Get the configuration descriptor for a specific configuration setting
#include <sys/usbdi.h> usbd_configuration_descriptor_t *usbd_configuration_descriptor( struct usbd_device *device, uint8_t cfg, struct usbd_desc_node **node );
libusbdi
The usbd_configuration_descriptor() function lets you obtain the configuration descriptor for a specific configuration setting.
The usbd_configuration_descriptor_t structure looks like this:
typedef struct usbd_configuration_descriptor { uint8_t bLength; uint8_t bDescriptorType; uint16_t wTotalLength; uint8_t bNumInterfaces; uint8_t bConfigurationValue; uint8_t iConfiguration; uint8_t bmAttributes; uint8_t MaxPower; } usbd_configuration_descriptor_t;
A pointer to usbd_configuration_descriptor_t on success, or NULL on error.
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |
usbd_args_lookup(), usbd_device_lookup(), usbd_device_extra(), usbd_device_descriptor(), usbd_endpoint_descriptor(), usbd_hcd_info(), usbd_hub_descriptor(), usbd_interface_descriptor(), usbd_languages_descriptor(), usbd_parse_descriptors(), usbd_string(), usbd_urb_status()