altera_up_sync_fifo.v

RS232 Controller For Altera SOPC Builder and NIOS on DE2 kit board

/*****************************************************************************
 *                                                                           *
 * Module:       Altera_UP_SYNC_FIFO                                         *
 * Description:                                                              *
 *      This module is a FIFO with same clock for both reads and writes.     *
 *                                                                           *
 *****************************************************************************/

module Altera_UP_SYNC_FIFO (
	// Inputs
	clk,
	reset,

	write_en,
	write_data,

	read_en,
	
	// Bidirectionals

	// Outputs
	fifo_is_empty,
	fifo_is_full,
	words_used,

	read_data
);

/*****************************************************************************
 *                           Parameter Declarations                          *
 *****************************************************************************/

parameter	DATA_WIDTH	= 32;
parameter	DATA_DEPTH	= 128;
parameter	ADDR_WIDTH	= 7;

/*****************************************************************************
 *                             Port Declarations                             *
 *****************************************************************************/

// Inputs
input				clk;
input				reset;

input				write_en;
input		[DATA_WIDTH:1]	write_data;

input				read_en;

// Bidirectionals

// Outputs
output				fifo_is_empty;
output				fifo_is_full;
output		[ADDR_WIDTH:1]	words_used;

output		[DATA_WIDTH:1]	read_data;

/*****************************************************************************
 *                 Internal wires and registers Declarations                 *
 *****************************************************************************/

// Internal Wires

// Internal Registers

// State Machine Registers

/*****************************************************************************
 *                         Finite State Machine(s)                           *
 *****************************************************************************/


/*****************************************************************************
 *                             Sequential logic                              *
 *****************************************************************************/


/*****************************************************************************
 *                            Combinational logic                            *
 *****************************************************************************/


/*****************************************************************************
 *                              Internal Modules                             *
 *****************************************************************************/


scfifo	Sync_FIFO (
	// Inputs
	.clock			(clk),
	.sclr			(reset),

	.data			(write_data),
	.wrreq			(write_en),

	.rdreq			(read_en),

	// Bidirectionals

	// Outputs
	.empty			(fifo_is_empty),
	.full			(fifo_is_full),
	.usedw			(words_used),
	
	.q				(read_data)

	// Unused
	// synopsys translate_off
	,
	.aclr			(),
	.almost_empty	(),
	.almost_full	()
	// synopsys translate_on
);
defparam
	Sync_FIFO.add_ram_output_register	= "OFF",
	Sync_FIFO.intended_device_family	= "Cyclone II",
	Sync_FIFO.lpm_numwords				= DATA_DEPTH,
	Sync_FIFO.lpm_showahead				= "ON",
	Sync_FIFO.lpm_type					= "scfifo",
	Sync_FIFO.lpm_width					= DATA_WIDTH,
	Sync_FIFO.lpm_widthu				= ADDR_WIDTH,
	Sync_FIFO.overflow_checking			= "OFF",
	Sync_FIFO.underflow_checking		= "OFF",
	Sync_FIFO.use_eab					= "ON";

endmodule