USB descriptors larger than 127 bytes don't work (STM32 OTG)

[Giovanni]

HI,

I committed an experimental fix in the *trunk*, could you confirm it solves your problem?

Giovanni

[avrhack]

HI,

I committed an experimental fix in the *trunk*, could you confirm it solves your problem?

Giovanni

Excellent Giovanni thanks. And yes I can confirm that it solves the problem on an STM32F4DISCOVERY with 2.6.3 at least.

Testing I did was to run it against the stable 2.6.3 snapshot (I add tags to your full git repo clone that I keep) and it worked <127, confirmed it failed >127 against 2.6.3. Applied the HLD patch and it worked, then removed that patch, confirmed it failed and then finally applied your LLD (which I made as a quick patch from diffs on your main trunk) and it worked again with a descriptor of length 141.

So I think that's a pretty conclusive test confirming that things fail against 2.6.3 and work with either the HLD patch or your new proper fix of the LLD.

Much appreciated!

[Giovanni]

Very well, I will merge the change in 2.6.4 and 3.0.0.

Thanks,
Giovanni

[avrhack]

Very well, I will merge the change in 2.6.4 and 3.0.0.

Thanks,
Giovanni

Excellent thanks!

[etmatrix]

@avrhack have you an example? I tring with branch 2.6.4 but with my dualcdc example I have an error.

Code: Select all

usb 4-2.1: configuration #1 chosen from 1 choice
usb 4-2.1: can't set config #1, error -110

Single CDC is working without problem.
The error message is different from my previous thread viewtopic.php?f=3&t=699

Thank you

[avrhack]

@avrhack have you an example? I tring with branch 2.6.4 but with my dualcdc example I have an error.

Code: Select all

usb 4-2.1: configuration #1 chosen from 1 choice
usb 4-2.1: can't set config #1, error -110

Single CDC is working without problem.
The error message is different from my previous thread viewtopic.php?f=3&t=699

Thank you

I don't have a simple main.c I can send as it's got a whole load of other stuff in there, but I've attached the usb descriptor / callbacks which are a modified version of Giovani's original single-CDC demo. Hopefully if you compare with yours / plug these in you'll get it working. If not let me know and I'll try and hack up a main.c to go with it that is just the CDC parts

usbcfg.zip

(3.85 KiB) Downloaded 566 times

[etmatrix]

Thank you avrhack for your source, while I see the difference, I have found the problem. SDU2 is not initiliazed, so this make problem to usb init.

[avrhack]

Thank you avrhack for your source, while I see the difference, I have found the problem. SDU2 is not initiliazed, so this make problem to usb init.

Excellent. And if it's any consolation I spent ages trying to figure out why things didn't work - the initialisation and order of that is particularly critical.

Great that you've got it working though as it gives a second confirmation to my testing of Giovani's fix in 2.6.4.