Add clear pending interrupt feature with attachInterruptWithClearPending API

Author: cparata

cores/arduino/WInterrupts.cpp

@@ -87,3 +87,13 @@ void detachInterrupt(uint32_t pin)
   UNUSED(pin);
 #endif
 }
+
+void clearPendingInterrupt(uint32_t pin)
+{
+#if !defined(HAL_EXTI_MODULE_DISABLED)
+  PinName p = digitalPinToPinName(pin);
+  stm32_clear_pending_interrupt(STM_GPIO_PIN(p));
+#else
+  UNUSED(pin);
+#endif
+}

cores/arduino/WInterrupts.h

@@ -33,4 +33,6 @@ void attachInterrupt(uint32_t pin, void (*callback)(void), uint32_t mode);
 
 void detachInterrupt(uint32_t pin);
 
+void clearPendingInterrupt(uint32_t pin);
+
 #endif /* _WIRING_INTERRUPTS_ */

cores/arduino/stm32/interrupt.h

@@ -69,6 +69,7 @@
   /* Exported functions ------------------------------------------------------- */
   void stm32_interrupt_enable(GPIO_TypeDef *port, uint16_t pin, void (*callback)(void), uint32_t mode);
   void stm32_interrupt_disable(GPIO_TypeDef *port, uint16_t pin);
+  void stm32_clear_pending_interrupt(uint16_t pin);
 #endif /* !HAL_EXTI_MODULE_DISABLED */
 
 #endif /* __INTERRUPT_H */

libraries/SrcWrapper/src/stm32/interrupt.cpp

@@ -232,6 +232,18 @@ void stm32_interrupt_disable(GPIO_TypeDef *port, uint16_t pin)
   HAL_NVIC_DisableIRQ(gpio_irq_conf[id].irqnb);
 }
 
+/**
+  * @brief  This function clear the pending interrupts on the selected pin
+  * @param  pin : one of the gpio pin
+  * @retval None
+  */
+void stm32_clear_pending_interrupt(uint16_t pin)
+{
+  uint8_t id = get_pin_id(pin);
+  __HAL_GPIO_EXTI_CLEAR_IT(pin);
+  HAL_NVIC_ClearPendingIRQ(gpio_irq_conf[id].irqnb);
+}
+
 /**
   * @brief This function his called by the HAL if the IRQ is valid
   * @param  GPIO_Pin : one of the gpio pin