diff options
| -rw-r--r-- | host/lib/usrp/x300/x300_io_impl.cpp | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/host/lib/usrp/x300/x300_io_impl.cpp b/host/lib/usrp/x300/x300_io_impl.cpp index 09ed1d705..9263c9b44 100644 --- a/host/lib/usrp/x300/x300_io_impl.cpp +++ b/host/lib/usrp/x300/x300_io_impl.cpp @@ -242,6 +242,8 @@ struct x300_tx_fc_guts_t boost::shared_ptr<x300_impl::async_md_type> old_async_queue; }; +#define X300_ASYNC_EVENT_CODE_FLOW_CTRL 0 + static size_t get_tx_flow_control_window(size_t frame_size, const device_addr_t& tx_args) { double hw_buff_size = tx_args.cast<double>("send_buff_size", X300_TX_HW_BUFF_SIZE); @@ -283,23 +285,28 @@ static void handle_tx_async_msgs(boost::shared_ptr<x300_tx_fc_guts_t> guts, zero return; } - //catch the flow control packets and react - if (endian_conv(packet_buff[if_packet_info.num_header_words32+0]) == 0) - { - const size_t seq = endian_conv(packet_buff[if_packet_info.num_header_words32+1]); - guts->seq_queue.push_with_haste(seq); - return; - } - //fill in the async metadata async_metadata_t metadata; load_metadata_from_buff( endian_conv, metadata, if_packet_info, packet_buff, clock->get_master_clock_rate(), guts->stream_channel); - guts->async_queue->push_with_pop_on_full(metadata); - metadata.channel = guts->device_channel; - guts->old_async_queue->push_with_pop_on_full(metadata); - standard_async_msg_prints(metadata); + + //The FC response and the burst ack are two indicators that the radio + //consumed packets. Use them to update the FC metadata + if (metadata.event_code == X300_ASYNC_EVENT_CODE_FLOW_CTRL or + metadata.event_code == async_metadata_t::EVENT_CODE_BURST_ACK + ) { + const size_t seq = metadata.user_payload[0]; + guts->seq_queue.push_with_pop_on_full(seq); + } + + //FC responses don't propagate up to the user so filter them here + if (metadata.event_code != X300_ASYNC_EVENT_CODE_FLOW_CTRL) { + guts->async_queue->push_with_pop_on_full(metadata); + metadata.channel = guts->device_channel; + guts->old_async_queue->push_with_pop_on_full(metadata); + standard_async_msg_prints(metadata); + } } static managed_send_buffer::sptr get_tx_buff_with_flowctrl( @@ -319,7 +326,9 @@ static managed_send_buffer::sptr get_tx_buff_with_flowctrl( } managed_send_buffer::sptr buff = xport->get_send_buff(timeout); - if (buff) guts->last_seq_out++; //update seq, this will actually be a send + if (buff) { + guts->last_seq_out++; //update seq, this will actually be a send + } return buff; } |