Nordic stack and drivers for the mbed BLE API
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Diff: TARGET_MCU_NRF51822/source/btle/btle_gap.cpp
- Revision:
- 638:c90ae1400bf2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TARGET_MCU_NRF51822/source/btle/btle_gap.cpp Wed Sep 14 14:39:43 2016 +0100 @@ -0,0 +1,99 @@ +/* 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 "common/common.h" + +#include "ble_gap.h" +#include "ble_conn_params.h" + +static inline uint32_t msec_to_1_25msec(uint32_t interval_ms) ATTR_ALWAYS_INLINE ATTR_CONST; +#if SDK_CONN_PARAMS_MODULE_ENABLE +static void error_callback(uint32_t nrf_error); +#endif // SDK_CONN_PARAMS_MODULE_ENABLE + +/**************************************************************************/ +/*! + @brief Initialise GAP in the underlying SoftDevice + + @returns +*/ +/**************************************************************************/ +error_t btle_gap_init(void) +{ + ble_gap_conn_params_t gap_conn_params = {0}; + + gap_conn_params.min_conn_interval = msec_to_1_25msec(CFG_GAP_CONNECTION_MIN_INTERVAL_MS); // in 1.25ms units + gap_conn_params.max_conn_interval = msec_to_1_25msec(CFG_GAP_CONNECTION_MAX_INTERVAL_MS); // in 1.25ms unit + gap_conn_params.slave_latency = CFG_GAP_CONNECTION_SLAVE_LATENCY; + gap_conn_params.conn_sup_timeout = CFG_GAP_CONNECTION_SUPERVISION_TIMEOUT_MS / 10; // in 10ms unit + + ble_gap_conn_sec_mode_t sec_mode; + BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode); // no security is needed + + ASSERT_STATUS( sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *) CFG_GAP_LOCAL_NAME, strlen(CFG_GAP_LOCAL_NAME))); + ASSERT_STATUS( sd_ble_gap_appearance_set(CFG_GAP_APPEARANCE)); + ASSERT_STATUS( sd_ble_gap_ppcp_set(&gap_conn_params)); + ASSERT_STATUS( sd_ble_gap_tx_power_set(CFG_BLE_TX_POWER_LEVEL)); + + /** + * Call to conn_params_init() is not necessary; and so is disabled by default. + * This API should be exposed to the user to be invoked when necessary. + */ +#if SDK_CONN_PARAMS_MODULE_ENABLE + /* Connection Parameters */ + enum { + FIRST_UPDATE_DELAY = APP_TIMER_TICKS(5000, CFG_TIMER_PRESCALER), + NEXT_UPDATE_DELAY = APP_TIMER_TICKS(5000, CFG_TIMER_PRESCALER), + MAX_UPDATE_COUNT = 3 + }; + + ble_conn_params_init_t cp_init = {0}; + + cp_init.p_conn_params = NULL; + cp_init.first_conn_params_update_delay = FIRST_UPDATE_DELAY; + cp_init.next_conn_params_update_delay = NEXT_UPDATE_DELAY; + cp_init.max_conn_params_update_count = MAX_UPDATE_COUNT; + cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID; + cp_init.disconnect_on_fail = true; + cp_init.evt_handler = NULL; + cp_init.error_handler = error_callback; + + ASSERT_STATUS ( ble_conn_params_init(&cp_init)); +#endif // SDK_CONN_PARAMS_MODULE_ENABLE + + return ERROR_NONE; +} + +/**************************************************************************/ +/*! + @brief Converts msecs to an integer representing 1.25ms units + + @param[in] ms + The number of milliseconds to conver to 1.25ms units + + @returns The number of 1.25ms units in the supplied number of ms +*/ +/**************************************************************************/ +static inline uint32_t msec_to_1_25msec(uint32_t interval_ms) +{ + return (interval_ms * 4) / 5; +} + +#if SDK_CONN_PARAMS_MODULE_ENABLE +static void error_callback(uint32_t nrf_error) +{ + ASSERT_STATUS_RET_VOID( nrf_error ); +} +#endif // SDK_CONN_PARAMS_MODULE_ENABLE