Issue with USB Video Class Initialization Code Generation in MX Version 6.11.1

[saikumar]

Hello,

I'm currently using MX version 6.11.1 to generate code for the STM32U5G9ZJT6Q for the USB Video Class (UVC). However, I've noticed that the generated function for USB initialization, MX_USBX_Device_Init(), is mostly empty, and I'm unable to find a starting point for my implementation.

The generated code for the UVC initialization is as follows:

UINT MX_USBX_Device_Init(VOID)
{
UINT ret = UX_SUCCESS;
UX_PARAMETER_NOT_USED(ux_device_byte_pool_buffer);
return ret;
}

In contrast, when I generate the code for the CDC class, it includes comprehensive initializations and is structured as shown below:

UINT MX_USBX_Device_Init(VOID)
{
UINT ret = UX_SUCCESS;
UCHAR *device_framework_high_speed;
UCHAR *device_framework_full_speed;
ULONG device_framework_hs_length;
ULONG device_framework_fs_length;
ULONG string_framework_length;
ULONG language_id_framework_length;
UCHAR *string_framework;
UCHAR *language_id_framework;
UCHAR *pointer;
/* USER CODE BEGIN MX_USBX_Device_Init0 */
/* USER CODE END MX_USBX_Device_Init0 */
pointer = ux_device_byte_pool_buffer;
/* Initialize USBX Memory */
if (ux_system_initialize(pointer, USBX_DEVICE_MEMORY_STACK_SIZE, UX_NULL, 0) != UX_SUCCESS)
{
/* USER CODE BEGIN USBX_SYSTEM_INITIALIZE_ERROR */
return UX_ERROR;
/* USER CODE END USBX_SYSTEM_INITIALIZE_ERROR */
}
/* Get Device Framework High Speed and get the length */
device_framework_high_speed = USBD_Get_Device_Framework_Speed(USBD_HIGH_SPEED, &device_framework_hs_length);
/* Get Device Framework Full Speed and get the length */
device_framework_full_speed = USBD_Get_Device_Framework_Speed(USBD_FULL_SPEED, &device_framework_fs_length);
/* Get String Framework and get the length */
string_framework = USBD_Get_String_Framework(&string_framework_length);
/* Get Language Id Framework and get the length */
language_id_framework = USBD_Get_Language_Id_Framework(&language_id_framework_length);
/* Install the device portion of USBX */
if (ux_device_stack_initialize(device_framework_high_speed, device_framework_hs_length, device_framework_full_speed, device_framework_fs_length, string_framework, string_framework_length, language_id_framework, language_id_framework_length, USBD_ChangeFunction) != UX_SUCCESS)
{
/* USER CODE BEGIN USBX_DEVICE_INITIALIZE_ERROR */
return UX_ERROR;
/* USER CODE END USBX_DEVICE_INITIALIZE_ERROR */
}
/* Initialize the cdc acm class parameters for the device */ cdc_acm_parameter.ux_slave_class_cdc_acm_instance_activate = USBD_CDC_ACM_Activate; cdc_acm_parameter.ux_slave_class_cdc_acm_instance_deactivate = USBD_CDC_ACM_Deactivate; cdc_acm_parameter.ux_slave_class_cdc_acm_parameter_change = USBD_CDC_ACM_ParameterChange;
/* USER CODE BEGIN CDC_ACM_PARAMETER */
/* USER CODE END CDC_ACM_PARAMETER */
/* Get cdc acm configuration number */
cdc_acm_configuration_number = USBD_Get_Configuration_Number(CLASS_TYPE_CDC_ACM, 0);
/* Find cdc acm interface number */
cdc_acm_interface_number = USBD_Get_Interface_Number(CLASS_TYPE_CDC_ACM, 0);
/* Initialize the device cdc acm class */
if (ux_device_stack_class_register(_ux_system_slave_class_cdc_acm_name, ux_device_class_cdc_acm_entry, cdc_acm_configuration_number, cdc_acm_interface_number, &cdc_acm_parameter) != UX_SUCCESS)
{
/* USER CODE BEGIN USBX_DEVICE_CDC_ACM_REGISTER_ERROR */
return UX_ERROR;
/* USER CODE END USBX_DEVICE_CDC_ACM_REGISTER_ERROR */
}
/* USER CODE BEGIN MX_USBX_Device_Init1 */
/* USER CODE END MX_USBX_Device_Init1 */
return ret;
}

Why is there such a significant difference in the initialization function when generating code for UVC compared to CDC? Is there something I might be missing in the configuration, or is this a known issue with the MX version?

Thank you for your assistance!