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Error when trying to conver tflite to C-code with stedgeai generate parameter --st-neural-art

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lyannen
Associate II

‎2025-08-01 3:39 AM

Hello, 

im trying to convert a .tflite model (encoder-decoder model, with only supported layers by stedgeai) to C-code to use it in my STM32CubeIde project.

When using the command:
/opt/ST/STEdgeAI/2.1/Utilities/linux/stedgeai generate --model model.tflite --target stm32n6 --st-neural-art 

I'm getting the following error output, im not really getting my head around:

ST Edge AI Core v2.1.0-20194 329b0e98d
WARNING: gemm_0 is not quantized                                                                                                                                    
WARNING: nl_0_nl is not quantized                                                                                                                                   
WARNING: gemm_1 is not quantized                                                                                                                                    
WARNING: nl_1_nl is not quantized                                                                                                                                   
WARNING: gemm_2 is not quantized                                                                                                                                    
WARNING: nl_2_nl is not quantized                                                                                                                                   
WARNING: reshape_3 is not quantized                                                                                                                                 
WARNING: gemm_4 is not quantized                                                                                                                                    
WARNING: nl_5 is not quantized                                                                                                                                      
WARNING: reshape_6 is not quantized                                                                                                                                 
 >>>> EXECUTING NEURAL ART COMPILER                                                                                                                                 
   /opt/ST/STEdgeAI/2.1/Utilities/linux/atonn -i "/local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_output/gcode_model_OE_3_2_0.onnx" --json-quant-file "/local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_output/gcode_model_OE_3_2_0_Q.json" -g "network.c" --load-mdesc "/opt/ST/STEdgeAI/2.1/Utilities/configs/stm32n6.mdesc" --load-mpool "/local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/my_mpools/stm32n6-app2_STM32N6570-DK.mpool" --save-mpool-file "/local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_ws/neural_art__network/stm32n6-app2_STM32N6570-DK.mpool" --out-dir-prefix "/local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_ws/neural_art__network/" -O3 --all-buffers-info --mvei --cache-maintenance --Oalt-sched --native-float --enable-virtual-mem-pools --Omax-ca-pipe 4 --Ocache-opt --Os --enable-epoch-controller --output-info-file "c_info.json"
                                                                                                                                                                    
      >>> Shell execution has FAILED (returned code = 1)
      $ /opt/ST/STEdgeAI/2.1/Utilities/linux/atonn -i /local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_output/gcode_model_OE_3_2_0.onnx --json-quant-file /local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_output/gcode_model_OE_3_2_0_Q.json -g network.c --load-mdesc /opt/ST/STEdgeAI/2.1/Utilities/configs/stm32n6.mdesc --load-mpool /local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/my_mpools/stm32n6-app2_STM32N6570-DK.mpool --save-mpool-file /local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_ws/neural_art__network/stm32n6-app2_STM32N6570-DK.mpool --out-dir-prefix /local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_ws/neural_art__network/ -O3 --all-buffers-info --mvei --cache-maintenance --Oalt-sched --native-float --enable-virtual-mem-pools --Omax-ca-pipe 4 --Ocache-opt --Os --enable-epoch-controller --output-info-file c_info.json
                                                                                                                                                                    
      saving memory pool description "/local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_ws/neural_art__network/stm32n6-app2_STM32N6570-DK.mpool"
      Error: optimize round /home/atonci/ci/atonci/workspace/release_STAI_21/onnx_backend/onnx_passes/transform_gemm_fc_into_conv.cc:201: runTransform: Assertion `(b_shape.size() == 1) || ((b_shape[0].dim == M) || b_shape[0].dim == N)` failed.
      Warning: Missing Quantization info for Gemm_1_weights; will consider Gemm_1_weights as a native Float                                                         
      Warning: Missing Quantization info for Gemm_1_weights; will consider Gemm_1_weights as a native Float                                                         
      Warning: Missing Quantization info for Gemm_3_weights; will consider Gemm_3_weights as a native Float                                                         
      Warning: Missing Quantization info for Gemm_3_weights; will consider Gemm_3_weights as a native Float                                                         
      Warning: Missing Quantization info for Gemm_5_weights; will consider Gemm_5_weights as a native Float                                                         
      Warning: Missing Quantization info for Gemm_5_weights; will consider Gemm_5_weights as a native Float                                                         
      NOT all epochs mapped on epoch controller: num_epochs=11 num_mapped_epochs=2 num_blobs=2                                                                      
      <<<                                                                                                                                                           
                                                                                                                                                                    
