stm32:exti: Add EXTI_TRIGGER_NONE and support it in exti_set_trigger

Allow resetting/clearing exti triggers.
libopencm3 · Apr 20, 2024 · dbc7738 · dbc7738
1 parent bb4c5d7
commit dbc7738
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diff --git a/include/libopencm3/stm32/common/exti_common_all.h b/include/libopencm3/stm32/common/exti_common_all.h
@@ -75,6 +75,7 @@ enum exti_trigger_type {
  EXTI_TRIGGER_RISING,
  EXTI_TRIGGER_FALLING,
  EXTI_TRIGGER_BOTH,
+ EXTI_TRIGGER_NONE,
 };
 
 BEGIN_DECLS

diff --git a/lib/stm32/common/exti_common_all.c b/lib/stm32/common/exti_common_all.c
@@ -56,6 +56,10 @@ void exti_set_trigger(uint32_t extis, enum exti_trigger_type trig)
  EXTI_RTSR |= extis;
  EXTI_FTSR |= extis;
  break;
+ case EXTI_TRIGGER_NONE:
+ EXTI_RTSR &= ~extis;
+ EXTI_FTSR &= ~extis;
+ break;
  }
 }