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    IIC通信异常

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    • S
      shuaige LV 6 last edited by

      在确认了地址、供电、上拉电阻、晶振都正常的情况下,IIC出现Address + Write bit transmitted,ACK not received的问题,大家有遇到过吗,指导一下
      d0eaa441-d8ab-4bba-a75c-8306582183e4-image.png

      设备是挂载上去的,调整了IIC时钟频率也没什么效果
      3044164e-996f-498f-b33d-7815cdb8ffcf-image.png

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        wyljkl LV 7 @shuaige last edited by

        @shuaige 用逻辑分析仪抓一下呢,看看数据对不对,是不是因为从机没有ack回应

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          shuaige LV 6 @wyljkl last edited by

          @wyljkl 示波器看了波形了,就是没有ack回应,不知道什么原因

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            wyljkl LV 7 @shuaige last edited by

            @shuaige 那就是你从机的问题啦,跟主控这边没有关系

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              shuaige LV 6 @wyljkl last edited by

              @wyljkl 从机一般只要有供电肯定就会有应答的啊

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                shuaige LV 6 last edited by

                已解决,从机虚焊了一颗电阻

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