Minimum SDK version for USBD?

[Julie H]

I'm still using SDK 12.3 on a nRF52840 product and am bashing my head against the wall because of issues with the USB driver. The current problem is all manner of hard faults trying to enable the USB driver itself. For example, the __DSB() macro in nrf_usbd_pullup_enable() causes a hard fault the first time I invoke app_usbd_start().

I'm also using s132. I know I need to update all the things, but I'm putting that off until I run into a wall and upgrading is easier than not.

[Bjørn Kvaale]

Hi Julie. Which version of the nrf52840 preview development kit do you have?

[Julie H]

I don't. I'm using a device prototype. I do have a PCA10056 lying around, but the last time I tried getting USB CDC running on that device, with most of our product firmware, it likewise went no where.

[Julie H]

And speaking of bugs, I've started the migration to SDK 14.0. Where is a good place to report bugs? Because 14.0 has them.

[Bjørn Kvaale]

We have a page with the most common bugs here. But I would just add a new question in devzone. That way, one of us application engineers in tech support will take a look at your issue and add the bug to the list of known bugs. Hopefully your bug will then get fixed in the next sdk version.

[Bjørn Kvaale]

Regarding your other question (i.e. usb driver), can you take a look at the usbd_hid_generic example under the peripheral folder in SDK 12.3 (or in SDK 14)? Could you please see if that example works on your device prototype. If the usb driver doesn't work, I think it's best if you could open up a myPage case. They will be able to help you further there. Hope that helps a bit!