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irq: Support sleeping when mcu is idle
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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parent
969485c754
commit
118fd21cb8
13 changed files with 101 additions and 10 deletions
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@ -8,6 +8,7 @@
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#include "board/irq.h" // irq_disable
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#include "board/misc.h" // timer_from_us
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#include "board/timer_irq.h" // timer_dispatch_many
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#include "basecmd.h" // stats_note_sleep
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#include "command.h" // shutdown
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#include "sched.h" // sched_timer_kick
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@ -85,9 +86,23 @@ timer_dispatch_many(void)
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void
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timer_task(void)
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{
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static uint32_t last_timer;
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uint32_t lst = last_timer;
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irq_disable();
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timer_repeat_until = timer_read_time() + TIMER_IDLE_REPEAT_TICKS;
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uint32_t next = timer_get_next(), cur = timer_read_time();
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if (lst != next) {
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timer_repeat_until = cur + TIMER_IDLE_REPEAT_TICKS;
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irq_enable();
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last_timer = next;
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return;
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}
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// Sleep the processor
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irq_wait();
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uint32_t post_sleep = timer_read_time();
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timer_repeat_until = post_sleep + TIMER_IDLE_REPEAT_TICKS;
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irq_enable();
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stats_note_sleep(post_sleep - cur);
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}
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DECL_TASK(timer_task);
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