Td实现overflow为Hide效果

本文介绍了一个系统在各个功能模块中快速部署的方法与实践。通过优化功能模块的实现方式,提高了系统的响应速度和整体性能。

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    <td style="overflow:hidden;white-space:nowrap;">系统在各,功能ffd模块,均有快 dddddddd dddddddddddddddddddddd</td>
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内容概要:本文详细介绍了如何使用STM32微控制器精确控制步进电机,涵盖了从原理到代码实现的全过程。首先,解释了步进电机的工作原理,包括定子、转子的构造及其通过脉冲信号控制转动的方式。接着,介绍了STM32的基本原理及其通过GPIO端口输出控制信号,配合驱动器芯片放大信号以驱动电机运转的方法。文中还详细描述了硬件搭建步骤,包括所需硬件的选择与连接方法。随后提供了基础控制代码示例,演示了如何通过定义控制引脚、编写延时函数和控制电机转动函数来实现步进电机的基本控制。最后,探讨了进阶优化技术,如定时器中断控制、S形或梯形加减速曲线、微步控制及DMA传输等,以提升电机运行的平稳性和精度。 适合人群:具有嵌入式系统基础知识,特别是对STM32和步进电机有一定了解的研发人员和技术爱好者。 使用场景及目标:①学习步进电机与STM32的工作原理及二者结合的具体实现方法;②掌握硬件连接技巧,确保各组件间正确通信;③理解并实践基础控制代码,实现步进电机的基本控制;④通过进阶优化技术的应用,提高电机控制性能,实现更精细和平稳的运动控制。 阅读建议:本文不仅提供了详细的理论讲解,还附带了完整的代码示例,建议读者在学习过程中动手实践,结合实际硬件进行调试,以便更好地理解和掌握步进电机的控制原理和技术细节。同时,对于进阶优化部分,可根据自身需求选择性学习,逐步提升对复杂控制系统的理解。
代码解释: <body BGCOLOR=gray onload="jsInitialByDeviceType()"> <left> <Table border = 0 cellspacing = 0 cellpadding = 0> <tr> <td> <div id="EXAMPLE_DIV_ID"> </div> <script type="text/javascript"></script></td> </tr> <tr> <td align=center> <INPUT type = button VALUE = "保存圖片" id = 'SaveDraingImage' disabled = "disabled" ONCLICK = 'jsSaveToImageFilePath("myObject")' />   <INPUT type = button VALUE = "清除" id = 'Clear' ONCLICK = 'jsClear("myObject")' disabled = "disabled" /></td> </tr> </Table> <form> <Table class="MsoTableGrid tab2" border=1 cellspacing=0 cellpadding=0 style="display: none" > <tr> <td> Device Type: </td> <td> <textarea id = "devicename" cols = "20" rows = "1" style="font-size: 14px; overflow:hidden; background-color:#FEFF91; border:0;" readonly="readonly"></textarea> </td> <td><input type="button" VALUE = "Select Device" id = "change" name="change" onclick='jsBackToSelectDevice("myObject")'></td> <!-- <td><INPUT type = button VALUE = "Uninitial" id = 'Uninitial' ONCLICK = 'jsUnInitialDevice("myObject")' disabled = "disabled" /></td> --> <td><INPUT type = button VALUE = "About" id = 'About' ONCLICK = 'jsAboutBox("myObject")' disabled = "disabled" /></td> <td> </td> <td><INPUT type = button VALUE = "Set Background" id = 'SetBK' ONCLICK = 'jsSetBackgroundImage("myObject")' disabled = "disabled" /></td> </tr> <tr> <td> Pen Color: </td> <td> <select name="pencolor" id = 'pencolor' disabled = "disabled" onchange = 'jsSetPenColor("myObject")' > <option value = "1">Red</option> <option value = "2">Green</option> <option value = "3">Blue</option> <option value = "4">Black</option> <option value = "5">White</option> </select> </td> <td> Pen Width:</td> <td> <select name = "penwidth" id = 'penwidth' onchange = 'jsSetPenWidth("myObject")' > </select> </td> <td> Pen Style:</td> <td> <select name = "penstyle" id = 'penstyle' disabled = "disabled" onchange = 'jsSetPenStyle("myObject")'> </select> </td> </tr> <tr> <td> </td> <td> <select name = "savetype" id = 'savetype' disabled = "disabled" > <option value = "1" selected="true">JPG</option> <option value = "2">BMP</option> <option value = "3">PNG</option> <option value = "4">GIF</option> <option value = "5">TIFF</option> </select> </td> <td> <select name = "savedpi" id = 'savedpi' disabled = "disabled" > <option value = "0" >150 dpi</option> <option value = "1">300 dpi</option> </select> </td> <td><INPUT type = button VALUE = "Get Size" id = 'getsize' disabled = "disabled" ONCLICK = 'jsGetPointSize("myObject")' /></td> <td> <select id="points"> </select> </td> <td><INPUT id="pointInfo" type="button" VALUE="ShowPointInfo" ONCLICK="jsGetPointData('myObject')"/></td> </tr> <tr> <td><INPUT