private void Scan()
{
// get a list of all current devices attached to the computer
// Go through the list of existing Boards and remove any that no longer exist.
List<TreehopperBoard> BoardsToRemove = new List<TreehopperBoard>();
foreach(var board in Boards.ToList())
{
bool boardExistsInDeviceList = false;
foreach (UsbRegistry regDevice in UsbDevice.AllDevices)
{
if (regDevice.Vid == vid && regDevice.Pid == pid)
{
if(regDevice.Device != null)
{
TreehopperBoard newBoard = new TreehopperBoard(regDevice.Device);
if (newBoard.Equals(board))
{
boardExistsInDeviceList = true;
}
}
else
{ // If this property reads null, it's probably because the board is open.
boardExistsInDeviceList = true;
}
}
}
if (!boardExistsInDeviceList)
{
BoardsToRemove.Add(board);
}
}
foreach(var board in BoardsToRemove)
{
Boards.Remove(board);
Debug.WriteLine("New board list has " + Boards.Count + " Boards");
}
// Now add any new boards
foreach (UsbRegistry regDevice in UsbDevice.AllDevices)
{
if (regDevice.Vid == vid && regDevice.Pid == pid)
{
if(regDevice.Device != null)
{
TreehopperBoard newBoard = new TreehopperBoard(regDevice.Device);
if (PassesFilter(newBoard))
{
// add the board to the list if it doesn't already exist
bool alreadyInList = false;
foreach (var board in Boards)
{
if (board.Equals(newBoard))
{
alreadyInList = true;
}
}
if (!alreadyInList)
{
Boards.Add(newBoard);
Debug.WriteLine("Adding " + newBoard.ToString() + ". New board list has " + Boards.Count + " Boards");
}
}
}
}
}
}
