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iMX6 - Enable USB OTG port without VBUS connected

Question asked by Simon Willis on Jul 3, 2020
Latest reply on Jul 7, 2020 by Rita Wang

Hi All,


We are trying to bring-up our first  iMX6ULL prototype board. Unfortunately, USB is not being enumerated in Windows, so we cannot use mfgtools. I think the reason for this is because we have forgotten to connect USB_OTG1_VBUS and my understanding of the USB controller is that it uses VBUS to detect a device is connected. Is there any way I can work around this using a JTAG to force the USB into OTG device mode? I have been trying various things to force the USB registers, but have so far been unsuccessful. Any help would be greatly appreciated.