【安信可NB-IoT开发板EC-01F-Kit】第一篇：初识EC-01F-Kit
本帖最后由 oxygen_sh 于 2022-1-13 21:52 编辑<p style="margin-top: 23px; margin-bottom: 22px; text-align: justify;"><span style="font-size:22pt"><span style="line-height:240%"><span style="font-family:Calibri"><b><span style="font-size:22.0000pt"><span style="font-family:宋体"><font face="宋体">一、开发板第一印象</font></span></span></b></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">开发板组成：开发板，天线，移动数据卡</font></span></span></span></span></p>
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<p style="margin-top:23px; margin-bottom:22px; text-align:justify"><span style="font-size:22pt"><span style="line-height:240%"><span style="font-family:Calibri"><b><span style="font-size:22.0000pt"><span style="font-family:宋体"><font face="宋体">二、开发板资料学习</font></span></span></b></span></span></span></p>
<p style="margin-top: 17px; margin-bottom: 17px; text-align: justify;"><span style="font-size:16pt"><span style="line-height:172%"><span style="font-family:Arial"><b><span style="font-size:16.0000pt"><span style="font-family:黑体"><font face="黑体">主芯片</font></span></span></b></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">主芯片采用移芯通信的</font><font face="Calibri">EC616S</font><font face="宋体">，应该是该公司的第二款量产</font><font face="Calibri">NB-IOT</font><font face="宋体">芯片。下表是</font><font face="Calibri">EC616</font><font face="宋体">的基本规格参数。</font></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"><b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal"><font face="Helvetica">芯片型号</font></span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>EC616S</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"> <b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal"><font face="Helvetica">频段</font></span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>663MHz-2200MHz</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"> <b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal"><font face="Helvetica">协议版本</font></span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>3GPP R13/R14</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"> <b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal"><font face="Helvetica">工作电压</font></span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>2.2V ~ 4.5V</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"> <b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal"><font face="Helvetica">工作温度</font></span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>-40°C ~ +85°C</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"> <b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal">PSM功耗</span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>0.8uA</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"> <b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal">IDLE功耗（DRX 2.56s）</span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>0.11mA</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"> <b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal"><font face="Helvetica">内置</font>PA输出功率</span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>23dBm</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"> <b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal">CPU Core</span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>Cortex-M3</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"> <b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal"><font face="Helvetica">硬件外设</font></span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>SPI×2，I2C×2，GPIO×16，UART×3，PWM×6，ADC×4，USIM×1</span></span></span></span></span></span></span></span></span></p>
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<p class="p" style="text-align:left"><span style="font-size:12pt"><span style="word-break:break-all"><span style="line-height:21.0000pt"><span style="font-family:Calibri"><b><span class="15" style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-weight:bold"><span style="font-style:normal"><font face="Helvetica">封装</font></span></span></span></span></span></span></b><span style="font-size:8.0000pt"><span style="font-family:Helvetica"><span style="color:#000000"><span style="letter-spacing:0.0000pt"><span style="font-style:normal"><font face="Helvetica">：</font>QFN52 6mm*6mm*0.9mm</span></span></span></span></span></span></span></span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">另外，跟模块评测直接相关的一条信息是，</font><font face="Calibri">EC616S</font><font face="宋体">默认情况下，对其串口</font><font face="Calibri">0</font><font face="宋体">和串口</font><font face="Calibri">1</font><font face="宋体">有如下使用定义：</font></span></span></span></span></p>
