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| author | wdenk <wdenk> | 2005-04-01 00:25:43 +0000 |
|---|---|---|
| committer | wdenk <wdenk> | 2005-04-01 00:25:43 +0000 |
| commit | ea287debe1980182adbe8c63b71bb82193dad5b7 (patch) | |
| tree | 34044b91763e6e85704b7a54acd34c042931461d /doc/README.SNTP | |
| parent | ef2807c667a91135fbb91b805b852ccfbff03587 (diff) | |
| download | u-boot-imx-ea287debe1980182adbe8c63b71bb82193dad5b7.zip u-boot-imx-ea287debe1980182adbe8c63b71bb82193dad5b7.tar.gz u-boot-imx-ea287debe1980182adbe8c63b71bb82193dad5b7.tar.bz2 | |
* Patch by Masami Komiya, 30 Mar 2005:
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
Diffstat (limited to 'doc/README.SNTP')
| -rw-r--r-- | doc/README.SNTP | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/doc/README.SNTP b/doc/README.SNTP new file mode 100644 index 0000000..fd6f209 --- /dev/null +++ b/doc/README.SNTP @@ -0,0 +1,17 @@ +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. |