VIM3 NPU demo on Android

Technical Support
1

Which Khadas SBC do you use?

VIM3 Pro

Which system do you use? Android, Ubuntu, OOWOW or others?

Android 9(P) 64bit, v230408

Which version of system do you use? Khadas official images, self built images, or others?

Khadas official / vim3-android-9-64bit-v230408.img

Please describe your issue below:

Hello, I want to use VIM3’s NPU on Android env.
I read the docs about running Android NPU demo app.
So I installed the demo app v1.1.

But, whatever I model clicked(yolov3, v2, …), it only shows the camera screen and nothing is recognized.
And the logcat via adb says,

linker : CANNOT LINK EXECUTABLE “/vendor/bin/hw/android.hardware.neuralnetworks@1.1-service-ovx-driver”: library “libstdc++.so” not found

  1. Why does the official image not included NPU driver’s dependencies?
  2. How should I solve it?

Thanks.

2

@numbqq @Frank @goenjoy

3

@xiong.zhang Please follow up on this issue.

4

@randomist

Hello, we have updated the official NPU demo based on v230408, you can download it and use it for testing and verification according to the description in the document
https://dl.khadas.com/development/khadas-npu-release-v6.4.6.2.apk