Add heart rate BLE service.

src/CMakeLists.txt

@@ -375,6 +375,7 @@ list(APPEND SOURCE_FILES
         components/ble/BatteryInformationService.cpp
         components/ble/ImmediateAlertService.cpp
         components/ble/ServiceDiscovery.cpp
+        components/ble/HeartRateService.cpp
         components/firmwarevalidator/FirmwareValidator.cpp
         drivers/Cst816s.cpp
         FreeRTOS/port.c
@@ -464,6 +465,7 @@ set(INCLUDE_FILES
         components/ble/ImmediateAlertService.h
         components/ble/ServiceDiscovery.h
         components/ble/BleClient.h
+        components/ble/HeartRateService.h.h
         drivers/Cst816s.h
         FreeRTOS/portmacro.h
         FreeRTOS/portmacro_cmsis.h

src/components/ble/HeartRateService.cpp

@@ -0,0 +1,82 @@
+#include "HeartRateService.h"
+#include "components/heartrate/HeartRateController.h"
+#include "systemtask/SystemTask.h"
+
+using namespace Pinetime::Controllers;
+
+constexpr ble_uuid16_t HeartRateService::heartRateServiceUuid;
+constexpr ble_uuid16_t HeartRateService::heartRateMeasurementUuid;
+
+namespace {
+  int HeartRateServiceServiceCallback(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg) {
+    auto* heartRateService = static_cast<HeartRateService*>(arg);
+    return heartRateService->OnHeartRateRequested(conn_handle, attr_handle, ctxt);
+  }
+}
+
+// TODO Refactoring - remove dependency to SystemTask
+HeartRateService::HeartRateService(Pinetime::System::SystemTask &system, Controllers::HeartRateController& heartRateController) :
+        system{system},
+        heartRateController{heartRateController},
+        characteristicDefinition{
+                {
+                        .uuid = (ble_uuid_t *) &heartRateMeasurementUuid,
+                        .access_cb = HeartRateServiceServiceCallback,
+                        .arg = this,
+                        .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_NOTIFY,
+                        .val_handle = &heartRateMeasurementHandle
+                },
+                {
+                        0
+                }
+        },
+        serviceDefinition{
+                {
+                        /* Device Information Service */
+                        .type = BLE_GATT_SVC_TYPE_PRIMARY,
+                        .uuid = (ble_uuid_t *) &heartRateServiceUuid,
+                        .characteristics = characteristicDefinition
+                },
+                {
+                        0
+                },
+        }{
+  // TODO refactor to prevent this loop dependency (service depends on controller and controller depends on service)
+  heartRateController.SetService(this);
+}
+
+void HeartRateService::Init() {
+  int res = 0;
+  res = ble_gatts_count_cfg(serviceDefinition);
+  ASSERT(res == 0);
+
+  res = ble_gatts_add_svcs(serviceDefinition);
+  ASSERT(res == 0);
+}
+
+int HeartRateService::OnHeartRateRequested(uint16_t connectionHandle, uint16_t attributeHandle,
+                                           ble_gatt_access_ctxt *context) {
+  if(attributeHandle == heartRateMeasurementHandle) {
+    NRF_LOG_INFO("BATTERY : handle = %d", heartRateMeasurementHandle);
+    static uint8_t batteryValue = heartRateController.HeartRate();
+
+    uint8_t buffer[2] = {0, heartRateController.HeartRate()}; // [0] = flags, [1] = hr value
+
+    int res = os_mbuf_append(context->om, buffer, 2);
+    return (res == 0) ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
+  }
+  return 0;
+}
+
+void HeartRateService::OnNewHeartRateValue(uint8_t heartRateValue) {
+  uint8_t buffer[2] = {0, heartRateController.HeartRate()}; // [0] = flags, [1] = hr value
+  auto *om = ble_hs_mbuf_from_flat(buffer, 2);
+
+  uint16_t connectionHandle = system.nimble().connHandle();
+
+  if (connectionHandle == 0 || connectionHandle == BLE_HS_CONN_HANDLE_NONE) {
+    return;
+  }
+
+  ble_gattc_notify_custom(connectionHandle, heartRateMeasurementHandle, om);
+}

src/components/ble/HeartRateService.h

@@ -0,0 +1,44 @@
+#pragma once
+#define min // workaround: nimble's min/max macros conflict with libstdc++
+#define max
+#include <host/ble_gap.h>
+#undef max
+#undef min
+
+namespace Pinetime {
+  namespace System {
+    class SystemTask;
+  }
+  namespace Controllers {
+    class HeartRateController;
+    class HeartRateService {
+      public:
+        HeartRateService(Pinetime::System::SystemTask &system, Controllers::HeartRateController& heartRateController);
+        void Init();
+        int OnHeartRateRequested(uint16_t connectionHandle, uint16_t attributeHandle, ble_gatt_access_ctxt *context);
+        void OnNewHeartRateValue(uint8_t hearRateValue);
+
+    private:
+        Pinetime::System::SystemTask &system;
+        Controllers::HeartRateController& heartRateController;
+        static constexpr uint16_t heartRateServiceId {0x180D};
+        static constexpr uint16_t heartRateMeasurementId {0x2A37};
+
+        static constexpr ble_uuid16_t heartRateServiceUuid {
+                .u {.type = BLE_UUID_TYPE_16},
+                .value = heartRateServiceId
+        };
+
+        static constexpr ble_uuid16_t heartRateMeasurementUuid {
+                .u {.type = BLE_UUID_TYPE_16},
+                .value = heartRateMeasurementId
+        };
+
+        struct ble_gatt_chr_def characteristicDefinition[3];
+        struct ble_gatt_svc_def serviceDefinition[2];
+
+        uint16_t heartRateMeasurementHandle;
+
+    };
+  }
+}

