STM32H7S78-DK: USBX PIMA / MTP is not supported in standalone mode

[polEscudero]

Dear community members,

STM32H7S78-DK: USBX standalone (CDC ACM + PIMA) works in HS now but PIMA / MTP is not supported in standalone mode in USBX

Currently, it is not possible to use the PIMA/MTP class in USBX in standalone mode (without an RTOS). The MTP implementation depends on Azure RTOS ThreadX, and there is no official support for running it in bare-metal configurations.

When attempting to use it in standalone mode, the stack returns:

#define UX_FUNCTION_NOT_SUPPORTED                                       0x54

This is also reflected in the official documentation:

USBX Getting Started – Bare-metal support matrices 

[FBL]

Hello @polEscudero 

Indeed, USBX PIMA /MTP is not supported in standalone mode in current STM32CubeH7RS. It is planned to be supported in STM32CubeC5.