C++ (Cpp) usbNextDescriptor Exemples

Exemple #1

Fichier : usb_hid.c Projet : MarkMielke/brltty

const UsbHidDescriptor *
usbHidDescriptor (UsbDevice *device) {
  const UsbDescriptor *descriptor = NULL;

  while (usbNextDescriptor(device, &descriptor))
    if (descriptor->endpoint.bDescriptorType == UsbDescriptorType_HID)
      return &descriptor->hid;

  logMessage(LOG_WARNING, "USB: HID descriptor not found");
  errno = ENOENT;
  return NULL;
}

Exemple #2

Fichier : usb_cdc_acm.c Projet : hinderer/brltty

static const UsbInterfaceDescriptor *
usbFindCommunicationInterface (UsbDevice *device) {
  const UsbDescriptor *descriptor = NULL;

  while (usbNextDescriptor(device, &descriptor)) {
    if (descriptor->header.bDescriptorType == UsbDescriptorType_Interface) {
      if (descriptor->interface.bInterfaceClass == 0X02) {
        return &descriptor->interface;
      }
    }
  }

  logMessage(LOG_WARNING, "USB: communication interface descriptor not found");
  errno = ENOENT;
  return NULL;
}

Exemple #3

Fichier : usb.c Projet : Banzay40/brltty

unsigned int
usbAlternativeCount (
  UsbDevice *device,
  unsigned char interface
) {
  unsigned int count = 0;
  const UsbDescriptor *descriptor = NULL;

  while (usbNextDescriptor(device, &descriptor)) {
    if (descriptor->interface.bDescriptorType == UsbDescriptorType_Interface)
      if (descriptor->interface.bInterfaceNumber == interface)
        count += 1;
  }

  return count;
}

Exemple #4

Fichier : usb.c Projet : Banzay40/brltty

const UsbEndpointDescriptor *
usbEndpointDescriptor (
  UsbDevice *device,
  unsigned char endpointAddress
) {
  const UsbDescriptor *descriptor = NULL;

  while (usbNextDescriptor(device, &descriptor)) {
    if (descriptor->endpoint.bDescriptorType == UsbDescriptorType_Endpoint)
      if (descriptor->endpoint.bEndpointAddress == endpointAddress)
        return &descriptor->endpoint;
  }

  logMessage(LOG_WARNING, "USB: endpoint descriptor not found: %02X", endpointAddress);
  errno = ENOENT;
  return NULL;
}

Exemple #5

Fichier : usb.c Projet : Banzay40/brltty

const UsbInterfaceDescriptor *
usbInterfaceDescriptor (
  UsbDevice *device,
  unsigned char interface,
  unsigned char alternative
) {
  const UsbDescriptor *descriptor = NULL;

  while (usbNextDescriptor(device, &descriptor)) {
    if (descriptor->interface.bDescriptorType == UsbDescriptorType_Interface)
      if (descriptor->interface.bInterfaceNumber == interface)
        if (descriptor->interface.bAlternateSetting == alternative)
          return &descriptor->interface;
  }

  logMessage(LOG_WARNING, "USB: interface descriptor not found: %d.%d", interface, alternative);
  errno = ENOENT;
  return NULL;
}

Exemple #6

Fichier : usb_cdc_acm.c Projet : hinderer/brltty

static const UsbEndpointDescriptor *
usbFindInterruptInputEndpoint (UsbDevice *device, const UsbInterfaceDescriptor *interface) {
  const UsbDescriptor *descriptor = (const UsbDescriptor *)interface;

  while (usbNextDescriptor(device, &descriptor)) {
    if (descriptor->header.bDescriptorType == UsbDescriptorType_Interface) break;

    if (descriptor->header.bDescriptorType == UsbDescriptorType_Endpoint) {
      if (USB_ENDPOINT_DIRECTION(&descriptor->endpoint) == UsbEndpointDirection_Input) {
        if (USB_ENDPOINT_TRANSFER(&descriptor->endpoint) == UsbEndpointTransfer_Interrupt) {
          return &descriptor->endpoint;
        }
      }
    }
  }

  logMessage(LOG_WARNING, "USB: interrupt input endpoint descriptor not found");
  errno = ENOENT;
  return NULL;
}