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cpu/stm32/gpio: fix IRQ handler #16272

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Apr 2, 2021
Merged

cpu/stm32/gpio: fix IRQ handler #16272

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7 changes: 5 additions & 2 deletions cpu/stm32/periph/gpio_all.c
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Original file line number Diff line number Diff line change
Expand Up @@ -348,11 +348,14 @@ void isr_exti(void)

uint32_t pending_isr = pending_rising_isr | pending_falling_isr;
#else
/* only generate interrupts against lines which have their IMR set */
uint32_t pending_isr = (EXTI_REG_PR & EXTI_REG_IMR & EXTI_MASK);
/* read all pending interrupts wired to isr_exti */
uint32_t pending_isr = (EXTI_REG_PR & EXTI_MASK);

/* clear by writing a 1 */
EXTI_REG_PR = pending_isr;

/* only generate soft interrupts against lines which have their IMR set */
pending_isr &= EXTI_REG_IMR;
#endif

/* iterate over all set bits */
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