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cpu/nrf5x_common/periph_timer: fix spurious IRQs [backport 2022.10] #18974

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merged 1 commit into from
Nov 25, 2022
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cpu/nrf5x_common/periph_timer: fix spurious IRQs [backport 2022.10] #18974

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12 changes: 12 additions & 0 deletions cpu/nrf5x_common/periph/timer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,12 @@ int timer_set_absolute(tim_t tim, int chan, unsigned int value)

ctx[tim].flags |= (1 << chan);
dev(tim)->CC[chan] = value;

/* clear spurious IRQs */
dev(tim)->EVENTS_COMPARE[chan] = 0;
(void)dev(tim)->EVENTS_COMPARE[chan];

/* enable IRQ */
dev(tim)->INTENSET = (TIMER_INTENSET_COMPARE0_Msk << chan);

return 0;
Expand All @@ -126,6 +132,12 @@ int timer_set_periodic(tim_t tim, int chan, unsigned int value, uint8_t flags)
if (flags & TIM_FLAG_RESET_ON_SET) {
dev(tim)->TASKS_CLEAR = 1;
}

/* clear spurious IRQs */
dev(tim)->EVENTS_COMPARE[chan] = 0;
(void)dev(tim)->EVENTS_COMPARE[chan];

/* enable IRQ */
dev(tim)->INTENSET = (TIMER_INTENSET_COMPARE0_Msk << chan);

/* re-start timer */
Expand Down