我們如何關閉智能卡讀卡器蜂鳴器？

我是一個智能卡讀卡器的新手。我買了一臺ACR1252u，並且停止了蜂鳴器的工作。我曾嘗試這樣的代碼： https://the--semicolon.blogspot.it/p/this-is-simple-way-to-restart-your.html?showComment=1468833507200 我們如何關閉智能卡讀卡器蜂鳴器？

public void turnOffBuzzer() 
     { 
       retCode = Card.SCardConnect(hContext, readername, Card.SCARD_SHARE_SHARED, Card.SCARD_PROTOCOL_T0 | Card.SCARD_PROTOCOL_T1, ref hCard, ref Protocol); 
       byte data= 0x00 ; 
       byte[] control = new byte[] { 0xE0, 0x00, 0x00, 0x28, 0x01 }; 
       uint value = BitConverter.ToUInt32(control, 0); 
       byte receivedBytes = new byte(); 
       int pcbBytesReturned = 0; 
       long status = Card.SCardControl(hCard, value, ref data, 1,ref receivedBytes , 1, ref pcbBytesReturned); 
       MessageBox.Show(status.ToString()); 
     }

但狀態給了我1不是0

來源

2016-07-18 Farzad Moghaddampoor

嗯我已經找到了如何它的工作！

用於關閉蜂鳴器：

retCode = Card.SCardConnect(hContext, readername, Card.SCARD_SHARE_SHARED, 
        Card.SCARD_PROTOCOL_T0 | Card.SCARD_PROTOCOL_T1, ref hCard, ref Protocol); 

      Byte[] setBuzzerLoud = new Byte[6]; 
      setBuzzerLoud[0] = 0xE0; 
      setBuzzerLoud[1] = 0x00; 
      setBuzzerLoud[2] = 0x00; 
      setBuzzerLoud[3] = 0x21; 
      setBuzzerLoud[4] = 0x01; 
      setBuzzerLoud[5] = 0x77; 
      uint pcBytesReturned = 0; 
      Byte[] RecieveBuff = new Byte[64]; 
      uint controlcode = 3225264; 
      int status = Card.SCardControl(hCard, controlcode, ref setBuzzerLoud[0], 6, ref RecieveBuff[0], RecieveBuff.Length, ref pcBytesReturned); 

      MessageBox.Show(status.ToString());

用於關閉LED：

retCode = Card.SCardConnect(hContext, readername, Card.SCARD_SHARE_SHARED, 
       Card.SCARD_PROTOCOL_T0 | Card.SCARD_PROTOCOL_T1, ref hCard, ref Protocol); 

      Byte[] setLEDOFF = new Byte[6]; 
      setLEDOFF[0] = 0xE0; 
      setLEDOFF[1] = 0x00; 
      setLEDOFF[2] = 0x00; 
      setLEDOFF[3] = 0x21; 
      setLEDOFF[4] = 0x01; 
      setLEDOFF[5] = 0x79; 
      uint pcBytesReturned = 0; 
      Byte[] RecieveBuff = new Byte[64]; 
      uint controlcode = 3225264; 
      int status = Card.SCardControl(hCard, controlcode, ref setLEDOFF[0], 6, ref RecieveBuff[0], RecieveBuff.Length, ref pcBytesReturned); 

      MessageBox.Show(status.ToString());

對於關閉RF：

retCode = Card.SCardConnect(hContext, readername, Card.SCARD_SHARE_SHARED, 
      Card.SCARD_PROTOCOL_T0 | Card.SCARD_PROTOCOL_T1, ref hCard, ref Protocol); 

      Byte[] setRFOff = new Byte[6]; 
      setRFOff[0] = 0xE0; 
      setRFOff[1] = 0x00; 
      setRFOff[2] = 0x00; 
      setRFOff[3] = 0x23; 
      setRFOff[4] = 0x01; 
      setRFOff[5] = 0x80; 
      uint pcBytesReturned = 0; 
      Byte[] RecieveBuff = new Byte[64]; 
      uint controlcode = 3225264; 
      int status = Card.SCardControl(hCard, controlcode, ref setRFOff[0], 6, ref RecieveBuff[0], RecieveBuff.Length, ref pcBytesReturned); 

      MessageBox.Show(status.ToString());

有趣的是控制代碼在那裏我調試了鏈接中提到的C++代碼，以便爲這款智能卡讀卡器找到它：

DWORD controlcode = SCARD_CTL_CODE(3500);

轉義碼寫在41/77頁。

SCARD_CTL_CODE（3500）

唯一的問題是如何關閉的設置不會對讀卡器的RFID。我也找到了一篇文章，談論改變一些註冊表項的USB參數，我也會嘗試它。任何能夠幫助我的人都會很高興。

完成！享受

來源

2016-07-19 09:31:23

我們如何關閉智能卡讀卡器蜂鳴器？

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