Keypad program runs on OS2. Extended not only 3x4 but 4x4,4x5 and 5x5 keys.

Dependencies:   mbed Keypad

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

Revision:
3:8a7b6370956f
Parent:
2:d0ae519c229c
--- a/Keypad.lib	Mon Apr 06 04:59:45 2020 +0000
+++ b/Keypad.lib	Mon Apr 13 02:07:27 2020 +0000
@@ -1,1 +1,1 @@
-https://os.mbed.com/users/kenjiArai/code/Keypad/#0ea41738b560
+https://os.mbed.com/users/kenjiArai/code/Keypad/#f74ca02cdba1