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    RTC时间保存问题

    Scheduled Pinned Locked Moved Pi CM5
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    • J
      jugg @george
      last edited by

      @george
      需要安装
      sudo apt install systemd-timesyncd
      这样就行了

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      • G
        george @jugg
        last edited by

        @jugg
        测试如下核心板位置,关机的状态下电源是否正常?
        41454d43-fe36-4d1a-9620-638b680584e0-image.png

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        • J
          jugg @george
          last edited by jugg

          @george
          e80819dc-fb31-451a-b440-26ab0ac50369-lQDPJxOp5s9AMoHNBQDNAhqw8QGX8PGf_jsHG8U8n05uAA_538_1280.jpg
          这样加的电池
          测试了有电压
          板子能记录上一次关机的时间
          但是下次开机还是上次关机的时间
          关机的时候时间没跑

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          • G
            george @jugg
            last edited by

            This post is deleted!
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            • J
              jugg
              last edited by

              这个问题有办法吗
              还是说一定要加座子

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              • G
                george @jugg
                last edited by

                @jugg
                1.确认你外部电源供电电压是多少V
                2.关机之前查看一下硬件RTC的时钟情况,使用如下命令:

                cat /proc/driver/rtc
                

                3.关机一段时间再开机,再次查看硬件RTC时间

                cat /proc/driver/rtc
                

                然后把结果发上来。

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                • J
                  jugg @george
                  last edited by jugg

                  @george

                  1. 供电是3.3V

                  联网更新时间之后
                  e8862af4-83f9-4c6d-987b-8abfa3a26b5a-1731635404132_91630823-0F20-4f39-966D-14EFAA31F0A4.png

                  关机 断开网络 几分钟之后开机
                  e45956bc-d59e-4ee8-9f7d-5e3972e07b88-1731635882014_B91ED87A-E4CF-44dc-9E2F-2427C3682259.png

                  本机的时间还是几分钟之前的

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                  • G
                    george @jugg
                    last edited by george

                    @jugg
                    从上面的信息能够确认RTC的时间是正常的,关机时候是9:49,再开机是:9:57,只是RTC时间没有同步到系统。
                    日志也提供了方法:

                    timedatectl set-local-rtc 0
                    
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                    • J
                      jugg @george
                      last edited by

                      @george
                      RTC时间同步到系统需要手动操作吗?

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                      • J
                        jugg @george
                        last edited by jugg

                        @george
                        手动操作也无法把rtc时间同步到系统中
                        2cc45a39-d1bb-4dd9-9ed0-f680b96e157b-image.png

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                        • G
                          george @jugg
                          last edited by

                          @jugg
                          CST时间和UTC时间的区别,并不是不能同步。也不是RTC不工作。系统层的问题百度一下。

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