Use push button to go to sleep/wake up.

Use a queue to transmit messages between system and display task (sleep & wake up for now).

README.md

@@ -28,6 +28,9 @@ I've tested this project on the actual PineTime hardware.
  * One big font to display the time (hours : minutes)
  * BLE advertising, connection and bonding
  * BLE CTS client (retrieves the time from the connected device if it implements a CTS server)
+ * Push button to go to disable screen (and go to low power mode) / enable screen (and wake-up). **NOTE** : I'm not completely sure the power consumption is optimal, especially in sleep mode. Any help to measure and debug this is welcome.
+ 
+
 
 ## How to build
 

src/DisplayApp/DisplayApp.cpp

@@ -6,6 +6,7 @@
 #include <nrf_font.h>
 #include <hal/nrf_rtc.h>
 #include "Components/Gfx/Gfx.h"
+#include <queue.h>
 
 using namespace Pinetime::Applications;
 
@@ -21,10 +22,7 @@ void DisplayApp::Process(void *instance) {
   app->InitHw();
 
   while (1) {
-
     app->Refresh();
-
-    vTaskDelay(1000);
   }
 }
 
@@ -67,6 +65,56 @@ void DisplayApp::InitHw() {
 }
 
 void DisplayApp::Refresh() {
+  TickType_t queueTimeout;
+  switch(state) {
+    case States::Idle:
+      IdleState();
+      queueTimeout = portMAX_DELAY;
+      break;
+    case States::Running:
+      RunningState();
+      queueTimeout = 1000;
+      break;
+  }
+
+  Messages msg;
+  if(xQueueReceive( msgQueue, &msg, queueTimeout)) {
+    switch(msg) {
+      case Messages::GoToSleep:
+        nrf_gpio_pin_set(23);
+        vTaskDelay(100);
+        nrf_gpio_pin_set(22);
+        vTaskDelay(100);
+        nrf_gpio_pin_set(14);
+        state = States::Idle;
+        break;
+      case Messages::GoToRunning:
+        nrf_gpio_pin_clear(23);
+        nrf_gpio_pin_clear(22);
+        nrf_gpio_pin_clear(14);
+        state = States::Running;
+        break;
+    }
+  }
+}
+
+void DisplayApp::Minutes(uint8_t m) {
+  // TODO yeah, I know, race condition...
+  minutes = m;
+}
+
+void DisplayApp::Hours(uint8_t h) {
+  // TODO yeah, I know, race condition too...
+  hours = h;
+}
+
+void DisplayApp::SetTime(uint8_t minutes, uint8_t hours) {
+  deltaSeconds = nrf_rtc_counter_get(portNRF_RTC_REG) / 1000;
+  this->minutes = minutes;
+  this->hours = hours;
+}
+
+void DisplayApp::RunningState() {
   uint32_t systick_counter = nrf_rtc_counter_get(portNRF_RTC_REG);
 
   auto raw = systick_counter / 1000;
@@ -118,21 +166,24 @@ void DisplayApp::Refresh() {
     gfx->DrawChar(&largeFont, minutesChar[1], &x, 78, 0xffff);
     currentChar[3] = minutesChar[1];
   }
+}
+
+void DisplayApp::IdleState() {
 
 }
 
-void DisplayApp::Minutes(uint8_t m) {
-  // TODO yeah, I know, race condition...
-  minutes = m;
+DisplayApp::DisplayApp() {
+  msgQueue = xQueueCreate(queueSize, itemSize);
 }
 
-void DisplayApp::Hours(uint8_t h) {
-  // TODO yeah, I know, race condition too...
-  hours = h;
-}
+void DisplayApp::PushMessage(DisplayApp::Messages msg) {
+  BaseType_t xHigherPriorityTaskWoken;
+  xHigherPriorityTaskWoken = pdFALSE;
+  xQueueSendFromISR( msgQueue, &msg, &xHigherPriorityTaskWoken );
 
-void DisplayApp::SetTime(uint8_t minutes, uint8_t hours) {
-  deltaSeconds = nrf_rtc_counter_get(portNRF_RTC_REG) / 1000;
-  this->minutes = minutes;
-  this->hours = hours;
+  /* Now the buffer is empty we can switch context if necessary. */
+  if(xHigherPriorityTaskWoken) {
+    /* Actual macro used here is port specific. */
+    // TODO : should I do something here?
+  }
 }

src/DisplayApp/DisplayApp.h

@@ -5,6 +5,7 @@
 #include <drivers/SpiMaster.h>
 #include <Components/Gfx/Gfx.h>
 #include <bits/unique_ptr.h>
+#include <queue.h>
 
 extern const FONT_INFO lCD_70ptFontInfo;
 
@@ -12,6 +13,9 @@ namespace Pinetime {
   namespace Applications {
     class DisplayApp {
       public:
+        enum class States {Idle, Running};
+        enum class Messages : uint8_t {GoToSleep, GoToRunning} ;
+        DisplayApp();
         void Start();
 
         void Minutes(uint8_t m);
@@ -19,6 +23,8 @@ namespace Pinetime {
 
         void SetTime(uint8_t minutes, uint8_t hours);
 
