RTEMS Ada User's Guide
The rtems.clock_get directive allows a task or an ISR to
obtain the current date and time or date and time related
information. The current date and time can be returned in
either native or UNIX-style format. Additionally, the
application can obtain date and time related information such as
the number of seconds since the RTEMS epoch, the number of ticks
since the executive was initialized, and the number of ticks per
second. The information returned by the
rtems.clock_get directive is
dependent on the option selected by the caller. This
is specified using one of the following constants
associated with the enumerated type
rtems.clock_get_options:
RTEMS.CLOCK_GET_TOD - obtain native style date and time
RTEMS.CLOCK_GET_TIME_VALUE - obtain UNIX-style
date and time
RTEMS.CLOCK_GET_TICKS_SINCE_BOOT - obtain number of ticks
since RTEMS was initialized
RTEMS.CLOCK_GET_SECONDS_SINCE_EPOCH - obtain number
of seconds since RTEMS epoch
RTEMS.CLOCK_GET_TICKS_PER_SECOND - obtain number of clock
ticks per second
Calendar time operations will return an error code if invoked before the date and time have been set.
RTEMS Ada User's Guide
Copyright © 1988-2003 OAR Corporation