subsurface/core/qt-ble.h
Jan Mulder d6b17fef08 OSTC over BLE: filter and track OSTC credit traffic
1) As the OSTC sends data to the BLE central role (the SSRF client) over 2
characteristics, we have to filter the administrative credit data from
the actual dive data that it received. The characteristcStateChanged
function is adapted for this.

2) We have to be sure that the Terminal Client I/O is fully defined during
opening the connecton to the OSTC. From 6d505b24f0c15 we can see
that the last step in setting up the terminal interface is the grant
of credits. This is done by writing to the proper (the only one, with
id = 0x2902) descriptor of the credits RX characteristic. The here
added slot is triggered on the completion of write of credits marking
the final stage of the setup.

Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
2017-07-04 23:46:07 +09:00

59 lines
1.9 KiB
C++

// SPDX-License-Identifier: GPL-2.0
#ifndef QT_BLE_H
#define QT_BLE_H
#include <QVector>
#include <QLowEnergyController>
#include <QEventLoop>
#define HW_OSTC_BLE_DATA_RX 0
#define HW_OSTC_BLE_DATA_TX 1
#define HW_OSTC_BLE_CREDITS_RX 2
#define HW_OSTC_BLE_CREDITS_TX 3
class BLEObject : public QObject
{
Q_OBJECT
public:
BLEObject(QLowEnergyController *c, dc_user_device_t *);
~BLEObject();
dc_status_t write(const void* data, size_t size, size_t *actual);
dc_status_t read(void* data, size_t size, size_t *actual);
//TODO: need better mode of selecting the desired service than below
inline QLowEnergyService *preferredService()
{ return services.isEmpty() ? nullptr : services[0]; }
public slots:
void addService(const QBluetoothUuid &newService);
void serviceStateChanged(QLowEnergyService::ServiceState s);
void characteristcStateChanged(const QLowEnergyCharacteristic &c, const QByteArray &value);
void characteristicWritten(const QLowEnergyCharacteristic &c, const QByteArray &value);
void writeCompleted(const QLowEnergyDescriptor &d, const QByteArray &value);
int setupHwTerminalIo(QList<QLowEnergyCharacteristic>);
private:
QVector<QLowEnergyService *> services;
QLowEnergyController *controller = nullptr;
QList<QByteArray> receivedPackets;
bool isCharacteristicWritten;
dc_user_device_t *device;
QList<QUuid> hwAllCharacteristics = {
"{00000001-0000-1000-8000-008025000000}", // HW_OSTC_BLE_DATA_RX
"{00000002-0000-1000-8000-008025000000}", // HW_OSTC_BLE_DATA_TX
"{00000003-0000-1000-8000-008025000000}", // HW_OSTC_BLE_CREDITS_RX
"{00000004-0000-1000-8000-008025000000}" // HW_OSTC_BLE_CREDITS_TX
};
};
extern "C" {
dc_status_t qt_ble_open(dc_custom_io_t *io, dc_context_t *context, const char *name);
dc_status_t qt_ble_read(dc_custom_io_t *io, void* data, size_t size, size_t *actual);
dc_status_t qt_ble_write(dc_custom_io_t *io, const void* data, size_t size, size_t *actual);
dc_status_t qt_ble_close(dc_custom_io_t *io);
}
#endif