![\"\"](\"https:\/\/okiraku-camera.tokyo\/blog\/wp-content\/uploads\/2018\/10\/aad0ee2a4c85a60cb6d179f6121abb1c.jpg\")
<\/a>LED\u306e\u3064\u3044\u305fPS\/2\u30ad\u30fc\u30dc\u30fc\u30c9\u3092\u6301\u3063\u3066\u306a\u304b\u3063\u305f\u306e\u3067\u3001amazon\u3067666\u5186\uff08\u9001\u6599\u8fbc\uff09\u3067\u58f2\u3063\u3066\u3044\u305f\u30b5\u30f3\u30ef\u30b5\u30d7\u30e9\u30a4\u306eSKB-L1BK\u3092\u8cfc\u5165\u3057\u3066\u4f7f\u3063\u305f\u3002<\/p>\n
\u4ed5\u7d44\u307f<\/h1>\n
\u307e\u305a\u3001PS\/2\u30ad\u30fc\u30dc\u30fc\u30c9\u306f+5V\u96fb\u6e90\u3092\u5fc5\u8981\u3068\u3059\u308b\u3002\u305d\u3057\u3066\u3001\u30db\u30b9\u30c8\u5074\u3068\u30ad\u30fc\u30dc\u30fc\u30c9\u306e\u63a5\u7d9a\u306b\u306f\u3001+5V\u30ec\u30d9\u30eb\u306e\uff12\u672c\u306e\u4fe1\u53f7\u7dda\u3092\u4f7f\u3046\u3002\u306a\u306e\u3067\u3001\u524d\u56de\u3068\u540c\u3058+3.3V\u52d5\u4f5c\u306ePro Micro\u3067\u306f\u30c0\u30e1\u3067\u3001+5V\u52d5\u4f5c\u306e\u3082\u306e\u304c\u5fc5\u8981\u306b\u306a\u308b\u3002 \u4eca\u56de\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u56de\u8def\u3092\u4f7f\u3063\u305f\u3002<\/p>\n PRO MINI\u306bMINI DIN\u30bd\u30b1\u30c3\u30c8\u3092\u63a5\u7d9a\u3057\u3001PC\u3068PRO MINI\u306f\u79cb\u6708\u96fb\u5b50\u306eUSB-\u30b7\u30ea\u30a2\u30eb\u5909\u63db\u30e2\u30b8\u30e5\u30fc\u30ebAE-FT231X\u3092\u4f7f\u3063\u3066\u63a5\u7d9a\u3059\u308b\u3002\u305d\u3057\u3066PS\/2\u30ad\u30fc\u30dc\u30fc\u30c9\u306e\u30b1\u30fc\u30d6\u30eb\u306f\u3001MINI-DIN\u30bd\u30b1\u30c3\u30c8\u306b\u63a5\u7d9a\u3059\u308b\u3002\uff12\u672c\u306e\u4fe1\u53f7\u7dda\u306b\u306f\u30b7\u30e7\u30fc\u30c8\u3057\u305f\u3068\u304d\u306e\u96fb\u6d41\u3092\u5236\u9650\u3059\u308b\u305f\u3081\u3001\u305d\u308c\u305d\u308c\u76f4\u5217\u306b\u62b5\u6297\u3092\u5165\u308c\u308b\u3079\u304d\u306a\u306e\u3060\u304c\u4eca\u56de\u306f\u7701\u7565\u3057\u305f\u3002 PRO MINi\u304a\u3088\u3073\u30ad\u30fc\u30dc\u30fc\u30c9\u306e\u96fb\u6e90\u306fAE-FT231X\u306e+5V\u7aef\u5b50\u3092\u4f7f\u3046\u304c\u3001\u3053\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306eUSB-VBUS\u3068+5V\u7aef\u5b50\u306e\u9593\u306b\u306f350mA\u3067\u30c8\u30ea\u30c3\u30d7\u3059\u308b\u30dd\u30ea\u30b9\u30a4\u30c3\u30c1\u304c\u5165\u3063\u3066\u3044\u308b\u304b\u3089\u3001\u904e\u5927\u306a\u96fb\u6d41\u3092\u6d88\u8cbb\u3059\u308b\u30c7\u30d0\u30a4\u30b9\u306f\u63a5\u7d9a\u3067\u304d\u306a\u3044\u3002PS\/2\u30ad\u30fc\u30dc\u30fc\u30c9\u306e\u6700\u5927\u6d88\u8cbb\u96fb\u6d41\u306e\u4ed5\u69d8\u306f100mA\u306e\u3088\u3046\u306a\u306e\u3067\u307e\u305a\u5927\u4e08\u592b\u3060\u308d\u3046\u3002<\/p>\n \u30ad\u30fc\u30dc\u30fc\u30c9\u3068PRO MINI\u9593\u3067\u63a5\u7d9a\u3059\u308b\u4fe1\u53f7\u7dda\u306fDATA\u3068CLK\u306e\uff12\u672c\u306e\u307f<\/span><\/strong>\u3067\u3001\u4eca\u56de\u306fCLK\u3092Arduino\u306eD3 (INT1)\u306b\u3001DATA\u3092D5\u306b\u3064\u306a\u3044\u3060\u3002 \u30ad\u30fc\u30dc\u30fc\u30c9 – \u30db\u30b9\u30c8\u9593\u306f\u53cc\u65b9\u5411\u306e\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u3063\u3066\u3044\u3066\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u304b\u3089\u30db\u30b9\u30c8\u306b\u306f\u304a\u3082\u306b\u30ad\u30fc\u5165\u529b\u30c7\u30fc\u30bf\u304c\u3001\u30db\u30b9\u30c8\u304b\u3089\u30ad\u30fc\u30dc\u30fc\u30c9\u306b\u306f\u30ea\u30bb\u30c3\u30c8\u3084LED\u70b9\u706f\u306a\u3069\u306e\u5236\u5fa1\u60c5\u5831\uff08\u30b3\u30de\u30f3\u30c9\uff09\u304c\u9001\u4fe1\u3055\u308c\u308b\u3002DATA\u306e\u6240\u6709\u6a29\uff08\u3069\u3061\u3089\u304c\u9001\u4fe1\u5074\u306b\u306a\u308b\u304b\uff09\u306f\u30db\u30b9\u30c8\u5074\u304c\u6c7a\u3081\u308b\u304c\u3001\u3044\u305a\u308c\u306e\u65b9\u5411\u3082\u540c\u671f\u30af\u30ed\u30c3\u30af\u306e\u767a\u751f\u306f\u30ad\u30fc\u30dc\u30fc\u30c9\u5074\u304c\u884c\u3046\u3002\u3053\u308c\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u5074\u306e\u5b9f\u88c5\u3092\u5bb9\u6613\u306b\u3059\u308b\u305f\u3081\u3060\u308d\u3046\u3002<\/p>\n \u901a\u4fe1\u306e\u30c1\u30e3\u30fc\u30c8\u3084\u30bf\u30a4\u30df\u30f3\u30b0\u306b\u3064\u3044\u3066\u306f\u3001PS\/2 Mouse\/Keyboard Protocol (This article is Copyright 1999, Adam Chapweske) <\/a>\u3092\u53c2\u8003\u306b\u3057\u3001\u4ee5\u4e0b\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u306f\u4eca\u56de\u5b9f\u88c5\u3057\u305f\u56de\u8def\u3084\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u52d5\u304b\u3057\u3066\u5b9f\u969b\u306b\u89b3\u6e2c\u3057\u305f\u3082\u306e\u3092\u63b2\u8f09\u3057\u305f\u3002<\/p>\n \uff12\u672c\u306e\u4fe1\u53f7\u7dda\u306e\u99c6\u52d5\u306f\u30aa\u30fc\u30d7\u30f3\u30b3\u30ec\u30af\u30bf\u3067\u884c\u3046\u3053\u3068\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u4fe1\u53f7\u7dda\u306f\u30db\u30b9\u30c8\u5074\u3067\u96fb\u6e90\u96fb\u5727\u306b\u30d7\u30eb\u30a2\u30c3\u30d7\u3059\u308b\uff08\u30ad\u30fc\u30dc\u30fc\u30c9\u5074\u306b\u30d7\u30eb\u30a2\u30c3\u30d7\u62b5\u6297\u304c\u5165\u3063\u3066\u3044\u308b\u306e\u304b\u3069\u3046\u304b\u306f\u4e0d\u660e\uff09\u3002\u4e21\u7aef\u3068\u3082\u306b\u99c6\u52d5\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306fHIGH\u30ec\u30d9\u30eb\u306b\u306a\u308a\u3001\u3044\u305a\u308c\u304b\u304c\u99c6\u52d5\u4e2d\u306f\u3001\u30d7\u30eb\u30a2\u30c3\u30d7\u62b5\u6297\u3092\u4ecb\u3057\u305f\u96fb\u6d41\u3092\u5438\u3044\u8fbc\u3093\u3067LOW\u30ec\u30d9\u30eb\u3068\u306a\u308b\u3002<\/p>\n \u6982\u5ff5\u56f3\u3067\u306f\u3053\u3093\u306a\u5177\u5408\u304b\u3002OUTPUT\u3092HIGH\u306b\u3057\u3066\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\u306e\u30d9\u30fc\u30b9\u306b\u96fb\u6d41\u3092\u6d41\u305b\u3070\u3001\u30d7\u30eb\u30a2\u30c3\u30d7\u62b5\u6297\u3092\u4ecb\u3057\u3066\u30b3\u30ec\u30af\u30bf\u306b\u96fb\u6d41\u304c\u6d41\u308c\u8fbc\u3080\u306e\u3067\u4fe1\u53f7\u7dda\uff08\u56f3\u3067\u306fDATA or CLK\uff09\u306fLOW\u306b\u306a\u308b\u3057\u3001OUTPUT\u3092LOW\u306b\u3059\u308c\u3070\u30b3\u30ec\u30af\u30bf\u304c\u30cf\u30a4\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u306a\u3063\u3066\u4fe1\u53f7\u7dda\u306fHIGH\u306b\u306a\u308b\u3002\u304a\u306e\u304a\u306e\u306eINPUT\u306f\u30cf\u30a4\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306a\u5165\u529b\u30dd\u30fc\u30c8\u3092\u60f3\u5b9a\u3057\u3066\u304a\u308a\u3001\u4efb\u610f\u306e\u6642\u70b9\u3067\u4fe1\u53f7\u7dda\u306e\u8ad6\u7406\u5024\u3092\u8aad\u307f\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n Arduino\u3092\u4f7f\u3046\u3068\u304d\u3001\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\u3084OC\u30c9\u30e9\u30a4\u30d0IC\u3092\u4f7f\u3063\u305f\u308a\u3001\u5404\u4fe1\u53f7\u7dda\u3054\u3068\u306b\u30dd\u30fc\u30c8\u30d4\u30f3\u3092\uff12\u672c\u4f7f\u3046\u306e\u3082\u9762\u5012\u306a\u306e\u3067\u3001\u975e\u99c6\u52d5\u4e2d\u306f\u00a0pinMode(port, INPUT);<\/em>\uff08\u30cf\u30a4\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\uff09\u306b\u3057\u3001\u99c6\u52d5\u3059\u308b\u3068\u304d\u306f\u00a0pinMode(port, OUTPUT);<\/em> \u3068\u3057\u30660\u3092\u51fa\u529b\uff08\u30b7\u30f3\u30af\uff09\u3059\u308b\u3053\u3068\u3067\u4ee3\u7528\u3057\u305f\u3002<\/p>\n \u4eca\u56de\u306f\u3001\u56de\u8def\u56f3\u306b\u793a\u3059\u3088\u3046\u306b4.7K\u03a9\u3067\u30d7\u30eb\u30a2\u30c3\u30d7\u3059\u308b\u3053\u3068\u306b\u3057\u305f\u3002+5V\u96fb\u6e90\u30674.7K\u03a9\u306a\u3089\u3070\u3001\u99c6\u52d5\u4e2d\u306b\u6d41\u308c\u8fbc\u3080\u96fb\u6d41\u306f1mA\u7a0b\u5ea6\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308b\u3002\u62b5\u6297\u5024\u3092\u5c0f\u3055\u304f\u3059\u308b\u3068\u30af\u30ed\u30c3\u30af\u3084\u30c7\u30fc\u30bf\u306e\u7acb\u3061\u4e0a\u304c\u308a\u304c\u7d20\u65e9\u304f\u306a\u308b\u304c\u3001\u96fb\u6d41\u306f\u4f59\u8a08\u306b\u6d41\u308c\u308b\u3053\u3068\u306b\u306a\u308b\u3002<\/p>\n \u901a\u5e38\u306e\u5834\u5408\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u306e\u30ad\u30fc\u3092\u6253\u3063\u305f\u3089\u5bfe\u5fdc\u3059\u308b\u30b9\u30ad\u30e3\u30f3\u30b3\u30fc\u30c9\u304c\u9001\u4fe1\u3055\u308c\u308b\u3002\u30ad\u30fc\u30dc\u30fc\u30c9\u306f\u3001\u5c11\u306a\u304f\u3068\u308250usec\u306e\u671f\u9593CLK\u304cHIGH\u306a\u3089\u3070\u9001\u4fe1\u53ef\u80fd\uff08\u30db\u30b9\u30c8\u5074\u304c\u6240\u6709\u6a29\u3092\u6301\u305f\u306a\u3044\uff09\u3068\u5224\u65ad\u3057\u3066CLK\u306e\u99c6\u52d5\u3092\u958b\u59cb\u3057\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u3002\u30ad\u30fc\u30dc\u30fc\u30c9\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5f62\u5f0f\u3067\uff11\u30d0\u30a4\u30c8\u5206\u306e\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u3066\u304f\u308b\u3002\u306a\u304a\u3001\uff11\u30d0\u30a4\u30c8\u5206\u306e\u9001\u4fe1\u304c\u7d42\u308f\u308b\u3068\u30af\u30ed\u30c3\u30af\u9001\u4fe1\u3092\u505c\u6b62\u3059\u308b\u306e\u3067CLK\u306fHIGH\u306b\u623b\u308b\u3002<\/p>\n \u30ad\u30fc\u30dc\u30fc\u30c9\u306fCLK\u304cHIGH\u306e\u671f\u9593\uff08\u7acb\u4e0a\u308a\u304b\u30895usec\u4ee5\u5185\uff09\u306b\u9001\u4fe1\u3059\u3079\u304d\u30d3\u30c3\u30c8\u3092DATA\u306b\u51fa\u529b\u3057\u3001\u6b21\u306e\u7acb\u4e0a\u308a\uff08\u304b\u30895usec\u4ee5\u5185\uff09\u307e\u3067\u4fdd\u6301\u3059\u308b<\/span>\u3053\u3068\u306b\u306a\u3063\u3066\u3044\u308b\u3002\u306a\u306e\u3067\u3001\u30db\u30b9\u30c8\u306fCLK\u306e\u7acb\u4e0b\u308a\u30a8\u30c3\u30b8\u3092\u691c\u51fa\u3057\u305f\u3068\u304d\u306bDATA\u3092\u8aad\u3081<\/span>\u3070\u30ad\u30fc\u30dc\u30fc\u30c9\u304c\u305d\u306e\u3068\u304d\u51fa\u3057\u305f\u30d3\u30c3\u30c8\u306e\u8ad6\u7406\u5024\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n \u6700\u521d\u306e\u7acb\u4e0b\u308a\u306fSTART\u30d3\u30c3\u30c8\u306a\u306e\u3067\u5e38\u306b0\u3002\u30db\u30b9\u30c8\u306f\u3001\u5f15\u304d\u7d9a\u304f8\u56de\u306e\u7acb\u4e0b\u308a\u3067\u30c7\u30fc\u30bf\u306eLSB\u304b\u3089\u9806\u306b8\u30d3\u30c3\u30c8\u5206\u3092\u8aad\u307f\u53d6\u308b\u3002\u305d\u306e\u6b21\u304c\u30d1\u30ea\u30c6\u30a3\u30d3\u30c3\u30c8\uff08\u5947\u6570\u30d1\u30ea\u30c6\u30a3\uff09\u3067\u3001\u6700\u5f8c\u306b\u5e38\u306b1\u306eSTOP\u30d3\u30c3\u30c8\u304c\u304f\u308b\u3002\u3064\u307e\u308a\u5408\u8a08\u306711\u56de\u306e\u7acb\u4e0b\u308a\u30a8\u30c3\u30b8\u3067\uff11\u30d0\u30a4\u30c8\u5206\u306e\u30c7\u30fc\u30bf\u304c\u8868\u73fe\u3055\u308c\u308b\u3002 CLK\u306e\u8ad6\u7406\u306fHIGH\u72b6\u614b\u304b\u3089\u958b\u59cb\u3059\u308b\u306e\u3067\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u304cSTART\u30d3\u30c3\u30c8\u3092\u30bb\u30c3\u30c8\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u306fCLK\u3060\u3051\u3067\u306f\u308f\u304b\u3089\u306a\u3044\u3002\u5c11\u306a\u304f\u3068\u3082CLK\u306e\u6700\u521d\u306e\u7acb\u4e0b\u308a\u30a8\u30c3\u30b8\u3067DATA\u306b\u51fa\u3066\u3044\u308b\u306e\u304cSTART\u30d3\u30c3\u30c8\u3068\u3044\u3046\u3053\u3068\u3002<\/p>\n CLK\u304cHIGH\u307e\u305f\u306fLOW\u306e\u671f\u9593\u306f\u3001\u56f3\u306b\u793a\u3057\u305f\u3088\u3046\u306b\u7d0430\uff5e50usec\u306a\u306e\u3067\u3001\u30db\u30b9\u30c8\u306f\u7acb\u4e0b\u308a\u691c\u51fa\u5f8c\u3059\u307f\u3084\u304b\u306b\u8aad\u307f\u53d6\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u4eca\u56de\u4f7f\u3063\u305f\u30ad\u30fc\u30dc\u30fc\u30c9\u3067\u306f1\u5468\u671f\u304c\u7d0480usec\u3060\u3063\u305f\u3002\u3064\u307e\u308a\u3001\u5468\u6ce2\u6570\u306f12.5KHz\u7a0b\u5ea6\u306a\u306e\u3060\u308d\u3046\u3002<\/p>\n PS\/2\u30ad\u30fc\u30dc\u30fc\u30c9\u3067\u306f\u3001\u6570\u30d0\u30a4\u30c8\u306e\u30b3\u30fc\u30c9\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u308b\u30ad\u30fc\u304c\u3042\u3063\u305f\u308a\u3001\u30d7\u30ea\u30d5\u30a3\u30c3\u30af\u30b9\u30b3\u30fc\u30c9\u306b\u3088\u3063\u3066\u30ad\u30fc\u306e\u30ea\u30ea\u30fc\u30b9\u3092\u8868\u3057\u305f\u308a\u3059\u308b\u306e\u3067\u3001\u30db\u30b9\u30c8\u5074\u306f\u9023\u7d9a\u7684\u306b\u53d7\u4fe1\u3092\u884c\u3048\u308b\u3088\u3046\u306b\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308b\u3002 \u30db\u30b9\u30c8\u306f\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u3092\u30ea\u30bb\u30c3\u30c8\u3059\u308b\u3068\u304d\u3084\u3001LED\u306e\u70b9\u706f\uff0f\u6d88\u706f\u3092\u884c\u3046\u3068\u304d\u30ad\u30fc\u30dc\u30fc\u30c9\u306b\u5bfe\u3057\u3066\u30b3\u30de\u30f3\u30c9\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u3002\u30ad\u30fc\u30dc\u30fc\u30c9\u304c\u30b3\u30de\u30f3\u30c9\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308b\u3068\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u306f\u901f\u3084\u304b\u306b\u5fdc\u7b54\u30c7\u30fc\u30bf\uff08ACK\u307e\u305f\u306f\u518d\u9001\u8981\u6c42\uff09\u3092\u8fd4\u3057\u3066\u304f\u308b\u3002<\/p>\n \u30b3\u30de\u30f3\u30c9\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u3068\u304d\u306b\u306f\u3001\u307e\u305aDATA\u306e\u6240\u6709\u6a29\u3092\u5f97\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u305d\u306e\u305f\u3081\u306b\u30db\u30b9\u30c8\u306f\u3001CLK\u3092\u6700\u5c0f\u3067100usec\u306e\u671f\u9593LOW\u306b\u4fdd\u3061\u3001\u305d\u306e\u72b6\u614b\u306e\u307e\u307eDATA\u3092LOW\u306b\u3059\u308b\u3053\u3068\u3067\u30ad\u30fc\u30dc\u30fc\u30c9\u306b\u5bfe\u3057\u3066\u9001\u4fe1\u8981\u6c42<\/strong>\u3092\u884c\u3046\u3002\u305d\u3057\u3066DATA\u3092LOW\u306b\u99c6\u52d5\u3057\u3066\u304b\u3089\u7d0450usec\u5f8c\u306bCLK\u306e\u99c6\u52d5\u3092\u505c\u6b62\u3059\u308b\u3002\u5177\u4f53\u7684\u306b\u306f\u3001Arduino\u306e\u30dd\u30fc\u30c8\u30d4\u30f3\u3092INPUT\u306b\u8a2d\u5b9a\u3057\u76f4\u3059\u3053\u3068\u3067\u3001\u30cf\u30a4\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306b\u623b\u3059\u3002<\/p>\n \u9001\u4fe1\u8981\u6c42\u304c\u6210\u529f\u3059\u308b\u3068\u30ad\u30fc\u30dc\u30fc\u30c9\u304cCLK\u306e\u99c6\u52d5\u3092\u958b\u59cb\u3059\u308b\u3002\u30ad\u30fc\u30dc\u30fc\u30c9\u306fCLK\u304cHIGH\u306e\u671f\u9593\u306bDATA\u3092\u8aad\u307f\u53d6\u308b<\/span>\u3002\u306a\u306e\u3067\u3001CLK\u306e\u99c6\u52d5\u3092\u958b\u59cb\u3059\u308b\u524d\uff08CLK\u304cHIGH\u306e\u671f\u9593\uff09\u306bSTART\u30d3\u30c3\u30c8\u3092\u8aad\u307f\u53d6\u308b\u3068\u601d\u308f\u308c\u308b\uff08\u9001\u4fe1\u8981\u6c42\u306e\u305f\u3081DATA\u306fLOW\u306e\u307e\u307e\uff09\u3002\u30db\u30b9\u30c8\u306f\u5f15\u304d\u7d9a\u304f\u7acb\u4e0b\u308a\u30a8\u30c3\u30b8\u3067bit0\u3092\u51fa\u529b\u3057\u3066\u3084\u308a\u3001\u305d\u306e\u5f8c\u3082\u7acb\u4e0b\u308a\u30a8\u30c3\u30b8\u3054\u3068\u306b\u9806\u6b21DATA\u306b\u30d3\u30c3\u30c8\u3092\u4e57\u305b\u3066\u3084\u308b\u3002 \u4eca\u56de\u5b9f\u88c5\u3057\u3066\u3044\u3066\u3001\u9001\u4fe1\u8981\u6c42\u3092\u884c\u3046\u305f\u3081\u306bDATA\u3092LOW\u306b\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u65e9\u304f\u3057\u305f\u308a\u9045\u304f\u3057\u305f\u308a\u3059\u308b\u3068\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u304cCLK\u306e\u99c6\u52d5\u3092\u958b\u59cb\u3057\u306a\u3044\u3053\u3068\u304c\u3042\u3063\u305f\u3002\u3051\u3063\u3053\u3046\u5fae\u5999\u306a\u3068\u3053\u308d\u3002 \u4e0a\u8a18\u306e\u56de\u8def\u306b\u30ad\u30fc\u30dc\u30fc\u30c9\u3092\u3064\u306a\u3044\u3067\u4ee5\u4e0b\u306e\u30b9\u30b1\u30c3\u30c1\u3092\u66f8\u304d\u8fbc\u3093\u3067\u52d5\u304b\u3059\u3068\u3001\u6b21\u306e\u3088\u3046\u306b\u52d5\u4f5c\u3059\u308b\u3002<\/p>\n \u6700\u7d42\u7684\u306b\u306f\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u5f62\u614b\u306b\u3059\u308b\u304c\u3001\u4eca\u56de\u306f\u52d5\u4f5c\u78ba\u8a8d\u304c\u76ee\u7684\u3068\u3044\u3046\u3053\u3068\u3067\u30b9\u30b1\u30c3\u30c1\u306b\u30d9\u30bf\u30c3\u3068\u66f8\u3044\u305f\u3002\u307e\u305f\u3001\u62bc\u4e0b\u3057\u305f\u30ad\u30fc\u306b\u5bfe\u5fdc\u3057\u305f\u6587\u5b57\u3092\u51fa\u3059\u3053\u3068\u304c\u76ee\u7684\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u30b9\u30ad\u30e3\u30f3\u30b3\u30fc\u30c9\u5217\u304b\u3089\u6587\u5b57\u3092\u5f97\u308b\u3088\u3046\u306a\u6a5f\u80fd\u306f\u5165\u3063\u3066\u3044\u306a\u3044\u3002<\/p>\n JIS\u914d\u5217PS\/2\u30ad\u30fc\u30dc\u30fc\u30c9\u306e\u30b9\u30ad\u30e3\u30f3\u30b3\u30fc\u30c9\u306b\u3064\u3044\u3066\u306f\u3001 http:\/\/www.ne.jp\/asahi\/shared\/o-family\/ElecRoom\/AVRMCOM\/PS2_RS232C\/KeyCordList.pdf<\/a> \u3092\u53c2\u8003\u306b\u3055\u305b\u3066\u3044\u305f\u3060\u3044\u305f\u3002<\/p>\n \u4eca\u56de\u306e\u30b9\u30b1\u30c3\u30c1\u3067\u306f\u3001CLK\u306e\u7acb\u4e0b\u308a\u30a8\u30c3\u30b8\u306b\u3088\u308b\u5272\u8fbc\u307f\u51e6\u7406\u5185\u3067\u30c7\u30fc\u30bf\u306e\u53d7\u4fe1\u3068\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u3092\u884c\u3063\u3066\u304a\u308a\u3001\u5272\u8fbc\u307f\u767a\u751f\u6642\u306b\u4f55\u3092\u3059\u308b\u304b\u306f\u3001\u72b6\u614b\u3092\u793a\u3059 bus_state<\/em> \u3068\u3044\u3046\u5909\u6570\u3068\u3001\u691c\u51fa\u3057\u305f\u7acb\u4e0b\u308a\u30a8\u30c3\u30b8\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b clocks<\/em> \u3068\u3044\u3046\u5909\u6570\u3067\u6c7a\u307e\u308b\u3088\u3046\u306b\u3057\u305f\u3002<\/p>\n \u30db\u30b9\u30c8\u304cDATA\u306e\u6240\u6709\u6a29\u3092\u6301\u3063\u3066\u304a\u3089\u305a\u3001\u30c7\u30fc\u30bf\u306e\u53d7\u4fe1\u5f85\u3061\u3092\u8868\u3059\u3002\u3053\u306e\u72b6\u614b\u3067\u5272\u8fbc\u307f\u304c\u8d77\u304d\u308c\u3070\u3001\u305d\u308c\u306f\u30ad\u30fc\u30dc\u30fc\u30c9\u304cCLK\u306e\u99c6\u52d5\u3092\u958b\u59cb\u3057\u305f\u3053\u3068\u306b\u306a\u308b\u3002<\/p>\n \uff08clocks++<\/em>\u306e\u5f8c\u306b\uff09clocks\u00a0<\/em>\u304c1\uff5e8\u306a\u3089\u3070\u3001\u30c7\u30fc\u30bf\u30d3\u30c3\u30c8\u306e\u53d7\u4fe1\u4e2d\u306a\u306e\u3067\u5909\u6570 data<\/em> \u306bLSB\u304b\u3089\u9806\u306b\u53d6\u308a\u8fbc\u3093\u3067\u3044\u304f\u30028\u30d3\u30c3\u30c8\u76ee\u3092\u53d6\u308a\u8fbc\u3081\u305f\u3089\u3001\u30d1\u30ea\u30c6\u30a3\u30d3\u30c3\u30c8\u3084STOP\u30d3\u30c3\u30c8\u306f\u7121\u8996\u3057\u3066\u3001\u53d7\u4fe1\u30d0\u30c3\u30d5\u30a1\u306b\u683c\u7d0d\u3059\u308b\uff08 put_buffer(data);<\/em> \uff09\u3002\u30d1\u30ea\u30c6\u30a3\u30a8\u30e9\u30fc\u304f\u3089\u3044\u306f\u898b\u3066\u3082\u3044\u3044\u306e\u3060\u304c\u3002 send_command();<\/em> \u3067\u30db\u30b9\u30c8\u304b\u3089\u306e\u9001\u4fe1\u3092\u958b\u59cb\u3059\u308b\u305f\u3081\u306bCLK\u3092LOW\u306b\u3057\u305f\u6642\u70b9\u3067\u5272\u8fbc\u307f\u304c\u8d77\u304d\u308b\u3002clocks<\/em>\u306e\u521d\u671f\u5316\u3084\u9001\u4fe1\u3059\u3079\u304d\u30c7\u30fc\u30bf\u306e\u8a2d\u5b9a\u306a\u3069\u3092\u884c\u3046\u3002 \uff08clocks++<\/em>\u306e\u5f8c\u306b\uff09clocks<\/em>\u304c1\uff5e8\u306a\u3089\u3070\u3001\u30c7\u30fc\u30bf\u30d3\u30c3\u30c8\u306e\u9001\u4fe1\u4e2d\u306a\u306e\u3067\u5909\u6570 data<\/em>\u306e\u5185\u5bb9\u3092LSB\u304b\u3089\u9806\u306b1\u30d3\u30c3\u30c8\u305a\u3064DATA\u306b\u4e57\u305b\u308b\u3002clocks == 9\u00a0<\/em>\u306a\u3089\u30d1\u30ea\u30c6\u30a3\u30d3\u30c3\u30c8\u300110\u306a\u3089STOP\u30d3\u30c3\u30c8\u3092\u9001\u308b\u3002STOP\u30d3\u30c3\u30c8\u306f\u5e38\u306b1\u306a\u306e\u3067\u3001\u3053\u306e\u6642\u70b9\u3067DATA\u306e\u6240\u6709\u6a29\u3092\u653e\u68c4\uff08 