USB HS is disabled in CubeMX when LTDS is enabled on H743VIT6

[Robmar]

I'd like to use both of the Synopsis USB controllers on the STM32H743VIT6, one as device, one as host, but to do that I understand that the other USB controller is accessed through the USB HS device, which is disabled because of the use of LTDC.

Currently I have the FS USB device working as switchable dual-role Host/Device.

I don't know why the HS USB controller is disabled by CubeMX, as the pin outs for HS DM+/- are free.

Is there a way to get around this to use both USB controllers and the LTDC?

[AScha.3]

I tried to have LTDC and both USB , no problem to see:

I am on IDE 1.13.1 .

[Robmar · Accepted solution]

Yes, you're correct, it seems MX Cube was blocked because PB13 was assigned to SPI2_CLK and it wanted to use that for USB_OTH_HS_VBUS, which I assume must be internally hard-wired to the USB-HS controller, I just had to move SPI2_CLK to PA9 to free it.

It looks like I can simply configure both controllers, one as device, one as host, and use the standard routines (modified for CDC to work), would you agree, or are there any hidden complication?

[AScha.3]

Yes, agree.

Anyway OTG (auto switching host/device on a usb port) doesnt work by generating code - you would have to write it yourself... (or find a working example on git).

[Robmar]

Yes, we have that working already, with a custom circuit for the two device/host sense lines and a VBUS power IC.

Well, lets hope this will be an easy sale!