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listdevs.dart
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listdevs.dart
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import 'dart:ffi';
import 'dart:io';
import 'package:ffi/ffi.dart' as ffi;
import 'package:convert/convert.dart';
// git update-index --assume-unchanged example/listdevs.dart
// import 'package:libusb/libusb_windows.dart';
// import 'package:libusb/libusb_macos.dart';
// import 'package:libusb/libusb_linux.dart';
final DynamicLibrary Function() loadLibrary = () {
if (Platform.isWindows) {
return DynamicLibrary.open('${Directory.current.path}/libusb-1.0/libusb-1.0.dll');
} if (Platform.isMacOS) {
return DynamicLibrary.open('${Directory.current.path}/libusb-1.0/libusb-1.0.dylib');
} else if (Platform.isLinux) {
return DynamicLibrary.open('${Directory.current.path}/libusb-1.0/libusb-1.0.so');
}
return null;
};
final libusb = Libusb(loadLibrary());
void main(List<String> arguments) {
var initResult = libusb.libusb_init(nullptr);
if (initResult < 0) {
return;
}
var deviceListPtr = ffi.allocate<Pointer<Pointer<libusb_device>>>();
listdevs(deviceListPtr);
ffi.free(deviceListPtr);
libusb.libusb_exit(nullptr);
}
void listdevs(Pointer<Pointer<Pointer<libusb_device>>> deviceListPtr) {
var count = libusb.libusb_get_device_list(nullptr, deviceListPtr);
if (count < 0) {
return;
}
var deviceList = deviceListPtr.value;
printDevs(deviceList);
libusb.libusb_free_device_list(deviceList, 1);
}
void printDevs(Pointer<Pointer<libusb_device>> deviceList) {
var descPtr = ffi.allocate<libusb_device_descriptor>();
var path = ffi.allocate<Uint8>(count: 8);
for (var i = 0; deviceList[i] != nullptr; i++) {
var dev = deviceList[i];
var result = libusb.libusb_get_device_descriptor(dev, descPtr);
if (result < 0) continue;
var desc = descPtr.ref;
var idVendor = desc.idVendor.toRadixString(16).padLeft(4, '0');
var idProduct = desc.idProduct.toRadixString(16).padLeft(4, '0');
var bus = libusb.libusb_get_bus_number(dev).toRadixString(16);
var addr = libusb.libusb_get_device_address(dev).toRadixString(16);
print('$idVendor:$idProduct (bus $bus, device $addr)');
result = libusb.libusb_get_port_numbers(dev, path, 8);
if (result > 0) {
var hexList = path.asTypedList(8).map((e) => hex.encode([e]));
print(' path: ${hexList.join('.')}');
}
}
ffi.free(descPtr);
ffi.free(path);
}