serial port output, basic, nucleo STM32F401Re board

Dependencies:   mbed-src

Revision:
0:1dac8a6d8994
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-src.lib	Fri Sep 04 08:29:15 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed-src/#ade316e51a72