<p><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;"><em> 1、项目功能介绍</h3> <hr class="horizontal-splitline normal-bold-2" /> <div class="lake-content"> <p class="ne-p"><span class="ne-text">温湿度仪功能实现：</span></p> <ul> <li class="ne-p"><span class="ne-text">温湿度获取并通过数码管显示</span></li> <li class="ne-p"><span class="ne-text">检测电池电压</span></li> </ul> <p>&nbsp;</p> <p><span class="ne-text">由于项目使用stm32g030k6t6做主控，温湿度仪默认不开机进入睡眠模式，</span><span class="ne-text">当WAKE键按下时，触发中断，结束睡眠模式，执行按键判断，获取温湿度并启动数码管进行显示</span></p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> </div> <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;"></em>2、硬件部分</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;">测试LED：在桌面温湿度仪上，有两个测试LED，一个接入单片机-PB7引脚用于测试GPIO输出功能；另外一个接入74HC595用于测试移位寄存器输出功能；</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/oshwhub/6867ab9dbd434538be3226ea13f3d205.png" alt="" width="304" height="246" /></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;">唤醒按键：按键一端是连接GND，另一端是连接GPIO-PB5，当按键按下产生低电平，触发中断，为使单片机能正常读取到电平变化，应使引脚保持高电平</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/oshwhub/534ac16324c14df0aa24d596d1a68ab5.png" alt="" width="305" height="214" /></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;">&nbsp;</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;">SHT40模块：<span class="ne-text">SHT40温湿度传感器模块用于检测温湿度，SHT40采用IIC进行通信，模块上R8、R9是IIC通信的上拉电阻，起到&ldquo;线与&rdquo;的作用，支持挂载多个设备。</span><strong>SHT40传感器模块的引脚和插座的要能对应插上，注意正反方向，否则可能会损坏模块</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;">&nbsp;</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;">数码管显示电路：使用红色共阴极数码管，由三个SN74HC595PWR驱动，数码管的六个阴极接在一个595芯片用于指定某一个位导通，两个数码管的阳极分别在另两个595芯片用于显示数字的选择</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/oshwhub/c4bb2fe108304f54be984cba5e172595.png" alt="" width="699" height="137" /></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;">MCU电路：</p> <p id="u3b7159ee" class="ne-p"><span class="ne-text">STM32G0系列有四种休眠模式；</span></p> <ul class="ne-ul"> <li id="ue46f575c" data-lake-index-type="0"><span class="ne-text">低功耗运行模式（降低CPU频率，系统仍在运行）</span></li> <li id="uf1a0a186" data-lake-index-type="0"><span class="ne-text">睡眠模式（系统进入睡眠，任意中断/事件唤醒）</span></li> <li id="u20e290b9" data-lake-index-type="0"><span class="ne-text">停止模式（系统进入停止，支持任意外部中断和RTC闹钟唤醒）</span></li> <li id="u2f66de2e" data-lake-index-type="0"><span class="ne-text">待机模式（系统进入待机，支持RTC闹钟唤醒，WKUP、NRST引脚唤醒以及IWDG复位唤醒，打开了LSI和LSE）</span></li> </ul> <p id="u461dcb3d" class="ne-p"><span class="ne-text">注意以上模式均不可进行Debuge调试，系统时钟已经关闭；且设置为低功耗模式后，无法下载代码，需要唤醒后才能进行下载；详细说明可以查看具体数据手册。</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 pap-left-indent-1.6em" style="line-height: 1.8;"><img src="//image.lceda.cn/oshwhub/182646c861584aaa9179bdc516d34311.png" alt="" width="482" height="217" /></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;"><em>3、软件部分</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;">本次项目采用keil5加stm32cubemx编程，使用库为HAL库</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;">&nbsp;</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;"></em>4、元器件采购</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;">本项目使用传感器为盛思锐提供的SHT40温湿度传感器模块如下图，</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/oshwhub/f0fa55fd775541b1bec4223b15bdffb5.jpg" alt="" width="393" height="393" /></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;">自己在立创商城采购需要注意不要买到单一传感器，因为自己焊接很容易焊错，BOOM表一键下单需要注意仅购买了传感器的排母，传感器模块需另行购买</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;">注：如果是新手焊接，部分元件引脚细小，如SN74HC595PWR，为防止因焊坏元件，可以多采购1枚</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布局有些不合理，数码管背面引脚放置有5号电池盒会妨碍焊接，在元器件购买时可以选择带导线的5号电池盒，避开数码管引脚</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;">&nbsp;</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;">&nbsp;</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、大赛LOGO验证</h3> <hr class="horizontal-splitline normal-bold-2" /> <p style="line-height: 1.8;"><img src="//image.lceda.cn/oshwhub/d53e772b942c4864b5ced9e82c4886d7.jpg" alt="" width="353" height="371" /></p> </div></p>