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Wired USB DP/DM Backwards, Killed USB?

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I'm calling in the MSP430 USB specialists.

 

On Rev A of my standalone AIS Receiver board, I connect DP/DM (D+/D-) backwards to the MSP43F5508. After I realized the error, I cut the traces and patched it up with two short wires. Unfortunately the device is still not enumerated by the host.

 

I use TI's USB library. USB_setup() completes successfully, but USB_connectionState() stays in the enumerating state forever while nothing happens on the PC.

 

Could it be, that I killed the USB data inputs by having DP and DM connected the wrong way around?

 

Any other suggestions on how to debug this situation?


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