Technical Articles
2025-01-16

Essential Hardware for Raspberry Pi Development

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  var Device = {};
  function detect(ua) {
    var MQQBrowser = ua.match(/MQQBrowser\/(\\d+\\.\\d+)/i);
    var MQQClient = ua.match(/QQ\/(\\d+\\.(\\d+)\\.(\\d+)\\.(\\d+))/i) || ua.match(/V1_AND_SQ_([\\d.]+)/);
    var WeChat = ua.match(/MicroMessenger\/((\\d+)\\.(\\d+))\\.(\\d+)/) || ua.match(/MicroMessenger\/((\\d+)\\.(\\d+))/);
    var MacOS = ua.match(/Mac\\sOS\\sX\\s(\\d+[\\.|_]\\d+)/);
    var WinOS = ua.match(/Windows(\\s+\\w+)?\\s+?(\\d+\\.\\d+)/);
    var Linux = ua.match(/Linux\\s/);
    var MiuiBrowser = ua.match(/MiuiBrowser\/(\\d+\\.\\d+)/i);
    var M1 = ua.match(/MI-ONE/);
    var MIPAD = ua.match(/MI PAD/);
    var UC = ua.match(/UCBrowser\/(\\d+\\.\\d+(\\d+\\.\\d+)?)/) || ua.match(/\\sUC\\s/);
    var IEMobile = ua.match(/IEMobile(\//|(\\s+))(\\d+\\.\\d+)/) || ua.match(/WPDesktop/);
    var ipod = ua.match(/(ipod).*\\s([\\d_]+)/i);
    var ipad = ua.match(/(ipad).*\\s([\\d_]+)/i);
    var iphone = ua.match(/(iphone)\\sos\\s([\\d_]+)/i);
    var Chrome = ua.match(/Chrome\/(\\d+\\.\\d+)/);
    var AndriodBrowser = ua.match(/Mozilla.*Linux.*Android.*AppleWebKit.*Mobile Safari/);
    var android = ua.match(/(android)\\s([\\d.]+)/i);
    var harmony = ua.match(/(OpenHarmony)\\s([\\d.]+)/i);
    Device.browser = Device.browser || {}, Device.os = Device.os || {};
    if (window.ActiveXObject) {
      var vie = 6;
      (window.XMLHttpRequest || ua.indexOf('MSIE 7.0') > -1) && (vie = 7);
      (window.XDomainRequest || ua.indexOf('Trident/4.0') > -1) && (vie = 8);
      ua.indexOf('Trident/5.0') > -1 && (vie = 9);
      ua.indexOf('Trident/6.0') > -1 && (vie = 10);
      Device.browser.ie = true, Device.browser.version = vie;
    } else if (ua.indexOf('Trident/7.0') > -1) {
      Device.browser.ie = true, Device.browser.version = 11;
    }
    if (android) {
      Device.os.android = true;
      Device.os.version = android[2];
    }
    if (harmony) {
      Device.os.harmony = true;
      Device.os.version = harmony[2];
    }
    if (ipod) {
      Device.os.ios = Device.os.ipod = true;
      Device.os.version = ipod[2].replace(/_/g, '.');
    }
    if (ipad) {
      Device.os.ios = Device.os.ipad = true;
      Device.os.version = ipad[2].replace(/_/g, '.');
    }
    if (iphone) {
      Device.os.iphone = Device.os.ios = true;
      Device.os.version = iphone[2].replace(/_/g, '.');
    }
    if (WinOS) Device.os.windows = true, Device.os.version = WinOS[2];
    if (MacOS) Device.os.Mac = true, Device.os.version = MacOS[1];
    if (Linux) Device.os.Linux = true;
    if (ua.indexOf('lepad_hls') > 0) Device.os.LePad = true;
    if (MIPAD) Device.os.MIPAD = true;
    if (MQQBrowser) Device.browser.MQQ = true, Device.browser.version = MQQBrowser[1];
    if (MQQClient) Device.browser.MQQClient = true, Device.browser.version = MQQClient[1];
    if (WeChat) Device.browser.WeChat = true, Device.browser.mmversion = Device.browser.version = WeChat[1];
    if (MiuiBrowser) Device.browser.MIUI = true, Device.browser.version = MiuiBrowser[1];
    if (UC) Device.browser.UC = true, Device.browser.version = UC[1] || NaN;
    if (IEMobile) Device.browser.IEMobile = true, Device.browser.version = IEMobile[2];
    if (AndriodBrowser) {
