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STM32F756 USB and WFI

Question asked by donchev.petar on Jul 27, 2017
Latest reply on Aug 1, 2017 by Adam Pearce

I have a problem with STM32F756 USB CDC (HS with FS PHY) device and core sleeping. I isolated all other code and left only the USB driver and main loop calling WFI instruction. If there is no call to WFI, USB is working properly, but if I call WFI in the main loop, USB stops responding. USB clock is not stopped on entering in sleep. Any advise?