STW TC1, User Manual

Page: 43 / 374

6 Software
User Manual 43/374
Path Input
information Output
information Description
p1:
< 0 >

the self-preservation is switched
Off
< 1 >

the self-preservation is switched
On
/proc/stw_shutdown/dplus - p1 This user space interface includes
the state of the ignition pin.
p1:
< 0 >

the state of the ignition is Off
< 1 >

the state of the ignition is On
6.3.2 Real Time Clock
The hardware Real Time Clock (RTC) is used to synchronize the kernel clock during the boot up and the shut
down sequence. During boot up the kernel clock is synchronized to the RTC. During shut down the RTC is
synchronized to the kernel clock.
High Level Hardware Access
Path Input
information Output
information Description
/etc/init.d/scripts/settime p1 - This shell script starts the clock synchronization
over SNTP.
settime is active as soon as it is written to rc.conf.
p1:
< start >

starts clock synchronization over SNTP
service
< stop >

syncs the RTC to kernel clock
NOTE:
The RTC is not used by the kernel during runtime.