Feature Request: Add libusb_open_device_with_vid_pid(libusb_context *ctx, uint16_t vendor_id, uint16_t product_id,uint16_t deviceIndex) function

[snikeguo]

libusb_open_device_with_vid_pid(ctx, usb_vid, usb_pid,0);
libusb_open_device_with_vid_pid(ctx, usb_vid, usb_pid,1);
This is more convenient.what do you think？

[mcuee]

The problem is what is deviceIndex defined.

[hjelmn]

I agree. There will be some degree of nondeterminism with the ordering of devices in the device list. You can always get the device list and run through it yourself.

[dickens]

Going to close this for now. The libusb_open_device_with_vid_pid() function is really meant for applications that want a simplified way of opening a specific device when there will only be one such device connected. As mentioned, there is too much non-determinism in how the devices are enumerated that the value of the proposed function is questionable.