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| author | Kevin O'Connor <kevin@koconnor.net> | 2019-07-27 22:05:50 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2019-07-27 22:05:50 -0400 |
| commit | 92c2fbdce410e3c679be4b7edc3551b1e14217ce (patch) | |
| tree | bc258c044dbeb3852ad2b5898072e7caf4fa04c7 /src/generic/armcm_timer.c | |
| parent | 7bc0a261abdf295d0f35b89bfe51168a9f1c0b37 (diff) | |
| download | kutter-92c2fbdce410e3c679be4b7edc3551b1e14217ce.tar.gz kutter-92c2fbdce410e3c679be4b7edc3551b1e14217ce.tar.xz kutter-92c2fbdce410e3c679be4b7edc3551b1e14217ce.zip | |
armcm_timer: Improve comments on wrap_timer code
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/generic/armcm_timer.c')
| -rw-r--r-- | src/generic/armcm_timer.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/generic/armcm_timer.c b/src/generic/armcm_timer.c index dad768e4..f4ce2b8b 100644 --- a/src/generic/armcm_timer.c +++ b/src/generic/armcm_timer.c @@ -68,7 +68,7 @@ udelay(uint32_t usecs) ; } -// On fast cpus, schedule a recurring timer so SysTick doesn't overflow +// Dummy timer to avoid scheduling a SysTick irq greater than 0xffffff static uint_fast8_t timer_wrap_event(struct timer *t) { @@ -82,8 +82,10 @@ static struct timer wrap_timer = { void timer_reset(void) { - if (CONFIG_CLOCK_FREQ > 0xffffff * 10) - sched_add_timer(&wrap_timer); + if (timer_from_us(100000) <= 0xffffff) + // Timer in sched.c already ensures SysTick wont overflow + return; + sched_add_timer(&wrap_timer); } DECL_SHUTDOWN(timer_reset); |