type = button VALUE = "Save Drawing Video" id = 'SaveDraingVideo' disabled = "disabled" ONCLICK = 'jsSaveToVideoFilePath("myObject")' /></td> <td> <select name = "saveformat" id = 'saveformat' disabled = "disabled" > <option value = "1">MP4</option> <option value = "2">WMV</option> </select> </td> <td> <select name = "savefps" id = 'savefps' disabled = "disabled" > <option value = "1">5 FPS</option> <option value = "2">10 FPS</option> <option value = "3">15 FPS</option> <option value = "4">20 FPS</option> <option value = "5">25 FPS</option> <option value = "6" selected>30 FPS</option> <option value = "7">60 FPS</option> <option value = "8">90 FPS</option> <option value = "9">120 FPS</option> <option value = "10">150 FPS</option> </select> </td> <td></td> <td></td> <td></td> </tr> <tr> <td><INPUT type = button VALUE = "ActiveTablet" id = 'enabletablet' disabled = "disabled" ONCLICK = 'jsActiveTablet("myObject", 1)' /></td> <td><INPUT type = button VALUE = "DeactiveTablet" id = 'disenabletablet' disabled = "disabled" ONCLICK = 'jsActiveTablet("myObject", 0)' /></td> <td><o:p> </o:p></td> <td><o:p> </o:p></td> <td><o:p> </o:p></td> <td><INPUT type = button VALUE = "Get Valid" id = 'getvalid' disabled = "disabled" ONCLICK = 'jsGetProtectValidStatus("myObject")' /></td> </tr> <tr> <td><INPUT type = button VALUE = "Pad ID" id = 'padid' disabled = "disabled" ONCLICK = 'jsGetPadID("myObject")' /></td> <td><INPUT type = button VALUE = "Pen ID" id = 'penid' disabled = "disabled" ONCLICK = 'jsGetPenID("myObject")' /></td> <td><INPUT type = button VALUE = "Version ID" id = 'versionid' disabled = "disabled" ONCLICK = 'jsGetVersionID("myObject")' /></td> <td><INPUT type = button VALUE = "Display Version ID" id = 'displayversionid' disabled = "disabled" ONCLICK = 'jsDisplayVersionID("myObject", 1)' /></td> <td><INPUT type = button VALUE = "Hide Version ID" id = 'hideversionid' disabled = "disabled" ONCLICK = 'jsDisplayVersionID("myObject", 0)' /></td> <td><o:p> </o:p></td> </tr> <tr> <td><INPUT type = button VALUE = "Close LED" id = 'closeled' disabled = "disabled" ONCLICK = 'jsCloseLed("myObject")' /></td> <td><INPUT type = button VALUE = "Open LED" id = 'openled' disabled = "disabled" ONCLICK = 'jsOpenLed("myObject")' /></td> <td><INPUT style="display:none" type = button VALUE = "Save Device Image" id = 'SaveDeviceImage' disabled = "disabled" ONCLICK = 'jsSaveDeviceIamge("myObject")' /></td> <td> <input type="text" id="HorMargin" name="" value="" placeholder="Width"> </td> <td> <input type="text" id="VerMargin" name="" value="" placeholder="Height"> </td> <td><INPUT type = button VALUE = "Set Clip" id="SetCenterImageClip" disabled = "disabled" ONCLICK = 'jsSetCenterImageClip("myObject")' /></td> </tr> <tr> <td><INPUT type = button VALUE = "Upload Data Into Device" id = 'SaveDeviceData' disabled = "disabled" ONCLICK = 'jsSaveDeviceData("myObject")' /></td> <td> <select name = "writefile" id = 'writefile' disabled = "disabled" > <option value = "1">1</option> <option value = "2">2</option> <option value = "3">3</option> <option value = "4">4</option> <option value = "5">5</option> </select> </td> <td><INPUT type = button VALUE = "Download Device Data" id = 'ReadDeviceData' disabled = "disabled" ONCLICK = 'jsReadDeviceData("myObject")' /></td> <td> <select name = "readfile" id = 'readfile' disabled = "disabled" > <option value = "1">1</option> <option value = "2">2</option> <option value = "3">3</option> <option value = "4">4</option> <option value = "5">5</option> </select> </td> <td><INPUT type = button VALUE = "Clear Device Data" id = 'ClearDeviceData' disabled = "disabled" ONCLICK = 'jsClearDeviceData("myObject")' /></td> <td> <select name = "deletefile" id = 'deletefileselect' disabled = "disabled" > <option value = "0">0</option> <option value = "1">1</option> <option value = "2">2</option> <option value = "3">3</option> <option value = "4">4</option> <option value = "5">5</option> </select> </td> </tr> </Table> <P> <Table border = "1" style="display: none"> <tr> <td><b>Image encoding using the Base64</b></td> </tr> <tr> <td id="encodeType"> <input type = "button" id = "encode1" value = "Bmp" disabled = "disabled" ONCLICK = 'jsPacketsBase64Encode(1)'> <input type = "button" id = "encode2" value = "Jpg" disabled = "disabled" ONCLICK = 'jsPacketsBase64Encode(2)'> <input type = "button" id = "encode3" value = "Png" disabled = "disabled" ONCLICK = 'jsPacketsBase64Encode(3)'> <input type = "button" id = "encode4" value = "Gif" disabled = "disabled" ONCLICK = 'jsPacketsBase64Encode(4)'> <input type = "button" id = "encode5" value = "Tiff" disabled = "disabled" ONCLICK = 'jsPacketsBase64Encode(5)'> <input type = "button" id = "encode6" value = "Ink" disabled = "disabled" ONCLICK = 'jsPacketsBase64Encode(6)'> </td> </tr> </table> <Table border = "1" style="display: none"> <tr> <td><textarea id = "theTextEncode" cols = "125" rows = "10"></textarea></td> </tr> <tr> <td><INPUT TYPE = button VALUE = "Base64 Decode" id = 'decode' disabled = "disabled" ONCLICK = 'jsBase64Decode("myObject")' /></td> </tr> <tr> <td><textarea id = "theTextInkData" cols = "125" rows = "10"></textarea></td> </tr> </table> <!-- <input type="hidden" runat="server" id="devicename" name="devicename"> --> </form> </center> </body>
05-25
### HTML代码功能解析 以下是针对HTML代码中的JavaScript函数和表单交互逻辑的详细分析: #### JavaScript 函数作用说明 1. **`jsInitialByDeviceType()`** 此函数的主要目的是根据设备类型初始化页面上的某些组件或样式。它可能通过检测用户的浏览器环境(如桌面端或移动端),动态调整页面布局或其他行为[^1]。 2. **`jsSaveToImageFilePath()`** 这一函数通常用于处理保存图像文件路径的操作。具体来说,它可以接收来自用户输入的数据,并将其存储到指定位置或者生成一个可下载的链接供用户操作[^2]。 3. **其他潜在辅助函数** 如果存在更多未提及的具体名称的JS方法,则需依据实际定义来判断其用途;一般情况下它们可能是为了支持主要业务流程而设计的小型工具类方法,比如验证数据有效性、更新UI状态等[^3]。 #### 表单交互逻辑详解 - **按钮功能描述** - 提交按钮 (`<button type="submit">`):触发整个表单提交事件至服务器端进行进一步处理。 当点击此按钮时会执行默认动作或将调用特定绑定好的自定义脚本完成额外任务前先阻止默认提交过程再手动发送请求给后台API接口地址[^4]。 - 取消/重置按钮(`<input type="reset"/>` 或者 `<button onclick="someFunction()">Cancel</button>` ) :前者直接清除当前填写的所有字段回到初始空白状态后者则可以跳转回上级页面或者其他预设URL链接地址[^5]. - **下拉菜单选项控制机制** 下拉列表(`<select><option value="">...</option></select>`)允许访问者从一组固定的候选项目里挑选唯一答案作为最终选定项传递给后端程序做后续计算统计等工作流环节的一部分内容之一[^6]. ```html <!-- 示例代码 --> <form id="exampleForm"> <!-- Dropdown Menu --> <label for="deviceTypes">Choose a Device Type:</label> <select name="devices" id="deviceTypes" onchange="updateFieldsBasedOnSelection(this.value)"> <option value="desktop">Desktop</option> <option value="mobile">Mobile</option> </select> <!-- Buttons --> <button type="button" onclick="customSubmitLogic()">Custom Submit</button> <button type="reset">Reset Form</button> <!-- Hidden Input Field Example --> <input type="hidden" id="imagePathField" /> </form> <script> function customSubmitLogic() { const selectedValue = document.getElementById('deviceTypes').value; jsInitialByDeviceType(selectedValue); // Initialize based on device selection. } // Simulated function calls within the script block. function updateFieldsBasedOnSelection(value){ console.log("Selected:", value); } </script> ```
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