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:
2:aa6fdecebf2b
Parent:
1:abadd53f2072
Child:
4:0564f82dd0ef
--- a/mbed-os.lib	Sat Sep 30 23:29:05 2017 +0000
+++ b/mbed-os.lib	Mon Apr 06 04:57:04 2020 +0000
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-os/#ca661f9d28526ca8f874b05432493a489c9671ea
+https://github.com/ARMmbed/mbed-os/#532654ebb31c7bf79601042a6fa976b85532ef47