AN3224 datasheet(23/49 Pages) STMICROELECTRONICS

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AN3224

PR101-USB and MR101-USB reader detection

Doc ID 17559 Rev 2

23/49

'- txtDeviceID.Text = "Device-ID : " & lngDeviceId(i)

Next i

End If

'--- analysis if FEIG USB readers are connected and how much

If (lngReaderNumber = 0) Then

'--- NO FEIG USB device detected

‘txtDetectResult.Text = "No FEIG USB Reader detected"

detect_USB_FEIG_reader = False

ElseIf (lngReaderNumber > 1) Then

'--- TOO MUCH DETECTED FEIG USB READERs

‘txtDetectResult.Text = "Too much FEIG USB Reader detected"

detect_USB_FEIG_reader = False

ElseIf (lngReaderNumber = 1) Then

'--- only One FEIG USB device detected OK

glngFEUSBhandle = FEUSB_OpenDevice(lngDeviceId(1))

If (glngFEUSBhandle < 0) Then

error = FEUSB_CloseDevice(glngFEUSBhandle)

detect_USB_FEIG_reader = False

Else

lngAttachedDeviceHandle(0) = FEISC_NewReader(glngFEUSBhandle)

detect_USB_FEIG_reader = True

End If

End Function

4.4

C/C++ source code example

/* global variables */

int iDeviceHandle;

int iFeiscHandle;

int main ()

{

char

sDeviceHandle[32];

char

sDeviceName[32];

char

sDeviceSerialNumber[32];

char

sDeviceFamilyName[32];

char

sDevicePresence[2];

DWORD dwDeviceSerialNumber = 0;

FEUSB_ClearScanList();/* check USB device connected */

while (FEUSB_Scan(FEUSB_SCAN_FIRST,NULL) < 0)

{

/* time out to be added toexit while loop If no reader connected

/*return 0;

}

/* GetScanListPara : Get Detected FEIG USB device parameters */

FEUSB_GetScanListPara( 0, "DeviceName", sDeviceName ) ;

FEUSB_GetScanListPara( 0, "Device-ID", sDeviceSerialNumber ) ;

FEUSB_GetScanListPara( 0, "DeviceHnd", sDeviceHandle ) ;

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