Distinguish between disconnect and suspend events on i.MX28 in USB Device mode

[FredrikMoller]

When the USB cable is removed from the i.MX28 EVK board, an interrupt is triggered. The HW_USBCTRL_USBSTS register in the USB controller block indicates that it is the SLI interrupt (DC Suspend). When a Suspend is received from host, the same interrupt is generated. How do I distinguish between these two kinds of events?

I'm not using Linux.

[igorpadykov]

Hi Frederik

in device mode 5V is provided by host on usb connector,

this can be detected using sect.2.2.2.1 5-V detection methods AN4199

application note http://cache.freescale.com/files/32bit/doc/app_note/AN4199.pdf

Best regards

igor

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[FredrikMoller]

Thanks for the reply.

However, that won't work for me as I get 5V from wall, meaning that 5V will always be detected whether USB cable is connected or not.