pinMode(PS2_DATA, INPUT);<\/em> \uff09\u3057\u3066\u3044\u308b\u3002 \u3053\u306e\u95a2\u6570\u306f\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u3078\u306e\u30b3\u30de\u30f3\u30c9\u306e\u9001\u4fe1\u3068\u9001\u4fe1\u5f8c\u306b\u5f97\u3089\u308c\u308b\u5fdc\u7b54\u306e\u53d6\u5f97\u3092\u884c\u3046\u3002\u5fdc\u7b54\u306f\u901a\u5e381\u30d0\u30a4\u30c8\u306a\u306e\u3060\u304c\u30ea\u30bb\u30c3\u30c8\uff080xff\uff09\u3092\u9001\u3063\u305f\u3068\u304d\u3001\u6b63\u5e38\u5fdc\u7b54\uff080xfa\uff09\u306b\u5f15\u304d\u7d9a\u3044\u3066\u30ad\u30fc\u30dc\u30fc\u30c9\u5185\u3067\u306e\u30bb\u30eb\u30d5\u30c6\u30b9\u30c8\u306e\u5b9f\u884c\u7d50\u679c\u304c\u5e30\u3063\u3066\u304f\u308b\u306e\u3067\u305d\u308c\u3092\u5f97\u308b\u3088\u3046\u306b\u3057\u305f\u3002<\/p>\n \u6700\u521d\u306b\u30ad\u30fc\u30dc\u30fc\u30c9\u304b\u3089\u53d7\u4fe1\u4e2d\u304b\u3069\u3046\u304b\u3092\u00a0bus_state\u00a0<\/em>\u3092\u898b\u3066\u5224\u65ad\u3057\u3001Idle\u306a\u3089\u3070\u00a0cmd_to_send\u306b\u9001\u4fe1\u30c7\u30fc\u30bf\u3092\u30bb\u30c3\u30c8\u3057\u3001bus_state = WaitForStart<\/em>\u3068\u3057\u3066\u304b\u3089CLK\u3084DATA\u306e\u99c6\u52d5\u3092\u884c\u3046\u3002CLK\u3092LOW\u306b\u99c6\u52d5\u3057\u305f\u77ac\u9593\u306b\u5272\u8fbc\u307f\u304c\u304b\u304b\u3063\u3066clk_interrupt()<\/em> \u306b\u5236\u5fa1\u304c\u79fb\u308b\u3053\u3068\u306b\u6ce8\u610f\u3002 \u30b9\u30b1\u30c3\u30c1\u5185\u3067\u3001\u9001\u4fe1\u3057\u305f\u30b3\u30de\u30f3\u30c9\u3068\u5fdc\u7b54\u30c7\u30fc\u30bf\u3092\u30b7\u30ea\u30a2\u30eb\u30e2\u30cb\u30bf\u306b\u8868\u793a\u3057\u3066\u7d42\u4e86\u3002<\/p>\n \u4e00\u822c\u7684\u306aPS\/2\u30ad\u30fc\u30dc\u30fc\u30c9\u306b\u306f3\u3064\u306eLED\u304c\u3042\u308a\u3001\u5404LED\u3092\u8868\u3059\u30d3\u30c3\u30c8\u3092\u30bb\u30c3\u30c8\uff0f\u30ea\u30bb\u30c3\u30c8\u3059\u308b\u3053\u3068\u3067\u70b9\u706f\u307e\u305f\u306f\u6d88\u706f\u3059\u308b\u3002<\/p>\n LED\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306b\u306f\u307e\u305a0xed\u3092\u9001\u308b\u3002\u3053\u306e\u30b3\u30de\u30f3\u30c9\u30d0\u30a4\u30c8\u306b\u5bfe\u3057\u3066\u6b63\u5e38\u5fdc\u7b54\u304c\u5f97\u3089\u308c\u305f\u3089\u3001LED\u72b6\u614b\u3092\u8868\u3059\u30d1\u30e9\u30e1\u30fc\u30bf\u30d0\u30a4\u30c8\u3092\u540c\u3058\u3088\u3046\u306b\u9001\u4fe1\u3059\u308b\u3002\u5404LED\u3092\u8868\u3059\u30d3\u30c3\u30c8\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u3002<\/p>\n \u3064\u307e\u308a\u3001LSB\u304cScrLock LED\u3001bit1\u304cNumLock LED\u3001bit2\u304cCapsLock LED\u3068\u3044\u3046\u3053\u3068\u3002\u5bfe\u5fdc\u3059\u308b\u30d3\u30c3\u30c8\u304c\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u308c\u3070\u70b9\u706f\u3057\u3001\u30af\u30ea\u30a2\u3055\u308c\u3066\u3044\u308c\u3070\u6d88\u706f\u3059\u308b\u3002\u30b3\u30de\u30f3\u30c9\u3092\u9001\u4fe1\u3059\u308b\u305f\u3081\u306e bool kbd_led(uint8_t led) ;<\/em> \u3068\u3001\u5404LED\u72b6\u614b\u3092\u30c8\u30b0\u30eb\u3059\u308b\u305f\u3081\u306e\u00a0void toggle_led(uint8_t led);<\/em> \u3092\u7528\u610f\u3057\u305f\u3002<\/p>\n \u30ad\u30fc\u30dc\u30fc\u30c9\u3092\u30d1\u30ef\u30fc\u30aa\u30f3\u30ea\u30bb\u30c3\u30c8\u3057\u305f\u72b6\u614b\u306b\u623b\u3059\u3002\u5185\u90e8\u3067BAT ( BASIC Assurance Test\u3068\u3044\u3046\u3089\u3057\u3044\uff09\u304c\u8d70\u308a\u3001\u305d\u306e\u7d50\u679c\u3092\u5e30\u3063\u3066\u304f\u308b\u3002\u30ea\u30bb\u30c3\u30c8\u3059\u308b\u3068\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u306b\u3042\u308b\uff13\u3064\u306eLED\u304c\u540c\u6642\u306b\u70b9\u706f\u3057\u3066\u3059\u3050\u6d88\u3048\u308b\u3002<\/p>\n \u30ea\u30bb\u30c3\u30c8\u3092\u884c\u3046\u305f\u3081\u306e\u95a2\u6570 kbd_reset()<\/em> \u3092\u7528\u610f\u3057\u3001setup()<\/em> \u306e\u6700\u5f8c\u306b\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u3002PRO MINI\u306e\u30ea\u30bb\u30c3\u30c8\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u3084\u308b\u3068\u3001\u30b7\u30ea\u30a2\u30eb\u30e2\u30cb\u30bf\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n \u30b3\u30de\u30f3\u30c9\u306b\u5bfe\u3059\u308b\u5fdc\u7b54\uff08FA)\u3068\u3001BAT\u6b63\u5e38\u7d42\u4e86\u3092\u8868\u3059 AA \u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n PS\/2\u30ad\u30fc\u30dc\u30fc\u30c9\u306e\u30b9\u30ad\u30e3\u30f3\u30b3\u30fc\u30c9\u306f\u3001HID\u30ad\u30fc\u30dc\u30fc\u30c9\u3068\u9055\u3063\u3066\u8907\u96d1\u602a\u5947\u3067\u3042\u308b\u3002\u4eca\u56de\u306f\u3075\u3064\u3046\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u30b9\u30ad\u30e3\u30f3\u30b3\u30fc\u30c9\u3092\u5bfe\u8c61\u306b\u3057\u305f\u304c\u3001\u3069\u3046\u3084\u3089\u6570\u7a2e\u985e\u306e\u30b9\u30ad\u30e3\u30f3\u30b3\u30fc\u30c9\u306e\u30b0\u30eb\u30fc\u30d7\u304c\u3042\u308b\u3089\u3057\u3044\u3002<\/p>\n \u4eca\u56de\u306f\u3001\u30ad\u30fc\u30dc\u30fc\u30c9\u304b\u3089\u9001\u3089\u308c\u3066\u304d\u305f\u30b9\u30ad\u30e3\u30f3\u30b3\u30fc\u30c9\u3092\u30b7\u30ea\u30a2\u30eb\u30e2\u30cb\u30bf\u306b\u8868\u793a\u3059\u308b\u3060\u3051\u306b\u3057\u3001\u7279\u5b9a\u306e\u30ad\u30fc\u306e\u62bc\u4e0b\u306b\u5bfe\u5fdc\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u52d5\u304f\u3088\u3046\u306b\u3057\u305f\u3002<\/p>\n \u4e00\u5fdc\u30010xe0\u30840xf0\u3068\u3044\u3063\u305f\u30d7\u30ea\u30d5\u30a3\u30c3\u30af\u30b9\u30b3\u30fc\u30c9\u3092\u610f\u8b58\u3057\u305f\u51e6\u7406\u306b\u3057\u305f\u304c\u3001\u307e\u3060\u4e0d\u5b8c\u5168\u3060\u308d\u3046\uff080xe0\u306e\u65b9\u306f\u4e0d\u8981\u306a\u6c17\u3082\u3059\u308b\uff09\u3002\u305f\u3068\u3048\u3070\u3001Pause\u30ad\u30fc\u306e\u30b9\u30ad\u30e3\u30f3\u30b3\u30fc\u30c9\u306b\u306fNumLock\u30ad\u30fc\u3068\u540c\u30580x77\u304c\u542b\u307e\u308c\u308b\u306e\u3067\u3001NumLock\u30ad\u30fc\u3092\u62bc\u3057\u305f\u3068\u304d\u3068\u540c\u3058\u3088\u3046\u306b\u52d5\u4f5c\u3057\u3066\u3057\u307e\u3046\u3002<\/p>\n \u5b9f\u969b\u306b\u52d5\u304b\u3059\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n
\n\u3068\u308a\u3042\u3048\u305a\u624b\u5143\u306b+5V\u7248\u306ePro Micro\u304c\u306a\u3044\u3057\u3001\u6ce8\u6587\u3057\u3066\u5c4a\u304f\u307e\u3067\uff12\u9031\u9593\u7a0b\u5ea6\u306f\u304b\u304b\u308a\u305d\u3046\u306a\u306e\u3067\u3001\u624b\u6301\u3061\u306eArduino PRO MINI (\u30b3\u30d4\u30fc\u54c1\u306eThe Simple\uff09\u306b\u63a5\u7d9a\u3057\u3066\u3044\u308d\u3044\u308d\u3084\u3063\u3066\u307f\u308b\u3053\u3068\u306b\u3057\u305f\u3002<\/p>\n<\/a>\u56de\u8def\u56f3<\/h2>\n
<\/a>
\nMINI-DIN\u30bd\u30b1\u30c3\u30c8\u306b\u3064\u3044\u3066\u3082\u3001\u79cb\u6708\u96fb\u5b50\u306eMINI-DIN DIP\u5316\u30ad\u30c3\u30c8\uff08\u30df\u30cb\uff24\uff29\uff2e\u30b3\u30cd\u30af\u30bf\u30d4\u30c3\u30c1\u5909\u63db\u30ad\u30c3\u30c8<\/a>\uff09\u3092\u4f7f\u3063\u305f\u306e\u3067\u3001\u30d6\u30ec\u30c3\u30c9\u30dc\u30fc\u30c9\u306b\u305d\u306e\u307e\u307e\u8f09\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u305f\u3002<\/p>\n<\/a>\u30ad\u30fc\u30dc\u30fc\u30c9\u3068\u30db\u30b9\u30c8\u9593\u306e\u901a\u4fe1<\/h2>\n
\nCLK\u306b\u306f\u30c7\u30fc\u30bf\u4f1d\u9001\u6642\u306e\u307f10K\uff5e16.7KHz\u306e\u30af\u30ed\u30c3\u30af\u4fe1\u53f7\u304c\u3001DATA\u306b\u306fCLK\u306b\u540c\u671f\u3057\u305f\u30b7\u30ea\u30a2\u30eb\u30c7\u30fc\u30bf\uff081\u30b9\u30bf\u30fc\u30c8\u30d3\u30c3\u30c8\u30018\u30d3\u30c3\u30c8\u30c7\u30fc\u30bf\u3001\u5947\u6570\u30d1\u30ea\u30c6\u30a3\u30011\u30b9\u30c8\u30c3\u30d7\u30d3\u30c3\u30c8<\/span>\uff09\u304c\u6d41\u308c\u308b\u3002\u30c7\u30fc\u30bf\u306fLSB\u304b\u3089MSB\u306e\u9806\u3002\u4ee5\u4e0b\u901a\u4fe1\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3059\u308b\u5074\uff08\u4eca\u56de\u306fPRO MINI\u3001\u4e00\u822c\u7684\u306b\u306fPC\uff09\u3092\u300c\u30db\u30b9\u30c8\u300d\u3068\u79f0\u3059\u308b\u3053\u3068\u306b\u3059\u308b\u3002<\/p>\n\u96fb\u6c17\u7684\u306a\u6982\u7565<\/h5>\n
<\/a>\u30ad\u30fc\u30dc\u30fc\u30c9\u304b\u3089\u30db\u30b9\u30c8\u3078\u306e\u901a\u4fe1<\/h5>\n
<\/a>
\n\u5947\u6570\u30d1\u30ea\u30c6\u30a3\u306a\u306e\u30678\u30d3\u30c3\u30c8\u306e\u30c7\u30fc\u30bf\u306e\u3046\u3061\u30011\u306e\u30d3\u30c3\u30c8\u304c\u5076\u6570\u500b\u306a\u3089\u30d1\u30ea\u30c6\u30a3\u30d3\u30c3\u30c8\u306f1\u3001\u5947\u6570\u500b\u306a\u30890\u3068\u306a\u308b\u3002\u30c7\u30fc\u30bf\u306e8\u30d3\u30c3\u30c8\u3068\u30d1\u30ea\u30c6\u30a3\u30d3\u30c3\u30c8\u3092\u3042\u308f\u305b\u3066\u5947\u6570\u500b\u306e\u30d3\u30c3\u30c8\u304c1\u306b\u306a\u308b\u3002<\/p>\n<\/a>
\n\u4eca\u56de\u4f7f\u3063\u305f\u30ad\u30fc\u30dc\u30fc\u30c9\u3067\u5b9f\u6e2c\u3057\u305f\u3068\u3053\u308d\u3001\u8907\u6570\u30d0\u30a4\u30c8\u306e\u30b9\u30ad\u30e3\u30f3\u30b3\u30fc\u30c9\u3092\u767a\u751f\u3059\u308b\u30ad\u30fc\u306e\u5834\u5408\u3001\u6700\u521d\u306e\u30d0\u30a4\u30c8\u306eSTOP\u30d3\u30c3\u30c8\u306e\u5f8c\u3001\u7d043.2msec\u5f8c\u306b\u6b21\u306e\u30d0\u30a4\u30c8\u306e\u305f\u3081\u306eCLK\u306e\u99c6\u52d5\u304c\u958b\u59cb\u3057\u3066\u3044\u305f\u3002\u305f\u3060\u3001\u30db\u30b9\u30c8\u304b\u3089\u30b3\u30de\u30f3\u30c9\u3092\u9001\u3063\u305f\u5834\u5408\u306b\u306f400usec\u7a0b\u5ea6\u3067\u5fdc\u7b54\u304c\u5e30\u3063\u3066\u304f\u308b\u3002<\/p>\n\u30db\u30b9\u30c8\u304b\u3089\u30ad\u30fc\u30dc\u30fc\u30c9\u3078\u306e\u901a\u4fe1<\/h5>\n
<\/a>
