Make battery reading periodic. Add events. Disable pullup

src/components/battery/BatteryController.cpp

@@ -9,10 +9,7 @@ Battery* Battery::instance = nullptr;
 
 Battery::Battery() {
   instance = this;
-}
+  nrf_gpio_cfg_input(chargingPin, static_cast<nrf_gpio_pin_pull_t> GPIO_PIN_CNF_PULL_Disabled);
-
-void Battery::Init() {
-  nrf_gpio_cfg_input(chargingPin, static_cast<nrf_gpio_pin_pull_t> GPIO_PIN_CNF_PULL_Pullup);
 }
 
 void Battery::Update() {
@@ -75,5 +72,11 @@ void Battery::SaadcEventHandler(nrfx_saadc_evt_t const* p_event) {
 
     nrfx_saadc_uninit();
     isReading = false;
+
+    systemTask->PushMessage(System::Messages::BatteryMeasurementDone);
   }
 }
+
+void Battery::Register(Pinetime::System::SystemTask* systemTask) {
+  this->systemTask = systemTask;
+}

src/components/battery/BatteryController.h

@@ -1,8 +1,7 @@
 #pragma once
 #include <cstdint>
 #include <drivers/include/nrfx_saadc.h>
-#include <array>
+#include <systemtask/SystemTask.h>
-#include <numeric>
 
 namespace Pinetime {
   namespace Controllers {
@@ -11,8 +10,8 @@ namespace Pinetime {
     public:
       Battery();
 
-      void Init();
       void Update();
+      void Register(System::SystemTask* systemTask);
 
       uint8_t PercentRemaining() const {
         return percentRemaining;
@@ -49,6 +48,8 @@ namespace Pinetime {
       static void AdcCallbackStatic(nrfx_saadc_evt_t const* event);
 
       bool isReading = false;
+
+      Pinetime::System::SystemTask* systemTask = nullptr;
     };
   }
 }

src/displayapp/DisplayApp.cpp

@@ -194,9 +194,6 @@ void DisplayApp::Refresh() {
         //        clockScreen.SetBleConnectionState(bleController.IsConnected() ? Screens::Clock::BleConnectionStates::Connected :
         //        Screens::Clock::BleConnectionStates::NotConnected);
         break;
-      case Messages::UpdateBatteryLevel:
-        batteryController.Update();
-        break;
       case Messages::NewNotification:
         LoadApp(Apps::NotificationsPreview, DisplayApp::FullRefreshDirections::Down);
         break;

src/displayapp/Messages.h

@@ -7,7 +7,6 @@ namespace Pinetime {
         GoToRunning,
         UpdateDateTime,
         UpdateBleConnection,
-        UpdateBatteryLevel,
         TouchEvent,
         ButtonPushed,
         NewNotification,

src/displayapp/screens/BatteryInfo.cpp

@@ -59,9 +59,6 @@ BatteryInfo::~BatteryInfo() {
 }
 
 void BatteryInfo::UpdateScreen() {
-
-  batteryController.Update();
-
   batteryPercent = batteryController.PercentRemaining();
   batteryVoltage = batteryController.Voltage();
 

src/systemtask/Messages.h

@@ -20,7 +20,9 @@ namespace Pinetime {
         EnableSleeping,
         DisableSleeping,
         OnNewDay,
-        OnChargingEvent
+        OnChargingEvent,
+        MeasureBatteryTimerExpired,
+        BatteryMeasurementDone,
       };
     }
 }

src/systemtask/SystemTask.cpp

@@ -47,6 +47,11 @@ void IdleTimerCallback(TimerHandle_t xTimer) {
   sysTask->OnIdle();
 }
 
+void MeasureBatteryTimerCallback(TimerHandle_t xTimer) {
+  auto* sysTask = static_cast<SystemTask*>(pvTimerGetTimerID(xTimer));
+  sysTask->PushMessage(Pinetime::System::Messages::MeasureBatteryTimerExpired);
+}
+
 SystemTask::SystemTask(Drivers::SpiMaster& spi,
                        Drivers::St7789& lcd,
                        Pinetime::Drivers::SpiNorFlash& spiNorFlash,
@@ -126,7 +131,8 @@ void SystemTask::Work() {
   twiMaster.Init();
   touchPanel.Init();
   dateTimeController.Register(this);
-  batteryController.Init();
+  batteryController.Register(this);
+  batteryController.Update();
   motorController.Init();
   motionSensor.SoftReset();
   timerController.Register(this);
@@ -143,8 +149,6 @@ void SystemTask::Work() {
   displayApp.Register(this);
   displayApp.Start();
 
