diff options
| author | Keith Packard <keithp@keithp.com> | 2012-10-25 13:42:10 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2012-10-26 14:07:04 -0700 |
| commit | e57ab2a7bfb69c0ef9b5b7fa8e53e20a500e7c6c (patch) | |
| tree | 08d961311a7d2e7612d5c9aa090fd7a1dcdd53e6 /src/stm/ao_timer.c | |
| parent | ccf0faa7d26d56deca7928b521d07be40504466a (diff) | |
altos: Provide ao_task_alarm_tick to reduce per-tick cost
Cache the next wakeup time and check that before jumping to the task
code.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/stm/ao_timer.c')
| -rw-r--r-- | src/stm/ao_timer.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/stm/ao_timer.c b/src/stm/ao_timer.c index d69035f8..e07625d8 100644 --- a/src/stm/ao_timer.c +++ b/src/stm/ao_timer.c @@ -44,7 +44,8 @@ void stm_tim6_isr(void) stm_tim6.sr = 0; ++ao_tick_count; #if HAS_TASK_QUEUE - ao_task_check_alarm((uint16_t) ao_tick_count); + if (ao_task_alarm_tick && (int16_t) (ao_tick_count - ao_task_alarm_tick) >= 0) + ao_task_check_alarm((uint16_t) ao_tick_count); #endif #if AO_DATA_ALL if (++ao_data_count == ao_data_interval) { |