+        void PushMessage(Messages msg);
+
       private:
         TaskHandle_t taskHandle;
         static void Process(void* instance);
@@ -29,13 +35,20 @@ namespace Pinetime {
         const FONT_INFO largeFont {lCD_70ptFontInfo.height, lCD_70ptFontInfo.startChar, lCD_70ptFontInfo.endChar, lCD_70ptFontInfo.spacePixels, lCD_70ptFontInfo.charInfo, lCD_70ptFontInfo.data};
         void Refresh();
 
-
-
         uint8_t seconds = 0;
         uint8_t minutes = 0;
         uint8_t hours = 0;
         char currentChar[4];
         uint32_t deltaSeconds = 0;
+
+        States state = States::Running;
+        void RunningState();
+        void IdleState();
+        QueueHandle_t msgQueue;
+
+        static constexpr uint8_t queueSize = 10;
+        static constexpr uint8_t itemSize = 1;
+
     };
   }
 }

src/main.cpp

@@ -1,6 +1,5 @@
 #include <FreeRTOS.h>
 #include <task.h>
-#include <BlinkApp/BlinkApp.h>
 #include <libraries/bsp/bsp.h>
 #include <legacy/nrf_drv_clock.h>
 #include <libraries/timer/app_timer.h>
@@ -9,6 +8,8 @@
 #include <softdevice/common/nrf_sdh.h>
 
 #include <softdevice/common/nrf_sdh_freertos.h>
+#include <hal/nrf_rtc.h>
+#include <timers.h>
 
 #include "BLE/BleManager.h"
 
@@ -20,9 +21,10 @@ Pinetime::Logging::NrfLogger logger;
 Pinetime::Logging::DummyLogger logger;
 #endif
 
-Pinetime::Applications::BlinkApp blinkApp;
 Pinetime::Applications::DisplayApp displayApp;
 TaskHandle_t systemThread;
+bool isSleeping = false;
+TimerHandle_t debounceTimer;
 
 extern "C" {
   void vApplicationIdleHook() {
@@ -34,18 +36,49 @@ extern "C" {
   }
 }
 
+
+
+void nrfx_gpiote_evt_handler(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
+  BaseType_t xHigherPriorityTaskWoken = pdFALSE;
+  xTimerStartFromISR(debounceTimer, &xHigherPriorityTaskWoken);
+  // TODO should I do something if xHigherPriorityTaskWoken == pdTRUE?
+}
+
+void DebounceTimerCallback(TimerHandle_t xTimer) {
+  xTimerStop(xTimer, 0);
+  if(isSleeping) {
+    displayApp.PushMessage(Pinetime::Applications::DisplayApp::Messages::GoToRunning);
+    isSleeping = false;
+  }
+  else {
+    displayApp.PushMessage(Pinetime::Applications::DisplayApp::Messages::GoToSleep);
+    isSleeping = true;
+  }
+}
+
 void SystemTask(void *) {
   APP_GPIOTE_INIT(2);
-  app_timer_init();
   bool erase_bonds=false;
   nrf_sdh_freertos_init(ble_manager_start_advertising, &erase_bonds);
-//  blinkApp.Start();
   displayApp.Start();
 
-  while (1) {
+  debounceTimer = xTimerCreate ("debounceTimer", 200, pdFALSE, (void *) 0, DebounceTimerCallback);
+
+  nrf_gpio_cfg_sense_input(13, (nrf_gpio_pin_pull_t)GPIO_PIN_CNF_PULL_Pulldown, (nrf_gpio_pin_sense_t)GPIO_PIN_CNF_SENSE_High);
+  nrf_gpio_cfg_output(15);
+  nrf_gpio_pin_set(15);
+
+  nrfx_gpiote_in_config_t pinConfig;
+  pinConfig.skip_gpio_setup = true;
+  pinConfig.hi_accuracy = false;
+  pinConfig.is_watcher = false;
+  pinConfig.sense = (nrf_gpiote_polarity_t)NRF_GPIOTE_POLARITY_HITOLO;
+  pinConfig.pull = (nrf_gpio_pin_pull_t)GPIO_PIN_CNF_PULL_Pulldown;
+
+  nrfx_gpiote_in_init(13, &pinConfig, nrfx_gpiote_evt_handler);
+
   vTaskSuspend(nullptr);
 }
-}
 
 void OnNewTime(uint8_t minutes, uint8_t hours) {
   displayApp.SetTime(minutes, hours);
@@ -55,7 +88,6 @@ int main(void) {
   logger.Init();
   nrf_drv_clock_init();
 
-
   if (pdPASS != xTaskCreate(SystemTask, "MAIN", 256, nullptr, 0, &systemThread))
     APP_ERROR_HANDLER(NRF_ERROR_NO_MEM);
 

src/sdk_config.h

@@ -4839,13 +4839,13 @@
 // <e> NRFX_TIMER_ENABLED - nrfx_timer - TIMER periperal driver
 //==========================================================
 #ifndef NRFX_TIMER_ENABLED
-#define NRFX_TIMER_ENABLED 0
+#define NRFX_TIMER_ENABLED 1
 #endif
 // <q> NRFX_TIMER0_ENABLED  - Enable TIMER0 instance
  
 
 #ifndef NRFX_TIMER0_ENABLED
-#define NRFX_TIMER0_ENABLED 0
+#define NRFX_TIMER0_ENABLED 1
 #endif
 
 // <q> NRFX_TIMER1_ENABLED  - Enable TIMER1 instance