/*! * Module:ibufgds * @file ibufgds.v * @date 2015-07-17 * @author Andrey Filippov * * @brief Wrapper for IBUFDS primitive * * @copyright Copyright (c) 2015 Elphel, Inc . * * License: * * ibufgds.v is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * ibufgds.v is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * * Additional permission under GNU GPL version 3 section 7: * If you modify this Program, or any covered work, by linking or combining it * with independent modules provided by the FPGA vendor only (this permission * does not extend to any 3-rd party modules, "soft cores" or macros) under * different license terms solely for the purpose of generating binary "bitstream" * files and/or simulating the code, the copyright holders of this Program give * you the right to distribute the covered work without those independent modules * as long as the source code for them is available from the FPGA vendor free of * charge, and there is no dependence on any encrypted modules for simulating of * the combined code. This permission applies to you if the distributed code * contains all the components and scripts required to completely simulate it * with at least one of the Free Software programs. */ `timescale 1ns/1ps /*Quote from Xilinx "7 Series FPGA SelectIO Primitives": The IBUFDS and IBUFGDS primitives are the same, IBUFGDS is used when an differential input buffer is used as a clock input. Actually, it still complains: WARNING: [DRC 23-20] Rule violation (CKLD-2) Clock Net has direct IO Driver - Clock net clocks393_i/ibufds_ibufgds0_i/ffclk0 is directly driven by an IO rather than a Clock Buffer. Driverx393.s: clocks393_i/ibufds_ibufgds0_i/IBUFDS_i/O[VivadoPlace:0000] */ module ibufgds #( parameter CAPACITANCE = "DONT_CARE", parameter DIFF_TERM = "FALSE", // parameter DQS_BIAS = "FALSE", // parameter IBUF_DELAY_VALUE = "0", parameter IBUF_LOW_PWR = "TRUE", // parameter IFD_DELAY_VALUE = "AUTO", parameter IOSTANDARD = "DEFAULT" )( output O, input I, input IB ); IBUFGDS #( .CAPACITANCE (CAPACITANCE), .DIFF_TERM (DIFF_TERM), // .DQS_BIAS (DQS_BIAS), // .IBUF_DELAY_VALUE (IBUF_DELAY_VALUE), .IBUF_LOW_PWR (IBUF_LOW_PWR), // .IFD_DELAY_VALUE (IFD_DELAY_VALUE), .IOSTANDARD (IOSTANDARD) ) IBUFGDS_i ( .O (O), // output .I (I), // input .IB (IB) // input ); endmodule