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ARM: USB-CDC soft disconnect

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Hi All, I am working with STM32F103 board. I use USB Virtual Com port(USB-CDC) for communicating with a PC. It is working fine. But when I reset the STM board or reload the program, USB communication is not happening. Is there a way to re-enumerate USB with the PC once the reset happens. In a different thread, I saw that USB-OTG has this feature available. I am looking for a solution for USB-CDC. Any help will be much appreciated. Thanks

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