Hard fault interrupt on ai_network_run( ) funtion.

[SKim.9]

Hi,

I created my own model and tried to import it into the STM32L476 MCU.

When I execute the ai_network_run( ) function, I got the hard fault interrupt.

Here is the function below.

( I refered the code from here :

https://wiki.st.com/stm32mcu/wiki/AI:How_to_perform_motion_sensing_on_STM32L4_IoTnode)

static void AI_Run(float *pIn, float *pOut)
{
  ai_i32 batch;
  ai_error err;
 
  /* Update IO handlers with the data payload */
  ai_input[0].data = AI_HANDLE_PTR(pIn);
  ai_output[0].data = AI_HANDLE_PTR(pOut);
 
  batch = ai_network_run(network, ai_input, ai_output);
 
  if (batch != 1)
  {
    err = ai_network_get_error(network);
    printf("AI ai_network_run error - type=%d code=%d\r\n", err.type, err.code);
    Error_Handler();
  }
}

I have checked the 'ai_input' and 'ai_output' values and they all pointed well.

 

Here is the main loop.

while (1)
{
	AccelReadValues(0x32, 6);
 
	x = ((AccelData[1] << 8) | AccelData[0]);
	y = ((AccelData[3] << 8) | AccelData[2]);
	z = ((AccelData[5] << 8) | AccelData[4]);
 
	ACC_Value_Raw.AccX = (x * .039);
	ACC_Value_Raw.AccY = (y * .039);
	ACC_Value_Raw.AccZ = (z * .039);
 
	HAL_Delay(50);
 
	aiInData[write_index++] = ACC_Value_Raw.AccX;
	aiInData[write_index++] = ACC_Value_Raw.AccY;
	aiInData[write_index++] = ACC_Value_Raw.AccZ;
 
        // AI_NETWORK_IN_1_SIZE = (24 * 3 * 1)
	if (write_index >= AI_NETWORK_IN_1_SIZE)
	{
	    printf("Running inference\r\n");
 
	    AI_Run(aiInData, aiOutData);
 
	    /* Output results */
	    for (uint32_t i = 0; i < AI_NETWORK_OUT_1_SIZE; i++)
	    {
	    	printf("%8.6f ", aiOutData[i]);
	    }
 
	    uint32_t class = argmax(aiOutData, AI_NETWORK_OUT_1_SIZE);
	    printf(": %d - %s\r\n", (int) class, activities[class]);
	    write_index = 0;
	}
 
	//MX_X_CUBE_AI_Process();
  }

I read the X, Y, and Z of the accelerometer sensor data.

Do you have any ideas on how I could handle this situation?

Thanks,

[SKim.9]

Okay, Here is my AI_Init and AI_Run function.

I didn't modify any code from the WIKI page.

static void AI_Init(void)
{
  ai_error err;
 
  /* Create a local array with the addresses of the activations buffers */
  const ai_handle act_addr[] = { activations };
  /* Create an instance of the model */
  err = ai_network_create_and_init(&network, act_addr, NULL);
  if (err.type != AI_ERROR_NONE) {
    printf("ai_network_create error - type=%d code=%d\r\n", err.type, err.code);
    Error_Handler();
  }
  ai_input = ai_network_inputs_get(network, NULL);
  ai_output = ai_network_outputs_get(network, NULL);
}

static void AI_Run(float *pIn, float *pOut)
{
  ai_i32 batch;
  ai_error err;
 
  /* Update IO handlers with the data payload */
  ai_input[0].data = AI_HANDLE_PTR(pIn);
  ai_output[0].data = AI_HANDLE_PTR(pOut);
 
  printf("------------------\n");
  batch = ai_network_run(network, ai_input, ai_output);
  printf("a----------------\n");
  if (batch != 1) {
    err = ai_network_get_error(network);
    printf("AI ai_network_run error - type=%d code=%d\r\n", err.type, err.code);
    Error_Handler();
  }
}

[Laurent]

Hello

I have implemented the wiki on a set up as close as yours : Nucleo-L476RG + IKS01A3 with the LSM6DS0 accelerometer

and all run fine without any hardfault ...

by the way, did you try to run the provided model in the wiki (https://github.com/STMicroelectronics/stm32ai/raw/master/AI_resources/HAR/model.h5) ?

best regards

L.

[Laurent]

Also, one question, in your main , do you initialize the AI twice ?

...

MX_X_CUBE_AI_Init();

AccelInit();

AI_Init();

...

I think that MX_X_CUBE_AI_Init() is code generated for application template ... but you are using AI_Init() provided by the wiki.