transferIn method

@override Future<Uint8List?> transferIn(int packetSize, int timeout)

Implementation

@override
Future<Uint8List?> transferIn(int packetSize, int timeout) async {
  try {
    final activeDevice = _activeDevice;
    if (activeDevice == null) {
      throw Exception('No active device; use open() first');
    }
    final device = activeDevice.device;
    final endpointNumber = activeDevice.inEndpointNumber;

    if (!device.opened) {
      await device.open();
    }

    final result = await device.transferIn(endpointNumber, packetSize);
    return result.data;
  } catch (e) {
    debugPrint('Error in transferIn: $e');
    if (e.toString().contains('InvalidStateError')) {
      await _reopenDevice();
      return transferIn(packetSize, timeout);
    }
    return null;
  }
}