mirror of
https://github.com/Stichting-MINIX-Research-Foundation/u-boot.git
synced 2025-11-03 18:55:00 -05:00
ea287debe1
add SNTP support and expand time server and time offset fields of DHCP support. See doc/README.SNTP * Patch by Steven Scholz, 13 Dec 2004: Fix bug in at91rm920 ethernet driver
18 lines
737 B
Plaintext
18 lines
737 B
Plaintext
To use SNTP support, add a define CFG_CMD_SNTP to CONFIG_COMMANDS in
|
|
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
|
|
enviroment 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.
|