Get the hub descriptor for a specific (hub) device
#include <sys/usbdi.h> usbd_hub_descriptor_t *usbd_hub_descriptor( struct usbd_device *device, struct usbd_desc_node **node );
libusbdi
The usbd_hub_descriptor() function lets you obtain a hub descriptor.
The usbd_hub_descriptor_t data structure looks like this:
typedef struct usbd_hub_descriptor { uint8_t bLength; uint8_t bDescriptorType; uint8_t bNbrPorts; uint16_t wHubCharacteristics; uint8_t bPwrOn2PwrGood; uint8_t bHubContrCurrent; uint8_t DeviceRemovable[1]; uint8_t PortPwrCtrlMask[1]; } usbd_hub_descriptor_t;
A pointer to usbd_hub_descriptor_t on success, or NULL on error.
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |
usbd_args_lookup(), usbd_configuration_descriptor(), usbd_device_lookup(), usbd_device_extra(), usbd_device_descriptor(), usbd_endpoint_descriptor(), usbd_hcd_info(), usbd_interface_descriptor(), usbd_languages_descriptor(), usbd_parse_descriptors(), usbd_string(), usbd_urb_status()