From 3f5a507aac9d994388b5da0eb03f9aab71914a58 Mon Sep 17 00:00:00 2001
From: Louis Bertrand <louis@bertrandtech.ca>
Date: Sun, 15 Oct 2023 05:27:30 -0400
Subject: [PATCH 1/2] Backport RTC getVoltLow from M5Unified

---
 src/RTC.cpp | 4 ++++
 src/RTC.h   | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/src/RTC.cpp b/src/RTC.cpp
index ad97c140..69b607dc 100644
--- a/src/RTC.cpp
+++ b/src/RTC.cpp
@@ -24,6 +24,10 @@ uint8_t RTC::ReadReg(uint8_t reg) {
   return Wire1.read();
 }
 
+bool RTC::getVoltLow(void) {
+  return readReg(0x02) & 0x80; // RTCC_VLSEC_MASK
+}
+
 void RTC::GetBm8563Time(void) {
   Wire1.beginTransmission(0x51);
   Wire1.write(0x02);
diff --git a/src/RTC.h b/src/RTC.h
index 23653d7f..19266abf 100644
--- a/src/RTC.h
+++ b/src/RTC.h
@@ -23,6 +23,8 @@ class RTC {
   void begin(void);
   void GetBm8563Time(void);
 
+  bool getVoltLow(void);
+
   int SetTime(RTC_TimeTypeDef* RTC_TimeStruct);
   int SetDate(RTC_DateTypeDef* RTC_DateStruct);
 

From 86267862be5bd3c3f13c80a8787aac1d747ed1e6 Mon Sep 17 00:00:00 2001
From: Tinyu <Tinyu.Zhao@gmail.com>
Date: Fri, 28 Jun 2024 17:17:02 +0800
Subject: [PATCH 2/2] Update RTC.cpp

---
 src/RTC.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/RTC.cpp b/src/RTC.cpp
index 850131fb..b421caac 100644
--- a/src/RTC.cpp
+++ b/src/RTC.cpp
@@ -26,7 +26,7 @@ uint8_t RTC::ReadReg(uint8_t reg) {
 }
 
 bool RTC::getVoltLow(void) {
-  return readReg(0x02) & 0x80; // RTCC_VLSEC_MASK
+    return (readReg(0x02) & 0x80) >> 7;  // RTCC_VLSEC_MASK
 }
 
 void RTC::GetBm8563Time(void) {