Michael Galis / nRF51822

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Fork of nRF51822 by Nordic Semiconductor

source/nRF5xGap.h@571:bbf6410b6a89, 2016-01-11 (annotated)

Committer:
vcoubard
Date:
Mon Jan 11 10:19:22 2016 +0000
Revision:
571:bbf6410b6a89
Parent:
570:f162898cb6c4
Child:
575:7023a8204a1b
Synchronized with git rev 752e2ba4

Author: Rohit Grover

Merge pull request #88 from rgrover/develop



follow the extraction of address related types from Gap.h into BLEProtocol.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vcoubard 541:884f95bf5351 1 /* mbed Microcontroller Library
vcoubard 541:884f95bf5351 2 * Copyright (c) 2006-2013 ARM Limited
vcoubard 541:884f95bf5351 3 *
vcoubard 541:884f95bf5351 4 * Licensed under the Apache License, Version 2.0 (the "License");
vcoubard 541:884f95bf5351 5 * you may not use this file except in compliance with the License.
vcoubard 541:884f95bf5351 6 * You may obtain a copy of the License at
vcoubard 541:884f95bf5351 7 *
vcoubard 541:884f95bf5351 8 * http://www.apache.org/licenses/LICENSE-2.0
vcoubard 541:884f95bf5351 9 *
vcoubard 541:884f95bf5351 10 * Unless required by applicable law or agreed to in writing, software
vcoubard 541:884f95bf5351 11 * distributed under the License is distributed on an "AS IS" BASIS,
vcoubard 541:884f95bf5351 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
vcoubard 541:884f95bf5351 13 * See the License for the specific language governing permissions and
vcoubard 541:884f95bf5351 14 * limitations under the License.
vcoubard 541:884f95bf5351 15 */
vcoubard 541:884f95bf5351 16
vcoubard 541:884f95bf5351 17 #ifndef __NRF5x_GAP_H__
vcoubard 541:884f95bf5351 18 #define __NRF5x_GAP_H__
vcoubard 541:884f95bf5351 19
vcoubard 541:884f95bf5351 20 #include "mbed.h"
vcoubard 541:884f95bf5351 21 #include "ble/blecommon.h"
vcoubard 541:884f95bf5351 22 #include "ble.h"
vcoubard 541:884f95bf5351 23 #include "ble/GapAdvertisingParams.h"
vcoubard 541:884f95bf5351 24 #include "ble/GapAdvertisingData.h"
vcoubard 541:884f95bf5351 25 #include "ble/Gap.h"
vcoubard 541:884f95bf5351 26 #include "ble/GapScanningParams.h"
vcoubard 541:884f95bf5351 27
vcoubard 541:884f95bf5351 28 #include "nrf_soc.h"
vcoubard 549:3f782c64d014 29
vcoubard 549:3f782c64d014 30 extern "C" {
vcoubard 541:884f95bf5351 31 #include "ble_radio_notification.h"
vcoubard 549:3f782c64d014 32 }
vcoubard 549:3f782c64d014 33
vcoubard 541:884f95bf5351 34 #include "btle_security.h"
vcoubard 541:884f95bf5351 35
vcoubard 541:884f95bf5351 36 void radioNotificationStaticCallback(bool param);
vcoubard 541:884f95bf5351 37
vcoubard 541:884f95bf5351 38 /**************************************************************************/
vcoubard 541:884f95bf5351 39 /*!
