我是智能卡读卡器的新手。我买了一台ACR1252u,卡在禁用蜂鸣器和导致。我试过这段代码: https://the--semicolon.blogspot.it/p/this-is-simple-way-to-restart-your.html?showComment=1468833507200
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());
}
但状态给我1而不是0
答案 0 :(得分:0)
嗯,我发现它是如何工作的!
关闭蜂鸣器:
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());
关闭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());
关闭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());
有趣的是控制代码,我调试了链接中提到的c ++代码,为这个智能卡读卡器找到它:
DWORD controlcode = SCARD_CTL_CODE(3500);
转义码写于第41/77页。
SCARD_CTL_CODE(3500)
唯一的问题是如何在没有读卡器上的rfid的情况下关闭设置。我还发现了一篇文章,讨论如何更改usb参数中的一些注册表项,我也会尝试它。任何能帮助我的人我都会很高兴。
完成! 享受
答案 1 :(得分:0)
如果要在阅读器附近没有任何rfid标签的情况下发送一些ScardControl命令,则可以尝试在Card.SCardConnect函数中使用“ Card.SCARD_SHARE_DIRECT”。