diff options
| -rw-r--r-- | host/lib/usrp/b100/b100_impl.cpp | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/host/lib/usrp/b100/b100_impl.cpp b/host/lib/usrp/b100/b100_impl.cpp index 20933a2fe..19df3d6af 100644 --- a/host/lib/usrp/b100/b100_impl.cpp +++ b/host/lib/usrp/b100/b100_impl.cpp @@ -188,12 +188,27 @@ b100_impl::b100_impl(const device_addr_t &device_addr){ ctrl_xport_args["send_frame_size"] = "512"; ctrl_xport_args["num_send_frames"] = "16"; - _ctrl_transport = usb_zero_copy::make( - handle, - 4, 8, //interface, endpoint - 3, 4, //interface, endpoint - ctrl_xport_args - ); + //try to open ctrl transport + //this could fail with libusb_submit_transfer under some conditions + try{ + _ctrl_transport = usb_zero_copy::make( + handle, + 4, 8, //interface, endpoint + 3, 4, //interface, endpoint + ctrl_xport_args + ); + } + //try reset once in the case of failure + catch(const uhd::exception &ex){ + if (initialization_count > 1) throw; + UHD_MSG(warning) << + "The control endpoint was left in a bad state.\n" + "Attempting endpoint re-enumeration...\n" << ex.what() << std::endl; + _fifo_ctrl.reset(); + _ctrl_transport.reset(); + _fx2_ctrl->usrp_fx2_reset(); + goto b100_impl_constructor_begin; + } this->enable_gpif(true); //////////////////////////////////////////////////////////////////// |