From ea287debe1980182adbe8c63b71bb82193dad5b7 Mon Sep 17 00:00:00 2001 From: wdenk Date: Fri, 1 Apr 2005 00:25:43 +0000 Subject: * 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 --- doc/README.SNTP | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 doc/README.SNTP (limited to 'doc/README.SNTP') 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. -- cgit v1.1