With this test, you can tie external TXD and RXD together, and on the USB console, see the characters entered be echo'd back. This is effectively a loopback test verifying the external hardware interface, through the USB console interface.

Dependencies:   C027-REVB mbed

Revision:
0:7ac9848b2e4b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Dec 13 23:45:09 2013 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/a9913a65894f
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