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    RTC时间保存问题

    Scheduled Pinned Locked Moved Pi CM5
    17 Posts 2 Posters 804 Views
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    • G
      george @jugg
      last edited by

      @jugg
      原因是系统没有同步RTC的硬件时钟,而不是说硬件RTC没有工作。

      J 1 Reply Last reply Reply Quote 0
      • J
        jugg @george
        last edited by

        @george
        开机后手动同步
        timedatectl set-local-rtc 1 --adjust-system-clock
        hwclock -s
        这样也不行

        G 1 Reply Last reply Reply Quote 0
        • G
          george @jugg
          last edited by

          @jugg
          你用的CM5-EVB?在哪里增加了电池?

          J 3 Replies Last reply Reply Quote 0
          • J
            jugg @george
            last edited by

            @george
            加了座子

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            • J
              jugg @george
              last edited by

              @george
              CM5-EVB debian11的系统

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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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