      Device.browser.AndriodBrowser = true;
    }
    if (M1) {
      Device.browser.M1 = true;
    }
    if (Chrome) {
      Device.browser.Chrome = true, Device.browser.version = Chrome[1];
    }
    if (Device.os.windows) {
      if (typeof navigator.platform !== "undefined" && navigator.platform.toLowerCase() == "win64") {
        Device.os.win64 = true;
      } else {
        Device.os.win64 = false;
      }
    }
    if (Device.os.Mac || Device.os.windows || Device.os.Linux) {
      Device.os.pc = true;
    }
    var osType = {
      iPad7: 'iPad; CPU OS 7',
      LePad: 'lepad_hls',
      XiaoMi: 'MI-ONE',
      SonyDTV: "SonyDTV",
      SamSung: 'SAMSUNG',
      HTC: 'HTC',
      VIVO: 'vivo'
    };
    for (var os in osType) {
      Device.os[os] = ua.indexOf(osType[os]) !== -1;
    }
    Device.os.phone = Device.os.phone || /windows phone/i.test(ua);
    Device.os.getNumVersion = function () {
      return parseFloat(Device.os.version);
    };
    Device.os.hasTouch = 'ontouchstart' in window;
    if (Device.os.hasTouch && Device.os.ios && Device.os.getNumVersion() < 6) {
      Device.os.hasTouch = false;
    }
    if (Device.browser.WeChat && Device.browser.version < 5.0) {
      Device.os.hasTouch = false;
    }
    Device.browser.getNumVersion = function () {
      return parseFloat(Device.browser.version);
    };
    Device.browser.isFFCanOcx = function () {
      return !!Device.browser.firefox && Device.browser.getNumVersion() >= 3.0;
    };
    Device.browser.isCanOcx = function () {
      return !!Device.os.windows && (!!Device.browser.ie || Device.browser.isFFCanOcx() || !!Device.browser.webkit);
    };
    Device.browser.isNotIESupport = function () {
      return !!Device.os.windows && (!!Device.browser.webkit || Device.browser.isFFCanOcx());
    };
    Device.userAgent = {};
    Device.userAgent.browserVersion = Device.browser.version;
    Device.userAgent.osVersion = Device.os.version;
    Device.os.unifiedPC = ua.match(/UnifiedPC/);
    delete Device.userAgent.version;
  }
  detect(window.navigator.userAgent);
  function canSupportH5Video() {
    var ua = window.navigator.userAgent,
      m = null;
    if (!!Device.os.android) {
      if (Device.browser.MQQ && Device.browser.getNumVersion() >= 4.2) {
        return true;
      }
      if (ua.indexOf('MI2') != -1) {
        return true;
      }
      if (Device.os.version >= '4' && (m = ua.match(/MicroMessenger\/((\\d+)\\.(\\d+))\\.(\\d+)/))) {
        if (parseFloat(m[1]) >= 4.2) {
          return true;
        }
      }
      if (Device.os.version >= '4.1') {
        return true;
      }
    }
    return false;
  }
  function canSupportVideoMp4() {
    var video = document.createElement('video');
    if (typeof video.canPlayType === 'function') {
      if (video.canPlayType('video/mp4; codecs="mp4v.20.8"') === 'probably') {
        return true;
      }
      if (video.canPlayType('video/mp4; codecs="avc1.42E01E"') === 'probably' || video.canPlayType('video/mp4; codecs="avc1.42E01E, mp4a.40.2"') === 'probably') {
        return true;
      }
    }
    return false;
  }
  function canSupportAutoPlay() {
    if (Device.os.ios && Device.os.getNumVersion() < 10) {
      return false;
    }
    return true;
  }
  function isLockdownMode() {
    if (!Device.os.ios || Device.os.getNumVersion() < 16) {
