/////////////////////////////////////////////////////////////////////////                                                             ////////             LWB rev 1.2 -- BUS CHANGE FOR TWO SRAMS         ////////                                                             ////////                                                             ////////                 Author: Liu Tao                             ////////          liutao94@tsinghua.org.cn                           ////////                                                             ////////                                                             ////////                                                             /////////////////////////////////////////////////////////////////////////////                                                             //////// Copyright (C) 2003 Liu Tao                                  ////////               liutao94@tsinghua.org.cn                      ////////                                                             ////////                                                             /////////////////////////////////////////////////////////////////////////`timescale 1ns / 10psmodule LWBBUSCHANGE (EA_SRAM,CE_SRAM,OE_SRAM,WE_SRAM,ld,la,SRAM_CE_,SRAM_OE_,SRAM_WE_,SRAM_1_IN_ED,SRAM_2_IN_ED,toggle,ED_SRAM,SRAM_1_CE_,SRAM_1_OE_,SRAM_1_WE_,SRAM_1_EA,SRAM_1_O_ED,SRAM_1_OEN,SRAM_2_CE_,SRAM_2_OE_,SRAM_2_WE_,SRAM_2_EA,SRAM_2_O_ED,SRAM_2_OEN);	//=================================================================================	//input	//=================================================================================	    /*___________________________________________________ */		//from C6711 EMIF interface,DECODE		input [18:0] EA_SRAM;		input CE_SRAM;		input OE_SRAM;		input WE_SRAM;			    /*___________________________________________________ */		//from SAA7113 interface		input [7:0] ld;//data bus,to sram		input [18:0] la;//address bus,to sram		input SRAM_CE_;		input SRAM_OE_;		input SRAM_WE_;	    /*___________________________________________________ */		//from SRAM1		input [7:0] SRAM_1_IN_ED;	    /*___________________________________________________ */		//FROM SRAM2		input [7:0] SRAM_2_IN_ED;	    /*___________________________________________________ */		//from top logic control,toggle flag		input toggle;	//=================================================================================	//output	//=================================================================================	    /*___________________________________________________ */		//TO C6711 EMIF interface		output [7:0] ED_SRAM;	    /*___________________________________________________ */		//to SRAM1		output SRAM_1_CE_;//ce		output SRAM_1_OE_;//oe		output SRAM_1_WE_;//we		output [18:0] SRAM_1_EA;//address bus		output [7:0] SRAM_1_O_ED;//data bus output to sram		output SRAM_1_OEN;//data output enable	    /*___________________________________________________ */		//to SRAM1		output SRAM_2_CE_;//ce		output SRAM_2_OE_;//oe		output SRAM_2_WE_;//we		output [18:0] SRAM_2_EA;//address bus		output [7:0] SRAM_2_O_ED;//data bus output to sram		output SRAM_2_OEN;//data output enable	//=================================================================================	//assinging	//=================================================================================		//toggle =1 ,dsp EMIF interface connect to sram1,dsp read data from sram1		assign ED_SRAM = toggle ? SRAM_1_IN_ED : SRAM_2_IN_ED;		assign SRAM_1_O_ED = toggle ? 8'hzz : ld;		assign SRAM_1_OEN = toggle ? 1'b0 : 1'b1;		assign SRAM_1_EA = toggle ? EA_SRAM : la;		assign SRAM_1_CE_ = toggle ? CE_SRAM : SRAM_CE_;//toggle =1 ,output dsp to sram1;0,output saa7113 to sram1		assign SRAM_1_OE_ = toggle ? OE_SRAM : SRAM_OE_;		assign SRAM_1_WE_ = toggle ? WE_SRAM : SRAM_WE_;		 		//toggle =1 ,saa7113  interface connect to sram2,saa7113 write data to sram2		assign SRAM_2_O_ED = toggle ? ld : 8'hzz;		assign SRAM_2_OEN = toggle ? 1'b1 : 1'b0;		assign SRAM_2_EA = toggle ? la : EA_SRAM;		assign SRAM_2_CE_ = toggle ? SRAM_CE_: CE_SRAM ;//toggle =1 ,output SAA7113 to sram1;0,output DSP to sram1		assign SRAM_2_OE_ = toggle ? SRAM_OE_: OE_SRAM ;		assign SRAM_2_WE_ = toggle ? SRAM_WE_: WE_SRAM ;endmodule