//======================================================================
//
// eim_da_phy.v
// ------------
// IO buffer module for the EIM DA port.
//
//
// Author: Pavel Shatov
// Copyright (c) 2014, NORDUnet A/S 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 the NORDUnet nor the names of its contributors may
//   be used to endorse or promote products derived from this software
//   without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, 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.
//
//======================================================================

module eim_da_phy
	(
		buf_io,
		buf_di, buf_ro,
		buf_t
	);

		//
		// Parameters
		//
	parameter BUS_WIDTH = 16;

		//
		// Ports
		//
	inout		wire	[BUS_WIDTH-1:0]	buf_io;	// connect directly to top-level pins
	input		wire	[BUS_WIDTH-1:0]	buf_di;	// drive input (value driven onto pins)
	output	wire	[BUS_WIDTH-1:0]	buf_ro;	// receiver output (value read from pins)
	input		wire							buf_t;	// tristate control (driver is disabled during tristate)

		//
		// IOBUFs
		//
	genvar i;
	generate for (i=0; i<BUS_WIDTH; i=i+1)
		begin: eim_da
			//
			IOBUF #
			(
				.IOSTANDARD		("LVCMOS33"),
				.DRIVE			(12),
				.SLEW				("FAST")
			)
			IOBUF_inst
			(
				.IO	(buf_io[i]),
				.O		(buf_ro[i]),
				.I		(buf_di[i]),
				.T		(buf_t)
			);
			//
		end
	endgenerate

endmodule

//======================================================================
// EOF eim_da_phy.v
//======================================================================