nRF51Gap.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "nRF51Gap.h"
00018 #include "mbed.h"
00019 
00020 #include "common/common.h "
00021 #include "ble_advdata.h "
00022 #include "ble_hci.h"
00023 
00024 /**************************************************************************/
00025 /*!
00026     @brief  Sets the advertising parameters and payload for the device
00027 
00028     @param[in]  params
00029                 Basic advertising details, including the advertising
00030                 delay, timeout and how the device should be advertised
00031     @params[in] advData
00032                 The primary advertising data payload
00033     @params[in] scanResponse
00034                 The optional Scan Response payload if the advertising
00035                 type is set to \ref GapAdvertisingParams::ADV_SCANNABLE_UNDIRECTED
00036                 in \ref GapAdveritinngParams
00037 
00038     @returns    \ref ble_error_t
00039 
00040     @retval     BLE_ERROR_NONE
00041                 Everything executed properly
00042 
00043     @retval     BLE_ERROR_BUFFER_OVERFLOW
00044                 The proposed action would cause a buffer overflow.  All
00045                 advertising payloads must be <= 31 bytes, for example.
00046 
00047     @retval     BLE_ERROR_NOT_IMPLEMENTED
00048                 A feature was requested that is not yet supported in the
00049                 nRF51 firmware or hardware.
00050 
00051     @retval     BLE_ERROR_PARAM_OUT_OF_RANGE
00052                 One of the proposed values is outside the valid range.
00053 
00054     @section EXAMPLE
00055 
00056     @code
00057 
00058     @endcode
00059 */
00060 /**************************************************************************/
00061 ble_error_t nRF51Gap::setAdvertisingData(const GapAdvertisingData &advData, const GapAdvertisingData &scanResponse)
00062 {
00063     /* Make sure we don't exceed the advertising payload length */
00064     if (advData.getPayloadLen() > GAP_ADVERTISING_DATA_MAX_PAYLOAD) {
00065         return BLE_ERROR_BUFFER_OVERFLOW;
00066     }
00067 
00068     /* Make sure we have a payload! */
00069     if (advData.getPayloadLen() == 0) {
00070         return BLE_ERROR_PARAM_OUT_OF_RANGE;
00071     }
00072 
00073     /* Check the scan response payload limits */
00074     //if ((params.getAdvertisingType() == GapAdvertisingParams::ADV_SCANNABLE_UNDIRECTED))
00075     //{
00076     //    /* Check if we're within the upper limit */
00077     //    if (advData.getPayloadLen() > GAP_ADVERTISING_DATA_MAX_PAYLOAD)
00078     //    {
00079     //        return BLE_ERROR_BUFFER_OVERFLOW;
00080     //    }
00081     //    /* Make sure we have a payload! */
00082     //    if (advData.getPayloadLen() == 0)
00083     //    {
00084     //        return BLE_ERROR_PARAM_OUT_OF_RANGE;
00085     //    }
00086     //}
00087 
00088     /* Send advertising data! */
00089     ASSERT(ERROR_NONE ==
00090            sd_ble_gap_adv_data_set(advData.getPayload(),
00091                                    advData.getPayloadLen(),
00092                                    scanResponse.getPayload(),
00093                                    scanResponse.getPayloadLen()),
00094            BLE_ERROR_PARAM_OUT_OF_RANGE);
00095 
00096     /* Make sure the GAP Service appearance value is aligned with the
00097      *appearance from GapAdvertisingData */
00098     ASSERT(ERROR_NONE == sd_ble_gap_appearance_set(advData.getAppearance()),
00099            BLE_ERROR_PARAM_OUT_OF_RANGE);
00100 
00101     /* ToDo: Perform some checks on the payload, for example the Scan Response can't */
00102     /* contains a flags AD type, etc. */
00103 
00104     return BLE_ERROR_NONE;
00105 }
00106 
00107 /**************************************************************************/
00108 /*!
00109     @brief  Starts the BLE HW, initialising any services that were
00110             added before this function was called.
00111 
00112     @note   All services must be added before calling this function!
