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    为什么cat value后显示0,实际测量电压为3.3V

    Scheduled Pinned Locked Moved Pi CM5
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    • W
      weiweiwei
      last edited by

      我按照步骤创建gpio115后,将pin40设置为out后,不管echo 0>value还是echo 1>value之后电压都是3.3V

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      • G
        george @weiweiwei
        last edited by

        @weiweiwei
        具体操作的是哪个GPIO,截图出来看一下,这种控制不到的问题大概率是这个口没有工作在gpio模式。

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        • W
          weiweiwei @george
          last edited by

          @george 微信截图_20240730154917.png
          我用的是编号为40的引脚

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          • W
            weiweiwei @weiweiwei
            last edited by

            @weiweiwei 我是用 echo 115 > /sys/class/gpio/export这个指令弄的

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