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:
4:0564f82dd0ef
--- a/mbed-os.lib	Sat Aug 01 07:49:39 2020 +0000
+++ b/mbed-os.lib	Thu Feb 18 08:15:37 2021 +0000
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-os/#a2ada74770f043aff3e61e29d164a8e78274fcd4
+https://github.com/ARMmbed/mbed-os/#26606218ad9d1ee1c8781aa73774fd7ea3a7658e