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STM32L Discovery and "STM32F10x and STM32L1xx USB-FS-Device Library"

Question asked by M.E on Nov 16, 2011
Latest reply on Jun 24, 2013 by ftp27
I've failed to start "Custom HID" and "Virtual COM" examples on my discovery.

Wiring: PA11 is connected to USB DATA-; PA12 is connected to USB DATA+. The board itself is powered by USB socket.

I'm using IAR Kickstart, 6.2, Library version 3.3.0. Example project is made compilable by removing core_cm3.X files. Target device is set to STM32L152xB.

Host PC is AMD based, Windows 7(x64), Virtual Com Port driver(1.3.1) from ST is installed.

When device is connected, Windows reports "Unknown device" is connected (Error 43).

What's wrong? Why it does not work? What shall I do to make this working?