      return false;
    }
    if (typeof WebAssembly === 'undefined' && typeof OfflineAudioContext === 'undefined' && typeof WebGLRenderingContext === 'undefined') {
      return true;
    }
    return false;
  }
  Device.canSupportVideo = canSupportVideoMp4 || canSupportH5Video;
  Device.canSupportVideoMp4 = canSupportVideoMp4;
  Device.canSupportH5Video = canSupportH5Video;
  Device.canSupportAutoPlay = canSupportAutoPlay;
  Device.isLockdownMode = isLockdownMode;
  Device.cpVersion = function (version) {
    var cp = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
    var canEqual = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
    var nowVersionStr = Device.os.version;
    if (!nowVersionStr) return false;
    var versionArr = version.split('.');
    var nowVersionArr = nowVersionStr.split('.');
    for (var i = 0; i < Math.max(nowVersionArr.length, versionArr.length); i++) {
      var vi = +versionArr[i];
      var nvi = +nowVersionArr[i];
      if (vi === nvi) continue;
      if (cp > 0) return vi > nvi;
      if (cp < 0) return vi < nvi;
    }
    return canEqual || cp === 0;
  };

  function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
  function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0; i < len; i++) arr2[i] = arr[i]; return arr2; }
  var ua = navigator.userAgent;
  var is_ios = /(iPhone|iPad|iPod|iOS)/i.test(ua);
  var is_wp = /Windows\sPhone/i.test(ua);
  var is_android = /(Android)/i.test(ua);
  var is_wechat = /MicroMessenger\/([\\d.]+)/i.test(ua);
  var is_mac = /mac\sos/i.test(ua) && !is_ios;
  var is_windows = /windows\snt/i.test(ua) && !is_wp;
  var is_mpapp = /MPAPP\/([\\d.]+)/i.test(ua);
  var is_ipad = /iPad/i.test(ua);
  var is_windows_wechat = /WindowsWechat/i.test(ua);
  var is_mac_wechat = /MacWechat/i.test(ua) || /wechat.*mac os/i.test(ua);
  var is_prefetch = is_wechat && window.WeixinPrefecherJSBridge;
  var is_donut_app = /SAAASDK/i.test(ua);
  var is_open_harmony = /OpenHarmony/i.test(ua);
  var is_in_miniProgram = is_android && /miniprogram/.test(ua.toLowerCase()) || window.__wxjs_environment == 'miniprogram';
  var is_wx_work = /wxwork/i.test(ua);
  function getUrlParams() {
    var vars = location.search.substring(1).split('&');
    var params = {};
    var _iterator = _createForOfIteratorHelper(vars),
      _step;
    try {
      for (_iterator.s(); !(_step = _iterator.n()).done;) {
        var ele = _step.value;
        var pair = ele.split('=');
        var key = decodeURIComponent(pair[0]);
        if (typeof params[key] === 'undefined') {
          params[key] = decodeURIComponent(pair[1]);
        }
      }
    } catch (err) {
      _iterator.e(err);
    } finally {
      _iterator.f();
    }
    return params;
  }
  function get() {
    var reg = /MicroMessenger\/([\\d.]+)/i;
    var ret = ua.match(reg);
    if (ret && ret[1]) {
      return ret[1];
    }
    return false;
  }
  function getMac() {
    var reg = /MacWechat\/([\\d.]+)/i;
    var ret = ua.match(reg);
    if (ret && ret[1]) {
      return ret[1];
    }
    return false;
  }
  function getMacOS() {
    var reg = /Mac OS X ([\\d_]+)/i;
    var ret = ua.match(reg);
    if (ret && ret[1]) {
      return ret[1].replace(/_/g, '.');
    }
    return false;
  }
  function getWindows() {
    var reg = /WindowsWechat\(0x(.+?)\)/i;
