Ejemplo n.º 1
0
  /* package */ HidDevice(String path, Frontend frontend) throws IOException {
    m_Frontend = frontend;
    udev udev = udev_new();
    udev_device raw_dev = udev_device_new_from_syspath(udev, path);
    String dev_path = udev_device_get_devnode(raw_dev);
    udev_unref(udev);

    m_HidDeviceInfo = new HidDeviceInfo(path);
    // OPEN HERE //
    m_DeviceHandle = open(dev_path, O_RDWR);

    // If we have a good handle, return it.
    if (m_DeviceHandle <= 0) throw new IOException("open() failed, errno " + Native.getLastError());

    // Get the report descriptor
    int[] desc_size = {0};
    int res;
    hidraw_report_descriptor rpt_desc = new hidraw_report_descriptor();
    // Get Report Descriptor Size

    res = ioctl(m_DeviceHandle, HIDIOCGRDESCSIZE, desc_size);
    if (res < 0) // FIXME ERROR HANDLING
    throw new IOException("ioctl(...HIDIOCGRDESCSIZE..) failed"); // perror("HIDIOCGRDESCSIZE");

    // Get Report Descriptor
    rpt_desc.size = desc_size[0];
    res = ioctl(m_DeviceHandle, HIDIOCGRDESC, rpt_desc);
    if (res < 0) throw new IOException("ioctl(...HIDIOCGRDESC..) failed");
    // Determine if this device uses numbered reports.
    m_UsesNumberedReports = uses_numbered_reports(rpt_desc.value, rpt_desc.size);

    // ---------------

    // Magic here, assume that no HID device ever uses reports longer than 4kB
    m_InputReportBytes = new byte[4096 + 1];
    m_OutputReportBytes = new byte[4096 + 1];

    m_SyncStart = new SyncPoint(2);
    m_SyncShutdown = new SyncPoint(2);

    m_Thread =
        new Thread(
            new Runnable() {
              @Override
              public void run() {
                try {
                  runReadOnBackground();
                } catch (Exception e) {
                  e.printStackTrace();
                }
              }
            },
            m_HidDeviceInfo.getPath());
    m_Thread.start();
    m_SyncStart.waitAndSync();
  }
Ejemplo n.º 2
0
 @Override
 public synchronized void close() {
   if (!m_Open) throw new IllegalStateException("device not open");
   m_StopThread = true;
   UdevLibrary.close(m_DeviceHandle);
   m_Thread.interrupt();
   m_SyncShutdown.waitAndSync();
   m_Frontend.closeDevice(this);
   m_Open = false;
 }