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USB DFU not visible without ST-LINK connected

Question asked by Myers.Tom.003 on Apr 10, 2017
Latest reply on Apr 11, 2017 by Clive One

I am using STM32F303CCT6 on my own board. During testing I noticed that USB DFU works fine and is detected by the PC, but ONLY when the ST-LINK/V2 is also connected ... When it is not connected the DFU does not show up on my PC?

 

I performed a sanity check and my code runs as expected without the ST-LINK/V2 connected, its just that the USB DFU is not found be the PC without it ...

 

Any suggestions or things to check?

Regards.
T

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