write method
Implementation
Future<int> write(Uint8List data) async {
assert(data.length < 256);
int ret = 0;
using((Arena arena) {
var buffer = arena<Uint8>(data.length);
buffer.asTypedList(data.length).setAll(0, data);
ret = _writeDevice(this._device, buffer, data.length);
});
return ret;
}