【创龙TL570x-EVM】测评04 - CAN测试
<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:18.0000pt"><span style="font-family:黑体"><font face="黑体">【创龙</font><font face="黑体">TL570x-EVM】测评0</font></span></span><span style="font-size:18.0000pt"><span style="font-family:黑体"><font face="黑体">4</font></span></span><span style="font-size:18.0000pt"><span style="font-family:黑体"> <font face="黑体">- </font></span></span><span style="font-size:18.0000pt"><span style="font-family:黑体"><font face="黑体">CAN测试</font></span></span></span></span></span></p><p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:18.0000pt"><span style="font-family:黑体"><font face="黑体">一、个人使用的是</font><font face="黑体">CANPro分析仪-创芯科技公司出品的，双路CAN。</font></span></span></span></span></span></p>
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<p style="text-align:left"><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">二、评估板</font><font face="Calibri">CAN</font><font face="宋体">设置</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">进入评估板文件系统，执行如下命令配置</font><font face="Calibri">CAN1</font><font face="宋体">接口比特率为</font><font face="Calibri">1MHz</font><font face="宋体">，并启动</font><font face="Calibri">CAN</font><font face="宋体">总</font></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">线</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="Calibri">canconfig can0 bitrate 1000000 </font></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"> <font face="Calibri">// </font><font face="宋体">设置通讯频率为</font><font face="Calibri">1M</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="Calibri">canconfig can0 start</font></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"> <font face="Calibri">// </font><font face="宋体">启动</font><font face="Calibri">CAN</font><font face="宋体">通讯 电路板标签为</font><font face="Calibri">CAN1 CAN2 </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="Calibri">canconfig can0 s</font></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">top // </font><font face="宋体">停止</font><font face="Calibri">CAN</font><font face="宋体">通讯 当前使用的</font><font face="Calibri">CAN0</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="Calibri">candump // </font><font face="宋体">执行如下命令，接收 </font><font face="Calibri">PC </font><font face="宋体">端发送的数据</font></span></span></span></span></p>
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<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">Can</font><font face="宋体">工具发送数据后，打印出来，数据格式：</font><font face="Calibri">ID </font><font face="宋体">长度 数据</font></span></span></span></span></span></p>
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<li align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">硬件资料查阅</font></span></span></span></span></span></li>
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<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">通过此功能的学习，又发到了</font><font face="Calibri">ISO1050</font><font face="宋体">这个芯片，</font><font face="Calibri">ISO1050</font><font face="宋体">隔离式</font><font face="Calibri">CAN</font><font face="宋体">收发器，这块芯片不错替代了我们之前设计电路的模式（隔离芯片</font><font face="Calibri">+CAN</font><font face="宋体">芯片），体积有所缩小，电路设计不易出错。</font></span></span></span></span></span></p>
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<li align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">AM5708</font><font face="宋体">芯片手册查阅</font></span></span></span></span></span></li>
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<p align="justify" style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">刨根问底，刨到其最深处为止，对照</font><font face="Calibri">MCU</font><font face="宋体">芯片手册学习。</font></span></span></span></span></span></p>
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<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">五、</font><font face="Calibri">DCAN</font><font face="宋体">与</font><font face="Calibri">CAN</font><font face="宋体">的区别</font></span></span></span></span></span></p>
<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">CANFD</font><font face="宋体">：可以理解成</font><font face="Calibri">CAN</font><font face="宋体">协议的升级版，只升级了协议，物理层未改变</font></span></span></span></span></span></p>
<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">CAN</font><font face="宋体">与</font><font face="Calibri">CANFD</font><font face="宋体">主要区别：传输速率不同，数据长度不同，帧格式不同，</font><font face="Calibri">ID</font><font face="宋体">长度不同</font></span></span></span></span></span></p>
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<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">ID</font><font face="宋体">长度不同</font></span></span></span></span></span></p>
<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">CAN</font><font face="宋体">标准帧</font><font face="Calibri">ID</font><font face="宋体">长度最长</font><font face="Calibri">11bit</font></span></span></span></span></span></p>
<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">CANFD</font><font face="宋体">标准帧</font><font face="Calibri">ID</font><font face="宋体">长度可扩展到</font><font face="Calibri">12bit</font></span></span></span></span></span></p>
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<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">充满了好奇心，百度了一下，</font><font face="Calibri">2014</font><font face="宋体">年</font><font face="Calibri">CAN-FD</font><font face="宋体">就出现了，为什么时至今日大家用的基本上都是</font><font face="Calibri">8</font><font face="宋体">位数据位的</font><font face="Calibri">CAN</font><font face="宋体">通讯呢？</font></span></span></span></span></span></p>
<p align="justify" style="text-align:justify"><span style="font-size:10.5pt"><span style="text-justify:inter-ideograph"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">目前市场上的</font><font face="Calibri">can</font><font face="宋体">分析仪大多也都不支持</font><font face="Calibri">CAN-FD</font><font face="宋体">，想用到</font><font face="Calibri">CAN-FD</font><font face="宋体">分析仪的时候可需要仔细问清楚。如果想购买</font><font face="Calibri">CANFD</font><font face="宋体">工具可以直接在淘宝上搜</font><font face="Calibri">CANFD</font><font face="宋体">分析仪</font></span></span></span></span></span></p>
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