test program for keypad(Extended not only 3x4 but 4x4,4x5 and 5x5 keys)

Dependencies:   Keypad

Fork of study_step0 by Team_PjL

see /users/kenjiArai/notebook/keypadkey-matrix--control/

Revision:
1:abadd53f2072
Parent:
0:1672d0903bdc
Child:
2:aa6fdecebf2b
--- a/mbed-os.lib	Thu Aug 10 20:50:46 2017 +0000
+++ b/mbed-os.lib	Sat Sep 30 23:29:05 2017 +0000
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-os/#4c256f04596179699c4f14b6863b07cc024ca9be
+https://github.com/ARMmbed/mbed-os/#ca661f9d28526ca8f874b05432493a489c9671ea