stm32/stm32_it: Fix RTC IRQ handler to handle all EXTI IRQs on F0 MCUs.

dhylands · dpgeorge · commit a270cf280b22 · 2019-02-19T15:17:47.000+11:00
diff --git a/ports/stm32/stm32_it.c b/ports/stm32/stm32_it.c
@@ -509,8 +509,18 @@ void RTC_WKUP_IRQHandler(void) {
 
 void RTC_IRQHandler(void) {
     IRQ_ENTER(RTC_IRQn);
-    RTC->ISR &= ~RTC_ISR_WUTF; // clear wakeup interrupt flag
-    Handle_EXTI_Irq(EXTI_RTC_WAKEUP); // clear EXTI flag and execute optional callback
+    if (RTC->ISR & RTC_ISR_WUTF) {
+        RTC->ISR &= ~RTC_ISR_WUTF; // clear wakeup interrupt flag
+        Handle_EXTI_Irq(EXTI_RTC_WAKEUP); // clear EXTI flag and execute optional callback
+    }
+    if (RTC->ISR & RTC_ISR_ALRAF) {
+        RTC->ISR &= ~RTC_ISR_ALRAF; // clear Alarm A flag
+        Handle_EXTI_Irq(EXTI_RTC_ALARM); // clear EXTI flag and execute optional callback
+    }
+    if (RTC->ISR & RTC_ISR_TSF) {
+        RTC->ISR &= ~RTC_ISR_TSF; // clear timestamp flag
+        Handle_EXTI_Irq(EXTI_RTC_TIMESTAMP); // clear EXTI flag and execute optional callback
+    }
     IRQ_EXIT(RTC_IRQn);
 }
 