00113 
00114     @returns    ble_error_t
00115 
00116     @retval     BLE_ERROR_NONE
00117                 Everything executed properly
00118 
00119     @section EXAMPLE
00120 
00121     @code
00122 
00123     @endcode
00124 */
00125 /**************************************************************************/
00126 ble_error_t nRF51Gap::startAdvertising(const GapAdvertisingParams &params)
00127 {
00128     /* Make sure we support the advertising type */
00129     if (params.getAdvertisingType() == GapAdvertisingParams::ADV_CONNECTABLE_DIRECTED) {
00130         /* ToDo: This requires a propery security implementation, etc. */
00131         return BLE_ERROR_NOT_IMPLEMENTED;
00132     }
00133 
00134     /* Check interval range */
00135     if (params.getAdvertisingType() == GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED) {
00136         /* Min delay is slightly longer for unconnectable devices */
00137         if ((params.getInterval() < GAP_ADV_PARAMS_INTERVAL_MIN_NONCON) ||
00138             (params.getInterval() > GAP_ADV_PARAMS_INTERVAL_MAX)) {
00139             return BLE_ERROR_PARAM_OUT_OF_RANGE;
00140         }
00141     } else {
00142         if ((params.getInterval() < GAP_ADV_PARAMS_INTERVAL_MIN) ||
00143             (params.getInterval() > GAP_ADV_PARAMS_INTERVAL_MAX)) {
00144             return BLE_ERROR_PARAM_OUT_OF_RANGE;
00145         }
00146     }
00147 
00148     /* Check timeout is zero for Connectable Directed */
00149     if ((params.getAdvertisingType() == GapAdvertisingParams::ADV_CONNECTABLE_DIRECTED) && (params.getTimeout() != 0)) {
00150         /* Timeout must be 0 with this type, although we'll never get here */
00151         /* since this isn't implemented yet anyway */
00152         return BLE_ERROR_PARAM_OUT_OF_RANGE;
00153     }
00154 
00155     /* Check timeout for other advertising types */
00156     if ((params.getAdvertisingType() != GapAdvertisingParams::ADV_CONNECTABLE_DIRECTED) &&
00157         (params.getTimeout() > GAP_ADV_PARAMS_TIMEOUT_MAX)) {
00158         return BLE_ERROR_PARAM_OUT_OF_RANGE;
00159     }
00160 
00161     /* Start Advertising */
00162     ble_gap_adv_params_t adv_para = {0};
00163 
00164     adv_para.type        = params.getAdvertisingType();
00165     adv_para.p_peer_addr = NULL;                         // Undirected advertisement
00166     adv_para.fp          = BLE_GAP_ADV_FP_ANY;
00167     adv_para.p_whitelist = NULL;
00168     adv_para.interval    = params.getInterval();         // advertising interval (in units of 0.625 ms)
00169     adv_para.timeout     = params.getTimeout();
00170 
00171     ASSERT(ERROR_NONE == sd_ble_gap_adv_start(&adv_para),
00172            BLE_ERROR_PARAM_OUT_OF_RANGE);
00173 
00174     state.advertising = 1;
00175 
00176     return BLE_ERROR_NONE;
00177 }
00178 
00179 /**************************************************************************/
00180 /*!
00181     @brief  Stops the BLE HW and disconnects from any devices
00182 
00183     @returns    ble_error_t
00184 
00185     @retval     BLE_ERROR_NONE
00186                 Everything executed properly
00187 
00188     @section EXAMPLE
00189 
00190     @code
00191 
00192     @endcode
00193 */
00194 /**************************************************************************/
00195 ble_error_t nRF51Gap::stopAdvertising(void)
00196 {
00197     /* Stop Advertising */
00198     ASSERT(ERROR_NONE == sd_ble_gap_adv_stop(), BLE_ERROR_PARAM_OUT_OF_RANGE);
00199 
00200     state.advertising = 0;
00201 
00202     return BLE_ERROR_NONE;
00203 }
00204 
00205 /**************************************************************************/
00206 /*!
00207     @brief  Disconnects if we are connected to a central device
00208 
00209     @returns    ble_error_t
00210 
00211     @retval     BLE_ERROR_NONE
00212                 Everything executed properly
00213 
00214     @section EXAMPLE
00215 
00216     @code
00217 
00218     @endcode
00219 */
00220 /**************************************************************************/
00221 ble_error_t nRF51Gap::disconnect(void)
00222 {
00223     state.advertising = 0;
00224     state.connected   = 0;
00225 
00226     /* Disconnect if we are connected to a central device */
00227     ASSERT_INT(ERROR_NONE,
00228                sd_ble_gap_disconnect(m_connectionHandle,
00229                                      BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION),
00230                BLE_ERROR_PARAM_OUT_OF_RANGE);
00231 
00232     return BLE_ERROR_NONE;
00233 }
00234 
00235 /**************************************************************************/
00236 /*!
00237     @brief  Sets the 16-bit connection handle
00238 */
00239 /**************************************************************************/
00240 void nRF51Gap::setConnectionHandle(uint16_t con_handle)
00241 {
00242     m_connectionHandle = con_handle;
00243 }
00244 
00245 /**************************************************************************/
00246 /*!
00247     @brief  Gets the 16-bit connection handle
00248 */
00249 /**************************************************************************/
00250 uint16_t nRF51Gap::getConnectionHandle(void)
00251 {
00252     return m_connectionHandle;
00253 }
00254 
00255 /**************************************************************************/
00256 /*!
00257     @brief      Sets the BLE device address
00258 
00259     @returns    ble_error_t
00260 
00261     @section EXAMPLE
00262 
00263     @code
00264 
00265     uint8_t device_address[6] = { 0xca, 0xfe, 0xf0, 0xf0, 0xf0, 0xf0 };
00266     nrf.getGap().setAddress(Gap::ADDR_TYPE_RANDOM_STATIC, device_address);
00267 
00268     @endcode
00269 */
00270 /**************************************************************************/
00271 ble_error_t nRF51Gap::setAddress(addr_type_t type, const uint8_t address[6])
00272 {
00273     if (type > ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE) {
00274         return BLE_ERROR_PARAM_OUT_OF_RANGE;
00275     }
00276 
00277     ble_gap_addr_t dev_addr;
00278     dev_addr.addr_type = type;
00279     memcpy(dev_addr.addr, address, 6);
00280 
00281     ASSERT_INT(ERROR_NONE,
00282                sd_ble_gap_address_set(&dev_addr),
00283                BLE_ERROR_PARAM_OUT_OF_RANGE);
00284 
00285     return BLE_ERROR_NONE;
00286 }