<div class="document"> <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">1、项目功能介绍</h3> <hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><span style="color:#95a5a6;font-size:14px;">       USB电流计，可以实时显示USB输出的电、电压、功率大小，电压最小显示1mV，电流最小显示1mA，功耗最小显示1mW。理论最大输入电压30V，最大输入电流16A。当电流为0，15秒后进入休眠状态，电流不为0时，立即退出休眠模式。</span></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">2、项目属性</h3> <hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><span style="color:#95a5a6;font-size:14px;">此次项目为立创电子设计大赛的开源项目。</span></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">3、开源协议</h3> <hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong class="ql-size-13">GPL 3.0</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">4、设计原理</h3> <hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（1）复位按键</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>       </strong>SW1为按键，R1为上拉电阻，C1为滤波电容。复位按键在实际中几乎没有使用，可以选择删除，下载程序时，可以在keil中直接勾选reset的选项。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/Tv4jeHoCQ5fgABAeT9Ql8PO6uFm3jbtWTs0N5UiS.png" alt="Tv4jeHoCQ5fgABAeT9Ql8PO6uFm3jbtWTs0N5UiS.png" width="351" height="207"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><strong>（2）BOOT</strong></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><strong>       </strong></strong>预留BOOT接口，正常使用时，可以不焊接排针。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/jqkuH7q0cLElq6b4sBNrjO7gnhOgnOKFCUEBhJuQ.png" alt="jqkuH7q0cLElq6b4sBNrjO7gnhOgnOKFCUEBhJuQ.png" width="348" height="370"></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（3）转3.3V</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>      </strong> 电源方案采用LDO芯片，原理图中的LDO为友台半导体，最大输入电压30V，由于第一版中，Vin和Vout引脚画反了，所以实物使用的是AMS117-3.3，最大输入电压只有18V。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">       原理图已经更新为UMW(友台半导体)的芯片，如果使用AMS117-3.3，需要将原理图和PCB进行更改。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/tbcJ6jlHrI2B58zYf0AoA4kwnGfz2ZZtubyKq4Wv.png" alt="tbcJ6jlHrI2B58zYf0AoA4kwnGfz2ZZtubyKq4Wv.png" width="346" height="250"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（3）烧录接口</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>      </strong> N32G430芯片可以使用ST-Link进行烧录，官方的烧录接口加了串口，此处未添加。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/uUtssB39vleI22ZDoWZ9MOAS9fx2cJ1yR49xvQUt.png" alt="uUtssB39vleI22ZDoWZ9MOAS9fx2cJ1yR49xvQUt.png"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（4）电流测量</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>        </strong>电流测量采用的芯片为INA199A3，采集1mΩ电阻两端的压降，电压的放大倍数为200，理论最大测量电流16A。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">　　PCB中，VCC线和GND线以加粗至50ｍｉｌ。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/CaMbXz5Jeadi20Efw2tMJYkoMySq4m6BXXiSqsbI.png" alt="CaMbXz5Jeadi20Efw2tMJYkoMySq4m6BXXiSqsbI.png" width="539" height="373"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（5）电压测量</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>       </strong>电压测量采用100K电阻和10K电压进行分压。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/F1oMXpt0rIwfXQ1v6KxiACC9XP1DJ9MuFnqneZmi.png" alt="F1oMXpt0rIwfXQ1v6KxiACC9XP1DJ9MuFnqneZmi.png"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（6）0.96‘ TFTLCD彩屏</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>     </strong> TFTLCD彩屏采用SPI通信方式，采用软件SPI方式通信（硬件SPI通信移植失败），背光引脚与单片机的PWM输出引脚连接，可以通过改变PWM的脉冲宽度来调整LCD的亮度（软件未写此部分）。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">     TFTLCD在某宝只需６RMB，还是非常划算的。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/qFrgfwcqxKn4M4c5RndrxbltlTo6vRJFoLHuK79y.png" alt="qFrgfwcqxKn4M4c5RndrxbltlTo6vRJFoLHuK79y.png" width="481" height="252"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（7）RGB</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>      </strong> 原理图中设计的是3色RGB彩灯，由于RGB灯的器件封装没买对，实物中用两个LED代替了RGB使用。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/aSoVBzPdZROb12iHn50hM6stmeTy7FdF7qNCW5XU.png" alt="aSoVBzPdZROb12iHn50hM6stmeTy7FdF7qNCW5XU.png" width="498" height="227"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（8）MCU</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>        </strong> 电压与电流的测量引脚必须接到有ADC功能的IO口上。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/qGHZuPeu5JInZoTjU05INsAFssf03RMn9WM0nsm1.png" alt="qGHZuPeu5JInZoTjU05INsAFssf03RMn9WM0nsm1.png" width="732" height="604"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">5、软件设计</h3> <hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>见附件！</strong></p> <p> </p> <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">6、实物展示</h3> <hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（1）正面照片</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/GCtcBTiypitU4P6PuG0jLx3olwKuvbn10LTkO6ne.jpeg" alt="GCtcBTiypitU4P6PuG0jLx3olwKuvbn10LTkO6ne.jpeg" width="499" height="168"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（2）背面照片</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/xPA3KNSmzTIZ1SRRbZdG9q6y5xtDvYgDypjDQZLd.jpeg" alt="xPA3KNSmzTIZ1SRRbZdG9q6y5xtDvYgDypjDQZLd.jpeg" width="496" height="148"></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（3）启动照片</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/WJgLHOtxkeo5MDujpQKmMXsOxTSTyLV15Nw20ZO4.png" alt="WJgLHOtxkeo5MDujpQKmMXsOxTSTyLV15Nw20ZO4.png" width="563" height="263"></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（4）运行照片</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/EBvpUtNZC6TFfLB85vEOvft094BwfWIJMLrBkWyy.png" alt="EBvpUtNZC6TFfLB85vEOvft094BwfWIJMLrBkWyy.png" width="566" height="360"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（5）休眠照片</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/vu5wE6m7FUEnAb6zqNIXX5StPYVCFUqgpsP1JmFs.png" alt="vu5wE6m7FUEnAb6zqNIXX5StPYVCFUqgpsP1JmFs.png"></strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>（6）演示视频</strong></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p> </div>