Compile error for ESP32S3

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#1

Hello

I’m trying to build the reference project firmware-espressif-esp32 for ESP32S3 chip using esp-idf v4.4 but getting this error:

CMake Error at /home/builder/esp/esp-idf/tools/cmake/component.cmake:471 (add_library):
Cannot find source file:

/home/builder/workspace/firmware-espressif-esp32/components/esp-nn/src/common/esp_nn_common_functions_esp32s3.S

Tried extensions .c .C .c++ .cc .cpp .cxx .cu .mpp .m .M .mm .ixx .cppm .h
.hh .h++ .hm .hpp .hxx .in .txx .f .F .for .f77 .f90 .f95 .f03 .hip .ispc
Call Stack (most recent call first):
components/esp-nn/CMakeLists.txt:40 (idf_component_register)

CMake Error at /home/builder/esp/esp-idf/tools/cmake/component.cmake:471 (add_library):
No SOURCES given to target: __idf_esp-nn
Call Stack (most recent call first):
components/esp-nn/CMakeLists.txt:40 (idf_component_register)

I understand ESP32S3 is not a supposted chip by EI but I was wondering if there is a work around to be able to run the code on this chip?

Regards,
Sina

#2

Hi.
Not sure if it will help you…
In the following tutorial for EI and Arduino IDE, Marcelo Rovai show how to DISABLE NN functions for the ESP32-S3 CHIP, which is not supported yet in EI Studio…

https://www.hackster.io/mjrobot/tinyml-made-easy-image-classification-cb42ae

Just change:
#define EI_CLASSIFIER_TFLITE_ENABLE_ESP_NN 1
to
#define EI_CLASSIFIER_TFLITE_ENABLE_ESP_NN 0
to disable NN functions…

The error you are getting may be related with it…
Have a look there, it may give you some hints about what to do…

Regards,
Valter

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#3

Thanks Valter. I actually have had disabled the NN component but the compilation error is still there. I’m thinking it might be related to the esp-idf version. I’m using v4.4 but going to upgrade do v5.1 to see if it makes a difference.

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#4

Hi!
So, there is a way you can run impulse with ESP NN acceleration on ESP32-S3:

You definitely want to be using esp-idf 4.4 and do not upgrade to 5.1.
Basically you have two routes:

  1. Disable ESP NN acceleration - if you are doing it when building standalone example, you’ll need to change the define in main/CMakeLists.txt
    -DEI_CLASSIFIER_TFLITE_ENABLE_ESP_NN=1) # enables ESP-NN optimizations by Espressif
  2. Follow the guide above and use modified ESP NN version - in this case you can leave the acceleration on. Note that it will only work with non-EON compiled models.
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