Subversion Repositories ahb2wishbone

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////

//*****************************************************************************************************************

// Copyright (c) 2007 TooMuch Semiconductor Solutions Pvt Ltd.

//

//File name             :       ahb_wb_stim_gen.svh

//Designer              :       Sanjay kumar

//Date                  :       3rd Aug'2007

//Description           :       ahb_wb_stim_gen:Class to generata write and read packet with wait state by master.

//Revision              :       1.0

//*****************************************************************************************************************

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////

import avm_pkg::*;

import global::*;

class ahb_wb_stim_gen extends avm_named_component;

// communication port

avm_blocking_put_port#( ahb_req_pkt) initiator_port;

tlm_fifo #(ahb_req_pkt) fifo;

        function new(string name ,avm_named_component parent);

                super.new(name,parent);

                initiator_port=new("initiatot_port",this);

                fifo =new("fifo",this);

        endfunction

task stimulus(input int count= 45);

        ahb_req_pkt p;

        //(write operation) write data and addr. to fifo

                for(int i=0; i

                begin

                        if(i>15 && i<21)// busy  mode

                                begin

                                p.mode='b01;

                                p.wr='b1;

                                end

                        else if(i>26 && i<31) // idle mode

                                begin

                                p.mode='b00;

                                p.wr='b1;

                                end

                        else if(i>30 && i<36) // Sequential mode

                                begin

                                p.mode='b11;

                                p.wr='b1;

                                end

                        else    // Non sequential mode

                                begin

                                p.mode='b10;

                                p.adr=$random;

                                p.dat=$random;

                                p.wr='b1;

                                end

                write_to_pipe(p);

                end

        //(read operation) write address to fifo for read

                for(int i=0; i

                begin

                        if(i>10 && i<16) // busy mode

                                begin

                                p.mode='b01;

                                p.wr='b0;

                                end

                        else if(i>20 && i<26) // idle mode

                                begin

                                p.mode='b00;

                                p.wr='b0;

                                end

                        else if(i>25 && i<31) // Sequential mode

                                begin

                                p.mode='b11;

                                p.wr='b0;

                                end

                        else //Non Sequential mode

                                begin

                                p.mode='b10;

                                p.adr=$random;

                                p.wr='b0;

                                end

                write_to_pipe(p);

                end

        // write operation

                for(int i=0; i<(count-30) ;i++)

                begin

                        if(i>=0 && i<(count-30))

                                begin

                                p.mode='b10;

                                p.adr=$random;

                                p.dat=$random;

                                p.wr='b1;

                                end

                write_to_pipe(p);

                end

endtask

// task to push transaction in the fifo

task write_to_pipe(ahb_req_pkt p);

                initiator_port.put(p);

               //avm_report_message("Stim_gen: Packet pushed into fifo",global::convert2string(p));

endtask

endclass