I might be missing something here.. but running example/lib/main.dart and clicking on openDevices button always returns false for my connected android phone.

I am running the example on windows 10 development.

My phone is in developer mode and usb debugging is on.

Check permission comes out as true.

Is there any step to this because i cannot getConfiguration until openDevice returns true.

Sorry if the question comes out as mundane.

Thank you.

void main() async { await QuickUsb.init(); var deviceList = await QuickUsb.getDeviceList() .then((value) => print("debug device list $value"));

await GetStorage.init();

The print outputs an empty list [] but running flutter devices shows me the correct list of connected devices.

Hello, First of all thanks for the brilliant library. It works for me on MacOS. Now I am trying to use same device in windows 10 but it does not find the attached device. Any extra settings we need to do? I am getting null for all Manugacturer, product and serial number for windows.

Let me know.

Thanks

i'm using this plugin only on android when i'm building the web i'm getting below error.

b-0.3.23-nullsafety.0/lib/libusb64.dart:856:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_transfer> transfer, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:868:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_transfer> transfer, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:882:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_transfer> transfer, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:894:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_device_handle> dev_handle, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:899:21: Error: 'Uint8' isn't a type. ffi.Pointer<ffi.Uint8> data, ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:899:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Uint8> data, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:920:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_device_handle> dev_handle, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:922:21: Error: 'Uint8' isn't a type. ffi.Pointer<ffi.Uint8> data, ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:922:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Uint8> data, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:924:21: Error: 'Int32' isn't a type. ffi.Pointer<ffi.Int32> actual_length, ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:924:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Int32> actual_length, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:942:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_device_handle> dev_handle, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:944:21: Error: 'Uint8' isn't a type. ffi.Pointer<ffi.Uint8> data, ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:944:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Uint8> data, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:946:21: Error: 'Int32' isn't a type. ffi.Pointer<ffi.Int32> actual_length, ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:946:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Int32> actual_length, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:964:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_device_handle> dev_handle, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:966:21: Error: 'Uint8' isn't a type. ffi.Pointer<ffi.Uint8> data, ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:966:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Uint8> data, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:983:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:995:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1007:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1019:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1031:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1043:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1056:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1068:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1080:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1081:9: Error: 'Pointer' isn't a type. ffi.Pointer tv, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1094:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1095:9: Error: 'Pointer' isn't a type. ffi.Pointer tv, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1108:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1109:9: Error: 'Pointer' isn't a type. ffi.Pointer tv, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1110:21: Error: 'Int32' isn't a type. ffi.Pointer<ffi.Int32> completed, ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1110:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Int32> completed, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1126:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1138:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1139:21: Error: 'Int32' isn't a type. ffi.Pointer<ffi.Int32> completed, ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1139:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Int32> completed, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1153:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1154:9: Error: 'Pointer' isn't a type. ffi.Pointer tv, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1167:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1180:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1181:9: Error: 'Pointer' isn't a type. ffi.Pointer tv, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1194:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1206:21: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Pointer<libusb_pollfd>> pollfds, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1206:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Pointer<libusb_pollfd>> pollfds, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1218:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1219:21: Error: 'NativeFunction' isn't a type. ffi.Pointer<ffi.NativeFunction<libusb_pollfd_added_cb>> added_cb,
^^^^^^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1219:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.NativeFunction<libusb_pollfd_added_cb>> added_cb,
^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1220:21: Error: 'NativeFunction' isn't a type. ffi.Pointer<ffi.NativeFunction<libusb_pollfd_removed_cb>> removed_cb,
^^^^^^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1220:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.NativeFunction<libusb_pollfd_removed_cb>> removed_cb,
^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1221:21: Error: 'Void' isn't a type. ffi.Pointer<ffi.Void> user_data, ^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1221:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Void> user_data, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1269:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1275:21: Error: 'NativeFunction' isn't a type. ffi.Pointer<ffi.NativeFunction<libusb_hotplug_callback_fn>> cb_fn,
^^^^^^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1275:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.NativeFunction<libusb_hotplug_callback_fn>> cb_fn,
^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1276:21: Error: 'Void' isn't a type. ffi.Pointer<ffi.Void> user_data, ^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1276:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Void> user_data, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1277:21: Error: 'Int32' isn't a type. ffi.Pointer<ffi.Int32> callback_handle, ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1277:9: Error: 'Pointer' isn't a type. ffi.Pointer<ffi.Int32> callback_handle, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1308:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1323:9: Error: 'Pointer' isn't a type. ffi.Pointer<libusb_context> ctx, ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1701:28: Error: 'Uint8' isn't a type. external ffi.Pointer<ffi.Uint8> extra; ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1701:16: Error: 'Pointer' isn't a type. external ffi.Pointer<ffi.Uint8> extra; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1756:16: Error: 'Pointer' isn't a type. external ffi.Pointer<libusb_endpoint_descriptor> endpoint; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1760:28: Error: 'Uint8' isn't a type. external ffi.Pointer<ffi.Uint8> extra; ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1760:16: Error: 'Pointer' isn't a type. external ffi.Pointer<ffi.Uint8> extra; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1772:16: Error: 'Pointer' isn't a type. external ffi.Pointer<libusb_interface_descriptor> altsetting; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1824:16: Error: 'Pointer' isn't a type. external ffi.Pointer<libusb_interface> interface_1; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1828:28: Error: 'Uint8' isn't a type. external ffi.Pointer<ffi.Uint8> extra; ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1828:16: Error: 'Pointer' isn't a type. external ffi.Pointer<ffi.Uint8> extra; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2023:28: Error: 'Int8' isn't a type. external ffi.Pointer<ffi.Int8> rc; ^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2023:16: Error: 'Pointer' isn't a type. external ffi.Pointer<ffi.Int8> rc; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2026:28: Error: 'Int8' isn't a type. external ffi.Pointer<ffi.Int8> describe; ^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2026:16: Error: 'Pointer' isn't a type. external ffi.Pointer<ffi.Int8> describe; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/quick _usb-0.3.0/lib/src/utils.dart:8:29: Error: 'IntPtr' isn't a type. final int _maxSize = sizeOf() == 8 ? _kMaxSmi64 : _kMaxSmi32;
