USB_MSD + Fat32 + SD card

Hi Dialog,

I have a worknig SPI driver for the SDHC card with FATFS layer. I can read/write files on SD correctly and then see it on PC (if SD card injected separately). Now I want to connect SD card via MCU to PC and provide direct access to files on SD card via MSD interface. What is the minimal required actions order for configure USB MSD in this mode? May be exist some more detailed documentation or application example about how to insert the custom i/o layer to to MSD?

Notes.
1. I defined the state_cb_hook, where inserted the printing of logging info about usb states. When I start my MSD code, I see that USB walk through Attached, Ready, Addressed states and finish in Configured state. But my laptop on Ubuntu 20.04 does not see some injected devices.
2. I defined all USB_MSD_STORAGE_API functions. But as I could see only init and is_present routines has been called. Additionally init called only once, then is_medium_present called periodically.
No read/write functions was called.
3. I add driver by instruction like this in USBD_X_Config:
USBD_AddDriver(&USB_Driver_DialogSemi_DA1469x);
USBD_SetISRMgmFuncs(MSD_USB_ENABLE_ISR_FUNC, NULL, NULL);
4. Device info copied from SMSD example. And also LunInfo. Endpoints assigned in runtime correctly.
5. I tride to use USB_MSD_StorageByName as API but it compiles as undefined reference...
6. Also I tried to work with SMSD but it support Fat12 only, as I understand.

Thanks

Feodor