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STM32F103 USB Virtual COM problem

Question asked by kk on Oct 25, 2013
Latest reply on Jan 9, 2014 by Clive One
Hi,
I am using olimex kit of  STM32F103RBT6 microcontroller. I am new in USB virtual COM programming.
I am using STM32_USB-FS-Device_Lib_V3.3.0 with Keil MDK-ARM 5.0 IDE.
I opened the precompiled Virtual Com port project from library folder. In DEBUG tool I have selected STM3210b-eval and Rebuilt all files. I flashed the HEX file in my microcontroller.
Then connected the kit USB port with PC. But nothing happening in device manager on PC side.
So please suggest me why this in not working. 

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