SNTPSimple Network Time Protocol

Simple Network Time Protocol(SNTP)

• Get accurate date and time from SNTP server– i.e. 131.215.254.2

• Make Standard Time functions (ANSI C) to return accurate date and time– i.e. time() or localtime().

Simple Network Time Protocol(SNTP)

• APIs– NAinstallSntpTime– NAinstallTimeZone– NArestartSntpServer– NAgetSntpTime

Simple Network Time Protocol(SNTP)

• NAinstallSntpTime– Establish SNTP server connection– Start SNTP (run as a separate thread)– Setup SNTP for standard time functions

• User’s Callback– Used to notify user the SNTP status.– i.e. Time is successfully (unsuccessfully)

updated or obtained

Simple Network Time Protocol(SNTP)

• NAinstallTimeZone– Setup local time zone relative to GMT

• NArestartSntpServer– Restart SNTP with different NTP servers– It should be called in user’s callback function

Simple Network Time Protocol(SNTP)

• Define APP_USE_NETWORK_TIME in appconf.h to include SNTP in BSP– BSP will setup SNTP and time zone– SNTP server address & time zone are stored in NVRAM

• USA Eastern Standard Time is default time zone

• 5 hour is default time to re-synchronize SNTP server– Once time is obtained from SNTP server, use system clock (ticks)