BLE switch interface using micro:bit with 3 tact switches or 3 Makey Makey sensors

Dependencies:   microbit

Revision:
1:9d0e2e5b5d25
Child:
2:8e2e6c6658be
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+//=================================
+// microbit_switch_if_3sw
+//=================================
+//  BLE switch interface using micro:bit with 3 tact switches
+//                                       or   3 Makey Makey sensors
+//    It is intended for use with ios devices.
+//
+//    The MIT License (MIT)   Copyright (c) 2019 Masatomo Kojima
+//
+//  Please refer to the following documents. (Japanese only)
+//     http://mahoro-ba.net/files/workshop_text_switch_if_701.pdf
+//     http://mahoro-ba.net/files/workshop_text_switch_if_208.pdf
+//
+//  I refer to information written on the following sites.
+//    (1)https://os.mbed.com/teams/microbit/code/microbit_presenter/
+//           Licensed under the Apache License, Version 2.0
+//
+//    (2)https://lancaster-university.github.io/microbit-docs/
+//          The MIT License (MIT)
+//          Copyright (c) 2016 British Broadcasting Corporation.
+//
+
+Version
+3SW-180917  初版リリース
+3SW-180922  軽微な修正
+3SW-181125  "makey makey" style touch sensor に対応
+            ボタンA:RIGHT_ARROW ボタンB:LEFT_ARROW に変更
+3SW-190114  P1とP2のコード設定をSの値で、P0のコード設定をTの値でするように変更
+       P15は、P2と同じ動作
+3SW-190215  ボタンA:'A' ボタンB:'B' に変更
+       P16は、P1と同じ動作
+3SW-190313  設定Tを廃止し、設定Sで3つのスイッチの組み合わせを指定するように変更
+       S=3 をスイッチコントロール用に他で使わないコードを割り当てる
+3SW-190316  S=3のキー割り当てを変更
+3SW-190607  キーバッファ方式に変更            
+