vcoubard 541:884f95bf5351 40 \brief
vcoubard 541:884f95bf5351 41
vcoubard 541:884f95bf5351 42 */
vcoubard 541:884f95bf5351 43 /**************************************************************************/
vcoubard 541:884f95bf5351 44 class nRF5xGap : public Gap
vcoubard 541:884f95bf5351 45 {
vcoubard 541:884f95bf5351 46 public:
vcoubard 571:bbf6410b6a89 47 static nRF5xGap &getInstance();
vcoubard 571:bbf6410b6a89 48
vcoubard 541:884f95bf5351 49 /* Functions that must be implemented from Gap */
vcoubard 541:884f95bf5351 50 virtual ble_error_t setAddress(AddressType_t type, const Address_t address);
vcoubard 541:884f95bf5351 51 virtual ble_error_t getAddress(AddressType_t *typeP, Address_t address);
vcoubard 541:884f95bf5351 52 virtual ble_error_t setAdvertisingData(const GapAdvertisingData &, const GapAdvertisingData &);
vcoubard 541:884f95bf5351 53
vcoubard 541:884f95bf5351 54 virtual uint16_t getMinAdvertisingInterval(void) const {return GapAdvertisingParams::ADVERTISEMENT_DURATION_UNITS_TO_MS(BLE_GAP_ADV_INTERVAL_MIN);}
vcoubard 541:884f95bf5351 55 virtual uint16_t getMinNonConnectableAdvertisingInterval(void) const {return GapAdvertisingParams::ADVERTISEMENT_DURATION_UNITS_TO_MS(BLE_GAP_ADV_NONCON_INTERVAL_MIN);}
vcoubard 541:884f95bf5351 56 virtual uint16_t getMaxAdvertisingInterval(void) const {return GapAdvertisingParams::ADVERTISEMENT_DURATION_UNITS_TO_MS(BLE_GAP_ADV_INTERVAL_MAX);}
vcoubard 541:884f95bf5351 57
vcoubard 541:884f95bf5351 58 virtual ble_error_t startAdvertising(const GapAdvertisingParams &);
vcoubard 541:884f95bf5351 59 virtual ble_error_t stopAdvertising(void);
vcoubard 541:884f95bf5351 60 virtual ble_error_t connect(const Address_t, Gap::AddressType_t peerAddrType, const ConnectionParams_t *connectionParams, const GapScanningParams *scanParams);
vcoubard 541:884f95bf5351 61 virtual ble_error_t disconnect(Handle_t connectionHandle, DisconnectionReason_t reason);
vcoubard 541:884f95bf5351 62 virtual ble_error_t disconnect(DisconnectionReason_t reason);
vcoubard 541:884f95bf5351 63
vcoubard 541:884f95bf5351 64 virtual ble_error_t setDeviceName(const uint8_t *deviceName);
vcoubard 541:884f95bf5351 65 virtual ble_error_t getDeviceName(uint8_t *deviceName, unsigned *lengthP);
vcoubard 541:884f95bf5351 66 virtual ble_error_t setAppearance(GapAdvertisingData::Appearance appearance);
vcoubard 541:884f95bf5351 67 virtual ble_error_t getAppearance(GapAdvertisingData::Appearance *appearanceP);
vcoubard 541:884f95bf5351 68
vcoubard 541:884f95bf5351 69 virtual ble_error_t setTxPower(int8_t txPower);
vcoubard 541:884f95bf5351 70 virtual void getPermittedTxPowerValues(const int8_t **valueArrayPP, size_t *countP);
vcoubard 541:884f95bf5351 71
vcoubard 541:884f95bf5351 72 void setConnectionHandle(uint16_t con_handle);
vcoubard 541:884f95bf5351 73 uint16_t getConnectionHandle(void);
vcoubard 541:884f95bf5351 74
vcoubard 541:884f95bf5351 75 virtual ble_error_t getPreferredConnectionParams(ConnectionParams_t *params);
vcoubard 541:884f95bf5351 76 virtual ble_error_t setPreferredConnectionParams(const ConnectionParams_t *params);
