nochanges
Dependents: BLE_Acceleration_Statejudging
Fork of nRF51822 by
nRF51GattServer.cpp
- Committer:
- Rohit Grover
- Date:
- 2014-05-28
- Revision:
- 7:dd6465921aaa
- Parent:
- 6:bbb4357dc135
- Child:
- 8:2214f1df6a6a
File content as of revision 7:dd6465921aaa:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "nRF51GattServer.h" #include "mbed.h" #include "common/common.h" #include "btle/custom/custom_helper.h" #include "nRF51Gap.h" /** * The nRF transport has its own 3-byte representation of a UUID. If the user- * specified UUID is 128-bits wide, then the UUID base needs to be added to the * soft-device and converted to a 3-byte handle before being used further. This * function is responsible for this translation of user-specified UUIDs into * nRF's representation. * * @param[in] uuid * user-specified UUID * @return nRF * 3-byte UUID (containing a type and 16-bit UUID) representation * to be used with SVC calls. */ static ble_uuid_t custom_convert_to_transport_uuid(const uint16_t uuid) { ble_uuid_t transportUUID = { /* presently we only deal with 16-bit uuids. */ .type = BLE_UUID_TYPE_BLE, .uuid = uuid }; return transportUUID; } /**************************************************************************/ /*! @brief Adds a new service to the GATT table on the peripheral @returns ble_error_t @retval BLE_ERROR_NONE Everything executed properly @section EXAMPLE @code @endcode */ /**************************************************************************/ ble_error_t nRF51GattServer::addService(GattService & service) { /* ToDo: Make sure we don't overflow the array, etc. */ /* ToDo: Make sure this service UUID doesn't already exist (?) */ /* ToDo: Basic validation */ /* Add the service to the nRF51 */ ble_uuid_t uuid; if (service.primaryServiceID.type == UUID::UUID_TYPE_SHORT) { /* 16-bit BLE UUID */ uuid.type = BLE_UUID_TYPE_BLE; } else { /* 128-bit Custom UUID */ uuid.type = custom_add_uuid_base( service.primaryServiceID.base ); } uuid.uuid = service.primaryServiceID.value; ASSERT( ERROR_NONE == sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &uuid, &service.handle), BLE_ERROR_PARAM_OUT_OF_RANGE ); /* Add characteristics to the service */ for (uint8_t i = 0; i < service.characteristicCount; i++) { GattCharacteristic *p_char = service.characteristics[i]; uuid = custom_convert_to_transport_uuid(p_char->uuid); uuid.uuid = p_char->uuid; ASSERT ( ERROR_NONE == custom_add_in_characteristic(service.handle, &uuid, p_char->properties, NULL, p_char->lenMin, p_char->lenMax, &nrfCharacteristicHandles[ characteristicCount]), BLE_ERROR_PARAM_OUT_OF_RANGE ); /* Update the characteristic handle */ p_char->handle = characteristicCount; p_characteristics[characteristicCount++] = p_char; } serviceCount++; return BLE_ERROR_NONE; } /**************************************************************************/ /*! @brief Reads the value of a characteristic, based on the service and characteristic index fields @param[in] charHandle The handle of the GattCharacteristic to read from @param[in] buffer Buffer to hold the the characteristic's value (raw byte array in LSB format) @param[in] len The number of bytes read into the buffer @returns ble_error_t @retval BLE_ERROR_NONE Everything executed properly @section EXAMPLE @code @endcode */ /**************************************************************************/ ble_error_t nRF51GattServer::readValue(uint16_t charHandle, uint8_t buffer[], uint16_t len) { ASSERT( ERROR_NONE == sd_ble_gatts_value_get(nrfCharacteristicHandles[charHandle]. value_handle, 0, &len, buffer), BLE_ERROR_PARAM_OUT_OF_RANGE); return BLE_ERROR_NONE; } /**************************************************************************/ /*! @brief Updates the value of a characteristic, based on the service and characteristic index fields @param[in] charHandle The handle of the GattCharacteristic to write to @param[in] buffer Data to use when updating the