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| author | Kevin O'Connor <kevin@koconnor.net> | 2017-03-24 23:01:08 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2017-03-26 22:45:58 -0400 |
| commit | 60e488eb177a35084669cb85d81131ce95eac959 (patch) | |
| tree | 2a0b406f4e0b6e54ef495140573daf6426ca6b0e /src/avr/timer.c | |
| parent | 14340ac4df4c58bab4b5fc4c9e4746e33958c081 (diff) | |
| download | kutter-60e488eb177a35084669cb85d81131ce95eac959.tar.gz kutter-60e488eb177a35084669cb85d81131ce95eac959.tar.xz kutter-60e488eb177a35084669cb85d81131ce95eac959.zip | |
timer: Allow board code to define its own timer_is_before implementation
Move sched_is_before() from sched.c to timer_is_before() in the board
specific timer code. This allows the board code to provide its own
definition.
Also, remove the sched_from_us() and sched_read_time() wrapper
functions and change the callers to directly invoke timer_from_us() /
timer_read_time().
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/avr/timer.c')
| -rw-r--r-- | src/avr/timer.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/avr/timer.c b/src/avr/timer.c index 7b5facca..e96b88bf 100644 --- a/src/avr/timer.c +++ b/src/avr/timer.c @@ -25,6 +25,15 @@ timer_from_us(uint32_t us) return us * (F_CPU / 1000000); } +// Return true if time1 is before time2. Always use this function to +// compare times as regular C comparisons can fail if the counter +// rolls over. +uint8_t +timer_is_before(uint32_t time1, uint32_t time2) +{ + return (int32_t)(time1 - time2) < 0; +} + static inline uint16_t timer_get(void) { |