117 lines
4.8 KiB
C++
117 lines
4.8 KiB
C++
/**
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* Class definition for the custom MicroBit Button Service.
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* Provides a BLE service to remotely read the state of each button, and configure its behaviour.
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*/
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#include "MicroBit.h"
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#include "ble/UUID.h"
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#include "MicroBitButtonService.h"
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/**
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* Constructor.
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* Create a representation of the ButtonService
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* @param _ble The instance of a BLE device that we're running on.
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*/
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MicroBitButtonService::MicroBitButtonService(BLEDevice &_ble) :
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ble(_ble)
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{
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// Create the data structures that represent each of our characteristics in Soft Device.
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GattCharacteristic buttonADataCharacteristic(MicroBitButtonAServiceDataUUID, (uint8_t *)&buttonADataCharacteristicBuffer, 0,
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sizeof(buttonADataCharacteristicBuffer), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
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GattCharacteristic buttonBDataCharacteristic(MicroBitButtonBServiceDataUUID, (uint8_t *)&buttonADataCharacteristicBuffer, 0,
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sizeof(buttonADataCharacteristicBuffer), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
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// Initialise our characteristic values.
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buttonADataCharacteristicBuffer = 0;
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buttonBDataCharacteristicBuffer = 0;
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// Set default security requirements
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buttonADataCharacteristic.requireSecurity(SecurityManager::SECURITY_MODE_ENCRYPTION_WITH_MITM);
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buttonBDataCharacteristic.requireSecurity(SecurityManager::SECURITY_MODE_ENCRYPTION_WITH_MITM);
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GattCharacteristic *characteristics[] = {&buttonADataCharacteristic, &buttonBDataCharacteristic};
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GattService service(MicroBitButtonServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *));
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ble.addService(service);
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buttonADataCharacteristicHandle = buttonADataCharacteristic.getValueHandle();
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buttonBDataCharacteristicHandle = buttonBDataCharacteristic.getValueHandle();
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ble.gattServer().write(buttonADataCharacteristicHandle,(uint8_t *)&buttonADataCharacteristicBuffer, sizeof(buttonADataCharacteristicBuffer));
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ble.gattServer().write(buttonBDataCharacteristicHandle,(uint8_t *)&buttonBDataCharacteristicBuffer, sizeof(buttonBDataCharacteristicBuffer));
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uBit.MessageBus.listen(MICROBIT_ID_BUTTON_A, MICROBIT_EVT_ANY, this, &MicroBitButtonService::buttonAUpdate, MESSAGE_BUS_LISTENER_IMMEDIATE);
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uBit.MessageBus.listen(MICROBIT_ID_BUTTON_B, MICROBIT_EVT_ANY, this, &MicroBitButtonService::buttonBUpdate, MESSAGE_BUS_LISTENER_IMMEDIATE);
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}
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/**
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* Button B update callback
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*/
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void MicroBitButtonService::buttonAUpdate(MicroBitEvent e)
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{
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if (ble.getGapState().connected)
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{
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if (e.value == MICROBIT_BUTTON_EVT_UP)
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{
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buttonADataCharacteristicBuffer = 0;
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ble.gattServer().notify(buttonADataCharacteristicHandle,(uint8_t *)&buttonADataCharacteristicBuffer, sizeof(buttonADataCharacteristicBuffer));
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}
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if (e.value == MICROBIT_BUTTON_EVT_DOWN)
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{
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buttonADataCharacteristicBuffer = 1;
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ble.gattServer().notify(buttonADataCharacteristicHandle,(uint8_t *)&buttonADataCharacteristicBuffer, sizeof(buttonADataCharacteristicBuffer));
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}
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if (e.value == MICROBIT_BUTTON_EVT_HOLD)
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{
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buttonADataCharacteristicBuffer = 2;
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ble.gattServer().notify(buttonADataCharacteristicHandle,(uint8_t *)&buttonADataCharacteristicBuffer, sizeof(buttonADataCharacteristicBuffer));
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}
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}
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}
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/**
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* Button A update callback
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*/
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void MicroBitButtonService::buttonBUpdate(MicroBitEvent e)
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{
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if (ble.getGapState().connected)
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{
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if (e.value == MICROBIT_BUTTON_EVT_UP)
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{
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buttonBDataCharacteristicBuffer = 0;
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ble.gattServer().notify(buttonBDataCharacteristicHandle,(uint8_t *)&buttonBDataCharacteristicBuffer, sizeof(buttonBDataCharacteristicBuffer));
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}
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if (e.value == MICROBIT_BUTTON_EVT_DOWN)
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{
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buttonBDataCharacteristicBuffer = 1;
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ble.gattServer().notify(buttonBDataCharacteristicHandle,(uint8_t *)&buttonBDataCharacteristicBuffer, sizeof(buttonBDataCharacteristicBuffer));
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}
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if (e.value == MICROBIT_BUTTON_EVT_HOLD)
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{
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buttonBDataCharacteristicBuffer = 2;
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ble.gattServer().notify(buttonBDataCharacteristicHandle,(uint8_t *)&buttonBDataCharacteristicBuffer, sizeof(buttonBDataCharacteristicBuffer));
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}
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}
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}
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const uint8_t MicroBitButtonServiceUUID[] = {
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0xe9,0x5d,0x98,0x82,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
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};
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const uint8_t MicroBitButtonAServiceDataUUID[] = {
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0xe9,0x5d,0xda,0x90,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
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}
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;
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const uint8_t MicroBitButtonBServiceDataUUID[] = {
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0xe9,0x5d,0xda,0x91,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
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};
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