openusb_get_busid_list, openusb_free_busid_list -- Return all busids in the system, Free returned busidsopenusb_get_devids_by_bus, openusb_get_devids_by_vendor,
openusb_get_devids_by_class, openusb_free_devid_list -- Return all devids matching a pattern, Free returned devidsopenusb_get_device_data,openusb_free_device_data -- Get a device's data, Free the device dataopenusb_open_device,openusb_close_device -- Open/Close a deviceopenusb_get_devid -- Extract device ID from a device handleopenusb_get_lib_handle -- Extract openusb handle from a device handleopenusb_get_max_xfer_size -- Get the maximum data transfer size per request based on the bus
and type
openusb_get_configuration, openusb_set_configuration -- Get the current bConfigurationValue of a device,
Set a device's bConfigurationValueopenusb_claim_interface, openusb_release_interface,
openusb_is_interface_claimed -- Claim interface exclusively, Release an interface,
Check if an interface has been claimedopenusb_get_altsetting,openusb_set_altsetting -- Get alternate setting number, Set alternate settingopenusb_reset -- Reset deviceThis group of functions deal with the bus and device. Bus operations allows application to scan busses on a system. Device operations allows application to search for specific device, open and close those devices as well standard USB operations like setting the configuration, alternate settings, clearing halts and resetting the device. It also provides OS level operations such as claiming and releasing interfaces.