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;
-}
-
-void Battery::Init() {
-  nrf_gpio_cfg_input(chargingPin, static_cast<nrf_gpio_pin_pull_t> GPIO_PIN_CNF_PULL_Pullup);
+  nrf_gpio_cfg_input(chargingPin, static_cast<nrf_gpio_pin_pull_t> GPIO_PIN_CNF_PULL_Disabled);
 }
 
 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 <numeric>
+#include <systemtask/SystemTask.h>
 
 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;
     };
   }
 }