Arduino_DigitalReadSerial sample code ported.

Dependencies:   mbed

Revision:
0:ca7d67d6dd20
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Sep 03 11:07:05 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/9327015d4013
\ No newline at end of file