    var ret = ua.match(reg);
    if (ret && ret[1]) {
      return ret[1];
    }
    return false;
  }
  function getWxWork() {
    var reg = /wxwork\/([\\d.]+)/i;
    var ret = ua.match(reg);
    if (ret && ret[1]) {
      return ret[1];
    }
    return false;
  }
  function getMpApp() {
    var appVersion = [2, 4, 5];
    var match = navigator.userAgent.match(/MPAPP\/([\\d+(\\\\\\d+)*/);
    if (match) {
      appVersion = match[1].split('.').map(function (v) {
        return Number(v);
      });
    }
    return appVersion.join('.');
  }
  function getUnifiedPcVer() {
    var versionInfo = navigator.userAgent.match(/UnifiedPC\w+Wechat\(0xf\w{2}(.+?)\w{2}\)/);
    if (versionInfo && versionInfo.length === 2) {
      var version = versionInfo[1];
      var mainVersion = getVersionNumber(version.slice(0, 1));
      var subVersion = getVersionNumber(version.slice(1, 2));
      var subVersion2 = getVersionNumber(version.slice(2, 3));
      return [mainVersion, subVersion, subVersion2].join('.');
    }
  }
  function getVersionNumber(hexStr) {
    return Number(Number("0x".concat(hexStr)).toString(10));
  }
  function getWindowsVersionFormat() {
    var versionInfo = navigator.userAgent.match(/WindowsWechat\(0x(.+?)\)/);
    if (versionInfo && versionInfo.length === 2) {
      var version = versionInfo[1];
      var mainVersion = getVersionNumber(version.slice(1, 2));
      var subVersion = getVersionNumber(version.slice(2, 4));
      var subVersion2 = getVersionNumber(version.slice(4, 6));
      return [mainVersion, subVersion, subVersion2].join('.');
    }
    return false;
  }
  function getInner() {
    var reg = /MicroMessenger\/([\\d.]+\(0x(.+?)\)/i;
    var ret = ua.match(reg);
    if (ret && ret[1] && ret[1] != null) {
      return ret[1];
    }
    if (!ret && /MicroMessenger\/([\\d.]+)/i.test(ua)) {
      var urlParams = getUrlParams();
      if (urlParams.version) {
        return urlParams.version;
      }
    }
    return false;
  }
  var opfunc = {
    'cp-1': function cp1(a, b) {
      return a < b;
    },
    cp0: function cp0(a, b) {
      return a === b;
    },
    cp1: function cp1(a, b) {
      return a > b;
    }
  };
  function cpVersion(ver, op, canEq, type) {
    var mmver = false;
    switch (type) {
      case 'mac':
        mmver = getMac();
        break;
      case 'windows':
        mmver = getWindowsVersionFormat();
        break;
      case 'wxwork':
        mmver = getWxWork();
        break;
      case 'mpapp':
        mmver = getMpApp();
        break;
      case 'unifiedpc':
        mmver = getUnifiedPcVer();
        break;
      default:
        mmver = get();
        break;
    }
    if (!mmver) {
      return;
    }
    var mmversion = mmver.split('.');
    var version = ver.split('.');
    if (!/\d+/g.test(mmversion[mmversion.length - 1])) {
      mmversion.pop();
    }
    for (var i = 0, len = Math.max(mmversion.length, version.length); i < len; ++i) {
      var mmv = mmversion[i] || '';
      var v = version[i] || '';
      var mmvn = parseInt(mmv, 10) || 0;
      var vn = parseInt(v, 10) || 0;
      var eq = opfunc.cp0(mmvn, vn);
      if (eq) {
        continue;
      }
      var cp = opfunc["cp".concat(op)];
      return cp(mmvn, vn);
    }
    return canEq || op === 0;
  }
  function eqVersion(version) {