vcoubard 541:884f95bf5351 77 virtual ble_error_t updateConnectionParams(Handle_t handle, const ConnectionParams_t *params);
vcoubard 541:884f95bf5351 78
vcoubard 541:884f95bf5351 79 virtual ble_error_t initRadioNotification(void) {
vcoubard 541:884f95bf5351 80 if (ble_radio_notification_init(NRF_APP_PRIORITY_HIGH, NRF_RADIO_NOTIFICATION_DISTANCE_800US, radioNotificationStaticCallback) == NRF_SUCCESS) {
vcoubard 541:884f95bf5351 81 return BLE_ERROR_NONE;
vcoubard 541:884f95bf5351 82 }
vcoubard 541:884f95bf5351 83
vcoubard 541:884f95bf5351 84 return BLE_ERROR_UNSPECIFIED;
vcoubard 541:884f95bf5351 85 }
vcoubard 541:884f95bf5351 86
vcoubard 541:884f95bf5351 87 /* Observer role is not supported by S110, return BLE_ERROR_NOT_IMPLEMENTED */
vcoubard 541:884f95bf5351 88 #if !defined(TARGET_MCU_NRF51_16K_S110) && !defined(TARGET_MCU_NRF51_32K_S110)
vcoubard 541:884f95bf5351 89 virtual ble_error_t startRadioScan(const GapScanningParams &scanningParams) {
vcoubard 541:884f95bf5351 90 ble_gap_scan_params_t scanParams = {
vcoubard 541:884f95bf5351 91 .active = scanningParams.getActiveScanning(), /**< If 1, perform active scanning (scan requests). */
vcoubard 541:884f95bf5351 92 .selective = 0, /**< If 1, ignore unknown devices (non whitelisted). */
vcoubard 541:884f95bf5351 93 .p_whitelist = NULL, /**< Pointer to whitelist, NULL if none is given. */
vcoubard 541:884f95bf5351 94 .interval = scanningParams.getInterval(), /**< Scan interval between 0x0004 and 0x4000 in 0.625ms units (2.5ms to 10.24s). */
vcoubard 541:884f95bf5351 95 .window = scanningParams.getWindow(), /**< Scan window between 0x0004 and 0x4000 in 0.625ms units (2.5ms to 10.24s). */
vcoubard 541:884f95bf5351 96 .timeout = scanningParams.getTimeout(), /**< Scan timeout between 0x0001 and 0xFFFF in seconds, 0x0000 disables timeout. */
vcoubard 541:884f95bf5351 97 };
vcoubard 541:884f95bf5351 98
vcoubard 541:884f95bf5351 99 if (sd_ble_gap_scan_start(&scanParams) != NRF_SUCCESS) {
vcoubard 541:884f95bf5351 100 return BLE_ERROR_PARAM_OUT_OF_RANGE;
vcoubard 541:884f95bf5351 101 }
vcoubard 541:884f95bf5351 102
vcoubard 541:884f95bf5351 103 return BLE_ERROR_NONE;
vcoubard 541:884f95bf5351 104 }
vcoubard 541:884f95bf5351 105
vcoubard 541:884f95bf5351 106 virtual ble_error_t stopScan(void) {
vcoubard 541:884f95bf5351 107 if (sd_ble_gap_scan_stop() == NRF_SUCCESS) {
vcoubard 541:884f95bf5351 108 return BLE_ERROR_NONE;
vcoubard 541:884f95bf5351 109 }
vcoubard 541:884f95bf5351 110
vcoubard 541:884f95bf5351 111 return BLE_STACK_BUSY;
vcoubard 541:884f95bf5351 112 }
vcoubard 541:884f95bf5351 113 #endif
vcoubard 541:884f95bf5351 114
vcoubard 541:884f95bf5351 115 private:
vcoubard 546:1e147322b2b5 116 bool radioNotificationCallbackParam; /* parameter to be passed into the Timeout-generated radio notification callback. */
vcoubard 546:1e147322b2b5 117 Timeout radioNotificationTimeout;
vcoubard 546:1e147322b2b5 118
vcoubard 546:1e147322b2b5 119 /*
vcoubard 550:bcb632fc92df 120 * A helper function to post radio notification callbacks with low interrupt priority.
