Emit event on power-present toggle (#320)

* Emit event on power-present toggle

* clang-format on changes

* also update battery status on any event

* update comments; remove double battery update

* Fix formatting

* Vibrate shortly on charging event

* debounce charge event

1 files changed, 17 insertions, 5 deletions

diff --git a/src/systemtask/SystemTask.cpp b/src/systemtask/SystemTask.cpp
index 6d695e2c..59660623 100644
--- a/src/systemtask/SystemTask.cpp
+++ b/src/systemtask/SystemTask.cpp
@@ -149,6 +149,16 @@ void SystemTask::Work() {
 
   nrfx_gpiote_in_init(pinTouchIrq, &pinConfig, nrfx_gpiote_evt_handler);
 
+  nrf_gpio_cfg_sense_input(pinPowerPresentIrq, (nrf_gpio_pin_pull_t) NRF_GPIO_PIN_NOPULL, (nrf_gpio_pin_sense_t) GPIO_PIN_CNF_SENSE_Low);
+
+  pinConfig.sense = NRF_GPIOTE_POLARITY_TOGGLE;
+  pinConfig.pull = NRF_GPIO_PIN_NOPULL;
+  pinConfig.is_watcher = false;
+  pinConfig.hi_accuracy = false;
+  pinConfig.skip_gpio_setup = true;
+
+  nrfx_gpiote_in_init(pinPowerPresentIrq, &pinConfig, nrfx_gpiote_evt_handler);
+
   idleTimer = xTimerCreate("idleTimer", pdMS_TO_TICKS(settingsController.GetScreenTimeOut()), pdFALSE, this, IdleTimerCallback);
   xTimerStart(idleTimer, 0);
 
@@ -161,12 +171,9 @@ void SystemTask::Work() {
     uint8_t msg;
     if (xQueueReceive(systemTasksMsgQueue, &msg, 100)) {
 
-      // call the battery controller or use the MSG in DisplayApp to get the battery status ???
-      // it is necessary to validate which is the most efficient
       batteryController.Update();
-      // displayApp->PushMessage(Pinetime::Applications::Display::Messages::UpdateBatteryLevel);
-      //  analyze a more efficient way to do this refreshment
-      //  this and the UpdateMotion(); can be called on a timer to be independent of the main process ???
+      // 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) {
@@ -274,6 +281,11 @@ void SystemTask::Work() {
           // Remember we'll have to reset the counter next time we're awake
           stepCounterMustBeReset = true;
           break;
+        case Messages::OnChargingEvent:
+          motorController.SetDuration(15);
+	  // Battery level is updated on every message - there's no need to do anything
+          break;
+
         default:
           break;
       }