<ul>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:Calibri"><font face="宋体">串口</font><font face="Calibri">0</font><font face="宋体">做</font><font face="Calibri">log</font><font face="宋体">输出口，默认</font><font face="Calibri">log</font><font face="宋体">输出波特率是</font><font face="Calibri">3000000bps</font><font face="宋体">，即</font><font face="Calibri">3Mbps</font></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">，</font></span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:Calibri"><font face="宋体">串口</font><font face="Calibri">1</font><font face="宋体">做</font><font face="Calibri">AT</font><font face="宋体">收发接口</font></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">，默认波特率是</font><font face="Calibri">9600bps</font></span></span></span></span></li>
</ul>
<p style="margin-top:17px; margin-bottom:17px; text-align:justify"> </p>
<p style="margin-top:17px; margin-bottom:17px; text-align:justify"><span style="font-size:16pt"><span style="line-height:172%"><span style="font-family:Arial"><b><span style="font-size:16.0000pt"><span style="font-family:黑体"><font face="黑体">模组</font></span></span></b></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">模组型号是</font><font face="Calibri">EC-01F</font><font face="宋体">。其他两款</font><font face="Calibri">EC-01</font><font face="宋体">和</font><font face="Calibri">EC-01G</font><font face="宋体">。这三款模组的参数对比如下表：</font></span></span></span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:12.0000pt"><span style="font-family:宋体"><font face="宋体">下面是模组手册上的模组原理图，右边是主芯片</font>EC616S及周边电路，包括外部时钟晶振，RF滤波电路等。</span></span></span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:12.0000pt"><span style="font-family:宋体"><font face="宋体">模块使用上的一些注意事项：</font></span></span></span></span></p>
<ul>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:12.0000pt"><span style="font-family:宋体"><font face="宋体">推荐</font> 3.3V-4.5V 电压，峰值 500mA 以上电流</span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:12.0000pt"><span style="font-family:宋体"><font face="宋体">建议使用</font> LDO 供电；如使用 DC-DC 建议纹波控制在 50mV 以内。</span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:12.0000pt"><span style="font-family:宋体">DC-DC 供电电路建议预留动态响应电容的位置，可以在负载变化较大时，优化输纹波。</span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:12.0000pt"><span style="font-family:宋体">3.3V-4.5V 电源接口建议增加 ESD 器件。</span></span></span></span></li>
</ul>
<p style="text-align:justify"> </p>
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<li style="list-style-type:none"> </li>
</ol>
<p style="margin-top:17px; margin-bottom:17px; text-align:justify"><span style="font-size:16pt"><span style="line-height:172%"><span style="font-family:Arial"><b><span style="font-size:16.0000pt"><span style="font-family:黑体"><font face="黑体">开发板电路</font></span></span></b></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">开发板上包括如下电路：</font></span></span></span></span></p>
<ul>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">5V</font><font face="宋体">转</font><font face="Calibri">3.3V LDO</font></span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">模组</font></span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">SMA</font><font face="宋体">天线座子</font></span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">USIM</font><font face="宋体">卡槽</font></span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">USB-UART</font><font face="宋体">芯片</font></span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">按键</font></span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">LED</font></span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">连接排针</font></span></span></span></span></li>
