File list (Check if you may need any files):
USBSerial_HelloWorld\mbed.bld
....................\main.cpp
....................\USBSerial_HelloWorld.uvproj
....................\USBDevice.lib
....................\USBSerial_HelloWorld.uvopt
....................\.hgignore
....................\GettingStarted.htm
....................\mbed\analogout_api.h
....................\....\wait_api.h
....................\....\ethernet_api.h
....................\....\DigitalOut.h
....................\....\PortInOut.h
....................\....\I2C.h
....................\....\i2c_api.h
....................\....\serial_api.h
....................\....\BusInOut.h
....................\....\port_api.h
....................\....\CAN.h
....................\....\Ticker.h
....................\....\sleep_api.h
....................\....\gpio_irq_api.h
....................\....\can_api.h
....................\....\PortOut.h
....................\....\FileBase.h
....................\....\mbed_debug.h
....................\....\rtc_time.h
....................\....\PwmOut.h
....................\....\can_helper.h
....................\....\FileHandle.h
....................\....\pwmout_api.h
....................\....\platform.h
....................\....\pinmap.h
....................\....\DigitalInOut.h
....................\....\spi_api.h
....................\....\rtc_api.h
....................\....\BusIn.h
....................\....\SPI.h
....................\....\analogin_api.h
....................\....\FileLike.h
....................\....\Timer.h
....................\....\Ethernet.h
....................\....\FunctionPointer.h
....................\....\TimerEvent.h
....................\....\mbed_interface.h
....................\....\Serial.h
....................\....\DigitalIn.h
....................\....\SPISlave.h
....................\....\mbed.h
....................\....\AnalogOut.h
....................\....\Timeout.h
....................\....\gpio_api.h
....................\....\PortIn.h
....................\....\InterruptIn.h
....................\....\us_ticker_api.h
....................\....\DirHandle.h
....................\....\error.h
....................\....\LocalFileSystem.h
....................\....\semihost_api.h
....................\....\FileSystemLike.h
....................\....\FilePath.h
....................\....\AnalogIn.h
....................\....\toolchain.h
....................\....\Stream.h
....................\....\BusOut.h
....................\....\I2CSlave.h
....................\....\.hg\keep.me
....................\USBDevice\.hgignore
....................\.........\USBSerial\USBSerial.h
....................\.........\.........\USBSerial.cpp
....................\.........\.........\CircBuffer.h
....................\.........\.........\USBCDC.cpp
....................\.........\.........\USBCDC.h
....................\.........\...Audio\USBAudio_Types.h
....................\.........\........\USBAudio.h
....................\.........\........\USBAudio.cpp
....................\.........\...HID\USBHID.cpp
....................\.........\......\USBMouseKeyboard.cpp
....................\.........\......\USBMouse.h
....................\.........\......\USBHID.h
....................\.........\......\USBMouseKeyboard.h
....................\.........\......\USBKeyboard.cpp
....................\.........\......\USBMouse.cpp
....................\.........\......\USBHID_Types.h
....................\.........\......\USBKeyboard.h
....................\.........\...MSD\USBMSD.cpp
....................\.........\......\USBMSD.h
....................\.........\...Device\USBDevice.h
....................\.........\.........\USBDevice.cpp
....................\.........\.........\USBHAL_LPC17.cpp
....................\.........\.........\USBDescriptor.h
....................\.........\.........\USBHAL.h
....................\.........\.........\USBDevice_Types.h
....................\.........\.........\USBEndpoints_LPC11U.h
....................\.........\.........\USBEndpoints_KL25Z.h
....................\.........\.........\USBHAL_KL25Z.cpp
....................\.........\.........\USBEndpoints_LPC17_LPC23.