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:
5:53fb9eed6b67
Parent:
3:0c888cad9376
--- a/Keypad.lib	Sat Aug 01 07:49:39 2020 +0000
+++ b/Keypad.lib	Thu Feb 18 08:15:37 2021 +0000
@@ -1,1 +1,1 @@
-https://os.mbed.com/users/kenjiArai/code/Keypad/#f74ca02cdba1
+https://os.mbed.com/users/kenjiArai/code/Keypad/#8929ce2f393c