feat: add STM32U3xx support

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

src/rtc.c

@@ -1192,7 +1192,7 @@ void RTC_Alarm_IRQHandler(void)
     defined(STM32F091xC) || defined(STM32F098xx) || defined(STM32F070xB) || \
     defined(STM32F030xC) || defined(STM32G0xx) || defined(STM32H5xx) || \
     defined(STM32L0xx) || defined(STM32L5xx) || defined(STM32U0xx) ||\
-    defined(STM32U5xx) || defined(STM32WBAxx)
+    defined(STM32U3xx) || defined(STM32U5xx) || defined(STM32WBAxx)
   // In some cases, the same vector is used to manage WakeupTimer,
   // but with a dedicated HAL IRQHandler
   HAL_RTCEx_WakeUpTimerIRQHandler(&RtcHandle);

src/rtc.h

@@ -129,8 +129,8 @@ typedef void(*voidCallbackPtr)(void *);
 #endif /* !STM32F1xx */
 
 #if defined(STM32C0xx) || defined(STM32F0xx) || defined(STM32H5xx) || \
-    defined(STM32L0xx) || defined(STM32L5xx) || defined(STM32U5xx) || \
-    defined(STM32WBAxx)
+    defined(STM32L0xx) || defined(STM32L5xx) || defined(STM32U3xx) || \
+    defined(STM32U3xx) || defined(STM32U5xx) || defined(STM32WBAxx)
 #define RTC_Alarm_IRQn RTC_IRQn
 #define RTC_Alarm_IRQHandler RTC_IRQHandler
 #endif
@@ -142,7 +142,7 @@ typedef void(*voidCallbackPtr)(void *);
 /* mapping the IRQn for the one-second interrupt depending on the soc */
 #if defined(STM32F1xx) || (defined(STM32F0xx) && defined(RTC_CR_WUTE)) || \
     defined(STM32H5xx) || defined(STM32L0xx) || defined(STM32L5xx) || \
-    defined(STM32U5xx) || defined(STM32WBAxx)
+    defined(STM32U3xx) || defined(STM32U5xx) || defined(STM32WBAxx)
 // specific WakeUp interrupt
 #define ONESECOND_IRQn RTC_IRQn
 #elif defined(STM32MP1xx)