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+# Getting started with the USB serial test on mbed OS
+
+This guide reviews the steps required to get the firmware working on an mbed OS platform.
+
+Please install [mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli).
+
+## Import the example application
+
+From the command-line, import the example:
+
+```
+mbed import mbed-os-usbserial-test
+cd mbed-os-usbserial-test
+```
+
+### Now compile
+
+Invoke `mbed compile`, and specify the name of your platform and your favorite 
+toolchain (`GCC_ARM`, `ARM`, `IAR`). For example, for the Bluepill STM32F103C8
+and the GNU C compiler :
+
+```
+mbed compile -m BLUEPILL_F103C8 -t ARM
+```
+
+Your PC may take a few minutes to compile your code. At the end, you see the 
+some statistics about the compiled firmware.
+
+```
+[TBD]
+```
+
+### Program your board
+
+Connections:
+
+    ST-Link V2  STM32F103 (blue pill) SWD connector
+    GND         GND
+    SWCLK       SWCLK (PA14)
+    SWDIO       SWDIO (PA13)
+    3V3         3V3
+
+Flash firmware:
+
+    st-flash --reset write ./BUILD/NUCLEO_F103RB/GCC_ARM/*.bin 0x8000000
+
+## References
+
+If you have problems, please review the [documentation](https://os.mbed.com/docs).
+
+* https://os.mbed.com/users/hudakz/code/USBDevice_STM32F103/
+* https://os.mbed.com/users/hudakz/code/STM32F103C8T6_USBSerial/
+* http://wiki.stm32duino.com/index.php?title=Blue_Pill
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