Hello,
I am trying to run Validate on target on a NUCLEO-N657X0-Q board using X-CUBE-AI 10.2.0, but it consistently fails. I would appreciate any guidance.
Environment:
- Board: NUCLEO-N657X0-Q
- X-CUBE-AI: 10.2.0
- STM32CubeMX / STM32CubeIDE: latest
- OS: Windows 11
- Model: ONNX (MobileNetV4-Small based, input [1,4,224,224] float32, 2 outputs)
What works:
- Analyze: OK (Flash 46.75MB, RAM 3.78MB)
- Generate: OK
- Validate on desktop: OK (acc=100%, nse=1.0)
- Board detected: ST-Link Virtual COM Port on COM5
- Firmware flash reports: Start operation achieved successfully
Problem:
When running Validate on target via STM32CubeMX:
Running the ST.AI c-model (AI RUNNER)...(name=network, mode=TARGET)Proto-buffer driver v2.0 (msg v3.1) (Serial driver v1.0 - COM5:921600)Warning: C-network signature checking is skipped on ST Neural-ART NPULOAD ERROR: STM32 - read timeout 50000msValidation ended
When running stedgeai CLI directly (after manual build via n6_loader.py):
E200(ValidationError): TARGET: Unable to bind the ST.AI runtime with "network" c-modelE801(HwIOError): Invalid firmware - COM5:921600
When running n6_loader.py directly:
Flashing memory xSPI2 -- 48,897.140 kBFlashing memory xSPI2 -- return code ERRORStart operation did not achieve successfully
What I have investigated:
- The Projects folder in X-CUBE-AI 10.2.0 only contains STM32N6570-DK. There is no dedicated project for NUCLEO-N657X0-Q, although n6_loader.py does have a --build-config N6-Nucleo option.
- UART pin configuration in misc_toolbox.c is already set to PE5/PE6 (USART1), which matches the Nucleo board's ST-Link Virtual COM Port.
- I modified RISAF_Config() in misc_toolbox.c to include set_risaf_default(RISAF11_S) for the Nucleo board (hyperRAM), but the issue persists.
- Running python -c "import serial; s=serial.Serial('COM5',921600,timeout=5); print(s.read(1000))" after firmware flash returns b'' — the board sends nothing over UART.
Questions:
- What is the correct procedure to use Validate on target on NUCLEO-N657X0-Q with X-CUBE-AI 10.2.0?
- Why does xSPI2 flashing fail with return code ERROR?
- What causes E801(HwIOError): Invalid firmware when running stedgeai CLI directly?
- Is there a dedicated NPU_Validation project for NUCLEO-N657X0-Q, or do I need to manually port the STM32N6570-DK project?
Thank you in advance.
