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STM32F103 when powered from USB - not seen as Virtual COM Port

Question asked by Maxim Petrenko on Jul 14, 2017
Latest reply on Jul 14, 2017 by Vangelis Fortounas

I am trying to use F103c8t6 with USB in virtual COM port mode, using CubeMX tools. If the device is powered from an external source before USB connecting - when connect USB cable it is recognized by Windows normally. But when I try to power it from USB only, it is seen as an unknown device when connect USB cable. Code has been generated with "SELF_POWERED" option in CubeMX switched off.

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