^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/quick _usb-0.3.0/lib/src/utils.dart:8:22: Error: Method not found: 'sizeOf'. final int _maxSize = sizeOf() == 8 ? _kMaxSmi64 : _kMaxSmi32;
^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:9:7: Error: 'DynamicLibrary' isn't a type. final DynamicLibrary stdlib = Platform.isWindows ^^^^^^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:10:7: Error: Undefined name 'DynamicLibrary'. ? DynamicLibrary.open('kernel32.dll') ^^^^^^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:11:7: Error: Undefined name 'DynamicLibrary'. : DynamicLibrary.process(); ^^^^^^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:31:7: Error: 'Pointer' isn't a type. final Pointer processHeap = winGetProcessHeap(); ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:67:5: Error: 'Pointer' isn't a type. Pointer result; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:91:13: Error: 'Pointer' isn't a type. void free(Pointer pointer) { ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:109:7: Error: 'Allocator' isn't a type. const Allocator malloc = _MallocAllocator(); ^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:132:5: Error: 'Pointer' isn't a type. Pointer result; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:157:13: Error: 'Pointer' isn't a type. void free(Pointer pointer) { ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/allocation.dart:176:7: Error: 'Allocator' isn't a type. const Allocator calloc = _CallocAllocator(); ^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/arena.dart:26:9: Error: 'Allocator' isn't a type. final Allocator _wrappedAllocator; ^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/arena.dart:29:22: Error: 'NativeType' isn't a type. final List<Pointer> _managedMemoryPointers = []; ^^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/arena.dart:29:14: Error: 'Pointer' isn't a type. final List<Pointer> _managedMemoryPointers = []; ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/arena.dart:40:10: Error: 'Allocator' isn't a type. Arena([Allocator allocator = calloc]) : _wrappedAllocator = allocator;
^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/arena.dart:101:21: Error: 'NativeType' isn't a type. void free(Pointer pointer) {} ^^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/arena.dart:101:13: Error: 'Pointer' isn't a type. void free(Pointer pointer) {} ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/arena.dart:120:6: Error: 'Allocator' isn't a type. [Allocator wrappedAllocator = calloc]) { ^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/arena.dart:144:6: Error: 'Allocator' isn't a type. [Allocator wrappedAllocator = calloc]) { ^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf8.dart:26:28: Error: 'Uint8' isn't a type. final codeUnits = cast(); ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf8.dart:43:28: Error: 'Uint8' isn't a type. final codeUnits = cast(); ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf8.dart:52:30: Error: 'Uint8' isn't a type. static int _length(Pointer codeUnits) { ^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf8.dart:52:22: Error: 'Pointer' isn't a type. static int _length(Pointer codeUnits) { ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf8.dart:81:31: Error: 'Allocator' isn't a type. Pointer toNativeUtf8({Allocator allocator = malloc}) { ^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf8.dart:83:19: Error: 'Uint8' isn't a type. final Pointer result = allocator(units.length + 1);
^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf8.dart:83:11: Error: 'Pointer' isn't a type. final Pointer result = allocator(units.length + 1);
^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf8.dart:83:45: Error: 'Uint8' isn't a type. final Pointer result = allocator(units.length + 1);
^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:26:28: Error: 'Uint16' isn't a type. final codeUnits = cast(); ^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:43:28: Error: 'Uint16' isn't a type. final codeUnits = cast(); ^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:52:46: Error: 'Uint16' isn't a type. static String _toKnownLengthString(Pointer codeUnits, int length)
=> ^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:52:38: Error: 'Pointer' isn't a type. static String _toKnownLengthString(Pointer codeUnits, int length)
=> ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:55:48: Error: 'Uint16' isn't a type. static String _toUnknownLengthString(Pointer codeUnits) { ^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:55:40: Error: 'Pointer' isn't a type. static String _toUnknownLengthString(Pointer codeUnits) { ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:68:30: Error: 'Uint16' isn't a type. static int _length(Pointer codeUnits) { ^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:68:22: Error: 'Pointer' isn't a type. static int _length(Pointer codeUnits) { ^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:93:33: Error: 'Allocator' isn't a type. Pointer toNativeUtf16({Allocator allocator = malloc}) { ^^^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:95:19: Error: 'Uint16' isn't a type. final Pointer result = allocator(units.length + 1);
^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:95:11: Error: 'Pointer' isn't a type. final Pointer result = allocator(units.length + 1);
^^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/ffi-1 .1.2/lib/src/utf16.dart:95:46: Error: 'Uint16' isn't a type. final Pointer result = allocator(units.length + 1);
^^^^^^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1592:16: Error: Only JS interop members may be 'external'. external int bLength; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1598:16: Error: Only JS interop members may be 'external'. external int bDescriptorType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1603:16: Error: Only JS interop members may be 'external'. external int bcdUSB; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1607:16: Error: Only JS interop members may be 'external'. external int bDeviceClass; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1612:16: Error: Only JS interop members may be 'external'. external int bDeviceSubClass; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1617:16: Error: Only JS interop members may be 'external'. external int bDeviceProtocol; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1621:16: Error: Only JS interop members may be 'external'. external int bMaxPacketSize0; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1625:16: Error: Only JS interop members may be 'external'. external int idVendor; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1629:16: Error: Only JS interop members may be 'external'. external int idProduct; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1633:16: Error: Only JS interop members may be 'external'. external int bcdDevice; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1637:16: Error: Only JS interop members may be 'external'. external int iManufacturer; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1641:16: Error: Only JS interop members may be 'external'. external int iProduct; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1645:16: Error: Only JS interop members may be 'external'. external int iSerialNumber; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1649:16: Error: Only JS interop members may be 'external'. external int bNumConfigurations; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1659:16: Error: Only JS interop members may be 'external'. external int bLength; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1665:16: Error: Only JS interop members may be 'external'. external int bDescriptorType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1671:16: Error: Only JS interop members may be 'external'. external int bEndpointAddress; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1680:16: Error: Only JS interop members may be 'external'. external int bmAttributes; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1684:16: Error: Only JS interop members may be 'external'. external int wMaxPacketSize; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1688:16: Error: Only JS interop