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<!DOCTYPE html>
<html class="theme-next pisces use-motion" lang="">
<head>
<meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
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var NexT = window.NexT || {};
var CONFIG = {
root: '/',
scheme: 'Pisces',
version: '5.1.4',
sidebar: {"position":"left","display":"post","offset":12,"b2t":false,"scrollpercent":false,"onmobile":false},
fancybox: true,
tabs: true,
motion: {"enable":true,"async":false,"transition":{"post_block":"fadeIn","post_header":"slideDownIn","post_body":"slideDownIn","coll_header":"slideLeftIn","sidebar":"slideUpIn"}},
duoshuo: {
userId: '0',
author: 'Author'
},
algolia: {
applicationID: '',
apiKey: '',
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hits: {"per_page":10},
labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
}
};
</script>
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page-home">
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<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2020/01/20/开始认真学微信小程序/" itemprop="url">开始认真学微信小程序</a></h1>
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2020-01-20
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<p>2020.1.20<br>开始认真学微信小程序啦<br>回想以前的学习，总是粗浅不得深入，现在想真正掌握一些技能了</p>
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<h1 class="post-title" itemprop="name headline">
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2019-11-14
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<html>
<head><meta name="generator" content="Hexo 3.9.0">
<meta charset="utf-8">
<title>Vue 测试实例 - 菜鸟教程(runoob.com)</title>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<div id="app">
<p></p>
</div>
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new Vue({
el: '#app',
data: {
message: 'Hello Vue.js!'
}
})
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<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
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</span>
<header class="post-header">
<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2019/11/13/JavaScript-1/" itemprop="url">JavaScript 1</a></h1>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
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<span class="post-meta-item-text">Posted on</span>
<time title="Post created" itemprop="dateCreated datePublished" datetime="2019-11-13T20:57:38+08:00">
2019-11-13
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<h1 id="JavaScript-DOM操作"><a href="#JavaScript-DOM操作" class="headerlink" title="JavaScript DOM操作"></a>JavaScript DOM操作</h1><blockquote>
<p>在我的理解中，这似乎是动态改变页面文件的一种方式</p>
</blockquote>
<html>
<head><meta name="generator" content="Hexo 3.9.0">
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<script>
function displayDate(){
document.getElementById("demo").innerHTML=Date();
}
</script>
</head>
<body>
<h1>我的第一个 JavaScript 程序</h1>
<p id="demo">这是一个段落</p>
<p><button type="button" onclick="displayDate()">显示日期</button></p>
</body>
<blockquote>
<p>还可以检测鼠标操作，例如悬浮</p>
</blockquote>
<body>
<div onmouseover="mOver(this)" onmouseout="mOut(this)" style="background-color:#ffffff;width:120px;height:20px;padding:40px;color:#000000">Mouse Over Me</div>
<script>
function mOver(obj){
obj.innerHTML="Thank You"
}
function mOut(obj){
obj.innerHTML="Mouse Over Me"
}
</script>
</body>
</html>
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<link itemprop="mainEntityOfPage" href="http://yoursite.com/2019/11/06/《记梦》/">
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<meta itemprop="name" content="澄">
<meta itemprop="description" content="">
<meta itemprop="image" content="/images/avatar.gif">
</span>
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<meta itemprop="name" content="Hexo">
</span>
<header class="post-header">
<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2019/11/06/《记梦》/" itemprop="url">《记梦》</a></h1>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">Posted on</span>
<time title="Post created" itemprop="dateCreated datePublished" datetime="2019-11-06T00:54:26+08:00">
2019-11-06
</time>
</span>
</div>
</header>
<div class="post-body" itemprop="articleBody">
<blockquote>
<p>我在听歌时偶然看到了这几句</p>
</blockquote>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">楼道角落里阳光每天盛开</span><br><span class="line">你很久前也在</span><br><span class="line">很久前的花肥肥地开在窗外</span><br><span class="line">你很久前也毛茸茸地在窗里开</span><br><span class="line">它们为什么能长盛不衰</span><br><span class="line">我们为什么屡战屡败</span><br><span class="line"> ————冯唐《记梦》</span><br></pre></td></tr></table></figure>
<p>生为冰川,就该淡淡得爱海流、爱风,</p>
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<article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
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<link itemprop="mainEntityOfPage" href="http://yoursite.com/2019/11/06/IIC通讯协议/">
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="澄">
<meta itemprop="description" content="">
<meta itemprop="image" content="/images/avatar.gif">
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</span>
<header class="post-header">
<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2019/11/06/IIC通讯协议/" itemprop="url">IIC通讯协议</a></h1>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">Posted on</span>
<time title="Post created" itemprop="dateCreated datePublished" datetime="2019-11-06T00:48:46+08:00">
2019-11-06
</time>
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</header>
<div class="post-body" itemprop="articleBody">
<p>从csdn上copy的，原文<a href="https://blog.csdn.net/qq_41094339/article/details/80159838" target="_blank" rel="noopener">https://blog.csdn.net/qq_41094339/article/details/80159838</a></p>
<blockquote>
<p>一、基本概念</p>
</blockquote>
<pre><code>1、发送器：向总线发送数据的器件。
接收器：从总线接收数据的器件。
主机 ：初始化发送，产生时钟周期，结束发送的器件
从机 ：被主机寻址的器件
2、释放总线：将总线SDA线拉高</code></pre><blockquote>
<p>二、以从MPU-6050获得数据为例的IIC通讯过程</p>
</blockquote>
<pre><code>1、主机启动IIC（发送起始信号）：SCL线为高电平时，SDA出现下降沿。
2、主机发送从机地址（最后一位为0表示写信号）到总线：
（1）在SCL线为高电平时，设置SDA线的高低，以此表示数据（高电平为1，低电平为0） （一次发送八位数据/八个时钟周期）
（2）在第九个时钟周期，主机释放总线，从机将SDA线拉低，表示成功接收数据 （ACK）
3、用（1）、（2）的方法依次发送寄存器地址、寄存器配置数据
4、主机发送停止信号：SCL为高电平是，SDA出现上升沿。
5、主机启动IIC（发送起始信号）：SCL线为高电平时，SDA出现下降沿。
6、主机发送从机地址（最后一位为0表示写信号）到总线。
7、主机发送寄存器地址。
8、主机启动IIC（发送起始信号）：SCL线为高电平时，SDA出现下降沿。
9、主机发送从机地址（最后一位为1表示读信号）到总线。（之后从机开始从寄存器发送数据）
10、主机接收数据
（1）在SCL线为高电平时，读取SDA线的高低，存入一个八位变量（高电平为1，低电平为0；一次接收八个数据位/八个时钟周期；先高数据位，再低数位；
（2）在第九个时钟周期，主机告诉从机停止通信及（不要再接收数据）：保持SDA线高电平。（NACK） //如果还要主机还要接收数据，就让SDA线保持低电平（ACK）
11、主机发送停止信号：SCL为高电平是，SDA出现上升沿。</code></pre><p>注意：</p>
<pre><code>1、不管是主机还是从机发送数据都是从高位开始发。
2、ACK和NACK的问题：
（1）ACK表示应答，NACK表示不应答
（2）在主机向从机发送数据时，每发送/接收一个数据，接收器发送一个ACK表示成功接收
在从机向主机发送数据时，每发送/接收一个数据，由主机决定是否还要继续发送，如果要则ACK（应答），如果不要则NACK（不应答）.</code></pre><blockquote>
<p>补充：寄存器地址在mpu-6050官方文档里找到</p>
</blockquote>
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