\n\u56f3\u306b\u306f\u300c\u7acb\u4e0a\u308a\u30a8\u30c3\u30b8\u3067\u8aad\u307f\u53d6\u308b\u300d\u3068\u66f8\u3044\u305f\u304c\u3001\u7acb\u4e0a\u308a\u30a8\u30c3\u30b8\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u307e\u3067\u306b\u30db\u30b9\u30c8\u306fDATA\u306b\u30d3\u30c3\u30c8\u3092\u51fa\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308b\u3001\u3068\u3044\u3046\u610f\u5473\u3002<\/p>\n
\n\u4ee5\u4e0b\u306e\u30b9\u30b1\u30c3\u30c1\u306e send_command();<\/em> \u3068\u3044\u3046\u95a2\u6570\u306b\u9001\u4fe1\u8981\u6c42\u306e\u305f\u3081\u306e\u30dd\u30fc\u30c8\u5236\u5fa1\u3092\u66f8\u3044\u3066\u3042\u308b\u304c\u3001\u3053\u306e\u3042\u305f\u308a\u306f\u3082\u3046\u3061\u3087\u3063\u3068\u691c\u8a3c\u3057\u305f\u3044\u90e8\u5206\u3067\u3042\u308b\u3002<\/p>\n\u30b9\u30b1\u30c3\u30c1<\/h1>\n
\n
#define LED 13 \/\/ on-board led.\r\n#define PS2_DATA 5\r\n#define PS2_CLK 3\r\n#define CLK_INT 1\r\n\r\nvoid show_error(int ms) {\r\n digitalWrite(LED, 1);\r\n delay(ms);\r\n digitalWrite(LED, 0);\r\n delay(ms);\r\n}\r\n\r\nstatic const uint8_t KBD_BUFFER_SIZE = 12;\r\nvolatile uint8_t kbd_in, kbd_out;\r\nuint8_t kbd_buffer[KBD_BUFFER_SIZE]; \/\/ fifo key buffer \r\n\r\nvoid clear_buffer() {\r\n cli();\r\n kbd_in = kbd_out = 0;\r\n sei(); \r\n}\r\n\r\nbool put_buffer(uint8_t s) {\r\n uint8_t rx = kbd_in + 1;\r\n if (rx >= KBD_BUFFER_SIZE) rx = 0;\r\n if (rx == kbd_out) return false; \/\/ buffer is full. \r\n kbd_buffer[kbd_in] = s;\r\n kbd_in = rx; \r\n return true; \r\n}\r\n\r\nuint8_t get_buffer() {\r\n if (kbd_in == kbd_out) return 0; \/\/ empty.\r\n uint8_t s = kbd_buffer[kbd_out];\r\n cli();\r\n if (++kbd_out >= KBD_BUFFER_SIZE) kbd_out = 0;\r\n sei(); \r\n return s; \r\n}\r\n\r\nuint8_t cmd_to_send;\r\n\r\ntypedef enum { None = 0, Idle, Receiving, WaitForStart, Sending } bus_state_t;\r\nvolatile bus_state_t bus_state;\r\n\r\nvoid clk_interrupt() {\r\n volatile static uint8_t data = 0;\r\n volatile static uint8_t clocks = 0;\r\n volatile static uint8_t par = 0;\r\n switch(bus_state) {\r\n case Idle:\r\n clocks = 0;\r\n data = 0;\r\n digitalWrite(LED, 1);\r\n bus_state = Receiving; \/\/ found Start bit \r\n break;\r\n case Receiving:\r\n clocks++;\r\n if (clocks < 9) {\r\n data = data >> 1 | (digitalRead(PS2_DATA) ? 0x80 : 0);\r\n if (clocks == 8) \/\/ \u30d1\u30ea\u30c6\u30a3\u3068\u30b9\u30c8\u30c3\u30d7\u30d3\u30c3\u30c8\u306f\u7121\u8996\u3002\r\n put_buffer(data); \/\/ \u3068\u308a\u3042\u3048\u305a\u30d0\u30c3\u30d5\u30a1\u30d5\u30eb\u306f\u898b\u306a\u3044\u3002\r\n } else if (clocks == 10) { \/\/ STOP bit.\r\n bus_state = Idle;\r\n digitalWrite(LED, 0);\r\n }\r\n break;\r\n case WaitForStart: \/\/ Start bit will be fetched. (DATA is LOW)\r\n par = 0;\r\n clocks = 0;\r\n data = cmd_to_send;\r\n bus_state = Sending;\r\n break; \r\n case Sending:\r\n clocks++;\r\n if (clocks == 9) \/\/ parity\r\n digitalWrite(PS2_DATA, par & 1 ? LOW : HIGH);\r\n else if (clocks == 10) \/\/ STOP bit timing.\r\n pinMode(PS2_DATA, INPUT); \/\/ release DATA\r\n else if (clocks == 11) \/\/ ACK bit from keyboard.\r\n bus_state = Idle; \r\n else if (clocks > 0 && clocks < 9) { \/\/ send data bits.\r\n if (data & 1) {\r\n digitalWrite(PS2_DATA, HIGH);\r\n par++;\r\n } else \r\n digitalWrite(PS2_DATA, LOW);\r\n data = data >> 1;\r\n } \r\n break;\r\n } \r\n}\r\n\r\nbool send_command(uint8_t cmd, uint8_t resp_count = 1, uint8_t* resp = 0) {\r\n int timeout = 15; \r\n unsigned long start = millis();\r\n while(bus_state != Idle && millis() - start < timeout) \r\n delayMicroseconds(200);\r\n clear_buffer(); \r\n cmd_to_send = cmd;\r\n bus_state = WaitForStart;\r\n pinMode(PS2_CLK, OUTPUT); \/\/ \r\n digitalWrite(PS2_CLK, 0); \/\/ drive LOW.\r\n delayMicroseconds(100); \/\/ at least 100usec.\r\n pinMode(PS2_DATA, OUTPUT); \/\/ drive LOW (START bit)\r\n digitalWrite(PS2_DATA ,0);\r\n delayMicroseconds(50);\r\n pinMode(PS2_CLK, INPUT); \/\/ release clock. CLK goes to HIGH.\r\n \r\n start = millis();\r\n while(bus_state != Idle && millis() - start < timeout) \r\n delayMicroseconds(100);\r\n\r\n uint8_t ret = 0;\r\n for(int8_t i = 0; i < resp_count; i++) {\r\n char tmp[20];\r\n start = millis();\r\n if (cmd == 0xff && i == 1)\r\n timeout = 500; \/\/ for Basic Assuarance Test.\r\n while((ret = get_buffer()) == 0 && millis() - start < timeout) \/\/ \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u30c1\u30a7\u30c3\u30af\u3059\u308b\r\n ;\r\n if (resp)\r\n resp[i] = ret; \r\n sprintf(tmp, \"cmd=%02X, resp=%02X\", cmd, ret);\r\n Serial.println(tmp);\r\n }\r\n return (ret == 0xfa);\r\n}\r\n\r\nbool kbd_reset() {\r\n uint8_t tmp[2];\r\n send_command(0xff, 2, tmp); \/\/ reset keyboard. \r\n if (tmp[0] == 0xfa && tmp[1] == 0xaa)\r\n return true;\r\n return false; \r\n}\r\n\r\n#define PS2_LED_CAPSLOCK 4\r\n#define PS2_LED_NUMLOCK 2\r\n#define PS2_LED_SCRLOCK 1\r\n\r\nuint8_t kbd_led_state = 0;\r\nbool kbd_led(uint8_t led) {\r\n bool f = send_command(0xed); \/\/ LED\r\n if (f) {\r\n kbd_led_state = led;\r\n send_command(led); \/\/ LED parameter.