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[TWR-K65F180M] USB VCOM example does not send ACK

Question asked by Baltech AG Baltech AG on Jul 18, 2017
Latest reply on Aug 1, 2017 by Baltech AG Baltech AG



I was trying to get the usb_vcom example from the Kinetis SDK running on my TWR-K65F180M board.

I was able to compile it and get it running but Windows says the USB device could not be regognized.

When looking at the USB trace, I see that the board does not send an ACK to the GetDeviceDescriptor Setup packet.


Has anybody a hint where to start debugging?