members may be 'external'. external int bInterval; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1693:16: Error: Only JS interop members may be 'external'. external int bRefresh; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1697:16: Error: Only JS interop members may be 'external'. external int bSynchAddress; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1701:35: Error: Only JS interop members may be 'external'. external ffi.Pointer<ffi.Uint8> extra; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1705:16: Error: Only JS interop members may be 'external'. external int extra_length; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1715:16: Error: Only JS interop members may be 'external'. external int bLength; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1721:16: Error: Only JS interop members may be 'external'. external int bDescriptorType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1725:16: Error: Only JS interop members may be 'external'. external int bInterfaceNumber; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1729:16: Error: Only JS interop members may be 'external'. external int bAlternateSetting; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1734:16: Error: Only JS interop members may be 'external'. external int bNumEndpoints; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1738:16: Error: Only JS interop members may be 'external'. external int bInterfaceClass; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1743:16: Error: Only JS interop members may be 'external'. external int bInterfaceSubClass; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1748:16: Error: Only JS interop members may be 'external'. external int bInterfaceProtocol; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1752:16: Error: Only JS interop members may be 'external'. external int iInterface; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1756:52: Error: Only JS interop members may be 'external'. external ffi.Pointer<libusb_endpoint_descriptor> endpoint; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1760:35: Error: Only JS interop members may be 'external'. external ffi.Pointer<ffi.Uint8> extra; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1764:16: Error: Only JS interop members may be 'external'. external int extra_length; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1772:53: Error: Only JS interop members may be 'external'. external ffi.Pointer<libusb_interface_descriptor> altsetting; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1777:16: Error: Only JS interop members may be 'external'. external int num_altsetting; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1787:16: Error: Only JS interop members may be 'external'. external int bLength; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1793:16: Error: Only JS interop members may be 'external'. external int bDescriptorType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1797:16: Error: Only JS interop members may be 'external'. external int wTotalLength; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1801:16: Error: Only JS interop members may be 'external'. external int bNumInterfaces; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1805:16: Error: Only JS interop members may be 'external'. external int bConfigurationValue; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1809:16: Error: Only JS interop members may be 'external'. external int iConfiguration; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1813:16: Error: Only JS interop members may be 'external'. external int bmAttributes; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1820:16: Error: Only JS interop members may be 'external'. external int MaxPower; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1824:42: Error: Only JS interop members may be 'external'. external ffi.Pointer<libusb_interface> interface_1; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1828:35: Error: Only JS interop members may be 'external'. external ffi.Pointer<ffi.Uint8> extra; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1832:16: Error: Only JS interop members may be 'external'. external int extra_length; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1843:16: Error: Only JS interop members may be 'external'. external int bLength; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1849:16: Error: Only JS interop members may be 'external'. external int bDescriptorType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1854:16: Error: Only JS interop members may be 'external'. external int bMaxBurst; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1861:16: Error: Only JS interop members may be 'external'. external int bmAttributes; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1866:16: Error: Only JS interop members may be 'external'. external int wBytesPerInterval; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1888:16: Error: Only JS interop members may be 'external'. external int bLength; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1894:16: Error: Only JS interop members may be 'external'. external int bDescriptorType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1900:16: Error: Only JS interop members may be 'external'. external int bDevCapabilityType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1907:16: Error: Only JS interop members may be 'external'. external int bmAttributes; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1917:16: Error: Only JS interop members may be 'external'. external int bLength; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1923:16: Error: Only JS interop members may be 'external'. external int bDescriptorType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1929:16: Error: Only JS interop members may be 'external'. external int bDevCapabilityType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1936:16: Error: Only JS interop members may be 'external'. external int bmAttributes; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1941:16: Error: Only JS interop members may be 'external'. external int wSpeedSupported; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1948:16: Error: Only JS interop members may be 'external'. external int bFunctionalitySupport; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1952:16: Error: Only JS interop members may be 'external'. external int bU1DevExitLat; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1956:16: Error: Only JS interop members may be 'external'. external int bU2DevExitLat; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1973:16: Error: Only JS interop members may be 'external'. external int bmRequestType; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1981:16: Error: Only JS interop members may be 'external'. external int bRequest; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1985:16: Error: Only JS interop members may be 'external'. external int wValue; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1990:16: Error: Only JS interop members may be 'external'. external int wIndex; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:1994:16: Error: Only JS interop members may be 'external'. external int wLength; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2008:16: Error: Only JS interop members may be 'external'. external int major; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2012:16: Error: Only JS interop members may be 'external'. external int minor; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2016:16: Error: Only JS interop members may be 'external'. external int micro; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2020:16: Error: Only JS interop members may be 'external'. external int nano; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2023:34: Error: Only JS interop members may be 'external'. external ffi.Pointer<ffi.Int8> rc; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2026:34: Error: Only JS interop members may be 'external'. external ffi.Pointer<ffi.Int8> describe; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2227:16: Error: Only JS interop members may be 'external'. external int length; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2231:16: Error: Only JS interop members may be 'external'. external int actual_length; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2235:16: Error: Only JS interop members may be 'external'. external int status; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2295:16: Error: Only JS interop members may be 'external'. external int tv_sec; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2298:16: Error: Only JS interop members may be 'external'. external int tv_usec; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2306:16: Error: Only JS interop members may be 'external'. external int fd; ^ /C:/Users/Jack%20Selvam/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/libus b-0.3.23-nullsafety.0/lib/libusb64.dart:2313:16: Error: Only JS interop members may be 'external'. external int events; ^ Error: Compilation failed.

