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License: MIT License

C 80.36% HTML 19.64%

avr-musicbox's Introduction

avr-musicbox

avrマイコンとスピーカだけで作れる和音再生可能な電子オルゴール

参考元 https://hello-world.blog.ss-blog.jp/search/?keyword=%E9%9F%B3%E6%A5%BD%E3%82%92%E6%BC%94%E5%A5%8F%E3%81%97%E3%81%9F%E3%81%84

機能

avrとスピーカーの直結可
タクトスイッチとLED
4ch矩形波
音域: C1~B7
楽譜毎にループ機能
チャンネル毎に設定可能
- 減衰の有無
- パルス幅(1/2, 1/4)
- 音量(1bit)

対応AVR

ATTiny85(t85)
- t45も可
ATTiny202(t202)
- t402も可

ピンの機能は各main.cの先頭にメモあり

譜面作成

Music Macro Languageライクの記法で譜面作成可能

譜面作成 mml.html

フォーマット

header 2byte
  TTTTTTTT
  TTT____L
    TickPerMinute=(beat/minute=BPM)*(tick/beat=beat(♩(1/4) in most)/minNoteValue) 11bit
    loop 1bit
track
  0 1byte
  commands 1byte
    1LOONNNN
      note=NNNN+(O+(baseMode?1:4))*12;
      length=tick[L];
      play();

    01LTTTTT
      tick[L]=TTTTT;

    001_BVME
      bass=B;
      halfVol=V;
      pulseMod=M;
      envelope=!E;

    00011111~00000010 reserved

    00000001
      break;
0 0 2byte

使い方

platformio core を使用必要に応じてインストール

各ディレクトリにてpio runで書き込み

PCB

KiCADのデータがあるかも pcb-stuff

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