From 0cef7ce0ebc0ed8d6e9083bf115add8225bb4aff Mon Sep 17 00:00:00 2001
From: Dhinesh Kumar Pitchai <dhineshkumar@mcci.com>
Date: Tue, 9 Apr 2019 01:41:52 +0530
Subject: [PATCH] Fix #132: Configure Sleep mode to
 'StopWithLowPowerRegulator'.

---
 src/lib/stm32/stm32l0/CatenaStm32L0Rtc.cpp    | 44 +++----------------
 src/lib/stm32/stm32l0/CatenaStm32L0_Sleep.cpp |  9 ++--
 2 files changed, 10 insertions(+), 43 deletions(-)

diff --git a/src/lib/stm32/stm32l0/CatenaStm32L0Rtc.cpp b/src/lib/stm32/stm32l0/CatenaStm32L0Rtc.cpp
index 122dbfe..bc492d0 100644
--- a/src/lib/stm32/stm32l0/CatenaStm32L0Rtc.cpp
+++ b/src/lib/stm32/stm32l0/CatenaStm32L0Rtc.cpp
@@ -1,4 +1,4 @@
-/* CatenaStm32L0Rtc.cpp	Fri Mar 08 2019 18:40:03 dhineshkumar */
+/* CatenaStm32L0Rtc.cpp	Wed Jan 03 2018 11:04:33 chwon */
 
 /*
 
@@ -8,10 +8,10 @@ Module:  CatenaStm32L0Rtc.cpp
 	Class CatenaStm32L0Rtc
 
 Version:
-	V0.8.0	Fri Mar 08 2019 18:40:03 dhineshkumar	Edit level 5
+	V0.7.0	Wed Jan 03 2018 11:04:33 chwon	Edit level 4
 
 Copyright notice:
-	This file copyright (C) 2017-2019 by
+	This file copyright (C) 2017 by
 
 		MCCI Corporation
 		3520 Krums Corners Road
@@ -38,9 +38,6 @@ Revision history:
    0.7.0  Wed Jan 03 2018 11:04:33  chwon
 	Need to call HAL_RTCEx_EnableBypassShadow() to support USB.
 
-   0.8.0  Fri Mar 08 2019 18:40:03 dhineshkumar
-	Set and Clear Power interface clock enable bit in Stop mode.
-
 */
 
 #ifdef ARDUINO_ARCH_STM32
@@ -112,7 +109,7 @@ void HAL_RTC_MspInit(
 		__HAL_RCC_RTC_ENABLE();
 		/* USER CODE BEGIN RTC_MspInit 1 */
 		HAL_NVIC_SetPriority(RTC_IRQn, TICK_INT_PRIORITY, 0U);
-		HAL_NVIC_EnableIRQ(RTC_IRQn);
+		HAL_NVIC_EnableIRQ(RTC_IRQn); 
 		/* USER CODE END RTC_MspInit 1 */
 		}
 	}
@@ -124,7 +121,7 @@ void HAL_RTC_MspDeInit(
 	if (hRtc->Instance == RTC)
 		{
 		/* USER CODE BEGIN RTC_MspDeInit 0 */
-		HAL_NVIC_DisableIRQ(RTC_IRQn);
+		HAL_NVIC_DisableIRQ(RTC_IRQn); 
 		/* USER CODE END RTC_MspDeInit 0 */
 		/* Peripheral clock disable */
 		__HAL_RCC_RTC_DISABLE();
@@ -213,13 +210,13 @@ bool CatenaStm32L0Rtc::begin(bool fResetTime)
 			Serial.println("HAL_RTC_SetTime() failed");
 			return false;
 			}
-
+	
 		/* Sunday 1st January 2017 */
 		Date.WeekDay = RTC_WEEKDAY_SUNDAY;
 		Date.Month = RTC_MONTH_JANUARY;
 		Date.Date = 0x1;
 		Date.Year = 0x0;
-
+	
 		if (HAL_RTC_SetDate(
 			&this->m_hRtc,
 			&Date,
@@ -411,10 +408,6 @@ void CatenaStm32L0Rtc::SleepForAlarm(
 		break;
 
 	case SleepMode::StopWithLowPowerRegulator:
-		{
-		/* Set Power interface clock enable bit */
-  		RCC->APB1ENR |= RCC_APB1ENR_PWREN;
-
 		while (! m_Alarm)
 			{
 			++nWakes;
@@ -424,29 +417,6 @@ void CatenaStm32L0Rtc::SleepForAlarm(
 				PWR_SLEEPENTRY_WFI
 				);
 			}
-
-		/* Set Power interface clock enable bit */
-  		RCC->APB1ENR |= RCC_APB1ENR_PWREN;
-
-		if (HAL_RCC_GetHCLKFreq() < 16000000)
-			{
-			/* MSI clock, enable and ready */
-			LL_RCC_MSI_Enable();
-			while (LL_RCC_MSI_IsReady() != 1U)
-				{
-				/* Wait for MSI ready */
-				}
-			}
-		else
-			{
-			/* HSI clock, enable and ready */
-			LL_RCC_HSI_Enable();
-			while (LL_RCC_HSI_IsReady() != 1U)
-				{
-				/* Wait for HSI ready */
-				}
-			}
-		}
 		break;
 
 	case SleepMode::Standby:
diff --git a/src/lib/stm32/stm32l0/CatenaStm32L0_Sleep.cpp b/src/lib/stm32/stm32l0/CatenaStm32L0_Sleep.cpp
index c97efe4..d0b392b 100644
--- a/src/lib/stm32/stm32l0/CatenaStm32L0_Sleep.cpp
+++ b/src/lib/stm32/stm32l0/CatenaStm32L0_Sleep.cpp
@@ -1,4 +1,4 @@
-/* CatenaStm32L0_Sleep.cpp	Fri Mar 08 2019 18:05:26 dhineshkumar */
+/* CatenaStm32L0_Sleep.cpp	Wed Oct 31 2018 10:57:42 chwon */
 
 /*
 
@@ -8,10 +8,10 @@ Module:  CatenaStm32L0_Sleep.cpp
 	Home for CatenaStm32L0::Sleep()
 
 Version:
-	V0.11.1	Fri Mar 08 2019 18:05:26 dhineshkumar	Edit level 2
+	V0.11.0	Wed Oct 31 2018 10:57:42 chwon	Edit level 1
 
 Copyright notice:
-	This file copyright (C) 2018-2019 by
+	This file copyright (C) 2018 by
 
 		MCCI Corporation
 		3520 Krums Corners Road
@@ -29,9 +29,6 @@ Revision history:
    0.11.0  Wed Oct 31 2018 10:57:42  chwon
 	Module created.
 
-   0.11.1  Fri Mar 08 2019 18:05:26 dhineshkumar
-	Call SleepForAlarm with SleepMode StopWithLowPowerRegulator.
-
 */
 
 #ifdef ARDUINO_ARCH_STM32