Add heart rate BLE service.

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;
+
+    };
+  }
+}