Using "develop" branch (which includes updated FFI 1.0.0) within Flutter Desktop Linux, the following error occurs:

Launching lib/main.dart on Linux in debug mode... ERROR: ../../../../.pub-cache/git/quick_usb-9db68d8c68560526baacc373f9db87f37dd7efcf/lib/src/quick_usb_platform_interface.dart:11:27: Error: Field '_instance' should be initialized because its type 'QuickUsbPlatform' doesn't allow null. ERROR: - 'QuickUsbPlatform' is from 'package:quick_usb/src/quick_usb_platform_interface.dart' ('../../../../.pub-cache/git/quick_usb-9db68d8c68560526baacc373f9db87f37dd7efcf/lib/src/quick_usb_platform_interface.dart'). ERROR: static QuickUsbPlatform _instance; ERROR: ^^^^^^^^^ ERROR: ../../../../.pub-cache/git/quick_usb-9db68d8c68560526baacc373f9db87f37dd7efcf/lib/src/quick_usb_android.dart:24:9: Error: A value of type 'List<Map<dynamic, dynamic>>?' can't be assigned to a variable of type 'List<Map<dynamic, dynamic>>' because 'List<Map<dynamic, dynamic>>?' is nullable and 'List<Map<dynamic, dynamic>>' isn't. ERROR: - 'List' is from 'dart:core'. ERROR: - 'Map' is from 'dart:core'. ERROR: await _channel.invokeListMethod('getDeviceList'); ERROR: ^ ERROR: ../../../../.pub-cache/git/quick_usb-9db68d8c68560526baacc373f9db87f37dd7efcf/lib/src/quick_usb_android.dart:30:21: Error: A value of type 'Future' can't be returned from a function with return type 'Future'. ERROR: - 'Future' is from 'dart:async'. ERROR: return _channel.invokeMethod('hasPermission', usbDevice.toMap()); ERROR: ^ ERROR: ../../../../.pub-cache/git/quick_usb-9db68d8c68560526baacc373f9db87f37dd7efcf/lib/src/quick_usb_android.dart:40:21: Error: A value of type 'Future' can't be returned from a function with return type 'Future'. ERROR: - 'Future' is from 'dart:async'. ERROR: return _channel.invokeMethod('openDevice', usbDevice.toMap());

