Get information on the USB host controller and DDK library
#include <sys/usbdi.h> int usbd_hcd_ext_info( struct usbd_connection *connection, uint32_t cindex, usbd_hcd_info_t *info ); int usbd_hcd_info( struct usbd_connection *connection, usbd_hcd_info_t *info );
libusbdi
You can use the usbd_hcd_ext_info() or usbd_hcd_info() function to obtain information from the USB host controller and DDK library.
If your system has more than one USB chip, you can call usbd_hcd_ext_info() to get information about a specific one. The usbd_hcd_info() function gets information about the first USB chip; calling it is the same as calling usbd_hcd_ext_info() with a cindex argument of 0.
The usbd_hcd_info_t structure is defined as follows:
typedef struct usbd_hcd_info { uint16_t vusb; uint16_t vusbd; char controller[8]; uint32_t capabilities; uint8_t ndev; uint8_t cindex; uint16_t vhcd; uint32_t max_td_io; uint8_t reserved[12]; } usbd_hcd_info_t;
It contains at least the following:
Safety: | |
---|---|
Cancellation point | Yes |
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_hub_descriptor(), usbd_interface_descriptor(), usbd_languages_descriptor(), usbd_parse_descriptors(), usbd_string(), usbd_urb_status()