Tensorflow example not working on nRF Connect SDK

I have tried tensorflow example on nRF Connect SDK v1.6.1, v1.7.0 and v1.7.1 but all of them are not working.

To reproduce the behavior, build any example under zephyr\sample\modules\tensorflow

Here is the error from output console:

1> Compiling ‘model.cc’
2> Compiling ‘output_handler.cc’
4> [01m[K../src/main_functions.cc:19:10:[m[K [01;31m[Kfatal error: [m[Ktensorflow/lite/micro/all_ops_resolver.h: No such file or directory
4> compilation terminated.
2> In file included from [01m[K../src/output_handler.cc:17[m[K:
2> [01m[K../src/output_handler.h:20:10:[m[K [01;31m[Kfatal error: [m[Ktensorflow/lite/c/common.h: No such file or directory
2> compilation terminated.
Build failed

Top Replies

0 Simon over 4 years ago

I can see that CONFIG_TENSORFLOW_LITE_MICRO will get the value 'n', even if it's set to 'y'. I'm not sure why this is. Maybe that's what's leading to the issues you see.

However, since this is a Zephyr sample, I think you'll get better help if you create a Zephyr issue or ask in any of these resources: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/introduction/index.html#resources.

Check out this ticket as well: https://devzone.nordicsemi.com/f/nordic-q-a/79892/tensorflow-lite-micro-support-for-machine-learning/330840#330840

Best regards,

Simon
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0 kclauah over 4 years ago in reply to Simon
Thank you for the suggestions.

I have created an issue in zephyr github.

https://github.com/zephyrproject-rtos/zephyr/issues/40827

But the error

CONFIG_TENSORFLOW_LITE_MICRO was assigned the value y, but got the value n. Missing dependencies: 0

does it mean the tensorflow lite module is missing? I have tried searching all_ops_resolver.h but I got nothing. Maybe I can download the whole repo from https://github.com/tensorflow/tensorflow and put it in somewhere, is it correct?
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0 Simon over 4 years ago in reply to kclauah

Try installing Zephyr upstream instead of the nRF Connect SDK (NCS), which comes with different packages than NCS (Zephyr west.yml vs. NCS west yml).

Check out this for instructions how to install Zephyr upstream: https://docs.zephyrproject.org/2.7.0/getting_started/index.html

If the Tensorflow sample doesn't work with Zephyr upstream, then you should update https://github.com/zephyrproject-rtos/zephyr/issues/40827 and inform about that.
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0 kclauah over 4 years ago in reply to Simon

Thank you for the response.

I have followed the getting started guide instructions and install the Zephyr upstream using Ubuntu 20.0.4.

The tensorflow hello_world sample can be compiled correctly using nrf52dk_nrf52832 and nrf9160dk_nrf9160ns.

I have also tried downloading the module from https://github.com/zephyrproject-rtos/tensorflow and put it in <root>\modules\lib\tensorflow but still showing the same error.

Any suggestions is appreciated.
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0 kclauah over 4 years ago in reply to kclauah

The tensorflow example works after following the suggestions from @laurenmurphyx64. It is a bug from nrf-sdk and still exists in main stream.

See the GitHub issue for the solutions.

github.com/.../40827

@Simon How can I report a bug here?
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