Enable watchdog, and issue a WDT reset when the button is pushed for more than 7s.

src/CMakeLists.txt

@@ -160,11 +160,10 @@ list(APPEND SOURCE_FILES
   DisplayApp/Screens/Clock.cpp
   DisplayApp/Screens/Message.cpp
   DisplayApp/Screens/Tile.cpp
-#  DisplayApp/Screens/Tab.cpp
   main.cpp
   drivers/St7789.cpp
   drivers/SpiMaster.cpp
-#  Components/Gfx/Gfx.cpp
+  drivers/Watchdog.cpp
   BLE/BleManager.c
   Components/Battery/BatteryController.cpp
   Components/Ble/BleController.cpp
@@ -194,6 +193,7 @@ set(INCLUDE_FILES
 #  DisplayApp/Screens/Tab.h
   drivers/St7789.h
   drivers/SpiMaster.h
+  drivers/Watchdog.h
   BLE/BleManager.h
   Components/Battery/BatteryController.h
   Components/Ble/BleController.h

src/SystemTask/SystemTask.cpp

@@ -29,6 +29,9 @@ void SystemTask::Process(void *instance) {
 }
 
 void SystemTask::Work() {
+  watchdog.Setup(7);
+  watchdog.Start();
+  NRF_LOG_INFO("Last reset reason : %s", Pinetime::Drivers::Watchdog::ResetReasonToString(watchdog.ResetReason()));
   APP_GPIOTE_INIT(2);
   bool erase_bonds=false;
   nrf_sdh_freertos_init(ble_manager_start_advertising, &erase_bonds);
@@ -70,7 +73,7 @@ void SystemTask::Work() {
 
   while(true) {
     uint8_t msg;
-    if (xQueueReceive(systemTaksMsgQueue, &msg, isSleeping?3600000 : 1000)) {
+    if (xQueueReceive(systemTaksMsgQueue, &msg, isSleeping?2500 : 1000)) {
       Messages message = static_cast<Messages >(msg);
       switch(message) {
         case Messages::GoToRunning: isSleeping = false; break;
@@ -83,6 +86,9 @@ void SystemTask::Work() {
     }
     uint32_t systick_counter = nrf_rtc_counter_get(portNRF_RTC_REG);
     dateTimeController.UpdateTime(systick_counter);
+
+    if(!nrf_gpio_pin_read(pinButton))
+      watchdog.Kick();
   }
 }
 

src/SystemTask/SystemTask.h

@@ -7,6 +7,7 @@
 #include <drivers/St7789.h>
 #include <Components/Battery/BatteryController.h>
 #include <DisplayApp/DisplayApp.h>
+#include <drivers/Watchdog.h>
 
 namespace Pinetime {
   namespace System {
@@ -41,6 +42,7 @@ namespace Pinetime {
         Pinetime::Controllers::DateTime& dateTimeController;
         QueueHandle_t systemTaksMsgQueue;
         bool isSleeping = false;
+        Pinetime::Drivers::Watchdog watchdog;
 
 
         static constexpr uint8_t pinSpiSck = 2;

src/drivers/Watchdog.cpp

@@ -0,0 +1,60 @@
+#include <mdk/nrf52.h>
+#include <mdk/nrf52_bitfields.h>
+#include <nrf_soc.h>
+#include "Watchdog.h"
+using namespace Pinetime::Drivers;
+
+
+void Watchdog::Setup(uint8_t timeoutSeconds) {
+  NRF_WDT->CONFIG &= ~(WDT_CONFIG_SLEEP_Msk << WDT_CONFIG_SLEEP_Pos);
+  NRF_WDT->CONFIG |= (WDT_CONFIG_HALT_Run << WDT_CONFIG_SLEEP_Pos);
+
+  NRF_WDT->CONFIG &= ~(WDT_CONFIG_HALT_Msk << WDT_CONFIG_HALT_Pos);
+  NRF_WDT->CONFIG |= (WDT_CONFIG_HALT_Pause << WDT_CONFIG_HALT_Pos);
+
+  /* timeout (s) = (CRV + 1) / 32768 */
+  // JF : 7500 = 7.5s
+  uint32_t crv = (((timeoutSeconds*1000u) << 15u) / 1000) - 1;
+  NRF_WDT->CRV = crv;
+
+  /* Enable reload requests */
+  NRF_WDT->RREN = (WDT_RREN_RR0_Enabled << WDT_RREN_RR0_Pos);
+}
+
+void Watchdog::Start() {
+  NRF_WDT->TASKS_START = 1;
+}
+
+void Watchdog::Kick() {
+  NRF_WDT->RR[0] = WDT_RR_RR_Reload;
+}
+
+Watchdog::ResetReasons Watchdog::ResetReason() {
+  uint32_t resetReason;
+  sd_power_reset_reason_get(&resetReason);
+  sd_power_reset_reason_clr(0xFFFFFFFF);
+  if(resetReason & 0x01) return ResetReasons::ResetPin;
+  if((resetReason >> 1) & 0x01) return ResetReasons::Watchdog;
+  if((resetReason >> 2) & 0x01) return ResetReasons::SoftReset;
+  if((resetReason >> 3) & 0x01) return ResetReasons::CpuLockup;
+  if((resetReason >> 16) & 0x01) return ResetReasons::SystemOff;
+  if((resetReason >> 17) & 0x01) return ResetReasons::LpComp;
+  if((resetReason >> 18) & 0x01) return ResetReasons::DebugInterface;
+  if((resetReason >> 19) & 0x01) return ResetReasons::NFC;
+  return ResetReasons::HardReset;
+}
+
+const char *Watchdog::ResetReasonToString(Watchdog::ResetReasons reason) {
+  switch(reason) {
+    case ResetReasons::ResetPin: return "Reset pin";
+    case ResetReasons::Watchdog: return "Watchdog";
+    case ResetReasons::DebugInterface: return "Debug interface";
+    case ResetReasons::LpComp: return "LPCOMP";
+    case ResetReasons::SystemOff: return "System OFF";
+    case ResetReasons::CpuLockup: return "CPU Lock-up";
+    case ResetReasons::SoftReset: return "Soft reset";
+    case ResetReasons::NFC: return "NFC";
+    case ResetReasons::HardReset: return "Hard reset";
+    default: return "Unknown";
+  }
+}

src/drivers/Watchdog.h

@@ -0,0 +1,17 @@
+#pragma once
+
+namespace Pinetime {
+  namespace Drivers {
+    class Watchdog {
+      public:
+        enum class ResetReasons { ResetPin, Watchdog, SoftReset, CpuLockup, SystemOff, LpComp, DebugInterface, NFC, HardReset };
+        void Setup(uint8_t timeoutSeconds);
+        void Start();
+        void Kick();
+
+        ResetReasons ResetReason();
+        static const char* ResetReasonToString(ResetReasons reason);
+
+    };
+  }
+}

src/libs/lvgl

@@ -1 +1 @@
-Subproject commit 10b9c9b2f5344e7b2f5cc00a19ed86ed56ae9866
+Subproject commit ee95d1c9cf74899585f9165458911f2d54ca7500