ERROR: ^ ERROR: ../../../../.pub-cache/git/quick_usb-9db68d8c68560526baacc373f9db87f37dd7efcf/lib/src/quick_usb_android.dart:58:21: Error: A value of type 'Future' can't be returned from a function with return type 'Future'. ERROR: - 'Future' is from 'dart:async'. ERROR: return _channel.invokeMethod('setConfiguration', config.toMap()); ERROR: ^ ERROR: ../../../../.pub-cache/git/quick_usb-9db68d8c68560526baacc373f9db87f37dd7efcf/lib/src/quick_usb_android.dart:63:21: Error: A value of type 'Future' can't be returned from a function with return type 'Future'. ERROR: - 'Future' is from 'dart:async'. ERROR: return _channel.invokeMethod('claimInterface', intf.toMap()); ERROR: ^ ERROR: ../../../../.pub-cache/git/quick_usb-9db68d8c68560526baacc373f9db87f37dd7efcf/lib/src/quick_usb_android.dart:68:21: Error: A value of type 'Future' can't be returned from a function with return type 'Future'. ERROR: - 'Future' is from 'dart:async'. ERROR: return _channel.invokeMethod('releaseInterface', intf.toMap()); ERROR: ^ ERROR: ../../../../.pub-cache/git/quick_usb-9db68d8c68560526baacc373f9db87f37dd7efcf/lib/src/quick_usb_android.dart:88:21: Error: A value of type 'Future' can't be returned from a function with return type 'Future'. ERROR: - 'Future' is from 'dart:async'. ERROR: return _channel.invokeMethod('bulkTransferOut', { ERROR: ^