</ul>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">注意事项：</font></span></span></span></span></p>
<ul>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:Calibri">EC-01F-Kit V1.0 <font face="宋体">版本中板载 </font><font face="Calibri">Micro-USB </font><font face="宋体">口和 </font><font face="Calibri">TX1</font><font face="宋体">、</font><font face="Calibri">RX1 </font><font face="宋体">只能使用其中一种进行通讯和烧录，当串口芯片存在的时候只能使用板载 </font><font face="Calibri">Micro-USB </font><font face="宋体">口进行通讯和烧录。若想使用 </font><font face="Calibri">TX1 </font><font face="宋体">和 </font><font face="Calibri">RX1 </font><font face="宋体">排针进行通讯及烧录需要去掉串口芯片，此时 </font><font face="Calibri">Micro-USB </font><font face="宋体">口不支持通讯及烧录。</font><font face="Calibri">EC-01F-Kit V2.0 </font><font face="宋体">版本 </font><font face="Calibri">Micro-USB </font><font face="宋体">口和 </font><font face="Calibri">TX1</font><font face="宋体">、</font><font face="Calibri">RX1 </font><font face="宋体">可同时使用进行通讯。</font></span></span></span></span></li>
<li style="text-align:justify" value="50"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">对照开发板文档中的图</font><font face="Calibri">9</font><font face="宋体">，确定了收到的芯片版本为</font><font face="Calibri">V1.0</font><font face="宋体">版。另外，文档规格书</font><font face="Calibri">v2.0.1</font><font face="宋体">上的开发板原理图应该为</font><font face="Calibri">V2.0</font><font face="宋体">版本开发板的原理图，不是</font><font face="Calibri">V1.0</font><font face="宋体">的板子的原理图。使用时要注意一下。</font></span></span></span></span></li>
</ul>
<p style="margin-top:23px; margin-bottom:22px; text-align:justify"> </p>
<p style="margin-top:23px; margin-bottom:22px; text-align:justify"><span style="font-size:22pt"><span style="line-height:240%"><span style="font-family:Calibri"><b><span style="font-size:22.0000pt"><span style="font-family:宋体"><font face="Calibri">三、AT</font><font face="宋体">通信问题解决过程</font></span></span></b></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">通过</font><font face="Calibri">USB</font><font face="宋体">给开发板上电后，发现通过</font><font face="Calibri">USB</font><font face="宋体">（</font><font face="Calibri">USB-UART</font><font face="宋体">）进行</font><font face="Calibri">AT</font><font face="宋体">指令收发有问题，具体表现向模组发送</font><font face="Calibri">AT</font><font face="宋体">指令后没有响应。</font></span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">又尝试一下通过</font><font face="Calibri">USB</font><font face="宋体">来更新模组的固件。发现固件能够更新成功。</font></span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">更新过固件后，又发送</font><font face="Calibri">AT</font><font face="宋体">指令，还是没有反应。稍微有些慌了，想是不是遇到了一个坏板子。暂时停下，翻了翻先前的测评报告，貌似这是一个较普遍会遇到的问题，好像问题的矛头指向了板载的</font><font face="Calibri">CH340</font><font face="宋体">这颗</font><font face="Calibri">USB-UART</font><font face="宋体">芯片上。</font></span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">按照得到的启发，拿了一根</font><font face="Calibri">USB</font><font face="宋体">转</font><font face="Calibri">UART</font><font face="宋体">电缆，直接使用板上排针</font><font face="Calibri">TX1</font><font face="宋体">和</font><font face="Calibri">RX1</font><font face="宋体">来进行通信。结果还是不行。使用示波器测量一下波形，向模组发送的信号波形不对，低电平太高，完全拉不到地。板载</font><font face="Calibri">USB-UART</font><font face="宋体">芯片和外部电缆都使用</font><font face="Calibri">TX1</font><font face="宋体">和</font><font face="Calibri">RX1</font><font face="宋体">，这两部分有冲突，导致信号不对。</font></span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">想了想，终于下定决心，把</font><font face="Calibri">CH340</font><font face="宋体">去掉。说干就干。找了许久未用的烙铁，三下五除二，把芯片拿掉了。再一次使用</font><font face="Calibri">USB</font><font face="宋体">转</font><font face="Calibri">UART</font><font face="宋体">电缆，发送</font><font face="Calibri">AT</font><font face="宋体">命令，尝试几个命令后，突然收到了模组发回的数据。在这之后，</font><font face="Calibri">AT</font><font face="宋体">命令就百试不爽了。</font></span></span></span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"> </p>
<p> </p>
<p> </p>
<p>关于通信问题可以参考，网友<a href="https://home.eeworld.com.cn/space-uid-976840.html" target="_blank">kit7828</a>的测评</p>
<p>是否是</p>
<p> </p>
<p>https://bbs.eeworld.com.cn/thread-1189540-1-1.html</p>
<p>因为拿到的开发板是V1.0版本，通过扩展PIN TX1/RX1与别的MCU相连接时，需要将CH340去掉才行。后来再仔细看了开发板的资料，发现其实文档上有写这块的。谢谢@Jacktang的提醒！</p>
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