src/components/ble/NimbleController.cpp

@@ -22,7 +22,8 @@ NimbleController::NimbleController(Pinetime::System::SystemTask& systemTask,
         DateTime& dateTimeController,
         Pinetime::Controllers::NotificationManager& notificationManager,
         Controllers::Battery& batteryController,
-        Pinetime::Drivers::SpiNorFlash& spiNorFlash) :
+        Pinetime::Drivers::SpiNorFlash& spiNorFlash,
+        Controllers::HeartRateController& heartRateController) :
         systemTask{systemTask},
         bleController{bleController},
         dateTimeController{dateTimeController},
@@ -36,7 +37,8 @@ NimbleController::NimbleController(Pinetime::System::SystemTask& systemTask,
         musicService{systemTask},
         batteryInformationService{batteryController},
         immediateAlertService{systemTask, notificationManager},
-        serviceDiscovery({&currentTimeClient, &alertNotificationClient}) {
+        serviceDiscovery({&currentTimeClient, &alertNotificationClient}),
+        heartRateService{systemTask, heartRateController} {
 }
 
 int GAPEventCallback(struct ble_gap_event *event, void *arg) {
@@ -58,6 +60,7 @@ void NimbleController::Init() {
   dfuService.Init();
   batteryInformationService.Init();
   immediateAlertService.Init();
+  heartRateService.Init();
   int res;
   res = ble_hs_util_ensure_addr(0);
   ASSERT(res == 0);

src/components/ble/NimbleController.h

@@ -17,6 +17,7 @@
 #include "ImmediateAlertService.h"
 #include "MusicService.h"
 #include "ServiceDiscovery.h"
+#include "HeartRateService.h"
 
 namespace Pinetime {
   namespace Drivers {
@@ -37,7 +38,8 @@ namespace Pinetime {
       public:
         NimbleController(Pinetime::System::SystemTask& systemTask, Pinetime::Controllers::Ble& bleController,
                 DateTime& dateTimeController, Pinetime::Controllers::NotificationManager& notificationManager,
-                Controllers::Battery& batteryController, Pinetime::Drivers::SpiNorFlash& spiNorFlash);
+                Controllers::Battery& batteryController, Pinetime::Drivers::SpiNorFlash& spiNorFlash,
+                Controllers::HeartRateController& heartRateController);
         void Init();
         void StartAdvertising();
         int OnGAPEvent(ble_gap_event *event);
@@ -74,6 +76,7 @@ namespace Pinetime {
         MusicService musicService;
         BatteryInformationService batteryInformationService;
         ImmediateAlertService immediateAlertService;
+        HeartRateService heartRateService;
 
         uint8_t addrType; // 1 = Random, 0 = PUBLIC
         uint16_t connectionHandle = 0;

src/components/heartrate/HeartRateController.cpp

@@ -11,7 +11,10 @@ HeartRateController::HeartRateController(Pinetime::System::SystemTask &systemTas
 
 void HeartRateController::Update(HeartRateController::States newState, uint8_t heartRate) {
   this->state = newState;
-  this->heartRate = heartRate;
+  if(this->heartRate != heartRate) {
+    this->heartRate = heartRate;
+    service->OnNewHeartRateValue(heartRate);
+  }
 }
 
 void HeartRateController::Start() {
@@ -32,3 +35,7 @@ void HeartRateController::SetHeartRateTask(Pinetime::Applications::HeartRateTask
   this->task = task;
 }
 
+void HeartRateController::SetService(Pinetime::Controllers::HeartRateService *service) {
+  this->service = service;
+}
+

src/components/heartrate/HeartRateController.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cstdint>
+#include <components/ble/HeartRateService.h>
 
 namespace Pinetime {
   namespace Applications {
@@ -24,11 +25,14 @@ namespace Pinetime {
       States State() const { return state; }
       uint8_t HeartRate() const { return heartRate; }
 
+      void SetService(Pinetime::Controllers::HeartRateService *service);
+
     private:
       System::SystemTask& systemTask;
       Applications::HeartRateTask* task = nullptr;
       States state = States::Stopped;
       uint8_t heartRate = 0;
+      Pinetime::Controllers::HeartRateService* service = nullptr;
     };
   }
 }

src/systemtask/SystemTask.cpp

@@ -47,8 +47,8 @@ SystemTask::SystemTask(Drivers::SpiMaster &spi, Drivers::St7789 &lcd,
                        heartRateController{*this},
                        bleController{bleController}, dateTimeController{dateTimeController},
                        watchdog{}, watchdogView{watchdog}, notificationManager{notificationManager},
-                       nimbleController(*this, bleController,dateTimeController, notificationManager, batteryController, spiNorFlash),
+                       heartRateSensor{heartRateSensor},
-                       heartRateSensor{heartRateSensor}{
+                       nimbleController(*this, bleController,dateTimeController, notificationManager, batteryController, spiNorFlash, heartRateController) {
   systemTasksMsgQueue = xQueueCreate(10, 1);
 }
 

src/systemtask/SystemTask.h

@@ -74,8 +74,8 @@ namespace Pinetime {
         Pinetime::Drivers::Watchdog watchdog;
         Pinetime::Drivers::WatchdogView watchdogView;
         Pinetime::Controllers::NotificationManager& notificationManager;
-        Pinetime::Controllers::NimbleController nimbleController;
         Pinetime::Drivers::Hrs3300& heartRateSensor;
+        Pinetime::Controllers::NimbleController nimbleController;
 
         static constexpr uint8_t pinSpiSck = 2;
         static constexpr uint8_t pinSpiMosi = 3;