Embest SBC9000, User Manual

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Embest Technology
Copyright © 2014-2015 Embest Technology SBC9000 User Manual
53
March, 2014.

root@sbc9000:~# date 031117002014
The terminal window will print information as shown below;
Table 6-2 Set system clock
Tue Mar 11 17:00:00 UTC 2014
2
）
Execute the following instruction to write system clock into RTC;

root@sbc9000:~# hwclock -w
3
）
Execute the following instruction to read RTC;

root@sbc9000:~# hwclock
The terminal window will print information as shown below;
Table 6-3 Read RTC
Tue Mar 11 17:01:01 2014 0.000000 seconds
The information above shows the system clock has been saved in hardware clock.
4
）
Reboot SBC9000 and execute the following instructions to restore system clock;

root@sbc9000:~# hwclock -s

root@sbc9000:~# date
The terminal window will print information as shown below;
Table 6-4 System clock
Tue Mar 11 17:03:33 UTC 2014
The information above shows the system clock has been restored from hard clock;
Note:

A coin battery with model code CR1220 is required on SBC9000
’s Expansion board to
maintain a correct hardware clock after the system reboots. The battery is not supplied
with the product and therefore needs to be purchased separately;