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u-boot/doc/README.SNTP
Thomas Weber c46bf09e0b doc: Fix some typos in different files
adresses/addresses
alernate/alternate
asssuming/assuming
calcualted/calculated
enviroment/environment
evalutation/evaluation
falsh/flash
labled/labeled
paramaters/parameters

Signed-off-by: Thomas Weber <thomas@tomweber.eu>
Acked-by: Anatolij Gustschin <agust@denx.de>
2012-03-27 13:31:37 +02:00

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Text

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