/************************************************************************
 * file name:		producer.h
 * description:
 *
 * modification history
 * --------------------
 * 2003-7-7 19:32:19, created by zhuwei
 */ 

#ifndef _PRODUCER_H
#define _PRODUCER_H

/* includes----------------------------------------------------------- */
#include "systemc.h"
#include "config.h"
#include "zhuwei_debug.h"

/* defines------------------------------------------------------------ */
/* typedefs----------------------------------------------------------- */
struct producer: sc_module
{
	sc_in<bool> clk;
	sc_out<bool> reset, wen;
	sc_in<bool> fifo_full;
	sc_out<int>	dout;
	
	// internal variables
	int		count;
	
	// process function
	void write_fifo()
	{
		while(true)
		{
			wait();	
			
			if(reset.read() || fifo_full.read()) 
			{
				wen = false;
				continue;
			}
			
			assert(CLK_CYCLE > 2);

			wait(2, SC_NS);
			wen = true;
			dout = count++;
			
			wait(CLK_CYCLE-2, SC_NS);
			wen = false;
			dout = -1;
			
		}
	}

	void initial()
	{
		reset = 1;
		dout = -1;
		wait(CLK_CYCLE * 2, SC_NS);
		reset = 0;
	}

	// Constructor
	SC_CTOR(producer): count(0) 
	{
		SC_THREAD(write_fifo);
		sensitive_neg << clk;

		SC_THREAD(initial);
	}
};

/* externs------------------------------------------------------------ */
/* globals------------------------------------------------------------ */
/* forward declarations----------------------------------------------- */

#endif /* _PRODUCER_H */