USB Standalone AzureRTOS STM32WBA

[SnoZek]

Hello,
As a lot of people here, i'm trying to implement USB in standalone mode (bare metal, no OS used).

• I'm using NUCLEO-STM32WBA65RI board.
• CubeDE 1.19
• CubeMX 6.15.0

 still can't make it work. I'm looking for help. I checked a lot of forum posts, a lot of github pages.
I based myself on :

https://github.com/STMicroelectronics/x-cube-azrtos-h7/blob/dev/usbx/Projects/NUCLEO-H723ZG/Applications/USBX/Ux_Device_CDC_ACM_Standalone/USBX/App/app_usbx_device.c
and tried to implement the AzureRTOS USBX standalone version
Here is my Cube MX configuration :

Clock USB :

I only used X-CUBE-AZRTOS-WB and desactivated USBX :

 Using buffer <10*1024 would rise a memory error flag in ux_device_stack_initialize() : 
The rest is default configuration.

 

Then USB_OTG_HS : Device_Only and :

Then i generated the code,
I added :

  if(MX_USBX_Device_Init() != HAL_OK)
  {
	  for(;;);
  }

And inside of it :

  /* USER CODE BEGIN MX_USBX_Device_Init1 */
  USBX_APP_Device_Init();
  /* USER CODE END MX_USBX_Device_Init1 */

And inside of it :

  /* USER CODE BEGIN USB_Device_Init_PreTreatment_1 */

  /* Set Rx FIFO */
  HAL_PCDEx_SetRxFiFo(&hpcd_USB_OTG_HS, 0x200);

  /* Set Tx FIFO 0 */
  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 0, 0x10);

  /* Set Tx FIFO 1 */
  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 1, 0x10);

  /* Set Tx FIFO 2 */
  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 2, 0x20);
  /* USER CODE END USB_Device_Init_PreTreatment_1 */

Inside of MX_USB_OTG_HS_PCD_Init() i added :

  /* USER CODE BEGIN USB_OTG_HS_Init 1 */
  memset(&hpcd_USB_OTG_HS, 0x0, sizeof(PCD_HandleTypeDef));
  /* USER CODE END USB_OTG_HS_Init 1 */

 Inside of _ux_utility_time_get() i added :

  /* USER CODE BEGIN _ux_utility_time_get */
  time_tick = HAL_GetTick();
  /* USER CODE END _ux_utility_time_get */

 I also implemented the TX and RX function but my code is blocking before that.
Inside of MX_USB_OTG_HS_PCD_Init -> HAL_PCD_Init -> USB_CoreInit -> USB_CoreReset

  do
  {
    count++;

    if (count > HAL_USB_TIMEOUT)
    {
      return HAL_TIMEOUT;
    }
  } while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_CSRSTDONE) == 0U);

 
Does anyone succeed to implement USBX with STM32WBA65 in bare metal ?

Thanks for your help,

Yvan

[jmk]

Hi @SnoZek,

I faced a similar issue and spent some time figuring it out. I'm using STM32CubeMX 6.17 and the same board.

Make sure that your code calls the following function:

__HAL_RCC_SYSCFG_CLK_ENABLE();

If it does not appear in your project, add this call inside the /* USER CODE BEGIN MspInit 0 */ section of the void HAL_MspInit(void) function.

Here is helpful resource to resolve usb related issues.
https://community.st.com/t5/stm32-mcus/faq-troubleshooting-a-usb-core-soft-reset-stuck-on-an-stm32/ta-p/803224

[SnoZek]

Hi @jmk ,

Thanks for your answer,
I added the line and it didn't block anymore.
Now the code is running and in the while(1) :

	  USBX_Device_Process(NULL);

calling :

  ux_device_stack_tasks_run();

Now, my PC (Windows) see the USB device which is already a big step but with an error : "Device descriptor request failed"

Thanks for your help,

[FBL]

Hi @SnoZek 

Glad you fixed the first issue.

Now, it seems you need to check your configuration. You can check this example as reference.

[SnoZek · Accepted solution]

Hey,

I finally succeed to make it work.
The point is : by default in X-CUBE-AZRTOS-WB we have this :

 and if i undestood corectly, ENDPOINT_IN_CMD_ADDR should be different of IN and OUT ADDR.
So i just modify like it :
USBD_CDCACM_ENDPOINT_IN_CMD_ADDR 2
And then it worked.

I also used in the end those values for the endpoint :

  /* Set Rx FIFO */
  HAL_PCDEx_SetRxFiFo(&hpcd_USB_OTG_HS, 0x200);

  /* Set Tx FIFO 0 */
  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 0, 0x40); // EP0

  /* Set Tx FIFO 1 */
  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 1, 0x80); // CDC IN

  /* Set Tx FIFO 2 */
  HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 2, 0x10); // CDC CMD

thanks for your help,
If someone need i can share my project of USB Standalone for STM32WBA65
Yvan