CubeMX 4.26 - new problems with STM32L4 USB device

[gbm]

Posted on June 11, 2018 at 16:58

I tried to re-create my 4 well-tested USB device demos with 4.26. While HID mouse and MSC work flawlessly, two others do not work:

CDC - COM port shows in device manager but cannot be opened in terminal; same basic code (just a simple echo) works ok with 4.25.1 and 4.24 (broken PLL programming in 4.25).

HID keyboard - no data received.

I noticed that 'custom HID' used for keyboard was heavily changed in 4.26, and the changes ar not good - DataIn callback was removed - bad

:(

.

[Jerome Godbout]

Just to confirm, 1.11.0 is working fine on my side too. Thanks for th tips. 1.12.0 is breaking everything over here!

[Pavel A.]

<quiote> but once in a while (every 8 minutes or so) it send a 5 byte report even if application layer asked for a single bytes (made a runtime assert of this without problem). The faulty packet was observed with a hardware USB tracer.</quote>

Jerome, can you post a piece of the USB trace with this error, please?

And what is your HID device: something shrink wrapped or self-made?

What is its endpoint max. packet size and report size?

I have a similar problem, but with F4. Pondering if this can be caused by Cube or libraries version.

Thanks,

-- pa