[SOLVED] Interface without endpoints?

[KWolfe81]

Any recommendations on how to add an interface without any endpoints? Need it to support some legacy software applications. I assume I'll need to be hacking up the device vendor class, but wanted to see if anyone had any pointers before I start.

[hathach]

For now you could implement your own driver using the usbd_app_driver_get_cb() callback, there is an example for doing so mentioned in the repo readme. For future, I will update the vendor driver to optionally accept 0 - 2 endpoints

[KWolfe81]

Thanks! I'll go ahead and do that. Modifying the existing Vendor Device code was straightforward enough - just literally commenting out the following in vendor_device.c. As always, thanks for a fantastic library.

  p_vendor->itf_num = itf_desc->bInterfaceNumber;

  // Prepare for incoming data
  if ( !usbd_edpt_xfer(rhport, p_vendor->ep_out, p_vendor->epout_buf, sizeof(p_vendor->epout_buf)) )
  {
    TU_LOG1_FAILED();
    TU_BREAKPOINT();
  }`