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Commit | Line | Data |
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b5501f7d JL |
1 | To use SNTP support, add define CONFIG_CMD_SNTP to the |
2 | configuration file of the board. | |
ea287deb WD |
3 | |
4 | The "sntp" command gets network time from NTP time server and | |
5 | syncronize RTC of the board. This command needs the command line | |
6 | parameter of server's IP address or environment variable | |
7 | "ntpserverip". The network time is sent as UTC. So if you want to | |
8 | set local time to RTC, set the offset in second from UTC to the | |
c46bf09e | 9 | environment variable "time offset". |
ea287deb WD |
10 | |
11 | If the DHCP server provides time server's IP or time offset, you | |
12 | don't need to set the above environment variables yourself. | |
13 | ||
14 | Current limitations of SNTP support: | |
15 | 1. The roundtrip time is ignored. | |
16 | 2. Only the 1st NTP server IP, in the option ntp-servers of DHCP, will | |
17 | be used. |