1To use SNTP support, add define CONFIG_CMD_SNTP to the 2configuration file of the board. 3 4The "sntp" command gets network time from NTP time server and 5syncronize RTC of the board. This command needs the command line 6parameter of server's IP address or environment variable 7"ntpserverip". The network time is sent as UTC. So if you want to 8set local time to RTC, set the offset in second from UTC to the 9environment variable "time offset". 10 11If the DHCP server provides time server's IP or time offset, you 12don't need to set the above environment variables yourself. 13 14Current limitations of SNTP support: 151. The roundtrip time is ignored. 162. Only the 1st NTP server IP, in the option ntp-servers of DHCP, will 17 be used. 18