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/* 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.
*/
#ifndef __NRF51822_GATT_CLIENT_H__
#define __NRF51822_GATT_CLIENT_H__
#include "ble/GattClient.h"
#include "nRF5xServiceDiscovery.h"
#include "nRF5xCharacteristicDescriptorDiscoverer.h"
class nRF5xGattClient : public GattClient
{
public:
/**
* When using S110, all Gatt client features will return
* BLE_ERROR_NOT_IMPLEMENTED
*/
#if !defined(TARGET_MCU_NRF51_16K_S110) && !defined(TARGET_MCU_NRF51_32K_S110)
/**
* Launch service discovery. Once launched, service discovery will remain
* active with callbacks being issued back into the application for matching
* services/characteristics. isActive() can be used to determine status; and
* a termination callback (if setup) will be invoked at the end. Service
* discovery can be terminated prematurely if needed using terminate().
*
* @param connectionHandle
* Handle for the connection with the peer.
* @param sc
* This is the application callback for matching service. Taken as
* NULL by default. Note: service discovery may still be active
* when this callback is issued; calling asynchronous BLE-stack
* APIs from within this application callback might cause the
* stack to abort service discovery. If this becomes an issue, it
* may be better to make local copy of the discoveredService and
* wait for service discovery to terminate before operating on the
* service.
* @param cc
* This is the application callback for matching characteristic.
* Taken as NULL by default. Note: service discovery may still be
* active when this callback is issued; calling asynchronous
* BLE-stack APIs from within this application callback might cause
* the stack to abort service discovery. If this becomes an issue,
* it may be better to make local copy of the discoveredCharacteristic
* and wait for service discovery to terminate before operating on the
* characteristic.
* @param matchingServiceUUID
* UUID based filter for specifying a service in which the application is
* interested. By default it is set as the wildcard UUID_UNKNOWN,
* in which case it matches all services. If characteristic-UUID
* filter (below) is set to the wildcard value, then a service
* callback will be invoked for the matching service (or for every
* service if the service filter is a wildcard).
* @param matchingCharacteristicUUIDIn
* UUID based filter for specifying characteristic in which the application
* is interested. By default it is set as the wildcard UUID_UKNOWN
* to match against any characteristic. If both service-UUID
* filter and characteristic-UUID filter are used with non- wildcard
* values, then only a single characteristic callback is
* invoked for the matching characteristic.
*
* @Note Using wildcard values for both service-UUID and characteristic-
* UUID will result in complete service discovery--callbacks being
* called for every service and characteristic.
*
* @return
* BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
*/
virtual ble_error_t launchServiceDiscovery(Gap::Handle_t connectionHandle,
ServiceDiscovery::ServiceCallback_t sc = NULL,
ServiceDiscovery::CharacteristicCallback_t cc = NULL,
const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN),
const UUID &matchingCharacteristicUUIDIn = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN));
virtual void onServiceDiscoveryTermination(ServiceDiscovery::TerminationCallback_t callback) {
_discovery.onTermination(callback);
}
/**
* Is service-discovery currently active?
*/
virtual bool isServiceDiscoveryActive(void) const {
return _discovery.isActive();
}
/**
* Terminate an ongoing service-discovery. This should result in an
* invocation of the TerminationCallback if service-discovery is active.
*/
virtual void terminateServiceDiscovery(void) {
_discovery.terminate();
}
/**
* @brief Implementation of GattClient::discoverCharacteristicDescriptors
* @see GattClient::discoverCharacteristicDescriptors
*/
virtual ble_error_t discoverCharacteristicDescriptors(
const DiscoveredCharacteristic& characteristic,
const CharacteristicDescriptorDiscovery::DiscoveryCallback_t& discoveryCallback,
const CharacteristicDescriptorDiscovery::TerminationCallback_t& terminationCallback
);
/**
* @brief Implementation of GattClient::isCharacteristicDiscoveryActive
* @see GattClient::isCharacteristicDiscoveryActive
*/
virtual bool isCharacteristicDescriptorsDiscoveryActive(const DiscoveredCharacteristic& characteristic) const;
/**
* @brief Implementation of GattClient::terminateCharacteristicDiscovery
* @see GattClient::terminateCharacteristicDiscovery
*/
virtual void terminateCharacteristicDescriptorsDiscovery(const DiscoveredCharacteristic& characteristic);
virtual ble_error_t read(Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, uint16_t offset) const {
uint32_t rc = sd_ble_gattc_read(connHandle, attributeHandle, offset);
if (rc == NRF_SUCCESS) {
return BLE_ERROR_NONE;
}
switch (rc) {
case NRF_ERROR_BUSY:
return BLE_STACK_BUSY;
case BLE_ERROR_INVALID_CONN_HANDLE:
case NRF_ERROR_INVALID_STATE:
case NRF_ERROR_INVALID_ADDR:
default:
return BLE_ERROR_INVALID_STATE;
}
}
virtual ble_error_t write(GattClient::WriteOp_t cmd, Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, size_t length, const uint8_t *value) const {
ble_gattc_write_params_t writeParams;
writeParams.write_op = cmd;
writeParams.flags = 0; /* this is inconsequential */
writeParams.handle = attributeHandle;
writeParams.offset = 0;
writeParams.len = length;
writeParams.p_value = const_cast<uint8_t *>(value);
uint32_t rc = sd_ble_gattc_write(connHandle, &writeParams);
if (rc == NRF_SUCCESS) {
return BLE_ERROR_NONE;
}
switch (rc) {
case NRF_ERROR_BUSY:
return BLE_STACK_BUSY;
case BLE_ERROR_NO_TX_BUFFERS:
return BLE_ERROR_NO_MEM;
case BLE_ERROR_INVALID_CONN_HANDLE:
case NRF_ERROR_INVALID_STATE:
case NRF_ERROR_INVALID_ADDR:
default:
return BLE_ERROR_INVALID_STATE;
}
}
/**
* @brief Clear nRF5xGattClient's state.
*
* @return
* BLE_ERROR_NONE if successful.
*/
virtual ble_error_t reset(void) {
/* Clear all state that is from the parent, including private members */
if (GattClient::reset() != BLE_ERROR_NONE) {
return BLE_ERROR_INVALID_STATE;
}
/* Clear derived class members */
_discovery.reset();
return BLE_ERROR_NONE;
}
public:
/*
* Allow instantiation from nRF5xn when required.
*/
friend class nRF5xn;
nRF5xGattClient() : _discovery(this) {
/* empty */
}
nRF5xServiceDiscovery& discovery() {
return _discovery;
}
nRF5xCharacteristicDescriptorDiscoverer& characteristicDescriptorDiscoverer() {
return _characteristicDescriptorDiscoverer;
}
private:
nRF5xGattClient(const nRF5xGattClient &);
const nRF5xGattClient& operator=(const nRF5xGattClient &);
private:
nRF5xServiceDiscovery _discovery;
nRF5xCharacteristicDescriptorDiscoverer _characteristicDescriptorDiscoverer;
#endif // if !S110
};
#endif // ifndef __NRF51822_GATT_CLIENT_H__
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