https://devzone.nordicsemi.com/f/nordic-q-a/35034/usb-ep0datadone-event-never-generatedI get to the point of having the EP0SETUP event being generated, I check BMREQUEST and WVALUEH and see that it&#39;s a request for the device descriptor,this is on windows and the WLENGTHH is 64 bytes. I load the device descriptor into EPIN[0].PTR and theen-USTelligent Community 13Fri, 08 Jun 2018 06:54:16 GMThttps://devzone.nordicsemi.com/thread/135287?ContentTypeID=1Fri, 08 Jun 2018 06:54:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:62b94426-d137-4d82-bebd-4ef975c2964fStian R&#248;ed Hafskjold<p>There are so many issues with the USB on eng. A that it is close to non functional. I think you&#39;re better off using the stack in the SDK.</p> <p><a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.EngA.errata/anomaly_840_104.html">http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.EngA.errata/anomaly_840_104.html</a> </p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/134617?ContentTypeID=1Mon, 04 Jun 2018 17:48:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1950eb7a-7f72-442b-b5b7-214cfb93fe47aero<p>Hi, I&#39;m using engineering A, I don&#39;t see anything in the errata about EP0DATADONE. I&#39;ve only tried one of the SDK examples and it works fine.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/134558?ContentTypeID=1Mon, 04 Jun 2018 12:31:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0b31ba06-d570-4111-ac42-354ffc16d8c7Stian R&#248;ed Hafskjold<p>Hi, which chip revision are you using? Have you been testing with any SDK examples? There are a few erratas for the USB peripheral which are fixed in the SDK drivers, so I think you should use this as a starting point. You can check the errata <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/errata52840.html?cp=2_0_1">here</a></p><div style="clear:both;"></div>