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Diffstat (limited to 'fpga/usrp3/lib/fifo/axis_fifo_monitor.v')
| -rw-r--r-- | fpga/usrp3/lib/fifo/axis_fifo_monitor.v | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/fpga/usrp3/lib/fifo/axis_fifo_monitor.v b/fpga/usrp3/lib/fifo/axis_fifo_monitor.v new file mode 100644 index 000000000..e3bb2c633 --- /dev/null +++ b/fpga/usrp3/lib/fifo/axis_fifo_monitor.v @@ -0,0 +1,66 @@ +// +// Copyright 2018 Ettus Research, a National Instruments Company +// +// SPDX-License-Identifier: LGPL-3.0-or-later +// +// Description: +// This module is instantiated in parallel with a FIFO with AXI4-STREAM interfaces. +// It tracks how many complete packets are contained within the FIFO, and also indicates +// when the first word of a packet is presented on the FIFO outputs. + +module axis_fifo_monitor #( + parameter COUNT_W = 32 +)( + // Clocks and resets + input wire clk, + input wire reset, + // FIFO Input + input wire i_tlast, + input wire i_tvalid, + input wire i_tready, + // FIFO Output + input wire o_tlast, + input wire o_tvalid, + input wire o_tready, + // FIFO Stats + output wire i_sop, + output wire i_eop, + output wire o_sop, + output wire o_eop, + output wire [COUNT_W-1:0] occupied, + output wire [COUNT_W-1:0] occupied_pkts +); + + wire [COUNT_W-1:0] i_pkt_count, o_pkt_count; + wire [COUNT_W-1:0] i_xfer_count, o_xfer_count; + + axis_strm_monitor #( + .WIDTH(1), .COUNT_W(COUNT_W), + .PKT_LENGTH_EN(0), .PKT_CHKSUM_EN(0), + .PKT_COUNT_EN(1), .XFER_COUNT_EN(1) + ) input_monitor ( + .clk(clk), .reset(reset), + .axis_tdata(1'b0), .axis_tlast(i_tlast), .axis_tvalid(i_tvalid), .axis_tready(i_tready), + .sop(i_sop), .eop(i_eop), + .pkt_length(), .pkt_chksum(), + .pkt_count(i_pkt_count), .xfer_count(i_xfer_count) + ); + + axis_strm_monitor #( + .WIDTH(1), .COUNT_W(COUNT_W), + .PKT_LENGTH_EN(0), .PKT_CHKSUM_EN(0), + .PKT_COUNT_EN(1), .XFER_COUNT_EN(1) + ) output_monitor ( + .clk(clk), .reset(reset), + .axis_tdata(1'b0), .axis_tlast(o_tlast), .axis_tvalid(o_tvalid), .axis_tready(o_tready), + .sop(o_sop), .eop(o_eop), + .pkt_length(), .pkt_chksum(), + .pkt_count(o_pkt_count), .xfer_count(o_xfer_count) + ); + + // Count packets in FIFO. + // No protection on counter wrap, + assign occupied = (i_xfer_count - o_xfer_count); + assign occupied_pkts = (i_pkt_count - o_pkt_count); + + endmodule
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