Diff: source/bluetooth/MicroBitValueService.cpp

Revision:

74:06ddfe5ccbea

diff -r eb91bba49623 -r 06ddfe5ccbea source/bluetooth/MicroBitValueService.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/bluetooth/MicroBitValueService.cpp	Fri Nov 04 18:30:19 2022 +0000
@@ -0,0 +1,122 @@
+/*
+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.
+*/
+
+/**
+  * Class definition for the MicroBit BLE Magnetometer Service.
+  * Provides access to live magnetometer data via BLE, and provides basic configuration options.
+  */
+#include "MicroBitConfig.h"
+#include "ble/UUID.h"
+
+#include "MicroBitValueService.h"
+
+/**
+  * Constructor.
+  * Create a representation of the MagnetometerService.
+  * @param _ble The instance of a BLE device that we're running on.
+  * @param _compass An instance of MicroBitCompass to use as our Magnetometer source.
+  */
+MicroBitValueService::MicroBitValueService(BLEDevice &_ble, uint16_t *_value) :
+        ble(_ble), value(_value)
+{
+#if CONFIG_ENABLED(MICROBIT_DBG)
+    if(SERIAL_DEBUG) SERIAL_DEBUG->printf("MicroBitValueService::MicroBitValueService value = %i\r\n", *value);
+#endif
+    // Create the data structures that represent each of our characteristics in Soft Device.
+
+    GattCharacteristic  valueCharacteristic(MicroBitValueServiceDataUUID, (uint8_t *)&valueCharacteristicBuffer, 0,
+    sizeof(valueCharacteristicBuffer),
+    GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE);
+
+    // Initialise our characteristic values.
+    valueCharacteristicBuffer = *value;
+
+    // Set default security requirements
+    valueCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL);
+
+    GattCharacteristic *characteristics[] = {&valueCharacteristic};
+    GattService         service(MicroBitValueServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *));
+
+    ble.addService(service);
+
+    valueCharacteristicHandle = valueCharacteristic.getValueHandle();
+
+    ble.gattServer().write(valueCharacteristicHandle, (const uint8_t *)&valueCharacteristicBuffer, sizeof(valueCharacteristicBuffer));
+
+    ble.gattServer().onDataWritten(this, &MicroBitValueService::onDataWritten);
+
+    if (EventModel::defaultEventBus)
+    {
+        EventModel::defaultEventBus->listen(MICROBIT_ID_VALUE, MICROBIT_VALUE_EVT_UPDATE, this, &MicroBitValueService::valueUpdate, MESSAGE_BUS_LISTENER_IMMEDIATE);
+    }
+}
+
+/**
+  * Callback. Invoked when any of our attributes are written via BLE.
+  */
+void MicroBitValueService::onDataWritten(const GattWriteCallbackParams *params)
+{
+
+    if (params->handle == valueCharacteristicHandle && params->len >= sizeof(valueCharacteristicBuffer))
+    {
+        valueCharacteristicBuffer = *((uint16_t *)params->data);
+        *value = valueCharacteristicBuffer;
+        //MicroBitEvent e(41, MICROBIT_VALUE_EVT_UPDATE);
+    }
+}
+
+/**
+  * Magnetometer update callback
+  */
+void MicroBitValueService::valueUpdate(MicroBitEvent)
+{
+    
+#if CONFIG_ENABLED(MICROBIT_DBG)
+    if(SERIAL_DEBUG) SERIAL_DEBUG->printf("MicroBitValueService::valueUpdate\r\n");
+#endif
+
+    if (ble.getGapState().connected)
+    {
+        valueCharacteristicBuffer = *value;
+        ble.gattServer().write(valueCharacteristicHandle, (const uint8_t *)&valueCharacteristicBuffer, sizeof(valueCharacteristicBuffer));
+    }
+
+}
+
+const uint8_t  MicroBitValueServiceUUID[] = {
+    0xab,0x05,0xf2,0xd8,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
+};
+
+const uint8_t  MicroBitValueServiceDataUUID[] = {
+    0xab,0x05,0xfb,0x11,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
+};
+
+const uint8_t  MicroBitValueServicePeriodUUID[] = {
+    0xab,0x05,0x38,0x6c,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
+};
+
+const uint8_t  MicroBitValueServiceBearingUUID[] = {
+    0xab,0x05,0x97,0x15,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
+};
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