   E103(CliRuntimeError): Error calling the Neural Art compiler - ['', 'saving memory pool description "/local/projekte/Uni/Masterarbeit/EmbeddedModelsSt/gcode_prediction_dataset/gcode_prediction_model/STM_friendly_LSTM_model/st_ai_ws/neural_art__network/stm32n6-app2_STM32N6570-DK.mpool"', '', 'Error: optimize round /home/atonci/ci/atonci/workspace/release_STAI_21/onnx_backend/onnx_passes/transform_gemm_fc_into_conv.cc:201: runTransform: Assertion `(b_shape.size() == 1) || ((b_shape[0].dim == M) || b_shape[0].dim == N)` failed.', '', 'Warning: Missing Quantization info for Gemm_1_weights; will consider Gemm_1_weights as a native Float', 'Warning: Missing Quantization info for Gemm_1_weights; will consider Gemm_1_weights as a native Float', 'Warning: Missing Quantization info for Gemm_3_weights; will consider Gemm_3_weights as a native Float', 'Warning: Missing Quantization info for Gemm_3_weights; will consider Gemm_3_weights as a native Float', 'Warning: Missing Quantization info for Gemm_5_weights; will consider Gemm_5_weights as a native Float', 'Warning: Missing Quantization info for Gemm_5_weights; will consider Gemm_5_weights as a native Float', 'NOT all epochs mapped on epoch controller: num_epochs=11 num_mapped_epochs=2 num_blobs=2']

But when im using the stedgeai generate command without the --st-neural-art parameter the conversion works and i get the network.c/h files, but im missing the "network_atonbuf.xSPI2.raw" file, which i think is needed for using the model within the application (correct me if im wrong and the network.c/h files are enough)?

So my question is: Can i use the converted C-code of my tflite model, that i generated using stedgeai generate without the --st-neural-art paramter and without the "network_atonbuf.xSPI2.raw" file?

 

If any further information is needed, feel free to let me know!

Kind regards

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Julian E.
ST Employee

‎2025-08-01 5:23 AM - edited ‎2025-08-01 5:23 AM

Hello @lyannen,

 

The --st-neural-art is to use the NPU.

Without it is a running the model only on the MCU, or said differently only with SW epoch.

But yes it works.

 

I am not sure what the meaning of your error is exactly.

All I can say is that in any case, for the NPU to be used to do the calculation, layers in your model must be in int8.

 

In short:

no --st-neural-art -> MCU

not quantized int8 -> MCU

else NPU if the layer is supported or potential SW fallback (MCU)

 

You can find all the documentation here:

https://stedgeai-dc.st.com/assets/embedded-docs/index.html

In particular for the NPU in the section: Neural-ART accelerator™ target

 

Have a good day,

Julian

​
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Julian E.
ST Employee

‎2025-08-01 5:23 AM - edited ‎2025-08-01 5:23 AM

Hello @lyannen,

 

The --st-neural-art is to use the NPU.

Without it is a running the model only on the MCU, or said differently only with SW epoch.

But yes it works.

 

I am not sure what the meaning of your error is exactly.

All I can say is that in any case, for the NPU to be used to do the calculation, layers in your model must be in int8.

 

In short:

no --st-neural-art -> MCU

not quantized int8 -> MCU

else NPU if the layer is supported or potential SW fallback (MCU)

 

You can find all the documentation here:

https://stedgeai-dc.st.com/assets/embedded-docs/index.html

In particular for the NPU in the section: Neural-ART accelerator™ target

 

Have a good day,

Julian

​
In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.
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