diff options
Diffstat (limited to 'host/lib/usrp/usrp2/usrp2_iface.cpp')
| -rw-r--r-- | host/lib/usrp/usrp2/usrp2_iface.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/host/lib/usrp/usrp2/usrp2_iface.cpp b/host/lib/usrp/usrp2/usrp2_iface.cpp index eaaa722ac..a21157d76 100644 --- a/host/lib/usrp/usrp2/usrp2_iface.cpp +++ b/host/lib/usrp/usrp2/usrp2_iface.cpp @@ -28,6 +28,18 @@ using namespace uhd; using namespace uhd::transport; +/*! + * FIXME: large timeout, ethernet pause frames... + * + * Use a large timeout to work-around the fact that + * flow-control may throttle outgoing control packets + * due to its use of ethernet pause frames. + * + * This will be fixed when host-based flow control is implemented, + * along with larger incoming send buffers using the on-board SRAM. + */ +static const size_t CONTROL_TIMEOUT_MS = 3000; //3 seconds + class usrp2_iface_impl : public usrp2_iface{ public: /*********************************************************************** @@ -164,7 +176,7 @@ public: boost::uint8_t usrp2_ctrl_data_in_mem[udp_simple::mtu]; //allocate max bytes for recv const usrp2_ctrl_data_t *ctrl_data_in = reinterpret_cast<const usrp2_ctrl_data_t *>(usrp2_ctrl_data_in_mem); while(true){ - size_t len = _ctrl_transport->recv(boost::asio::buffer(usrp2_ctrl_data_in_mem)); + size_t len = _ctrl_transport->recv(boost::asio::buffer(usrp2_ctrl_data_in_mem), CONTROL_TIMEOUT_MS); if(len >= sizeof(boost::uint32_t) and ntohl(ctrl_data_in->proto_ver) != USRP2_PROTO_VERSION){ throw std::runtime_error(str( boost::format("Expected protocol version %d, but got %d\n" |