//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//// ////
|
//// ////
|
//// Copyright (C) 2015 Authors and OPENCORES.ORG ////
|
//// Copyright (C) 2015 Authors and OPENCORES.ORG ////
|
//// ////
|
//// ////
|
//// This source file may be used and distributed without ////
|
//// This source file may be used and distributed without ////
|
//// restriction provided that this copyright statement is not ////
|
//// restriction provided that this copyright statement is not ////
|
//// removed from the file and that any derivative work contains ////
|
//// removed from the file and that any derivative work contains ////
|
//// the original copyright notice and the associated disclaimer. ////
|
//// the original copyright notice and the associated disclaimer. ////
|
//// ////
|
//// ////
|
//// This source file is free software; you can redistribute it ////
|
//// This source file is free software; you can redistribute it ////
|
//// and/or modify it under the terms of the GNU Lesser General ////
|
//// and/or modify it under the terms of the GNU Lesser General ////
|
//// Public License as published by the Free Software Foundation; ////
|
//// Public License as published by the Free Software Foundation; ////
|
//// either version 2.1 of the License, or (at your option) any ////
|
//// either version 2.1 of the License, or (at your option) any ////
|
//// later version. ////
|
//// later version. ////
|
//// ////
|
//// ////
|
//// This source is distributed in the hope that it will be ////
|
//// This source is distributed in the hope that it will be ////
|
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
|
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
|
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
|
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
|
//// PURPOSE. See the GNU Lesser General Public License for more ////
|
//// PURPOSE. See the GNU Lesser General Public License for more ////
|
//// details. ////
|
//// details. ////
|
//// ////
|
//// ////
|
//// You should have received a copy of the GNU Lesser General ////
|
//// You should have received a copy of the GNU Lesser General ////
|
//// Public License along with this source; if not, download it ////
|
//// Public License along with this source; if not, download it ////
|
//// from http://www.opencores.org/lgpl.shtml ////
|
//// from http://www.opencores.org/lgpl.shtml ////
|
//// ////
|
//// ////
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
|
|
module
|
module
|
axis_register_slice
|
axis_register_slice
|
#(
|
#(
|
N, // data bus width in bytes
|
N, // data bus width in bytes
|
I = 1, // TID width
|
I = 1, // TID width
|
D = 1, // TDEST width
|
D = 1, // TDEST width
|
U = 1, // TUSER width
|
U = 1, // TUSER width
|
USE_TSTRB = 0, // set to 1 to enable, 0 to disable
|
USE_TSTRB = 0, // set to 1 to enable, 0 to disable
|
USE_TKEEP = 0 // set to 1 to enable, 0 to disable
|
USE_TKEEP = 0 // set to 1 to enable, 0 to disable
|
)
|
)
|
(
|
(
|
axis_if axis_in,
|
axis_if axis_in,
|
axis_if axis_out,
|
axis_if axis_out,
|
input aclk,
|
input aclk,
|
input aresetn
|
input aresetn
|
);
|
);
|
|
|
// --------------------------------------------------------------------
|
// --------------------------------------------------------------------
|
//
|
//
|
localparam W = (N * 8) + (N * USE_TSTRB) + (N * USE_TKEEP) + I + D + U + 1;
|
localparam W = (N * 8) + (N * USE_TSTRB) + (N * USE_TKEEP) + I + D + U + 1;
|
|
|
|
|
// --------------------------------------------------------------------
|
// --------------------------------------------------------------------
|
//
|
//
|
wire wr_full;
|
wire wr_full;
|
wire [W-1:0] wr_data;
|
wire [W-1:0] wr_data;
|
wire wr_en;
|
wire wr_en;
|
|
|
wire rd_empty;
|
wire rd_empty;
|
wire [W-1:0] rd_data;
|
wire [W-1:0] rd_data;
|
wire rd_en;
|
wire rd_en;
|
|
|
defparam tiny_sync_fifo_i.W=W; // why are needed these for recursive modules?
|
defparam tiny_sync_fifo_i.W=W; // why are these needed for recursive modules?
