axi_code/axi_seq.sv

//write sequence
class axi_wr_seq extends uvm_sequence #(axi_seq_item);
    	`uvm_object_utils(axi_wr_seq)

	seq_item txn;

    function new(string name="axi_wr_seq");
	    super.new(name);
    endfunction

    task body();
       txn=seq_item::type_id::create(txn);
       start_item(txn);
       assert(txn.randomize() with {txn.write==1;txn.awaddr==0x04;txn.wdata==0x2b1a;});
       finish_item(txn);
    endtask

endclass

//read sequence
class axi_rd_seq extends uvm_sequence #axi_(seq_item);
    	`uvm_object_utils(axi_rd_seq)

	seq_item txn;

    function new(string name="axi_rd_seq");
	    super.new(name);
    endfunction

    task body();
       txn=seq_item::type_id::create(txn);
       start_item(txn);
       assert(txn.randomize() with {txn.write==0;txn.araddr==0x04;});
       finish_item(txn);
    endtask

endclass

//unaligned sequence
class axi_rd_seq extends uvm_sequence #(axi_seq_item);
    	`uvm_object_utils(axi_rd_seq)

	seq_item txn;

    function new(string name="axi_rd_seq");
	    super.new(name);
    endfunction

    task body();
       txn=seq_item::type_id::create(txn);
      // if(txn.awaddr%2**awsize!=0)
      // begin
	       txn.aligned_addr.constraint_mode(0);
     //  end
       start_item(txn);
       assert(txn.randomize() with {txn.write==1;txn.awaddr==0x07;txn.awsize==3;});
       finish_item(txn);
    endtask

endclass


//locked  access sequence
class axi_locked_access_seq extends uvm_sequence #(axi_seq_item);
    	`uvm_object_utils(axi_locked_acess_seq)

	seq_item txn;

    function new(string name="axi_locked_access_seq");
	    super.new(name);
    endfunction

    task body();
      begin
       txn=seq_item::type_id::create(txn);
       start_item(txn);
       assert(txn.randomize() with {txn.write==1;txn.awaddr==0x04;txn.awlock==2'b10;txn.awid==01;});
       finish_item(txn);
      end

      begin
       txn=seq_item::type_id::create(txn);
       start_item(txn);
       assert(txn.randomize() with {txn.write==1;txn.awaddr==0x04;txn.awlock==2'b10;txn.awid==02;});
       finish_item(txn);
      end


    endtask

endclass



//write read sequence
class axi_rd_seq extends uvm_sequence #(axi_seq_item);
    	`uvm_object_utils(axi_rd_seq)

	seq_item txn;
	axi_wr_seq wr_seq;
        axi_rd_seq rd_seq;


    function new(string name="axi_rd_seq");
	    super.new(name);
    endfunction

    task body();
     begin
       txn=seq_item::type_id::create(txn);
       `uvm_do(wr_seq);
       `uvm_do(rd_seq);
     end
    endtask

endclass