vcoubard 546:1e147322b2b5 121 */
vcoubard 546:1e147322b2b5 122 void postRadioNotificationCallback(void) {
vcoubard 550:bcb632fc92df 123 #ifdef YOTTA_CFG_MBED_OS
vcoubard 550:bcb632fc92df 124 /*
vcoubard 550:bcb632fc92df 125 * In mbed OS, all user-facing BLE events (interrupts) are posted to the
vcoubard 550:bcb632fc92df 126 * MINAR scheduler to be executed as callbacks in thread mode. MINAR guards
vcoubard 550:bcb632fc92df 127 * its critical sections from interrupts by acquiring CriticalSectionLock,
vcoubard 550:bcb632fc92df 128 * which results in a call to sd_nvic_critical_region_enter(). Thus, it is
vcoubard 550:bcb632fc92df 129 * safe to invoke MINAR APIs from interrupt context as long as those
vcoubard 550:bcb632fc92df 130 * interrupts are blocked by sd_nvic_critical_region_enter().
vcoubard 550:bcb632fc92df 131 *
vcoubard 550:bcb632fc92df 132 * Radio notifications are a special case for the above. The Radio
vcoubard 550:bcb632fc92df 133 * Notification IRQ is handled at a very high priority--higher than the
vcoubard 550:bcb632fc92df 134 * level blocked by sd_nvic_critical_region_enter(). Thus Radio Notification
vcoubard 550:bcb632fc92df 135 * events can preempt MINAR's critical sections. Using MINAR APIs (such as
vcoubard 550:bcb632fc92df 136 * posting an event) directly in processRadioNotification() may result in a
vcoubard 550:bcb632fc92df 137 * race condition ending in a hard-fault.
vcoubard 550:bcb632fc92df 138 *
vcoubard 550:bcb632fc92df 139 * The solution is to *not* call MINAR APIs directly from the Radio
vcoubard 550:bcb632fc92df 140 * Notification handling; i.e. to do the bulk of RadioNotification
vcoubard 550:bcb632fc92df 141 * processing at a reduced priority which respects MINAR's critical
vcoubard 550:bcb632fc92df 142 * sections. Unfortunately, on a cortex-M0, there is no clean way to demote
vcoubard 550:bcb632fc92df 143 * priority for the currently executing interrupt--we wouldn't want to
vcoubard 550:bcb632fc92df 144 * demote the radio notification handling anyway because it is sensitive to
vcoubard 550:bcb632fc92df 145 * timing, and the system expects to finish this handling very quickly. The
vcoubard 550:bcb632fc92df 146 * workaround is to employ a Timeout to trigger
vcoubard 550:bcb632fc92df 147 * postRadioNotificationCallback() after a very short delay (~0 us) and post
vcoubard 550:bcb632fc92df 148 * the MINAR callback that context.
vcoubard 550:bcb632fc92df 149 *
vcoubard 550:bcb632fc92df 150 * !!!WARNING!!! Radio notifications are very time critical events. The
vcoubard 550:bcb632fc92df 151 * current solution is expected to work under the assumption that
vcoubard 550:bcb632fc92df 152 * postRadioNotificationCalback() will be executed BEFORE the next radio
vcoubard 550:bcb632fc92df 153 * notification event is generated.
vcoubard 550:bcb632fc92df 154 */
vcoubard 546:1e147322b2b5 155 minar::Scheduler::postCallback(
vcoubard 546:1e147322b2b5 156 mbed::util::FunctionPointer1<void, bool>(&radioNotificationCallback, &FunctionPointerWithContext<bool>::call).bind(radioNotificationCallbackParam)
vcoubard 546:1e147322b2b5 157 );
vcoubard 550:bcb632fc92df 158 #else
vcoubard 550:bcb632fc92df 159 /*
vcoubard 550:bcb632fc92df 160 * In mbed classic, all user-facing BLE events execute callbacks in interrupt
vcoubard 550:bcb632fc92df 161 * mode. Radio Notifications are a special case because its IRQ is handled at
vcoubard 550:bcb632fc92df 162 * a very high priority. Thus Radio Notification events can preempt other
vcoubard 550:bcb632fc92df 163 * operations that require interaction with the SoftDevice such as advertising
vcoubard 550:bcb632fc92df 164 * payload updates and changing the Gap state. Therefore, executing a Radio
vcoubard 550:bcb632fc92df 165 * Notification callback directly from processRadioNotification() may result
vcoubard 550:bcb632fc92df 166 * in a race condition ending in a hard-fault.
