Support multiple CustomHID interfaces with CompositeBuilder

[XelaRellum]

Right now there is one report descriptor size for all CustomHID interfaces, defined with USBD_CUSTOM_HID_REPORT_DESC_SIZE.

To adress this, the structure USBD_CUSTOM_HID_ItfTypeDef should contain a field with the actual report descriptor size.

[TOUNSTM]

Hello @XelaRellum,

Thank you for this report. We will get back to you as soon as we analyze it further. This may take some time. Thank you for your comprehension.

With Regards,

[ALABSTM]

Hi @XelaRellum,

Please excuse this delayed reply.

Regarding the size of the report descriptor, I see this line in the USBD_CUSTOM_HID_Setup() function.

https://github.com/STMicroelectronics/stm32_mw_usb_device/blob/7b5e6886d2f11ad15d2b46364e8a96984358f639/Class/CustomHID/Src/usbd_customhid.c#L409

Structure member wLenght is defined in the structure below.

https://github.com/STMicroelectronics/stm32_mw_usb_device/blob/7b5e6886d2f11ad15d2b46364e8a96984358f639/Core/Inc/usbd_def.h#L197-L204

Maybe the report size could be defined there, in the frame of the setup request? Doing so, the size would be any value chosen at application level, and not necessarily the one defined by USBD_CUSTOM_HID_REPORT_DESC_SIZE.

With regards,

[ALABSTM]

ST Internal Reference: 173362

[ALABSTM]

Hi again,

Proposal forwarded to our development teams.

With regards,