Diff: inc/bluetooth/MicroBitBLEManager.h

Revision:

1:8aa5cdb4ab67

Child:

3:d86a4ddc1867

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/inc/bluetooth/MicroBitBLEManager.h	Thu Apr 07 01:33:22 2016 +0100
@@ -0,0 +1,215 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 British Broadcasting Corporation.
+This software is provided by Lancaster University by arrangement with the BBC.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef MICROBIT_BLE_MANAGER_H
+#define MICROBIT_BLE_MANAGER_H
+
+#include "mbed.h"
+#include "MicroBitConfig.h"
+
+/*
+ * The underlying Nordic libraries that support BLE do not compile cleanly with the stringent GCC settings we employ
+ * If we're compiling under GCC, then we suppress any warnings generated from this code (but not the rest of the DAL)
+ * The ARM cc compiler is more tolerant. We don't test __GNUC__ here to detect GCC as ARMCC also typically sets this
+ * as a compatability option, but does not support the options used...
+ */
+#if !defined (__arm)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+#include "ble/BLE.h"
+
+/*
+ * Return to our predefined compiler settings.
+ */
+#if !defined (__arm)
+#pragma GCC diagnostic pop
+#endif
+
+#include "ble/services/DeviceInformationService.h"
+#include "MicroBitDFUService.h"
+#include "MicroBitEventService.h"
+#include "MicroBitLEDService.h"
+#include "MicroBitAccelerometerService.h"
+#include "MicroBitMagnetometerService.h"
+#include "MicroBitButtonService.h"
+#include "MicroBitIOPinService.h"
+#include "MicroBitTemperatureService.h"
+#include "ExternalEvents.h"
+#include "MicroBitButton.h"
+#include "MicroBitStorage.h"
+
+#define MICROBIT_BLE_PAIR_REQUEST               0x01
+#define MICROBIT_BLE_PAIR_COMPLETE              0x02
+#define MICROBIT_BLE_PAIR_PASSCODE              0x04
+#define MICROBIT_BLE_PAIR_SUCCESSFUL            0x08
+
+#define MICROBIT_BLE_PAIRING_TIMEOUT	        90
+#define MICROBIT_BLE_POWER_LEVELS               8
+#define MICROBIT_BLE_MAXIMUM_BONDS              4
+#define MICROBIT_BLE_ENABLE_BONDING 	        true
+
+extern const int8_t MICROBIT_BLE_POWER_LEVEL[];
+
+struct BLESysAttribute
+{
+    uint8_t         sys_attr[8] = { 0 };
+};
+
+struct BLESysAttributeStore
+{
+    BLESysAttribute sys_attrs[MICROBIT_BLE_MAXIMUM_BONDS];
+};
+
+/**
+  * Class definition for the MicroBitBLEManager.
+  *
+  */
+class MicroBitBLEManager : MicroBitComponent
+{
+    public:
+
+	// The mbed abstraction of the BlueTooth Low Energy (BLE) hardware
+    BLEDevice                       *ble;
+
+    //an instance of MicroBitStorage used to store sysAttrs from softdevice
+    MicroBitStorage* storage;
+
+    /**
+     * Constructor.
+     *
+     * Configure and manage the micro:bit's Bluetooth Low Energy (BLE) stack.
+     *
+     * @param _storage an instance of MicroBitStorage used to persist sys attribute information. (This is required for compatability with iOS).
+     *
+     * @note The BLE stack *cannot*  be brought up in a static context (the software simply hangs or corrupts itself).
+     * Hence, the init() member function should be used to initialise the BLE stack.
+     */
+    MicroBitBLEManager(MicroBitStorage& _storage);
+
+    /**
+     * Constructor.
+     *
+     * Configure and manage the micro:bit's Bluetooth Low Energy (BLE) stack.
+     *
+     * @note The BLE stack *cannot*  be brought up in a static context (the software simply hangs or corrupts itself).
+     * Hence, the init() member function should be used to initialise the BLE stack.
+     */
+    MicroBitBLEManager();
+
+    /**
+      * Post constructor initialisation method as the BLE stack cannot be brought
+      * up in a static context.
+      *
+      * @param deviceName The name used when advertising
+      * @param serialNumber The serial number exposed by the device information service
+      * @param messageBus An instance of an EventModel, used during pairing.
+      * @param enableBonding If true, the security manager enabled bonding.
+      *
+      * @code
+      * bleManager.init(uBit.getName(), uBit.getSerial(), uBit.messageBus, true);
+      * @endcode
+      */
+    void init(ManagedString deviceName, ManagedString serialNumber, EventModel& messageBus, bool enableBonding);
+
+    /**
+     * Change the output power level of the transmitter to the given value.
+     *
+     * @param power a value in the range 0..7, where 0 is the lowest power and 7 is the highest.
+     *
+     * @return MICROBIT_OK on success, or MICROBIT_INVALID_PARAMETER if the value is out of range.
+     *
+     * @code
+     * // maximum transmission power.
+     * bleManager.setTransmitPower(7);
+     * @endcode
+     */
+    int setTransmitPower(int power);
+
+    /**
+     * Enter pairing mode. This is mode is called to initiate pairing, and to enable FOTA programming
+     * of the micro:bit in cases where BLE is disabled during normal operation.
+     *
+     * @param display An instance of MicroBitDisplay used when displaying pairing information.
+     * @param authorizationButton The button to use to authorise a pairing request.
+     *
+     * @code
+     * // initiate pairing mode
+     * bleManager.pairingMode(uBit.display, uBit.buttonA);
+     * @endcode
+     */
+    void pairingMode(MicroBitDisplay &display, MicroBitButton &authorisationButton);
+
+    /**
+     * When called, the micro:bit will begin advertising for a predefined period,
+     * MICROBIT_BLE_ADVERTISING_TIMEOUT seconds to bonded devices.
+     */
+    void advertise();
+
+    /**
+     * Determines the number of devices currently bonded with this micro:bit.
+     * @return The number of active bonds.
+     */
+    int getBondCount();
+
+	/**
+	 * A request to pair has been received from a BLE device.
+     * If we're in pairing mode, display the passkey to the user.
+     * Also, purge the bonding table if it has reached capacity.
+     *
+     * @note for internal use only.
+	 */
+	void pairingRequested(ManagedString passKey);
+
+	/**
+	 * A pairing request has been sucessfully completed.
+	 * If we're in pairing mode, display a success or failure message.
+     *
+     * @note for internal use only.
+	 */
+	void pairingComplete(bool success);
+
+	/**
+     * Periodic callback in thread context.
+     * We use this here purely to safely issue a disconnect operation after a pairing operation is complete.
+	 */
+	void idleTick();
+
+    private:
+
+	/**
+	 * Displays the device's ID code as a histogram on the provided MicroBitDisplay instance.
+     *
+     * @param display The display instance used for displaying the histogram.
+	 */
+	void showNameHistogram(MicroBitDisplay &display);
+
+	int				pairingStatus;
+	ManagedString	passKey;
+	ManagedString	deviceName;
+
+};
+
+#endif