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Add wrapper generator for axis_broadcast
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Alex Forencich
parent
da152a8546
commit
1f9aa62639
178
rtl/axis_broadcast_wrap.py
Executable file
178
rtl/axis_broadcast_wrap.py
Executable file
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#!/usr/bin/env python
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"""
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Generates an AXI Stream broadcast wrapper with the specified number of ports
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"""
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from __future__ import print_function
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import argparse
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import math
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from jinja2 import Template
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def main():
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parser = argparse.ArgumentParser(description=__doc__.strip())
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parser.add_argument('-p', '--ports', type=int, default=4, help="number of ports")
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parser.add_argument('-n', '--name', type=str, help="module name")
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parser.add_argument('-o', '--output', type=str, help="output file name")
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args = parser.parse_args()
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try:
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generate(**args.__dict__)
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except IOError as ex:
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print(ex)
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exit(1)
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def generate(ports=4, name=None, output=None):
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n = ports
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if name is None:
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name = "axis_broadcast_wrap_{0}".format(n)
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if output is None:
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output = name + ".v"
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print("Opening file '{0}'...".format(output))
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output_file = open(output, 'w')
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print("Generating {0} port AXI stream broadcast wrapper {1}...".format(n, name))
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cn = int(math.ceil(math.log(n, 2)))
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t = Template(u"""/*
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Copyright (c) 2018 Alex Forencich
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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// Language: Verilog 2001
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`timescale 1ns / 1ps
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/*
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* AXI4-Stream {{n}} port broadcast (wrapper)
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*/
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module {{name}} #
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(
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// Width of AXI stream interfaces in bits
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parameter DATA_WIDTH = 8,
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// Propagate tkeep signal
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parameter KEEP_ENABLE = (DATA_WIDTH>8),
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// tkeep signal width (words per cycle)
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parameter KEEP_WIDTH = (DATA_WIDTH/8),
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// Propagate tlast signal
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parameter LAST_ENABLE = 1,
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// Propagate tid signal
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parameter ID_ENABLE = 0,
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// tid signal width
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parameter ID_WIDTH = 8,
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// Propagate tdest signal
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parameter DEST_ENABLE = 0,
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// tdest signal width
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parameter DEST_WIDTH = 8,
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// Propagate tuser signal
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parameter USER_ENABLE = 1,
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// tuser signal width
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parameter USER_WIDTH = 1
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)
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(
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input wire clk,
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input wire rst,
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/*
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* AXI Stream input
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*/
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input wire [DATA_WIDTH-1:0] s_axis_tdata,
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input wire [KEEP_WIDTH-1:0] s_axis_tkeep,
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input wire s_axis_tvalid,
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output wire s_axis_tready,
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input wire s_axis_tlast,
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input wire [ID_WIDTH-1:0] s_axis_tid,
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input wire [DEST_WIDTH-1:0] s_axis_tdest,
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input wire [USER_WIDTH-1:0] s_axis_tuser,
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/*
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* AXI Stream outputs
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*/
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{%- for p in range(n) %}
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output wire [DATA_WIDTH-1:0] m{{'%02d'%p}}_axis_tdata,
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output wire [KEEP_WIDTH-1:0] m{{'%02d'%p}}_axis_tkeep,
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output wire m{{'%02d'%p}}_axis_tvalid,
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input wire m{{'%02d'%p}}_axis_tready,
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output wire m{{'%02d'%p}}_axis_tlast,
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output wire [ID_WIDTH-1:0] m{{'%02d'%p}}_axis_tid,
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output wire [DEST_WIDTH-1:0] m{{'%02d'%p}}_axis_tdest,
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output wire [USER_WIDTH-1:0] m{{'%02d'%p}}_axis_tuser{% if not loop.last %},{% endif %}
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{% endfor -%}
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);
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axis_broadcast #(
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.M_COUNT({{n}}),
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.DATA_WIDTH(DATA_WIDTH),
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.KEEP_ENABLE(KEEP_ENABLE),
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.KEEP_WIDTH(KEEP_WIDTH),
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.LAST_ENABLE(LAST_ENABLE),
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.ID_ENABLE(ID_ENABLE),
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.ID_WIDTH(ID_WIDTH),
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.DEST_ENABLE(DEST_ENABLE),
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.DEST_WIDTH(DEST_WIDTH),
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.USER_ENABLE(USER_ENABLE),
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.USER_WIDTH(USER_WIDTH)
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)
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axis_broadcast_inst (
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.clk(clk),
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.rst(rst),
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// AXI input
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.s_axis_tdata(s_axis_tdata),
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.s_axis_tkeep(s_axis_tkeep),
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.s_axis_tvalid(s_axis_tvalid),
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.s_axis_tready(s_axis_tready),
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.s_axis_tlast(s_axis_tlast),
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.s_axis_tid(s_axis_tid),
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.s_axis_tdest(s_axis_tdest),
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.s_axis_tuser(s_axis_tuser),
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// AXI outputs
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.m_axis_tdata({ {% for p in range(n-1,-1,-1) %}m{{'%02d'%p}}_axis_tdata{% if not loop.last %}, {% endif %}{% endfor %} }),
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.m_axis_tkeep({ {% for p in range(n-1,-1,-1) %}m{{'%02d'%p}}_axis_tkeep{% if not loop.last %}, {% endif %}{% endfor %} }),
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.m_axis_tvalid({ {% for p in range(n-1,-1,-1) %}m{{'%02d'%p}}_axis_tvalid{% if not loop.last %}, {% endif %}{% endfor %} }),
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.m_axis_tready({ {% for p in range(n-1,-1,-1) %}m{{'%02d'%p}}_axis_tready{% if not loop.last %}, {% endif %}{% endfor %} }),
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.m_axis_tlast({ {% for p in range(n-1,-1,-1) %}m{{'%02d'%p}}_axis_tlast{% if not loop.last %}, {% endif %}{% endfor %} }),
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.m_axis_tid({ {% for p in range(n-1,-1,-1) %}m{{'%02d'%p}}_axis_tid{% if not loop.last %}, {% endif %}{% endfor %} }),
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.m_axis_tdest({ {% for p in range(n-1,-1,-1) %}m{{'%02d'%p}}_axis_tdest{% if not loop.last %}, {% endif %}{% endfor %} }),
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.m_axis_tuser({ {% for p in range(n-1,-1,-1) %}m{{'%02d'%p}}_axis_tuser{% if not loop.last %}, {% endif %}{% endfor %} })
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);
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endmodule
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""")
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output_file.write(t.render(
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n=n,
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cn=cn,
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name=name
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))
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print("Done")
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if __name__ == "__main__":
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main()
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