FT_CreateDeviceInfoList

This function builds a device information list and returns the number of D2XX devices connected to the system. The list contains information about both unopen and open devices.

FT_STATUS

FT_CreateDeviceInfoList

(LPDWORD lpdwNumDevs)

Parameters

lpdwNumDevs

Pointer to unsigned long to store the number of devices connected.

Return Value
FT_OK if successful, otherwise the return value is an FT error code.   



Remarks
An application can use this function to get the number of devices attached to the system. It can then allocate space for the device information list and retrieve the list using FT_GetDeviceInfoList.

If the devices connected to the system change, the device info list will not be updated until FT_CreateDeviceInfoList is called again.



Example

This example shows how to call FT_CreateDeviceInfoList.

FT_STATUS ftStatus;
DWORD numDevs;

//
// create the device information list
//
ftStatus = FT_CreateDeviceInfoList(&numDevs);
if (ftStatus == FT_OK) {
   printf("Number of devices is %d\n",numDevs);
}
else {
   // FT_CreateDeviceInfoList failed
}