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Merge pull request #20926 from Enoch247/fix-stm32-periph-timer-spurious-irq

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cpu/stm32/periph/timer: prevent spurious IRQs
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benpicco 2024-11-20 16:24:49 +00:00 committed by GitHub
commit 1938002526
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1 changed files with 12 additions and 5 deletions
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17
cpu/stm32/periph/timer.c
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@ -50,7 +50,6 @@ static unsigned channel_numof(tim_t tim)
return TIMER_CHANNEL_NUMOF;
}
#ifdef MODULE_PERIPH_TIMER_PERIODIC
/**
@ -195,11 +194,13 @@ int timer_set(tim_t tim, int channel, unsigned int timeout)
}
#endif
/* clear spurious IRQs */
dev(tim)->SR &= ~(TIM_SR_CC1IF << channel);
TIM_CHAN(tim, channel) = value;
/* clear spurious IRQs
* note: This might also clear the IRQ just set, but that is handled below
* anyway. */
dev(tim)->SR &= ~(TIM_SR_CC1IF << channel);
/* enable IRQ */
dev(tim)->DIER |= (TIM_DIER_CC1IE << channel);
@ -236,7 +237,7 @@ int timer_set_periodic(tim_t tim, int channel, unsigned int value, uint8_t flags
dev(tim)->CNT = 0;
/* wait for the interrupt & clear it */
while(dev(tim)->SR == 0) {}
while (dev(tim)->SR == 0) {}
dev(tim)->SR = 0;
}
@ -264,7 +265,13 @@ int timer_clear(tim_t tim, int channel)
}
unsigned irqstate = irq_disable();
/* disable IRQ */
dev(tim)->DIER &= ~(TIM_DIER_CC1IE << channel);
/* clear spurious IRQs */
dev(tim)->SR &= ~(TIM_SR_CC1IF << channel);
irq_restore(irqstate);
#ifdef MODULE_PERIPH_TIMER_PERIODIC