From cf54e13565a50c0c61740d7f10e9f8f3ec4ede77 Mon Sep 17 00:00:00 2001
From: "Frederic.Pillon" <frederic.pillon@st.com>
Date: Fri, 11 May 2018 17:24:20 +0200
Subject: [PATCH] [RTC] Make some arguments optional (part 2)

day and mask pointers arguments of RTC_GetAlarm() could be NULL

Fix unused variable warning

Signed-off-by: Frederic.Pillon <frederic.pillon@st.com>
---
 cores/arduino/stm32/rtc.c | 50 ++++++++++++++++++++++++++-------------
 1 file changed, 34 insertions(+), 16 deletions(-)

diff --git a/cores/arduino/stm32/rtc.c b/cores/arduino/stm32/rtc.c
index a4350edf1d..562d09110e 100644
--- a/cores/arduino/stm32/rtc.c
+++ b/cores/arduino/stm32/rtc.c
@@ -443,7 +443,12 @@ void RTC_GetTime(uint8_t *hours, uint8_t *minutes, uint8_t *seconds, uint32_t *s
     if(subSeconds != NULL) {
       *subSeconds = RTC_TimeStruct.SubSeconds;
     }
+#else
+    UNUSED(subSeconds);
 #endif
+#else
+    UNUSED(period);
+    UNUSED(subSeconds);
 #endif /* !STM32F1xx */
   }
 }
@@ -581,19 +586,21 @@ void RTC_StopAlarm(void)
 
 /**
   * @brief Get RTC alarm
-  * @param day: 1-31 (day of the month)
-  * @param hours: 0-12 or 0-23 depends on the hours mode.
+  * @param day: 1-31 day of the month (optional could be NULL)
+  * @param hours: 0-12 or 0-23 depends on the hours mode
   * @param minutes: 0-59
   * @param seconds: 0-59
   * @param subSeconds: 0-999 (optional could be NULL)
   * @param period: AM or PM (optional could be NULL)
+  * @param mask: alarm behavior using alarmMask_t combination (optional could be NULL)
+  *              See AN4579 Table 5 for possible values
   * @retval None
   */
 void RTC_GetAlarm(uint8_t *day, uint8_t *hours, uint8_t *minutes, uint8_t *seconds, uint32_t *subSeconds, hourAM_PM_t *period, uint8_t *mask)
 {
   RTC_AlarmTypeDef RTC_AlarmStructure;
 
-  if((day != NULL) && (hours != NULL) && (minutes != NULL) && (seconds != NULL) && (mask != NULL)) {
+  if((hours != NULL) && (minutes != NULL) && (seconds != NULL)) {
     HAL_RTC_GetAlarm(&RtcHandle, &RTC_AlarmStructure, RTC_ALARM_A, RTC_FORMAT_BIN);
 
     *seconds = RTC_AlarmStructure.AlarmTime.Seconds;
@@ -601,7 +608,9 @@ void RTC_GetAlarm(uint8_t *day, uint8_t *hours, uint8_t *minutes, uint8_t *secon
     *hours = RTC_AlarmStructure.AlarmTime.Hours;
 
 #if !defined(STM32F1xx)
-    *day = RTC_AlarmStructure.AlarmDateWeekDay;
+    if (day != NULL) {
+      *day = RTC_AlarmStructure.AlarmDateWeekDay;
+    }
     if(period != NULL) {
       if(RTC_AlarmStructure.AlarmTime.TimeFormat == RTC_HOURFORMAT12_PM) {
         *period = PM;
@@ -613,20 +622,29 @@ void RTC_GetAlarm(uint8_t *day, uint8_t *hours, uint8_t *minutes, uint8_t *secon
     if(subSeconds != NULL) {
       *subSeconds = RTC_AlarmStructure.AlarmTime.SubSeconds;
     }
+#else
+    UNUSED(subSeconds);
 #endif /* !STM32F2xx && !STM32L1xx || STM32L1_ULPH */
-    *mask = OFF_MSK;
-    if(!(RTC_AlarmStructure.AlarmMask & RTC_ALARMMASK_SECONDS)) {
-      *mask |= SS_MSK;
-    }
-    if(!(RTC_AlarmStructure.AlarmMask & RTC_ALARMMASK_MINUTES)) {
-      *mask |= MM_MSK;
-    }
-    if(!(RTC_AlarmStructure.AlarmMask & RTC_ALARMMASK_HOURS)) {
-      *mask |= HH_MSK;
-    }
-    if(!(RTC_AlarmStructure.AlarmMask & RTC_ALARMMASK_DATEWEEKDAY)) {
-      *mask |= D_MSK;
+    if (mask != NULL) {
+      *mask = OFF_MSK;
+      if(!(RTC_AlarmStructure.AlarmMask & RTC_ALARMMASK_SECONDS)) {
+        *mask |= SS_MSK;
+      }
+      if(!(RTC_AlarmStructure.AlarmMask & RTC_ALARMMASK_MINUTES)) {
+        *mask |= MM_MSK;
+      }
+      if(!(RTC_AlarmStructure.AlarmMask & RTC_ALARMMASK_HOURS)) {
+        *mask |= HH_MSK;
+      }
+      if(!(RTC_AlarmStructure.AlarmMask & RTC_ALARMMASK_DATEWEEKDAY)) {
+        *mask |= D_MSK;
+      }
     }
+#else
+    UNUSED(day);
+    UNUSED(period);
+    UNUSED(subSeconds);
+    UNUSED(mask);
 #endif /* !STM32F1xx */
   }
 }