By default, it looks for the assets/ntp_config.yaml configuration file in the current directory. If it cannot be found, it uses the built-in NTP address.

The content of ntp_config.yaml is as follows:

Config:
    - retry: 3
    - total_timeout_ms: 10000

NtpServers:
    - host: "ntp.xxx1.com"
      port: 123
    - host: "ntp1.xxx2.com"
      port: 234
    - host: "ntp2.xxx3.com"
      port: 456

Parameters
```
Usage:
./sync_time [OPTION...]

-b, --blocking  Run in blocking mode.
-d, --debug     Enable debugging
-h, --help      Print usage
```
Background time synchronization uses sync_time, and logs will be output to sync_time.log in the same directory as sync_time.

Blocking wait for time synchronization completion uses sync_time -b or sync_time --blocking, and logs will be output to stdout.

Check the deviation between RTC time and system time using sync_time -d or sync_time --debug, and logs will be output to stdout. This operation only synchronizes network time to the system time. The RTC has a minimum precision of seconds, and the current RTC time and system time will be output to stdout each time the RTC updates the second time.

中文

将网络时间同步到系统时间, 然后将系统时间同步到RTC中.

默认查找当前目录下的 assets/ntp_config.yaml 配置文件, 如果未能找到则使用内置的 NTP 地址.

ntp_config.yaml 内容形如:

Config:
    - retry: 3
    - total_timeout_ms: 10000

NtpServers:
    - host: "ntp.xxx1.com"
      port: 123
    - host: "ntp1.xxx2.com"
      port: 234
    - host: "ntp2.xxx3.com"
      port: 456

参数
```
Usage:
./sync_time [OPTION...]

-b, --blocking  Run in blocking mode.
-d, --debug     Enable debugging
-h, --help      Print usage
```
后台同步时间使用 sync_time, 日志将会输出到 sync_time 相同目录下的 sync_time.log 中.

阻塞等待时间同步完成使用 sync_time -b 或 sync_time --blocking, 日志将会输出到 stdout 中.

检查RTC时间与系统时间的误差使用 sync_time -d 或 sync_time --debug, 日志将会输出到 stdout 中. 该操作仅同步网络时间到系统时间中, 该 RTC 最小精度为秒, 在每次 RTC 更新秒钟时间时将当前 RTC 时间和系统时间输出到 stdout.

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