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    rs485通信问题

    其它全志芯片讨论区
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    • Z
      ZiFeiYu LV 5 last edited by

      使用的是T113芯片,设备树和原理图如下,板子启动后dev目录下也有对应的ttyS2,但是usb转rs485连接对应端口无反应。不知道怎么回事。请大佬救命
      16eb4433-b998-4f82-952a-02d3e68d506d-image.png
      254b5d51-0ef9-4357-92e4-c66073e71f7b-image.png
      21989a7b-b336-4c7b-afd9-549c220e202f-image.png
      569ee6e1-26eb-4793-8b8b-f8ad0d8d97b9-image.png
      c75c03d8-3561-4bf9-a32e-18dea0cf1012-image.png

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      • J
        Jingyan LV 5 @ZiFeiYu last edited by

        @zifeiyu EN脚直接接到电源,只能实现单向通信,看下单TX或者RX方向正不正常吧

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        • J
          jxmlegend_123 LV 4 last edited by

          先测试ttl串口通信是否正常,如果正常的话,可能是控制485端口时序没有控制好

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          • M
            Maihuanyi LV 5 @ZiFeiYu last edited by

            @zifeiyu MAX13487是自动收发的RS485芯片,设备树不需要添加584180ca-7c7d-43a1-a302-40a04476b4b5-image.png

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