Hello! When I'll try to compile on Keil 4.21 (RL-ARM 4.13) example (path: Keil\ARM\Boards\ST\STM3220F-EVAL\RL\USB\Device\HID) or each other from folder "USB" I had permamently one error - "usbd_STM32F2xx_FS.c(558): warning: #223-D: function "usbd_reset_core" declared implicitly", and same errors list with other "functions not founded". Reason of it - in my folder C:\Keil\ARM\RL\USB\ there is NOT FULL library USB_CM3.lib, it contain just only Host part of functions but not Device part. Source code is not full too. Maybe the full version of this library is exist? Can anyone try to compile it at yourth PC? Or just look on USB_CM3.lib size (path is C:\Keil\ARM\RV31\LIB), my file size is 499kB, I think it must be larger.