From b5d0480bede50ad39eab6449b0c67f2c096d0639 Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Mon, 20 Jul 2020 10:34:42 +1000
Subject: [PATCH] AP_HAL_ChibiOS: log accumulated power status flags; all flags
 ever set

---
 libraries/AP_HAL_ChibiOS/AnalogIn.cpp | 1 +
 libraries/AP_HAL_ChibiOS/AnalogIn.h   | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/libraries/AP_HAL_ChibiOS/AnalogIn.cpp b/libraries/AP_HAL_ChibiOS/AnalogIn.cpp
index d1096b643e..c657265c3f 100644
--- a/libraries/AP_HAL_ChibiOS/AnalogIn.cpp
+++ b/libraries/AP_HAL_ChibiOS/AnalogIn.cpp
@@ -473,6 +473,7 @@ void AnalogIn::update_power_flags(void)
         // the power status has changed while armed
         flags |= MAV_POWER_STATUS_CHANGED;
     }
+    _accumulated_power_flags |= flags;
     _power_flags = flags;
 }
 #endif // HAL_USE_ADC
diff --git a/libraries/AP_HAL_ChibiOS/AnalogIn.h b/libraries/AP_HAL_ChibiOS/AnalogIn.h
index dbfd570095..437f8bdeee 100644
--- a/libraries/AP_HAL_ChibiOS/AnalogIn.h
+++ b/libraries/AP_HAL_ChibiOS/AnalogIn.h
@@ -61,6 +61,7 @@ public:
     float board_voltage(void) override { return _board_voltage; }
     float servorail_voltage(void) override { return _servorail_voltage; }
     uint16_t power_status_flags(void) override { return _power_flags; }
+    uint16_t accumulated_power_status_flags(void) const override { return _accumulated_power_flags; }
     static void adccallback(ADCDriver *adcp);
 
 private:
@@ -74,6 +75,8 @@ private:
     float _servorail_voltage;
     float _rssi_voltage;
     uint16_t _power_flags;
+    uint16_t _accumulated_power_flags;  // bitmask of all _power_flags ever set
+
     ADCConversionGroup adcgrpcfg;
 
     struct pin_info {