https://devzone.nordicsemi.com/f/nordic-q-a/25298/nrf52840-usb-msd-without-optimizationsHello, I am currently trying to make an MSD RAM disk with nrf52840 nRF5_SDK_14.0.0 with O0 optimization level. And had no success. For some reason in Keil example O3 is used. If I set O0 then it stops working. It looks like EP1 gets stalled and noen-USTelligent Community 13Thu, 21 Sep 2017 12:24:00 GMThttps://devzone.nordicsemi.com/thread/99681?ContentTypeID=1Thu, 21 Sep 2017 12:24:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:525d7f70-17d3-4135-8d03-695853746395Sigurd<p>Hi,</p> <p>We are aware of the issue, and it will be fixed in the upcoming release of SDK 14.1, where we have reworked and improved the whole interface management in the USB device library.</p><div style="clear:both;"></div>