-  displayApp.PushMessage(Pinetime::Applications::Display::Messages::UpdateBatteryLevel);
-
   heartRateSensor.Init();
   heartRateSensor.Disable();
   heartRateApp.Start();
@@ -187,7 +191,9 @@ void SystemTask::Work() {
 
   idleTimer = xTimerCreate("idleTimer", pdMS_TO_TICKS(2000), pdFALSE, this, IdleTimerCallback);
   dimTimer = xTimerCreate("dimTimer", pdMS_TO_TICKS(settingsController.GetScreenTimeOut() - 2000), pdFALSE, this, DimTimerCallback);
+  measureBatteryTimer = xTimerCreate("measureBattery", batteryMeasurementPeriod, pdTRUE, this, MeasureBatteryTimerCallback);
   xTimerStart(dimTimer, 0);
+  xTimerStart(measureBatteryTimer, portMAX_DELAY);
 
 // Suppress endless loop diagnostic
 #pragma clang diagnostic push
@@ -197,11 +203,6 @@ void SystemTask::Work() {
 
     uint8_t msg;
     if (xQueueReceive(systemTasksMsgQueue, &msg, 100)) {
-
-      batteryController.Update();
-      // the battery does not emit events when changing charge levels, so we piggyback
-      // on any system event to read and update the current values
-
       Messages message = static_cast<Messages>(msg);
       switch (message) {
         case Messages::EnableSleeping:
@@ -232,7 +233,6 @@ void SystemTask::Work() {
           lcd.Wakeup();
 
           displayApp.PushMessage(Pinetime::Applications::Display::Messages::GoToRunning);
-          displayApp.PushMessage(Pinetime::Applications::Display::Messages::UpdateBatteryLevel);
           heartRateApp.PushMessage(Pinetime::Applications::HeartRateTask::Messages::WakeUp);
 
           isSleeping = false;
@@ -326,8 +326,18 @@ void SystemTask::Work() {
           stepCounterMustBeReset = true;
           break;
         case Messages::OnChargingEvent:
+          batteryController.Update();
           motorController.SetDuration(15);
-	  // Battery level is updated on every message - there's no need to do anything
+          break;
+        case Messages::MeasureBatteryTimerExpired:
+          sendBatteryNotification = true;
+          batteryController.Update();
+          break;
+        case Messages::BatteryMeasurementDone:
+          if (sendBatteryNotification) {
+            sendBatteryNotification = false;
+            nimbleController.NotifyBatteryLevel(batteryController.PercentRemaining());
+          }
           break;
 
         default:
@@ -346,11 +356,6 @@ void SystemTask::Work() {
       }
     }
 
-    if (xTaskGetTickCount() - batteryNotificationTick > batteryNotificationPeriod) {
-      nimbleController.NotifyBatteryLevel(batteryController.PercentRemaining());
-      batteryNotificationTick = xTaskGetTickCount();
-    }
-
     monitor.Process();
     uint32_t systick_counter = nrf_rtc_counter_get(portNRF_RTC_REG);
     dateTimeController.UpdateTime(systick_counter);

src/systemtask/SystemTask.h

@@ -131,13 +131,15 @@ namespace Pinetime {
       uint8_t bleDiscoveryTimer = 0;
       TimerHandle_t dimTimer;
       TimerHandle_t idleTimer;
+      TimerHandle_t measureBatteryTimer;
+      bool sendBatteryNotification = false;
       bool doNotGoToSleep = false;
 
       void GoToRunning();
       void UpdateMotion();
       bool stepCounterMustBeReset = false;
-      static constexpr TickType_t batteryNotificationPeriod = 1000 * 60 * 10; // 1 tick ~= 1ms. 1ms * 60 * 10 = 10 minutes
+      static constexpr TickType_t batteryMeasurementPeriod = pdMS_TO_TICKS(10 * 60 * 1000);
-      TickType_t batteryNotificationTick = 0;
+      TickType_t lastBatteryNotificationTime = 0;
 
 #if configUSE_TRACE_FACILITY == 1
       SystemMonitor<FreeRtosMonitor> monitor;