STM32H742IIT6: Using both USB ports as HID hosts?

[PMath.4]

Has anyone any experience of using both USB ports on a H7 as HID hosts? Use is for a mouse and keyboard. Does the ST USB host firmware support using both ports in this way?

I can start work on this but it would be nice to know ahead of time that it has some chance of working

Thanks

[PMath.4]

Well it appears the answer is predictably NO.

The code generated by CubeMX is complete rubbish with the same state variable used by both instances. Fixing this helps but there is still something shared that corrupts the mouse and/or keyboard depending on which is enumerated first.

So no composite device support, no hub support and no ability to use two different HID devices on different USB ports.

The USB support on the STM32 is basically CRAP!!!!

[Pavel A.]

I have not tried it on 'H7, but both USB ports in HID mode definitely work on F4. So there's a very good chance it works on H7 too.

Composite device is possible too.

Hub support is more complicated - rumors are that it works with 3rd party software drivers (Segger for one).

The quality of provided USB examples and generated code is a different issue...

-- pa

[PMath.4]

Both ports work for me but not at the same time with both as HID hosts. Both enumerate but then USB processing locks up. Either works individually on either port

USB Device Connected
USB Device Reset Completed
PID: 2h
VID: 1c4fh
Address (#1) assigned.
Manufacturer :
Product : USB Keyboard
Serial Number : N/A
Enumeration done.
This device has only 1 configuration.
Default configuration set.
Device remote wakeup enabled
Switching to Interface (#0)
Class : 3h
SubClass : 1h
Protocol : 1h
KeyBoard device found!
HID class started.
USB Device Connected
USB Device Reset Completed
PID: 84h
VID: 45eh
Address (#1) assigned.
Manufacturer : Microsoft
Product : Basic Optical Mouse
Serial Number : N/A
Enumeration done.
This device has only 1 configuration.
Default configuration set.
Device remote wakeup enabled
Switching to Interface (#0)
Class : 3h
SubClass : 1h
Protocol : 2h
Mouse device found!
HID class started.

[Pavel A.]

Yes. as you've already found need to decouple states of both instances. Takes some digging in the code...

-- pa