Add MotionService : expose step count and RAW X/Y/Z values to the host.

1 files changed, 124 insertions, 0 deletions

diff --git a/src/components/ble/MotionService.cpp b/src/components/ble/MotionService.cpp
new file mode 100644
index 00000000..2bb5289c
--- /dev/null
+++ b/src/components/ble/MotionService.cpp
@@ -0,0 +1,124 @@
+#include "MotionService.h"
+#include "components/motion//MotionController.h"
+#include "systemtask/SystemTask.h"
+
+using namespace Pinetime::Controllers;
+
+namespace {
+  // 0002yyxx-78fc-48fe-8e23-433b3a1942d0
+  constexpr ble_uuid128_t CharUuid(uint8_t x, uint8_t y) {
+    return ble_uuid128_t{
+      .u = {.type = BLE_UUID_TYPE_128},
+      .value =  { 0xd0, 0x42, 0x19, 0x3a, 0x3b, 0x43, 0x23, 0x8e, 0xfe, 0x48, 0xfc, 0x78, x, y, 0x02, 0x00 }
+    };
+  }
+
+  // 00020000-78fc-48fe-8e23-433b3a1942d0
+  constexpr ble_uuid128_t BaseUuid() {
+    return CharUuid(0x00, 0x00);
+  }
+
+  constexpr ble_uuid128_t motionServiceUuid {BaseUuid()};
+  constexpr ble_uuid128_t stepCountCharUuid {CharUuid(0x01, 0x00)};
+  constexpr ble_uuid128_t motionValuesCharUuid {CharUuid(0x02, 0x00)};
+
+  int MotionServiceCallback(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt* ctxt, void* arg) {
+    auto* motionService = static_cast<MotionService*>(arg);
+    return motionService->OnStepCountRequested(conn_handle, attr_handle, ctxt);
+  }
+}
+
+// TODO Refactoring - remove dependency to SystemTask
+MotionService::MotionService(Pinetime::System::SystemTask& system, Controllers::MotionController& motionController)
+  : system {system},
+    motionController {motionController},
+    characteristicDefinition {{.uuid = &stepCountCharUuid.u,
+                               .access_cb = MotionServiceCallback,
+                               .arg = this,
+                               .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_NOTIFY,
+                               .val_handle = &stepCountHandle},
+                              {.uuid = &motionValuesCharUuid.u,
+                               .access_cb = MotionServiceCallback,
+                               .arg = this,
+                               .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_NOTIFY,
+                               .val_handle = &motionValuesHandle},
+                              {0}},
+    serviceDefinition {
+      {
+       .type = BLE_GATT_SVC_TYPE_PRIMARY,
+       .uuid = &motionServiceUuid.u,
+       .characteristics = characteristicDefinition
+      },
+      {0},
+    } {
+  // TODO refactor to prevent this loop dependency (service depends on controller and controller depends on service)
+  motionController.SetService(this);
+}
+
+void MotionService::Init() {
+  int res = 0;
+  res = ble_gatts_count_cfg(serviceDefinition);
+  ASSERT(res == 0);
+
+  res = ble_gatts_add_svcs(serviceDefinition);
+  ASSERT(res == 0);
+}
+
+int MotionService::OnStepCountRequested(uint16_t connectionHandle, uint16_t attributeHandle, ble_gatt_access_ctxt* context) {
+  if (attributeHandle == stepCountHandle) {
+    NRF_LOG_INFO("Motion-stepcount : handle = %d", stepCountHandle);
+    uint32_t buffer = motionController.NbSteps();
+
+    int res = os_mbuf_append(context->om, &buffer, 4);
+    return (res == 0) ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
+  } else if(attributeHandle == motionValuesHandle) {
+    int16_t buffer[3] = { motionController.X(), motionController.Y(), motionController.Z() };
+
+    int res = os_mbuf_append(context->om, buffer, 3 * sizeof(int16_t));
+    return (res == 0) ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
+  }
+  return 0;
+}
+
+void MotionService::OnNewStepCountValue(uint8_t stepCount) {
+  if(!stepCountNoficationEnabled) return;
+
+  uint32_t buffer = stepCount;
+  auto* om = ble_hs_mbuf_from_flat(&buffer, 4);
+
+  uint16_t connectionHandle = system.nimble().connHandle();
+
+  if (connectionHandle == 0 || connectionHandle == BLE_HS_CONN_HANDLE_NONE) {
+    return;
+  }
+
+  ble_gattc_notify_custom(connectionHandle, stepCountHandle, om);
+}
+void MotionService::OnNewMotionValues(int16_t x, int16_t y, int16_t z) {
+  if(!motionValuesNoficationEnabled) return;
+
+  int16_t buffer[3] = { motionController.X(), motionController.Y(), motionController.Z() };
+  auto* om = ble_hs_mbuf_from_flat(buffer, 3 * sizeof(int16_t));
+
+  uint16_t connectionHandle = system.nimble().connHandle();
+
+  if (connectionHandle == 0 || connectionHandle == BLE_HS_CONN_HANDLE_NONE) {
+    return;
+  }
+
+  ble_gattc_notify_custom(connectionHandle, motionValuesHandle, om);
+}
+
+void MotionService::SubscribeNotification(uint16_t connectionHandle, uint16_t attributeHandle) {
+  if(attributeHandle == stepCountHandle)
+    stepCountNoficationEnabled = true;
+  else if(attributeHandle == motionValuesHandle)
+    motionValuesNoficationEnabled = true;
+}
+
+void MotionService::UnsubscribeNotification(uint16_t connectionHandle, uint16_t attributeHandle) {
+  if(attributeHandle == stepCountHandle)
+    stepCountNoficationEnabled = false;
+  else if(attributeHandle == motionValuesHandle)
+    motionValuesNoficationEnabled = false;
+}