    return cpVersion(version, 0);
  }
  function gtVersion(version, canEq) {
    return cpVersion(version, 1, canEq);
  }
  function ltVersion(version, canEq) {
    return cpVersion(version, -1, canEq);
  }
  function getPlatform() {
    if (is_ios) {
      return 'ios';
    }
    if (is_android) {
      return 'android';
    }
    if (is_mac) {
      return 'mac_os';
    }
    if (is_windows) {
      return 'windows';
    }
    return 'unknown';
  }
  var is_google_play = false;
  var inner_ver_for_google_play_check = getInner();
  if (is_android && inner_ver_for_google_play_check) {
    var v = "0x".concat(inner_ver_for_google_play_check.substr(-2));
    if (parseInt(v) >= 64 && parseInt(v) <= 79) {
      is_google_play = true;
    }
  }
  ({
    get: get,
    getMac: getMac,
    getMacOS: getMacOS,
    getWindows: getWindows,
    getInner: getInner,
    getWxWork: getWxWork,
    getMpApp: getMpApp,
    cpVersion: cpVersion,
    eqVersion: eqVersion,
    gtVersion: gtVersion,
    ltVersion: ltVersion,
    getPlatform: getPlatform,
    getVersionNumber: getVersionNumber,
    isWp: is_wp,
    isIOS: is_ios,
    isAndroid: is_android,
    isOHOS: is_open_harmony,
    isHarmonyNextWechat: is_open_harmony && is_wechat && cpVersion('3.0.0', 1, true),
    isInMiniProgram: is_in_miniProgram,
    isWechat: is_wechat,
    isMac: is_mac,
    isWindows: is_windows,
    isMacWechat: is_mac_wechat,
    isWindowsWechat: is_windows_wechat,
    isWxWork: is_wx_work,
    isOnlyWechat: is_wechat && !is_wx_work,
    isMpapp: is_mpapp,
    isNewMpApp: is_mpapp && cpVersion('3.0.0', 1, true, 'mpapp'),
    isIPad: is_ipad,
    isGooglePlay: is_google_play,
    isPrefetch: is_prefetch,
    isDonutAPP: is_donut_app
  });

  Device.os.ipad && Device.os.getNumVersion() >= 13 && Device.os.getNumVersion() < 14;
  function getScaleByDom() {
    var fontDom = document.createElement('div');
    fontDom.style.fontSize = '16px';
    document.body.appendChild(fontDom);
    var originFontSize = parseFloat(fontDom.style.fontSize);
    var realFontSize = parseFloat(window.getComputedStyle(fontDom, null).getPropertyValue('font-size'));
    document.body.removeChild(fontDom);
    var percent = realFontSize / originFontSize;
    return percent;
  }

  var ltReplaceChar = "lt".concat(Date.now(), "-").concat(Math.random());
  var gtReplaceChar = "gt".concat(Date.now(), "-").concat(Math.random());
  var ltReplaceCharReg = new RegExp(ltReplaceChar, 'g');
  var gtReplaceCharReg = new RegExp(gtReplaceChar, 'g');
  function isAudioPage(itemShowType) {
    return itemShowType * 1 === 7;
  }
  function replaceTagChar(str, enableTagReg) {
    var strAfterReplace;
    while (true) {
      str = str.replace(enableTagReg, function (match, sub1, sub2, sub3) {
        return "".concat(ltReplaceChar).concat(sub1).concat(gtReplaceChar).concat(sub2).concat(ltReplaceChar).concat(sub3).concat(gtReplaceChar);
      });
      if (str !== strAfterReplace) {
        strAfterReplace = str;
        continue;
      }
      break;
    }
    return strAfterReplace;
  }
  var __setDesc = function __setDesc(desc, isNoEncode, itemShowType) {
    var extData = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
    function getAttr(s, a) {
      var m = s.match(new RegExp(a + '\s*=\s*[\

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