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+*****************************************************************************
+** ChibiOS/HAL - USB-CDC (IAD descriptors) driver demo for STM32F4xx.      **
+*****************************************************************************
+
+** TARGET **
+
+The demo runs on an Sipeed Longan Nano GD32VF103CBT6 board.
+
+** The Demo **
+
+The application demonstrates the use of the GD32VF103CBT6 USB driver.
+
+** Build Procedure **
+
+The demo has been tested using the riscv-gnu-toolchain https://github.com/riscv/riscv-gnu-toolchain. 
+Flash using a recent dfu-util version wich has the fixes for the DFU Bootloader of the GD32VF103 https://sourceforge.net/projects/dfu-util/.
+
+```shell
+make
+dfu-util -d 28e9:0189 -s 0x08000000:leave -D ./build/usbcdc.bin -w
+```
+
+** Notes **
+
+Some files used by the demo are not part of ChibiOS/RT but are copyright of
+ST Microelectronics and are licensed under a different license.
+Also note that not all the files present in the ST library are distributed
+with ChibiOS/RT, you can find the whole library on the ST web site:
+
+                             http://www.st.com