pluto_hdl_adi/library/common/ad_lvds_out.v

169 lines
5.1 KiB
Verilog

// ***************************************************************************
// ***************************************************************************
// Copyright 2014(c) Analog Devices, Inc.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
// - Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// - Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in
// the documentation and/or other materials provided with the
// distribution.
// - Neither the name of Analog Devices, Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
// - The use of this software may or may not infringe the patent rights
// of one or more patent holders. This license does not release you
// from the requirement that you obtain separate licenses from these
// patent holders to use this software.
// - Use of the software either in source or binary form, must be run
// on or directly connected to an Analog Devices Inc. component.
//
// THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED.
//
// IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY
// RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
`timescale 1ns/100ps
module ad_lvds_out (
// data interface
tx_clk,
tx_data_p,
tx_data_n,
tx_data_out_p,
tx_data_out_n,
// delay-data interface
up_clk,
up_dld,
up_dwdata,
up_drdata,
// delay-cntrl interface
delay_clk,
delay_rst,
delay_locked);
// parameters
parameter DEVICE_TYPE = 0;
parameter IODELAY_ENABLE = 0;
parameter IODELAY_CTRL = 0;
parameter IODELAY_GROUP = "dev_if_delay_group";
localparam SERIES7 = 0;
localparam VIRTEX6 = 1;
// data interface
input tx_clk;
input tx_data_p;
input tx_data_n;
output tx_data_out_p;
output tx_data_out_n;
// delay-data interface
input up_clk;
input up_dld;
input [ 4:0] up_dwdata;
output [ 4:0] up_drdata;
// delay-cntrl interface
input delay_clk;
input delay_rst;
output delay_locked;
// internal signals
wire tx_data_oddr_s;
wire tx_data_odelay_s;
// delay controller
generate
if ((IODELAY_ENABLE == 1) && (DEVICE_TYPE == SERIES7) && (IODELAY_CTRL == 1)) begin
(* IODELAY_GROUP = IODELAY_GROUP *)
IDELAYCTRL i_delay_ctrl (
.RST (delay_rst),
.REFCLK (delay_clk),
.RDY (delay_locked));
end else begin
assign delay_locked = 1'b1;
end
endgenerate
// transmit data interface, oddr -> odelay -> obuf
ODDR #(
.DDR_CLK_EDGE ("SAME_EDGE"),
.INIT (1'b0),
.SRTYPE ("ASYNC"))
i_tx_data_oddr (
.CE (1'b1),
.R (1'b0),
.S (1'b0),
.C (tx_clk),
.D1 (tx_data_p),
.D2 (tx_data_n),
.Q (tx_data_oddr_s));
generate
if ((IODELAY_ENABLE == 1) && (DEVICE_TYPE == SERIES7)) begin
(* IODELAY_GROUP = IODELAY_GROUP *)
ODELAYE2 #(
.CINVCTRL_SEL ("FALSE"),
.DELAY_SRC ("ODATAIN"),
.HIGH_PERFORMANCE_MODE ("FALSE"),
.ODELAY_TYPE ("VAR_LOAD"),
.ODELAY_VALUE (0),
.REFCLK_FREQUENCY (200.0),
.PIPE_SEL ("FALSE"),
.SIGNAL_PATTERN ("DATA"))
i_tx_data_odelay (
.CE (1'b0),
.CLKIN (1'b0),
.INC (1'b0),
.LDPIPEEN (1'b0),
.CINVCTRL (1'b0),
.REGRST (1'b0),
.C (up_clk),
.ODATAIN (tx_data_oddr_s),
.DATAOUT (tx_data_odelay_s),
.LD (up_dld),
.CNTVALUEIN (up_dwdata),
.CNTVALUEOUT (up_drdata));
end else begin
assign up_drdata = 5'd0;
assign tx_data_odelay_s = tx_data_oddr_s;
end
endgenerate
OBUFDS i_tx_data_obuf (
.I (tx_data_odelay_s),
.O (tx_data_out_p),
.OB (tx_data_out_n));
endmodule
// ***************************************************************************
// ***************************************************************************