Exception: Build process failed Exited (sigterm)

Hello, I need to send and receive data via USB. I'm trying to use the bulkTransferIn part, but how do I send the data? Where should I write the data I will send?

Hi, I'm running MacOS 10.15, stable channel of latest flutter & dart.

No errors on my flutter doctor.

I get the following when I try to run the example.

I tried to look for my libusb location, and it's different from what the warning says.

How can I change the path where it looks for the library? Or what should I do in order to fix this?

[ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: PlatformException(error, com.example.flutter_usb_check: Targeting S+ (version 31 and above) requires that 
one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
E/flutter (11462): Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles., null, java.lang.IllegalArgumentException: com.example.flutter_usb_check: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified 
when creating a PendingIntent.
E/flutter (11462): Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
E/flutter (11462):      at android.app.PendingIntent.checkFlags(PendingIntent.java:375)
E/flutter (11462):      at android.app.PendingIntent.getBroadcastAsUser(PendingIntent.java:645)
E/flutter (11462):      at android.app.PendingIntent.getBroadcast(PendingIntent.java:632)
E/flutter (11462):      at com.example.quick_usb.QuickUsbPluginKt.pendingPermissionIntent(QuickUsbPlugin.kt:18)
E/flutter (11462):      at com.example.quick_usb.QuickUsbPluginKt.access$pendingPermissionIntent(QuickUsbPlugin.kt:1)
E/flutter (11462):      at com.example.quick_usb.QuickUsbPlugin.onMethodCall(QuickUsbPlugin.kt:85)
E/flutter (11462):      at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:262)
E/flutter (11462):      at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:296)
E/flutter (11462):      at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$DartMessenger(DartMessenger.java:320)
E/flutter (11462):      at io.flutter.embedding.engine.dart.-$$Lambda$DartMessenger$TsixYUB5E6FpKhMtCSQVHKE89gQ.run(Unknown Source:12)
E/flutter (11462):      at android.os.Handler.handleCallback(Handler.java:938)
E/flutter (11462):      at android.os.Handler.dispatchMessage(Handler.java:99)
E/flutter (11462):      at android.os.Looper.loopOnce(Looper.java:233)
E/flutter (11462):      at android.os.Looper.loop(Looper.java:334)
E/flutter (11462):      at android.app.ActivityThread.main(ActivityThread.java:8396)
E/flutter (11462):      at java.lang.reflect.Method.invoke(Native Method)
E/flutter (11462):      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:582)
E/flutter (11462):      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1068)
E/flutter (11462): )
E/flutter (11462): #0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:607:7)
E/flutter (11462): #1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:177:18)
E/flutter (11462): <asynchronous suspension>
E/flutter (11462): #2      _MyAppState._has_request.<anonymous closure> (package:flutter_usb_check/main.dart:109:13)
E/flutter (11462): <asynchronous suspension>
E/flutter (11462):

@Sunbreak hi there, since you have worked on the desktop release as well as MacOS I wanted to know whether you will continue your work on completing the package to support both null safety and add support for iOS?

Im going to use this package in an app that is running both on Android and Linux. I modified the example app little bit and used it for Android but I have faced with an error that I haven't been able to find any solution.

modified example app

From the example app, I go over as

1. init
2. getDeviceList
3. hasPermission
4. requestPermission
5. openDevice
6. getConfiguration
7. claimInterface
8. bulkTransferIn

Everything seems alright until I start reading data at step 8.

