use a digital input in pull up mode to read a signal from a microswitch and toggle a LED

Dependencies:   mbed

Revision:
0:9330a73f2ea2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun May 14 19:19:34 2017 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/users/mbed_official/code/mbed/builds/4eea097334d6
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