Subversion Repositories ahb2wishbone

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//*****************************************************************************************************************
// Copyright (c) 2007 TooMuch Semiconductor Solutions Pvt Ltd.
//
//File name             :       ahb_wb_driver.svh       
//Designer              :       Sanjay kumar    
//Date                  :       3rd Aug'2007            
//Description           :       ahb_wb_driver:Class to receive packets from the tlm fifo and passed it to the 
//                              interface of the AHB to Wishbone bridge.                
//Revision              :       1.0
//*****************************************************************************************************************
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////

import avm_pkg::*;
import global::*;

class ahb_wb_driver extends avm_threaded_component;

// communication ports
avm_nonblocking_get_port #(ahb_req_pkt) request_port;
tlm_fifo #(ahb_req_pkt) fifo;

virtual ahb_wb_if pin_if;

        function new(string name ,avm_named_component parent);
                super.new(name,parent);
                request_port =new("request_port",this);
                fifo =new("fifo",this); 
                pin_if   =null;
        endfunction

task run;
        ahb_req_pkt req;
        ahb_res_pkt res;
        forever         
                begin
                        @(posedge pin_if.master_ab.hclk);
                                        if(pin_if.master_ab.hready && pin_if.master_ab.hresetn)
                                                begin
                                                        if(request_port.try_get(req))
                                                        write_to_bus(req);
                                                end
                end
endtask


// write data to bus
virtual task write_to_bus(input ahb_req_pkt req);
                #2      pin_if.master_ab.htrans=req.mode;
                        pin_if.master_ab.hwrite=req.wr;
                        pin_if.master_ab.haddr =req.adr;
                        pin_if.master_ab.hwdata=req.dat;
                        //avm_report_message("Driver:Packet on interface",global::convert2string(req));
endtask 

endclass