From 8efe5e767ef237004a3494f5411ce9bee1d7a0ed Mon Sep 17 00:00:00 2001
From: Risto <rotorman@users.noreply.github.com>
Date: Mon, 28 Jun 2021 08:46:27 +0200
Subject: [PATCH] RTC bridge fix (#360)

* RTC bridge fix

Merged code by @bsongis from https://github.com/opentx/opentx/pull/8577
---
 radio/src/opentx.cpp | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/radio/src/opentx.cpp b/radio/src/opentx.cpp
index e934bcdcb..46c31d190 100644
--- a/radio/src/opentx.cpp
+++ b/radio/src/opentx.cpp
@@ -694,11 +694,9 @@ void checkMultiLowPower()
 #if defined(STM32)
 static void checkRTCBattery()
 {
-  if (isVBatBridgeEnabled()) {
-    if (getRTCBatteryVoltage() < 200) {
-      ALERT(STR_BATTERY, STR_WARN_RTC_BATTERY_LOW, AU_ERROR);
-    }
-    disableVBatBridge();
+  GET_ADC_IF_MIXER_NOT_RUNNING();
+  if (getRTCBatteryVoltage() < 200) {
+    ALERT(STR_BATTERY, STR_WARN_RTC_BATTERY_LOW, AU_ERROR);
   }
 }
 #endif
@@ -752,8 +750,11 @@ void checkAll()
 #endif
 
 #if defined(STM32)
-  if (!g_eeGeneral.disableRtcWarning)
+  if (isVBatBridgeEnabled() && !g_eeGeneral.disableRtcWarning) {
+    // only done once at board start
     checkRTCBattery();
+  }
+  disableVBatBridge();
 #endif
 
 #if defined(COLORLCD)