\r\n } else\r\n kbd_reset();\r\n return f;\r\n}\r\n\r\nvoid toggle_led(uint8_t led) {\r\n uint8_t new_led = kbd_led_state;\r\n if (new_led & led) new_led &= ~led;\r\n else new_led |= led;\r\n kbd_led(new_led); \r\n}\r\n\r\nconst uint8_t pattern[] = {0, 2, 4, 1, 0, 1, 4, 2, 0, 2, 6, 7, 5, 1, 0, 7};\r\nvoid led_demo() {\r\n kbd_reset();\r\n delay(50);\r\n for(int j = 0; j < 5; j++) {\r\n for(uint8_t i = 0; i < sizeof(pattern); i++) {\r\n kbd_led(pattern[i] & 7);\r\n delay(200);\r\n }\r\n }\r\n kbd_led(0);\r\n}\r\n\r\nvoid setup() {\r\n Serial.begin(115200);\r\n delay(100); \r\n Serial.println(\"A_PROMINI_PS2_LED1 Start.\");\r\n pinMode(LED, OUTPUT);\r\n digitalWrite(LED, 0);\r\n pinMode(PS2_DATA, INPUT);\r\n pinMode(PS2_CLK, INPUT);\r\n attachInterrupt(CLK_INT, clk_interrupt, FALLING);\r\n delay(50);\r\n if (!kbd_reset())\r\n show_error(300);\r\n}\r\n\r\nvoid loop() {\r\n uint8_t scan_code = get_buffer();\r\n static bool e0_prefix = false;\r\n static bool f0_prefix = false;\r\n if (scan_code) {\r\n char tmp[20];\r\n sprintf(tmp, \"%02X \", scan_code);\r\n Serial.println(tmp);\r\n if (scan_code == 0xf0)\r\n f0_prefix = true;\r\n else if (scan_code == 0xe0)\r\n e0_prefix = true; \r\n else if (!f0_prefix && !e0_prefix) { \/\/ LED.\r\n if (scan_code == 0x09) \/\/ F10\r\n toggle_led(PS2_LED_NUMLOCK);\r\n else if (scan_code == 0x78) \/\/ F11\r\n toggle_led(PS2_LED_CAPSLOCK);\r\n else if (scan_code == 0x07) \/\/ F12\r\n toggle_led(PS2_LED_SCRLOCK);\r\n else if (scan_code == 0x77) \/\/ Num Lock\r\n led_demo();\r\n }\r\n if (scan_code != 0xe0 && scan_code != 0xf0) {\r\n if (e0_prefix) e0_prefix = false; \r\n if (f0_prefix) f0_prefix = false; \r\n } \r\n }\r\n}<\/pre>\nvoid\u00a0clk_interrupt() \u306b\u3064\u3044\u3066<\/h2>\n
Idle\u72b6\u614b<\/h5>\n
Receiving\u72b6\u614b<\/h5>\n
\n\u305d\u3057\u3066clocks<\/em>\u304c10\u306a\u3089\u3070\u3001\u305d\u308c\u306fSTOP\u30d3\u30c3\u30c8\u3092\u8868\u3057\u3066\u3044\u308b\u3002\u53d7\u4fe1\u5b8c\u4e86\u3057\u305f\u3082\u306e\u3068\u3057\u3066\u3001Idle\u72b6\u614b\u306b\u623b\u308b\u3002<\/p>\nWaitForStart\u72b6\u614b<\/h5>\n
\n\u3053\u306e\u6642\u70b9\u3067\u306f\u30ad\u30fc\u30dc\u30fc\u30c9\u306b\u3088\u308bCLK\u306e\u99c6\u52d5\u306f\u958b\u59cb\u3057\u3066\u3044\u306a\u3044\u3002\u99c6\u52d5\u304c\u958b\u59cb\u3057\u306a\u3044\u5834\u5408\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u306f\u884c\u308f\u308c\u306a\u3044\u3002\u4eca\u56de\u306e\u30b9\u30b1\u30c3\u30c1\u3067\u306f\u3001\u304b\u306a\u3089\u305a\u99c6\u52d5\u306f\u958b\u59cb\u3059\u308b\u3082\u306e\u3068\u3057\u305f\u3002<\/p>\nSending\u72b6\u614b<\/h5>\n
\nclocks == 11\u00a0<\/em>\u306a\u3089\u3070\u30ad\u30fc\u30dc\u30fc\u30c9\u5074\u304cDATA\u306b\u4e57\u305b\u308bACK\u30d3\u30c3\u30c8\u3092\u8aad\u3080\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u4eca\u56de\u306e\u5b9f\u88c5\u3067\u306fDATA\u306e\u8aad\u307f\u53d6\u308a\u306f\u884c\u308f\u305a\u9001\u4fe1\u304c\u7d42\u4e86\u3057\u305f\u3082\u306e\u3068\u3057\u3066\u72b6\u614b\u3092Idle\u306b\u623b\u3057\u3066\u3044\u308b\u3002<\/p>\n\u30b3\u30de\u30f3\u30c9\u9001\u4fe1\u306e\u305f\u3081\u306e send_command();<\/h2>\n
\n\u305d\u306e\u5f8c\u306f\u5272\u8fbc\u307f\u95a2\u6570\u304c data<\/em>\u00a0\uff08\u30b3\u30de\u30f3\u30c9\u307e\u305f\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\uff09\u3092\u9001\u4fe1\u3057\u7d42\u308f\u308b\u306e\u3092 bus_state\u00a0<\/em>\u3092\u898b\u306a\u304c\u3089\u5f85\u3061\u3001\u9001\u4fe1\u7d42\u4e86\u3057\u305f\u3089\u30ad\u30fc\u30dc\u30fc\u30c9\u304b\u3089\u306e\u5fdc\u7b54\u30c7\u30fc\u30bf\uff08\u6b63\u5e38\u53d7\u4fe1 : 0xfa\u3001\u518d\u9001\u8981\u6c42 : 0xfe\uff09\u3092\u5f85\u3064\u3002\u3053\u306e\u30b9\u30b1\u30c3\u30c1\u3067\u306f\u6b63\u5e38\u5fdc\u7b54\u4ee5\u5916\u898b\u3066\u3044\u306a\u3044\u3002
\n\u306a\u304a\u3001\u30b3\u30de\u30f3\u30c9\u9001\u4fe1\u306e\u7d42\u4e86\u304b\u3089\u5fdc\u7b54\u30c7\u30fc\u30bf\u306e\u305f\u3081\u306eCLK\u99c6\u52d5\u958b\u59cb\u307e\u3067\u306f\u7d04400usec\u3060\u3063\u305f\u3002\u305f\u3060\u3001\u30bb\u30eb\u30d5\u30c6\u30b9\u30c8\u306e\u5fdc\u7b54\u3092\u5f97\u308b\u307e\u3067\u306f\u3001400msec\u7a0b\u5ea6\u304b\u304b\u3063\u305f\u306e\u3067\u3001\u4e00\u90e8\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u6642\u9593\u3092\u5ef6\u9577\u3057\u3066\u3044\u308b\u3002<\/p>\nLED\u30b3\u30de\u30f3\u30c9(0xed)<\/h5>\n
#define PS2_LED_CAPSLOCK 4\r\n#define PS2_LED_NUMLOCK 2\r\n#define PS2_LED_SCRLOCK 1<\/pre>\n
\u30ea\u30bb\u30c3\u30c8\u30b3\u30de\u30f3\u30c9 (0xff)<\/h5>\n
<\/a>\u30e1\u30a4\u30f3\u30eb\u30fc\u30d7 ( loop() )<\/h2>\n
\n