Diff: inc/bluetooth/MicroBitIOPinService.h

Revision:

1:8aa5cdb4ab67

Child:

33:58453d751bca

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/inc/bluetooth/MicroBitIOPinService.h	Thu Apr 07 01:33:22 2016 +0100
@@ -0,0 +1,143 @@
+/*
+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_IO_PIN_SERVICE_H
+#define MICROBIT_IO_PIN_SERVICE_H
+
+#include "MicroBitConfig.h"
+#include "ble/BLE.h"
+#include "MicroBitIO.h"
+
+#define MICROBIT_IO_PIN_SERVICE_PINCOUNT       20
+#define MICROBIT_IO_PIN_SERVICE_DATA_SIZE      10
+
+// UUIDs for our service and characteristics
+extern const uint8_t  MicroBitIOPinServiceUUID[];
+extern const uint8_t  MicroBitIOPinServiceADConfigurationUUID[];
+extern const uint8_t  MicroBitIOPinServiceIOConfigurationUUID[];
+extern const uint8_t  MicroBitIOPinServiceDataUUID[];
+extern MicroBitPin * const MicroBitIOPins[];
+
+/**
+  * Name value pair definition, as used to read and write pin values over BLE.
+  */
+struct IOData
+{
+    uint8_t     pin;
+    uint8_t     value;
+};
+
+/**
+  * Class definition for the custom MicroBit IOPin Service.
+  * Provides a BLE service to remotely read the state of the I/O Pin, and configure its behaviour.
+  */
+class MicroBitIOPinService : public MicroBitComponent
+{
+    public:
+
+    /**
+      * Constructor.
+      * Create a representation of the IOPinService
+      * @param _ble The instance of a BLE device that we're running on.
+      * @param _io An instance of MicroBitIO that this service will use to perform
+      *            I/O operations.
+      */
+    MicroBitIOPinService(BLEDevice &_ble, MicroBitIO &_io);
+
+    /**
+     * Periodic callback from MicroBit scheduler.
+     *
+     * Check if any of the pins we're watching need updating. Notify any connected
+     * device with any changes.
+     */
+    virtual void idleTick();
+
+    private:
+
+    /**
+      * Callback. Invoked when any of our attributes are written via BLE.
+      */
+    void onDataWritten(const GattWriteCallbackParams *params);
+
+    /**
+     * Callback. invoked when the BLE data characteristic is read.
+     *
+     * Reads all the pins marked as inputs, and updates the data stored in the characteristic.
+     */
+    void onDataRead(GattReadAuthCallbackParams *params);
+
+    /**
+      * Determines if the given pin was configured as a digital pin by the BLE ADPinConfigurationCharacterisitic.
+      *
+      * @param i the enumeration of the pin to test
+      * @return 1 if this pin is configured as digital, 0 otherwise
+      */
+    int isDigital(int i);
+
+    /**
+      * Determines if the given pin was configured as an analog pin by the BLE ADPinConfigurationCharacterisitic.
+      *
+      * @param i the enumeration of the pin to test
+      * @return 1 if this pin is configured as analog, 0 otherwise
+      */
+    int isAnalog(int i);
+
+    /**
+      * Determines if the given pin was configured as an input by the BLE IOPinConfigurationCharacterisitic.
+      *
+      * @param i the enumeration of the pin to test
+      * @return 1 if this pin is configured as an input, 0 otherwise
+      */
+    int isInput(int i);
+
+    /**
+      * Determines if the given pin was configured as output by the BLE IOPinConfigurationCharacterisitic.
+      *
+      * @param i the enumeration of the pin to test
+      * @return 1 if this pin is configured as an output, 0 otherwise
+      */
+    int isOutput(int i);
+
+
+    // Bluetooth stack we're running on.
+    BLEDevice           &ble;
+    MicroBitIO          &io;
+
+    // memory for our 8 bit control characteristics.
+    uint32_t            ioPinServiceADCharacteristicBuffer;
+    uint32_t            ioPinServiceIOCharacteristicBuffer;
+    IOData              ioPinServiceDataCharacteristicBuffer[MICROBIT_IO_PIN_SERVICE_DATA_SIZE];
+
+    // Historic information about our pin data data.
+    uint8_t             ioPinServiceIOData[MICROBIT_IO_PIN_SERVICE_PINCOUNT];
+
+    // Handles to access each characteristic when they are held by Soft Device.
+    GattAttribute::Handle_t ioPinServiceADCharacteristicHandle;
+    GattAttribute::Handle_t ioPinServiceIOCharacteristicHandle;
+    GattCharacteristic *ioPinServiceDataCharacteristic;
+};
+
+
+#endif