jtag_libusb_choose_interface() function

Find the first interface optionally matching class, subclass and protocol and claim it.

Syntax

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Summary

Declaration

Definition

int jtag_libusb_choose_interface(struct libusb_device_handle *devh, unsigned int *usb_read_ep, unsigned int *usb_write_ep, int bclass, int subclass, int protocol, int trans_type);

Argument

Description

devh

_libusb_ device handle.

usb_read_ep

A pointer to a variable where the _IN_ endpoint number will be stored.

usb_write_ep

A pointer to a variable where the _OUT_ endpoint number will be stored.

bclass

`bInterfaceClass` to match, or -1 to ignore this field.

subclass

`bInterfaceSubClass` to match, or -1 to ignore this field.

protocol

`bInterfaceProtocol` to match, or -1 to ignore this field.

trans_type

`bmAttributes Bits 0..1 Transfer type` to match, or -1 to ignore this field.

Returns ERROR_OK on success, ERROR_FAIL otherwise.

from examples