Diff: source/bluetooth/MicroBitAnimationService.cpp

Revision:

74:9771cd712730

Child:

77:9909cbcd0ece

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/bluetooth/MicroBitAnimationService.cpp	Tue Dec 27 10:48:18 2016 +0000
@@ -0,0 +1,146 @@
+/*
+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 Animation 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.
+*/
+
+/**
+  * Class definition for a MicroBit BLE Animation Service.
+  * Provides a BLE gateway onto an Animation Model.
+  */
+
+#include "MicroBitConfig.h"
+#include "MicroBitAnimationService.h"
+#include "ble/UUID.h"
+#include "Animator.h"
+
+/**
+  * Constructor.
+  * Create a representation of the AnimationService
+  * @param _ble The instance of a BLE device that we're running on.
+  */
+MicroBitAnimationService::MicroBitAnimationService(BLEDevice &_ble) :
+        ble(_ble)
+{
+    // UUID, valuePTR, length, max length, properties
+    GattCharacteristic  animationTypeCharacteristic(
+        MicroBitAnimationServiceAnimationTypeCharacteristicUUID, 
+        (uint8_t *)animation_type_buffer, 
+        1, 
+        1,
+        GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE);
+        
+    GattCharacteristic  animationStatusCharacteristic(
+        MicroBitAnimationServiceAnimationStatusCharacteristicUUID, 
+        (uint8_t *)animation_status_buffer, 
+        1, 
+        1,
+        GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
+
+    GattCharacteristic  animationControlCharacteristic(
+        MicroBitAnimationServiceAnimationControlCharacteristicUUID, 
+        (uint8_t *)animation_control_buffer, 
+        1, 
+        1,
+        GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE);
+
+    animation_type_buffer[0]    = 0x00;
+    animation_status_buffer[0]  = 0x00;
+    animation_control_buffer[0] = 0x00;
+
+    // Set default security requirements - optional
+    // animationTypeCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL);
+    // animationStatusCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL);
+    // animationControlCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL);
+
+    // create an array of our characteristics so we can pass them to the service when we create it
+    GattCharacteristic *characteristics[] = {&animationTypeCharacteristic, &animationStatusCharacteristic, &animationControlCharacteristic};
+
+    // create the animation service and specify its characteristics
+    GattService         service(MicroBitAnimationServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *));
+
+    // add the service to the Bluetooth attribute table
+    ble.addService(service);
+
+    // take a note of the handles of our new characteristics now that they're in the attribute table
+    animationTypeCharacteristicHandle = animationTypeCharacteristic.getValueHandle();
+    animationStatusCharacteristicHandle = animationStatusCharacteristic.getValueHandle();
+    animationControlCharacteristicHandle = animationControlCharacteristic.getValueHandle();
+    
+    ble.gattServer().write(animationTypeCharacteristicHandle, (const uint8_t *)&animation_type_buffer, sizeof(animation_type_buffer));
+    ble.gattServer().write(animationStatusCharacteristicHandle, (const uint8_t *)&animation_status_buffer, sizeof(animation_status_buffer));
+    ble.gattServer().write(animationControlCharacteristicHandle, (const uint8_t *)&animation_control_buffer, sizeof(animation_control_buffer));
+
+    // register a callback function for when a characteristic is written to
+    ble.onDataWritten(this, &MicroBitAnimationService::onDataWritten);
+    
+    // subscribe to animation status events so they can be notified to the connected client
+    if (EventModel::defaultEventBus)
+        EventModel::defaultEventBus->listen(ANIMATION_STATUS_EVENT, MICROBIT_EVT_ANY, this, &MicroBitAnimationService::animationStatusUpdate,  MESSAGE_BUS_LISTENER_IMMEDIATE);
+}
+
+
+/**
+  * Callback. Invoked when any of our attributes are written via BLE.
+  */
+void MicroBitAnimationService::onDataWritten(const GattWriteCallbackParams *params)
+{
+   
+    if (params->handle == animationTypeCharacteristicHandle && params->len >= 1) {
+        uint8_t *value = (uint8_t *)params->data;
+        uint16_t event_value = static_cast<uint16_t>(value[0]);
+        MicroBitEvent evt(ANIMATION_TYPE_EVENT, event_value);
+        return;
+    }
+
+    if (params->handle == animationControlCharacteristicHandle && params->len >= 1) {
+        uint8_t *value = (uint8_t *)params->data;
+        uint16_t event_value = static_cast<uint16_t>(value[0]);
+        MicroBitEvent evt(ANIMATION_CONTROL_EVENT, event_value);
+        return;
+    }
+}
+
+void MicroBitAnimationService::animationStatusUpdate(MicroBitEvent e)
+{
+    if (ble.getGapState().connected)
+    {
+        animation_status_buffer[0] = e.value;
+        ble.gattServer().notify(animationStatusCharacteristicHandle,(uint8_t *)animation_status_buffer, 1);
+    }
+}
+
+const uint8_t  MicroBitAnimationServiceUUID[] = {
+    0xe9,0x5d,0x71,0x70,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
+};
+
+const uint8_t  MicroBitAnimationServiceAnimationTypeCharacteristicUUID[] = {
+    0xe9,0x5d,0xC3,0x06,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
+};
+
+const uint8_t  MicroBitAnimationServiceAnimationStatusCharacteristicUUID[] = {
+    0xe9,0x5d,0x45,0x92,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
+};
+
+const uint8_t  MicroBitAnimationServiceAnimationControlCharacteristicUUID[] = {
+    0xe9,0x5d,0xb8,0x4c,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
+};