The error:

E/MethodChannel#quick_usb(26400): Failed to handle method call
E/MethodChannel#quick_usb(26400): java.lang.IllegalArgumentException: Requested element count -1 is less than zero.
E/MethodChannel#quick_usb(26400): 	at kotlin.collections.ArraysKt___ArraysKt.take(_Arrays.kt:4783)
E/MethodChannel#quick_usb(26400): 	at com.example.quick_usb.QuickUsbPlugin.onMethodCall(QuickUsbPlugin.kt:141)
E/MethodChannel#quick_usb(26400): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:262)
E/MethodChannel#quick_usb(26400): 	at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:296)
E/MethodChannel#quick_usb(26400): 	at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$DartMessenger(DartMessenger.java:320)
E/MethodChannel#quick_usb(26400): 	at io.flutter.embedding.engine.dart.-$$Lambda$DartMessenger$TsixYUB5E6FpKhMtCSQVHKE89gQ.run(Unknown Source:12)
E/MethodChannel#quick_usb(26400): 	at android.os.Handler.handleCallback(Handler.java:938)
E/MethodChannel#quick_usb(26400): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/MethodChannel#quick_usb(26400): 	at android.os.Looper.loop(Looper.java:247)
E/MethodChannel#quick_usb(26400): 	at android.app.ActivityThread.main(ActivityThread.java:8676)
E/MethodChannel#quick_usb(26400): 	at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#quick_usb(26400): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
E/MethodChannel#quick_usb(26400): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
E/flutter (26400): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: PlatformException(error, Requested element count -1 is less than zero., null, java.lang.IllegalArgumentException: Requested element count -1 is less than zero.
E/flutter (26400): 	at kotlin.collections.ArraysKt___ArraysKt.take(_Arrays.kt:4783)
E/flutter (26400): 	at com.example.quick_usb.QuickUsbPlugin.onMethodCall(QuickUsbPlugin.kt:141)
E/flutter (26400): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:262)
E/flutter (26400): 	at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:296)
E/flutter (26400): 	at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$DartMessenger(DartMessenger.java:320)
E/flutter (26400): 	at io.flutter.embedding.engine.dart.-$$Lambda$DartMessenger$TsixYUB5E6FpKhMtCSQVHKE89gQ.run(Unknown Source:12)
E/flutter (26400): 	at android.os.Handler.handleCallback(Handler.java:938)
E/flutter (26400): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/flutter (26400): 	at android.os.Looper.loop(Looper.java:247)
E/flutter (26400): 	at android.app.ActivityThread.main(ActivityThread.java:8676)
E/flutter (26400): 	at java.lang.reflect.Method.invoke(Native Method)
E/flutter (26400): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
E/flutter (26400): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
E/flutter (26400): )
E/flutter (26400): #0      StandardMethodCodec.decodeEnvelope
E/flutter (26400): #1      MethodChannel._invokeMethod
E/flutter (26400): <asynchronous suspension>
E/flutter (26400): #2      QuickUsbAndroid.bulkTransferIn
E/flutter (26400): <asynchronous suspension>
E/flutter (26400): #3      _MyAppState._bulkTransfer.<anonymous closure>
E/flutter (26400): <asynchronous suspension>
E/flutter (26400):

Interestingly, when I use bulkTransferOut, I get the correct output: I/flutter (26400): bulkTransferOut 2

Currently there is no way to present human friendly list of devices for user to select (IE. select pos printer). I added 2 new functions to get human friendly info about UsbDevice.

getDeviceDescription returns new object of UsbDeviceDescription type with manufacturer, product & serial number info. getDevicesWithDescription returns list of UsbDeviceDescription type with manufacturer, product & serial number info.

All devices/handles are opened/closed automatically. Default device handle is neither populated or used since this opens and closes multiple devices. Existing object model and api is left as is.

See https://github.com/woodemi/quick_usb/issues/21

In my case, data is inputted erratically through the serial port to my android device, thus the bulkTransferIn function doesn't really suite my purpose. Plugins like usb_serial let you specify a function to be run whenever the android device receives any data through the serial device. Should I run the bulkTransferIn function on a loop or is there a better way to achieve my purpose using this plugin?

Quick_Usb is now a singleton which means can only open one device for the same time. While there exists scenarios that need to concurrently communicate with multiple usb devices.

Is it possible? Is there any plan to support this feature?

It's really a great library, let me make a small suggestion.

Some operations should be based on a customizable device that is already open

Of course it doesn't affect the use, but it would be better to optimize it.