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:
3:0c888cad9376
--- a/Keypad.lib	Sat Sep 30 23:29:05 2017 +0000
+++ b/Keypad.lib	Mon Apr 06 04:57:04 2020 +0000
@@ -1,1 +1,1 @@
-https://os.mbed.com/users/kenjiArai/code/Keypad/#ed0ad90ad734
+https://os.mbed.com/users/kenjiArai/code/Keypad/#0ea41738b560