|
tiny_sync_fifo
|
tiny_sync_fifo
|
// tiny_sync_fifo #(W)
|
// tiny_sync_fifo #(W)
|
tiny_sync_fifo_i(.clk(aclk), .reset(~aresetn), .*);
|
tiny_sync_fifo_i(.clk(aclk), .reset(~aresetn), .*);
|
|
|
|
|
// --------------------------------------------------------------------
|
// --------------------------------------------------------------------
|
//
|
//
|
generate
|
defparam axis_map_fifo_i.N=N; // why are these needed for recursive modules?
|
begin: assign_gen
|
defparam axis_map_fifo_i.I=I;
|
if(USE_TSTRB & USE_TKEEP)
|
defparam axis_map_fifo_i.D=D;
|
begin
|
defparam axis_map_fifo_i.U=U;
|
assign wr_data =
|
defparam axis_map_fifo_i.USE_TSTRB=USE_TSTRB;
|
{
|
defparam axis_map_fifo_i.USE_TKEEP=USE_TKEEP;
|
axis_in.tdata,
|
defparam axis_map_fifo_i.W=W;
|
axis_in.tlast,
|
axis_map_fifo
|
axis_in.tuser,
|
// #(
|
axis_in.tstrb,
|
// .N(N),
|
axis_in.tkeep
|
// .I(I),
|
};
|
// .D(D),
|
assign
|
// .U(U),
|
{
|
// .USE_TSTRB(USE_TSTRB),
|
axis_out.tdata,
|
// .USE_TKEEP(USE_TKEEP),
|
axis_out.tlast,
|
// .W(W)
|
axis_out.tuser,
|
// )
|
axis_out.tstrb,
|
axis_map_fifo_i(.*);
|
axis_out.tkeep
|
|
} = rd_data;
|
|
end
|
|
else if(USE_TSTRB)
|
|
begin
|
|
assign wr_data =
|
|
{
|
|
axis_in.tdata,
|
|
axis_in.tlast,
|
|
axis_in.tuser,
|
|
axis_in.tstrb
|
|
};
|
|
assign
|
|
{
|
|
axis_out.tdata,
|
|
axis_out.tlast,
|
|
axis_out.tuser,
|
|
axis_out.tstrb
|
|
} = rd_data;
|
|
end
|
|
else if(USE_TKEEP)
|
|
begin
|
|
assign wr_data =
|
|
{
|
|
axis_in.tdata,
|
|
axis_in.tlast,
|
|
axis_in.tuser,
|
|
axis_in.tkeep
|
|
};
|
|
assign
|
|
{
|
|
axis_out.tdata,
|
|
axis_out.tlast,
|
|
axis_out.tuser,
|
|
axis_out.tkeep
|
|
} = rd_data;
|
|
end
|
|
else
|
|
begin
|
|
assign wr_data =
|
|
{
|
|
axis_in.tdata,
|
|
axis_in.tlast,
|
|
axis_in.tuser
|
|
};
|
|
assign
|
|
{
|
|
axis_out.tdata,
|
|
axis_out.tlast,
|
|
axis_out.tuser
|
|
} = rd_data;
|
|
end
|
|
end
|
|
endgenerate
|
|
|
|
|
|
// --------------------------------------------------------------------
|
// --------------------------------------------------------------------
|
//
|
//
|
assign axis_in.tready = ~wr_full;
|
assign axis_in.tready = ~wr_full;
|
assign wr_en = axis_in.tvalid & ~wr_full;
|
assign wr_en = axis_in.tvalid & ~wr_full;
|
assign axis_out.tvalid = ~rd_empty;
|
assign axis_out.tvalid = ~rd_empty;
|
assign rd_en = axis_out.tready & ~rd_empty;
|
assign rd_en = axis_out.tready & ~rd_empty;
|
|
|
|
|
// --------------------------------------------------------------------
|
// --------------------------------------------------------------------
|
//
|
//
|
endmodule
|
endmodule
|
|
|
|
|
