I have tried USB examples for Stm32F070, F401, F407 Black board and calling a single "CDC_Transmit_FS" function to print a string but none is working. The hcdc->TxState value is some garbage big value so it always stay busy and also not getting interrupts for USB receive as I have put break points in it too. The STM32 device show up as "composite" instead of VCP.
For configuration it is RCC->Bypass Clk, USB connectivity->Device Only, USB_Device->VCP, heap size->0x1000.
