nrf51822/source/nRF5xGap.h

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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 __NRF5x_GAP_H__
#define __NRF5x_GAP_H__
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#include "mbed.h"
#include "ble/blecommon.h"
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#include "ble.h"
#include "ble/GapAdvertisingParams.h"
#include "ble/GapAdvertisingData.h"
#include "ble/Gap.h"
#include "ble/GapScanningParams.h"
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#include "nrf_soc.h"
#include "ble_radio_notification.h"
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#include "btle_security.h"
void radioNotificationStaticCallback(bool param);
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/**************************************************************************/
/*!
\brief
*/
/**************************************************************************/
class nRF5xGap : public Gap
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{
public:
static nRF5xGap &getInstance();
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/* Functions that must be implemented from Gap */
virtual ble_error_t setAddress(AddressType_t type, const Address_t address);
virtual ble_error_t getAddress(AddressType_t *typeP, Address_t address);
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virtual ble_error_t setAdvertisingData(const GapAdvertisingData &, const GapAdvertisingData &);
virtual uint16_t getMinAdvertisingInterval(void) const {return GapAdvertisingParams::ADVERTISEMENT_DURATION_UNITS_TO_MS(BLE_GAP_ADV_INTERVAL_MIN);}
virtual uint16_t getMinNonConnectableAdvertisingInterval(void) const {return GapAdvertisingParams::ADVERTISEMENT_DURATION_UNITS_TO_MS(BLE_GAP_ADV_NONCON_INTERVAL_MIN);}
virtual uint16_t getMaxAdvertisingInterval(void) const {return GapAdvertisingParams::ADVERTISEMENT_DURATION_UNITS_TO_MS(BLE_GAP_ADV_INTERVAL_MAX);}
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virtual ble_error_t startAdvertising(const GapAdvertisingParams &);
virtual ble_error_t stopAdvertising(void);
virtual ble_error_t connect(const Address_t, Gap::AddressType_t peerAddrType, const ConnectionParams_t *connectionParams, const GapScanningParams *scanParams);
virtual ble_error_t disconnect(Handle_t connectionHandle, DisconnectionReason_t reason);
virtual ble_error_t disconnect(DisconnectionReason_t reason);
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virtual ble_error_t setDeviceName(const uint8_t *deviceName);
virtual ble_error_t getDeviceName(uint8_t *deviceName, unsigned *lengthP);
virtual ble_error_t setAppearance(GapAdvertisingData::Appearance appearance);
virtual ble_error_t getAppearance(GapAdvertisingData::Appearance *appearanceP);
virtual ble_error_t setTxPower(int8_t txPower);
virtual void getPermittedTxPowerValues(const int8_t **valueArrayPP, size_t *countP);
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void setConnectionHandle(uint16_t con_handle);
uint16_t getConnectionHandle(void);
virtual ble_error_t getPreferredConnectionParams(ConnectionParams_t *params);
virtual ble_error_t setPreferredConnectionParams(const ConnectionParams_t *params);
virtual ble_error_t updateConnectionParams(Handle_t handle, const ConnectionParams_t *params);
virtual ble_error_t initRadioNotification(void) {
if (ble_radio_notification_init(NRF_APP_PRIORITY_HIGH, NRF_RADIO_NOTIFICATION_DISTANCE_800US, radioNotificationStaticCallback) == NRF_SUCCESS) {
return BLE_ERROR_NONE;
}
return BLE_ERROR_UNSPECIFIED;
}
/* Observer role is not supported by S110, return BLE_ERROR_NOT_IMPLEMENTED */
#if !defined(TARGET_MCU_NRF51_16K_S110) && !defined(TARGET_MCU_NRF51_32K_S110)
virtual ble_error_t startRadioScan(const GapScanningParams &scanningParams) {
ble_gap_scan_params_t scanParams = {
.active = scanningParams.getActiveScanning(), /**< If 1, perform active scanning (scan requests). */
.selective = 0, /**< If 1, ignore unknown devices (non whitelisted). */
.p_whitelist = NULL, /**< Pointer to whitelist, NULL if none is given. */
.interval = scanningParams.getInterval(), /**< Scan interval between 0x0004 and 0x4000 in 0.625ms units (2.5ms to 10.24s). */
.window = scanningParams.getWindow(), /**< Scan window between 0x0004 and 0x4000 in 0.625ms units (2.5ms to 10.24s). */
.timeout = scanningParams.getTimeout(), /**< Scan timeout between 0x0001 and 0xFFFF in seconds, 0x0000 disables timeout. */
};
if (sd_ble_gap_scan_start(&scanParams) != NRF_SUCCESS) {
return BLE_ERROR_PARAM_OUT_OF_RANGE;
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}
return BLE_ERROR_NONE;
}
virtual ble_error_t stopScan(void) {
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if (sd_ble_gap_scan_stop() == NRF_SUCCESS) {
return BLE_ERROR_NONE;
}
return BLE_STACK_BUSY;
}
#endif
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private:
#ifdef YOTTA_CFG_MBED_OS
/* Store the current radio notification value that will be used in the next callback */
bool radioNotificationCallbackParam;
/*
* In mbed OS, the idea is to post all callbacks through minar scheduler. However, the radio notifications
* are handled in IRQs with very high priority. Trying to post a minar callback directly in
* processRadioNotification() will result in a hard-fault. This is because minar asumes that all callbacks
* are posted from low priority context, so when minar schedules the callback it attempts to enter a
* critical section and disable all interrupts. The problem is that minar tries to do this by invoking the
* SoftDevice with a call to sd_nvic_critical_region_enter() while already running in high priority. This
* results in the SoftDevice generating a hard-fault.
* A solution is to reduce the priority from which the callback is posted to minar. Unfortunately, there
* are not clean ways to do this. The solution implemented uses a Timeout to call
* postRadioNotificationCallback() after a very short delay (1 us) and post the minar callback there.
*
* !!!WARNING!!! Radio notifications are very time critical events. The current solution is expected to
* work under the assumption that postRadioNotificationCalback() will be executed BEFORE the next radio
* notification event is generated.
*/
Timeout radioNotificationTimeout;
/*
* A helper function to post radio notification callbacks through minar when using mbed OS.
*/
void postRadioNotificationCallback(void) {
minar::Scheduler::postCallback(
mbed::util::FunctionPointer1<void, bool>(&radioNotificationCallback, &FunctionPointerWithContext<bool>::call).bind(radioNotificationCallbackParam)
);
}
#endif
/**
* A helper function to process radio-notification events; to be called internally.
* @param param [description]
*/
void processRadioNotificationEvent(bool param) {
#ifdef YOTTA_CFG_MBED_OS
/* When using mbed OS the callback to the user-defined function will be posted through minar */
radioNotificationCallbackParam = param;
radioNotificationTimeout.attach_us(this, &nRF5xGap::postRadioNotificationCallback, 0);
#else
radioNotificationCallback.call(param);
#endif
}
friend void radioNotificationStaticCallback(bool param); /* allow invocations of processRadioNotificationEvent() */
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private:
uint16_t m_connectionHandle;
nRF5xGap() {
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m_connectionHandle = BLE_CONN_HANDLE_INVALID;
}
nRF5xGap(nRF5xGap const &);
void operator=(nRF5xGap const &);
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};
#endif // ifndef __NRF5x_GAP_H__