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Where Does a USB Device ACK Requests From Host?

Question asked by Joshua on Mar 19, 2014
Latest reply on Mar 19, 2014 by sung.chen_chung
I've got a STM32F427 running as a USB device (HS, if that matters). Using a USB analyzer, I can see that the request from the host to set a device address is getting to the micro, but it fails to ACK the SETUP packet. I can't locate the function in the standard library that generates the ACK, nor does it seem to be something simply tacked on to the end of processing requests (such as USBD_SetAddress). Can anyone clarify where this is done?