diff options
Diffstat (limited to 'usrp2/fifo')
| -rw-r--r-- | usrp2/fifo/packet_router.v | 48 |
1 files changed, 35 insertions, 13 deletions
diff --git a/usrp2/fifo/packet_router.v b/usrp2/fifo/packet_router.v index 6f1df6540..095dcd55d 100644 --- a/usrp2/fifo/packet_router.v +++ b/usrp2/fifo/packet_router.v @@ -91,30 +91,50 @@ module packet_router ); //////////////////////////////////////////////////////////////////// - // Communication output sink demuxer - // - demux the stream to serdes or ethernet + // Communication output sink crossbar + // - when the link is up (master): com -> eth and insp -> serdes + // - when the link is down (slave): com -> serdes (insp disconnected) //////////////////////////////////////////////////////////////////// wire eth_link_is_up = 1'b1; //TODO should come from input or register - //connect the ethernet output signals + //streaming signals from the inspector to the crossbar + wire [35:0] ser_crs_data; + wire ser_crs_valid; + wire ser_crs_ready; + + //connect the ethernet source output signals assign eth_out_data = com_out_data; - assign eth_out_valid = com_out_valid; + assign eth_out_valid = (eth_link_is_up)? com_out_valid : 1'b0; - //connect the serdes output signals - assign ser_out_data = com_out_data; - assign ser_out_valid = com_out_valid; + //connect the serdes source output signals + assign ser_out_data = (eth_link_is_up)? ser_crs_data : com_out_data; + assign ser_out_valid = (eth_link_is_up)? ser_crs_valid : com_out_valid; - //mux the com signal from the ethernet link + //connect the crossbar sink output signals assign com_out_ready = (eth_link_is_up)? eth_out_ready : ser_out_ready; + assign ser_crs_ready = (eth_link_is_up)? ser_out_ready : 1'b1/*null sink*/; //////////////////////////////////////////////////////////////////// // Communication output source combiner // - combine streams from dsp framer, com inspector, and cpu //////////////////////////////////////////////////////////////////// - //TODO: just connect com output to cpu output for now - assign com_out_data = cpu_inp_data; - assign com_out_valid = cpu_inp_valid; - assign cpu_inp_ready = com_out_ready; + + //streaming signals from the dsp framer to the com mux + wire [35:0] dsp_frm_data; + wire dsp_frm_valid; + wire dsp_frm_ready; + + //TODO: tmp connect to dsp inp until we make the framer + assign dsp_frm_data = dsp_inp_data; + assign dsp_frm_valid = dsp_inp_valid; + assign dsp_inp_ready = dsp_frm_ready; + + fifo36_mux com_output_source( + .clk(stream_clk), .reset(stream_rst), .clear(1'b0), + .data0_i(dsp_frm_data), .src0_rdy_i(dsp_frm_valid), .dst0_rdy_o(dsp_frm_ready), + .data1_i(cpu_inp_data), .src1_rdy_i(cpu_inp_valid), .dst1_rdy_o(cpu_inp_ready), + .data_o(com_out_data), .src_rdy_o(com_out_valid), .dst_rdy_i(com_out_ready) + ); //////////////////////////////////////////////////////////////////// // Interface CPU output to memory mapped wishbone @@ -268,7 +288,7 @@ module packet_router localparam COM_INSP_STATE_WRITE_LIVE = 3; localparam COM_INSP_DEST_DSP = 0; - localparam COM_INSP_DEST_COM = 1; + localparam COM_INSP_DEST_SER = 1; localparam COM_INSP_DEST_CPU = 2; localparam COM_INSP_MAX_NUM_DREGS = 12; //padded_eth + ip + udp + vrt_hdr @@ -315,11 +335,13 @@ module packet_router //Always connected output data lines. assign cpu_out_data = com_insp_out_data; assign dsp_out_data = com_insp_out_data; + assign ser_crs_data = com_insp_out_data; //Destination output valid signals: //Comes from inspector valid when destination is selected, and otherwise low. assign cpu_out_valid = (com_insp_dest == COM_INSP_DEST_CPU)? com_insp_out_valid : 1'b0; assign dsp_out_valid = (com_insp_dest == COM_INSP_DEST_DSP)? com_insp_out_valid : 1'b0; + assign ser_crs_valid = (com_insp_dest == COM_INSP_DEST_SER)? com_insp_out_valid : 1'b0; //The communication inspector ouput ready signal: //Always ready when storing to data registers, |