (status != MFRC522::STATUS_OK) 
  {
    return 2;
  }

  copyArray(data, buff, 16);

  return 0;
}
// -----------------------------------------------------------------------------------------------------------
byte RFID_FormatCard(MFRC522* rfid, MFRC522::MIFARE_Key key)
{
  const byte data[18] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  
  for (byte i = 0; i < 
#ifdef SECTORS_15
  42;
#endif
#ifdef SECTORS_14
  39;
#endif
  i++)
  {
    byte block = permittedBlocks[i];

    MFRC522::StatusCode status;
    status = rfid->PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &key, &(rfid->uid));
    if (status != MFRC522::STATUS_OK) 
    {
      return 1;
    }

    status = rfid->MIFARE_Write(block, const_cast<byte*>(data), 16);
    if (status != MFRC522::STATUS_OK) 
    {
      return 2;
    }
  }

  return 0;
}
// -----------------------------------------------------------------------------------------------------------
inline personalData RFID_GetPersonalData()
{
  personalData data;
  
  Serial.println("KEY");
      
  data.key = RFID_GetKey();

  Serial.println("PASSWD");

  getArray(data.passwd, 16);

  Serial.println("UID");

  getArray(data.uid, 4);

  return data;
}

// -----------------------------------------------------------------------------------------------------------
inline bool RFID_WaitForCard(MFRC522* rfid, personalData personal)
{
  Serial.println("WAIT-CARD");
  
  while (!rfid->PICC_IsNewCardPresent()) { if (Serial.available()) {byte cmd = Serial.read(); if (cmd == 66) {Serial.println("CANCELED"); return true;}}}
  while (!rfid->PICC_ReadCardSerial());
  digitalWrite(13, LOW);
  Serial.println("CARD-PRESENT");

  byte ok = RFID_Auth(personal, rfid);
      
  if (ok == 1)      {Serial.println("ERR-UID");    return true;}
  else if (ok == 2) {Serial.println("ERR-KEY");    return true;}
  else if (ok == 3) {Serial.println("ERR-READ");   return true;}
  else if (ok == 4) {Serial.println("ERR-PASSWD"); return true;}

  return false;
}

最小可重现示例

Arduino：

void setup() 
{
  Serial.begin(9600);
}

void loop() 
{
  byte command;
  while (!Serial.available());
  command = Serial.read();
  // ...
  Serial.println("START");
  // Some operations
  byte someData;
  while (!Serial.available());
  someData = Serial.read();
  // Some operations
  Serial.println("OK");

  // Arduino receives, but not send
}

应用程序：

public static Status Authenticate(Key key, Passsword passwd, UID uid, string port)
        {
            SerialPort serial = new SerialPort(port, 9600, Parity.None, 8, StopBits.One);
            serial.Handshake = Handshake.None;

            serial.Open();

            byte[] cmd = { 1 };

            serial.Write(cmd, 0, 1); //Send command

            if (serial.ReadLine() != "START") //Device is ready. Here program is stuck, becuse it's waiting for START command that never comes
            { serial.Close(); return Status.Err; }

            serial.Write(cmd, 0, 1); //Send "someData"

            string stat = serial.ReadLine(); //Receive status

            serial.Close();

            switch (stat) //Check status
            {
                case "OK": return Status.OK;
                case "ERR-PASS": return Status.Inc_passwd;
                case "ERR-UID": return Status.Inc_uid;
                case "ERR-KEY": return Status.Inc_key;
                default: return Status.Err;
            }

arduino

serial-port

uart

回答 1

Stack Overflow用户

发布于 2021-01-06 04:31:40

好的，成功了。我添加了

serial.DtrEnable = true;
serial.RtsEnable = true;

在serial.Handshake = Handshake.None;之后

不管怎样，谢谢你的帮助。

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/65578309

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