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sched: Move timer dispatch loop to board code

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Rename sched_timer_kick() to sched_timer_dispatch() and move its loop
into its callers in the board code.  This eliminates the need to
export timer_try_set_next() from the board code.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-03-27 16:38:01 -04:00
parent 7436ec093a
commit 6d05dd07f5
8 changed files with 63 additions and 50 deletions
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6
docs/Code_Overview.md
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@ -58,9 +58,9 @@ Timer functions are scheduled by calling sched_add_timer() (located in
**src/sched.c**). The scheduler code will arrange for the given
function to be called at the requested clock time. Timer interrupts
are initially handled in an architecture specific interrupt handler
(eg, **src/avr/timer.c**), but this just calls sched_timer_kick()
located in **src/sched.c**. The timer interrupt leads to execution of
schedule timer functions. Timer functions always run with interrupts
(eg, **src/avr/timer.c**) which calls sched_timer_dispatch() located
in **src/sched.c**. The timer interrupt leads to execution of schedule
timer functions. Timer functions always run with interrupts
disabled. The timer functions should always complete within a few
micro-seconds. At completion of the timer event, the function may
choose to reschedule itself.