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problem with USB migrating from stm32f072 to stm32f042

Question asked by m.h on Nov 2, 2016
Latest reply on Nov 3, 2016 by m.h
I have a USB CDC project that works fine with the STM32F072-DISCO board, but when I try to migrate the code over to my own board with an STM32F042 on it the device shows up as an "STM Device in DFU Mode" instead of a COM port in my Windows device manager.  The code is the same; I've just changed the target processor in my project settings.  Are there any differences in how the USB works between the two processors (STM32F072RB vs STM32F042K6) that I need to account for?  I'm using the STM32Cube firmware v1.6.0