vcoubard 550:bcb632fc92df 167 *
vcoubard 550:bcb632fc92df 168 * The solution is to *not* execute the Radio Notification callback directly
vcoubard 550:bcb632fc92df 169 * from the Radio Notification handling; i.e. to do the bulk of the
vcoubard 550:bcb632fc92df 170 * Radio Notification processing at a reduced priority. Unfortunately, on a
vcoubard 550:bcb632fc92df 171 * cortex-M0, there is no clean way to demote priority for the currently
vcoubard 550:bcb632fc92df 172 * executing interrupt--we wouldn't want to demote the radio notification
vcoubard 550:bcb632fc92df 173 * handling anyway because it is sensitive to timing, and the system expects
vcoubard 550:bcb632fc92df 174 * to finish this handling very quickly. The workaround is to employ a Timeout
vcoubard 550:bcb632fc92df 175 * to trigger postRadioNotificationCallback() after a very short delay (~0 us)
vcoubard 550:bcb632fc92df 176 * and execute the callback in that context.
vcoubard 550:bcb632fc92df 177 *
vcoubard 550:bcb632fc92df 178 * !!!WARNING!!! Radio notifications are very time critical events. The
vcoubard 550:bcb632fc92df 179 * current solution is expected to work under the assumption that
vcoubard 550:bcb632fc92df 180 * postRadioNotificationCalback() will be executed BEFORE the next radio
vcoubard 550:bcb632fc92df 181 * notification event is generated.
vcoubard 550:bcb632fc92df 182 */
vcoubard 550:bcb632fc92df 183 radioNotificationCallback.call(radioNotificationCallbackParam);
vcoubard 550:bcb632fc92df 184 #endif /* #ifdef YOTTA_CFG_MBED_OS */
vcoubard 546:1e147322b2b5 185 }
vcoubard 546:1e147322b2b5 186
vcoubard 541:884f95bf5351 187 /**
vcoubard 541:884f95bf5351 188 * A helper function to process radio-notification events; to be called internally.
vcoubard 541:884f95bf5351 189 * @param param [description]
vcoubard 541:884f95bf5351 190 */
vcoubard 541:884f95bf5351 191 void processRadioNotificationEvent(bool param) {
vcoubard 546:1e147322b2b5 192 radioNotificationCallbackParam = param;
vcoubard 546:1e147322b2b5 193 radioNotificationTimeout.attach_us(this, &nRF5xGap::postRadioNotificationCallback, 0);
vcoubard 541:884f95bf5351 194 }
vcoubard 541:884f95bf5351 195 friend void radioNotificationStaticCallback(bool param); /* allow invocations of processRadioNotificationEvent() */
vcoubard 541:884f95bf5351 196
vcoubard 541:884f95bf5351 197 private:
vcoubard 541:884f95bf5351 198 uint16_t m_connectionHandle;
vcoubard 541:884f95bf5351 199 nRF5xGap() {
vcoubard 541:884f95bf5351 200 m_connectionHandle = BLE_CONN_HANDLE_INVALID;
vcoubard 541:884f95bf5351 201 }
vcoubard 541:884f95bf5351 202
vcoubard 541:884f95bf5351 203 nRF5xGap(nRF5xGap const &);
vcoubard 541:884f95bf5351 204 void operator=(nRF5xGap const &);
vcoubard 541:884f95bf5351 205 };
vcoubard 541:884f95bf5351 206
rgrover1 388:db85a09c27ef 207 #endif // ifndef __NRF5x_GAP_H__