characteristic's value (raw byte array in LSB format) @param[in] len The number of bytes in buffer @returns ble_error_t @retval BLE_ERROR_NONE Everything executed properly @section EXAMPLE @code @endcode */ /**************************************************************************/ ble_error_t nRF51GattServer::updateValue(uint16_t charHandle, uint8_t buffer[], uint16_t len, bool localOnly) { uint16_t gapConnectionHandle = nRF51Gap::getInstance().getConnectionHandle(); if (localOnly) { /* Only update locally regardless of notify/indicate */ ASSERT_INT( ERROR_NONE, sd_ble_gatts_value_set(nrfCharacteristicHandles[charHandle]. value_handle, 0, &len, buffer), BLE_ERROR_PARAM_OUT_OF_RANGE ); } if ((p_characteristics[charHandle]->properties & (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)) && (gapConnectionHandle != BLE_CONN_HANDLE_INVALID)) { /* HVX update for the characteristic value */ ble_gatts_hvx_params_t hvx_params; hvx_params.handle = nrfCharacteristicHandles[charHandle].value_handle; hvx_params.type = (p_characteristics[charHandle]->properties & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) ? BLE_GATT_HVX_NOTIFICATION : BLE_GATT_HVX_INDICATION; hvx_params.offset = 0; hvx_params.p_data = buffer; hvx_params.p_len = &len; error_t error = (error_t) sd_ble_gatts_hvx(gapConnectionHandle, &hvx_params); /* ERROR_INVALID_STATE, ERROR_BUSY, ERROR_GATTS_SYS_ATTR_MISSING and *ERROR_NO_TX_BUFFERS the ATT table has been updated. */ if ((error != ERROR_NONE) && (error != ERROR_INVALID_STATE) && (error != ERROR_BLE_NO_TX_BUFFERS) && (error != ERROR_BUSY) && (error != ERROR_BLEGATTS_SYS_ATTR_MISSING)) { ASSERT_INT( ERROR_NONE, sd_ble_gatts_value_set(nrfCharacteristicHandles[ charHandle]. value_handle, 0, &len, buffer), BLE_ERROR_PARAM_OUT_OF_RANGE ); } } else { ASSERT_INT( ERROR_NONE, sd_ble_gatts_value_set(nrfCharacteristicHandles[charHandle]. value_handle, 0, &len, buffer), BLE_ERROR_PARAM_OUT_OF_RANGE ); } return BLE_ERROR_NONE; } /**************************************************************************/ /*! @brief Callback handler for events getting pushed up from the SD */ /**************************************************************************/ void nRF51GattServer::hwCallback(ble_evt_t *p_ble_evt) { uint16_t handle_value; GattServerEvents::gattEvent_t event; switch (p_ble_evt->header.evt_id) { case BLE_GATTS_EVT_WRITE: /* There are 2 use case here: Values being updated & CCCD *(indicate/notify) enabled */ /* 1.) Handle CCCD changes */ handle_value = p_ble_evt->evt.gatts_evt.params.write.handle; for (uint8_t i = 0; i<characteristicCount; i++) { if ((p_characteristics[i]->properties & (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)) && (nrfCharacteristicHandles[i].cccd_handle == handle_value)) { uint16_t cccd_value = (p_ble_evt->evt.gatts_evt.params.write.data[1] << 8) | p_ble_evt->evt.gatts_evt.params.write.data[0]; /* * Little Endian but M0 may * be mis-aligned */ if (((p_characteristics[i]->properties & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE) && (cccd_value & BLE_GATT_HVX_INDICATION)) || ((p_characteristics[i]->properties & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) && (cccd_value & BLE_GATT_HVX_NOTIFICATION))) { event = GattServerEvents::GATT_EVENT_UPDATES_ENABLED; } else { event = GattServerEvents::GATT_EVENT_UPDATES_DISABLED; } handleEvent(event, i); return; } } /* 2.) Changes to the characteristic value will be handled with other *events below */ event = GattServerEvents::GATT_EVENT_DATA_WRITTEN; break; case BLE_GATTS_EVT_HVC: /* Indication confirmation received */ event = GattServerEvents::GATT_EVENT_CONFIRMATION_RECEIVED; handle_value = p_ble_evt->evt.gatts_evt.params.hvc.handle; break; default: return; } /* Find index (charHandle) in the pool */ for (uint8_t i = 0; i<characteristicCount; i++) { if (nrfCharacteristicHandles[i].value_handle == handle_value) { handleEvent(event, i); break; } } }