Continuous time updates

2 files changed, 39 insertions, 20 deletions

diff --git a/src/components/datetime/DateTimeController.cpp b/src/components/datetime/DateTimeController.cpp
index f0ccb5e5..39bba15f 100644
--- a/src/components/datetime/DateTimeController.cpp
+++ b/src/components/datetime/DateTimeController.cpp
@@ -1,6 +1,7 @@
 #include "components/datetime/DateTimeController.h"
 #include <libraries/log/nrf_log.h>
 #include <systemtask/SystemTask.h>
+#include <hal/nrf_rtc.h>
 
 using namespace Pinetime::Controllers;
 
@@ -12,11 +13,16 @@ namespace {
 }
 
 DateTime::DateTime(Controllers::Settings& settingsController) : settingsController {settingsController} {
+  mutex = xSemaphoreCreateMutex();
+  ASSERT(mutex != nullptr);
+  xSemaphoreGive(mutex);
 }
 
 void DateTime::SetCurrentTime(std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> t) {
+  xSemaphoreTake(mutex, portMAX_DELAY);
   this->currentDateTime = t;
-  UpdateTime(previousSystickCounter); // Update internal state without updating the time
+  UpdateTime(previousSystickCounter, true); // Update internal state without updating the time
+  xSemaphoreGive(mutex);
 }
 
 void DateTime::SetTime(uint16_t year, uint8_t month, uint8_t day, uint8_t hour, uint8_t minute, uint8_t second) {
@@ -29,13 +35,15 @@ void DateTime::SetTime(uint16_t year, uint8_t month, uint8_t day, uint8_t hour,
     /* .tm_year = */ year - 1900,
   };
 
-  tm.tm_isdst = -1; // Use DST value from local time zone
-  currentDateTime = std::chrono::system_clock::from_time_t(std::mktime(&tm));
-
   NRF_LOG_INFO("%d %d %d ", day, month, year);
   NRF_LOG_INFO("%d %d %d ", hour, minute, second);
 
-  UpdateTime(previousSystickCounter);
+  tm.tm_isdst = -1; // Use DST value from local time zone
+
+  xSemaphoreTake(mutex, portMAX_DELAY);
+  currentDateTime = std::chrono::system_clock::from_time_t(std::mktime(&tm));
+  UpdateTime(previousSystickCounter, true);
+  xSemaphoreGive(mutex);
 
   systemTask->PushMessage(System::Messages::OnNewTime);
 }
@@ -45,25 +53,34 @@ void DateTime::SetTimeZone(int8_t timezone, int8_t dst) {
   dstOffset = dst;
 }
 
-void DateTime::UpdateTime(uint32_t systickCounter) {
+std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> DateTime::CurrentDateTime() {
+  xSemaphoreTake(mutex, portMAX_DELAY);
+  UpdateTime(nrf_rtc_counter_get(portNRF_RTC_REG), false);
+  xSemaphoreGive(mutex);
+  return currentDateTime;
+}
+
+void DateTime::UpdateTime(uint32_t systickCounter, bool forceUpdate) {
   // Handle systick counter overflow
   uint32_t systickDelta = 0;
   if (systickCounter < previousSystickCounter) {
-    systickDelta = 0xffffff - previousSystickCounter;
+    systickDelta = static_cast<uint32_t>(portNRF_RTC_MAXTICKS) - previousSystickCounter;
     systickDelta += systickCounter + 1;
   } else {
     systickDelta = systickCounter - previousSystickCounter;
   }
 
-  /*
-   * 1000 ms = 1024 ticks
-   */
-  auto correctedDelta = systickDelta / 1024;
-  auto rest = systickDelta % 1024;
+  auto correctedDelta = systickDelta / configTICK_RATE_HZ;
+  // If a second hasn't passed, there is nothing to do
+  // If the time has been changed, set forceUpdate to trigger internal state updates
+  if (correctedDelta == 0 && !forceUpdate) {
+    return;
+  }
+  auto rest = systickDelta % configTICK_RATE_HZ;
   if (systickCounter >= rest) {
     previousSystickCounter = systickCounter - rest;
   } else {
-    previousSystickCounter = 0xffffff - (rest - systickCounter);
+    previousSystickCounter = static_cast<uint32_t>(portNRF_RTC_MAXTICKS) - (rest - systickCounter - 1);
   }
 
   currentDateTime += std::chrono::seconds(correctedDelta);
diff --git a/src/components/datetime/DateTimeController.h b/src/components/datetime/DateTimeController.h
index f719df7d..5a453f20 100644
--- a/src/components/datetime/DateTimeController.h
+++ b/src/components/datetime/DateTimeController.h
@@ -5,6 +5,8 @@
 #include <ctime>
 #include <string>
 #include "components/settings/Settings.h"
+#include <FreeRTOS.h>
+#include <semphr.h>
 
 namespace Pinetime {
   namespace System {
@@ -45,8 +47,6 @@ namespace Pinetime {
        */
       void SetTimeZone(int8_t timezone, int8_t dst);
 
-      void UpdateTime(uint32_t systickCounter);
-
       uint16_t Year() const {
         return 1900 + localTime.tm_year;
       }
@@ -124,12 +124,10 @@ namespace Pinetime {
       static const char* MonthShortToStringLow(Months month);
       static const char* DayOfWeekShortToStringLow(Days day);
 
-      std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> CurrentDateTime() const {
-        return currentDateTime;
-      }
+      std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> CurrentDateTime();
 
-      std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> UTCDateTime() const {
-        return currentDateTime - std::chrono::seconds((tzOffset + dstOffset) * 15 * 60);
+      std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> UTCDateTime() {
+        return CurrentDateTime() - std::chrono::seconds((tzOffset + dstOffset) * 15 * 60);
       }
 
       std::chrono::seconds Uptime() const {
@@ -141,10 +139,14 @@ namespace Pinetime {
       std::string FormattedTime();
 
     private:
+      void UpdateTime(uint32_t systickCounter, bool forceUpdate);
+
       std::tm localTime;
       int8_t tzOffset = 0;
       int8_t dstOffset = 0;
 
+      SemaphoreHandle_t mutex = nullptr;
+
       uint32_t previousSystickCounter = 0;
       std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> currentDateTime;
       std::chrono::seconds uptime {0};