stm32RTC change the binary Mode in case the RTC is already init

RTC is already initialized, but RTC BIN mode must be changed
Change the RTC_BinaryConf function to update the RTC ICSR
register on BIN[] and BCDU[] bit-field

Signed-off-by: Francois RAMU <frq09495@lmecxd0404.lme.st.com>

src/rtc.c

@@ -93,6 +93,7 @@ static void RTC_computePrediv(uint32_t *asynch, uint32_t *synch);
 #endif /* !STM32F1xx */
 #if defined(RTC_BINARY_NONE)
 static void RTC_BinaryConf(binaryMode_t mode);
+static void RTC_SetBinaryConf(void);
 #endif
 
 static inline int _log2(int x)
@@ -383,6 +384,34 @@ static void RTC_BinaryConf(binaryMode_t mode)
  }
  }
 }
+
+/*
+* Function to check if the RTC ICSR register must be updated with new bit
+* field BIN and BCDU. To be called just after the RTC_SetBinaryConf
+* Map the LL RTC bin mode to the corresponding RtcHandle.Init.BinMode values
+* assuming the LL_RTC_BINARY_xxx is identical to RTC_BINARY_xxx (RTC_ICSR_BIN_xxx)
+* Idem for the LL_RTC_BINARY_MIX_BCDU_n and RTC_BINARY_MIX_BCDU_n
+*/
+#if (RTC_BINARY_MIX != LL_RTC_BINARY_MIX)
+#error "RTC_BINARY_MIX and LL_RTC_BINARY_MIX do not match"
+#endif
+#if (RTC_BINARY_MIX_BCDU_7 != LL_RTC_BINARY_MIX_BCDU_7)
+#error "RTC_BINARY_MIX_BCDU_n and LL_RTC_BINARY_MIX_BCDU_n do not match"
+#endif
+static void RTC_SetBinaryConf(void)
+{
+ if (LL_RTC_GetBinaryMode(RtcHandle.Instance) != RtcHandle.Init.BinMode) {
+ LL_RTC_DisableWriteProtection(RtcHandle.Instance);
+ LL_RTC_EnableInitMode(RtcHandle.Instance);
+
+ LL_RTC_SetBinaryMode(RtcHandle.Instance, RtcHandle.Init.BinMode);
+ if (RtcHandle.Init.BinMode == RTC_BINARY_MIX) {
+ LL_RTC_SetBinMixBCDU(RtcHandle.Instance, RtcHandle.Init.BinMixBcdU);
+ }
+ LL_RTC_ExitInitMode(RtcHandle.Instance);
+ LL_RTC_EnableWriteProtection(RtcHandle.Instance);
+ }
+}
 #endif /* RTC_BINARY_NONE */
 
 /**
@@ -462,6 +491,10 @@ bool RTC_init(hourFormat_t format, binaryMode_t mode, sourceClock_t source, bool
  RTC_initClock(source);
  RTC_getPrediv(&(RtcHandle.Init.AsynchPrediv), &(RtcHandle.Init.SynchPrediv));
 #if defined(RTC_BINARY_NONE)
+ /*
+ * If RTC BIN mode changed, calling the HAL_RTC_Init will
+ * force the update of the BIN register in the RTC_ICSR
+ */
  RTC_BinaryConf(mode);
 #endif /* RTC_BINARY_NONE */
 #endif // STM32F1xx
@@ -526,11 +559,11 @@ bool RTC_init(hourFormat_t format, binaryMode_t mode, sourceClock_t source, bool
 #else
  RTC_getPrediv(&(RtcHandle.Init.AsynchPrediv), &(RtcHandle.Init.SynchPrediv));
 #endif
+#if defined(RTC_BINARY_NONE)
  /*
- * TODO: RTC is already initialized, but RTC BIN mode is changed
+ * If RTC BIN mode changed, calling the HAL_RTC_Init will
  * force the update of the BIN register in the RTC_ICSR
  */
-#if defined(RTC_BINARY_NONE)
  RTC_BinaryConf(mode);
 #endif /* RTC_BINARY_NONE */
  HAL_RTC_Init(&RtcHandle);
@@ -557,6 +590,13 @@ bool RTC_init(hourFormat_t format, binaryMode_t mode, sourceClock_t source, bool
 #endif
 #if defined(RTC_BINARY_NONE)
  RTC_BinaryConf(mode);
+ /*
+ * RTC is already initialized, but RTC BIN mode is changed :
+ * force the update of the BIN register and BCDu in the RTC_ICSR
+ * by the RTC_SetBinaryConf function
+ */
+ RTC_SetBinaryConf();
+
 #endif /* RTC_BINARY_NONE */
 #if defined(STM32F1xx)
  memcpy(&RtcHandle.DateToUpdate, &BackupDate, 4);