diff --git a/axi_cov.sv b/axi_cov.sv
new file mode 100644
index 0000000..9b014c9
--- /dev/null
+++ b/axi_cov.sv
@@ -0,0 +1,46 @@
+class axi_cov extends uvm_subscriber#(axi_tx);
+axi_tx tx;
+`uvm_component_utils(axi_cov)
+
+covergroup axi_cg;
+	ADDR_CP : coverpoint tx.addr {
+		option.auto_bin_max = 8;
+	}
+	WR_RD_CP : coverpoint tx.wr_rd{
+		bins WR = {1'b1};
+		bins RD = {1'b0};
+	}
+	BURST_TYPE_CP : coverpoint tx.burst_type {
+		bins FIXED = {FIXED};
+		bins WRAP = {WRAP};
+		bins INCR = {INCR};
+	}
+	RESP_CP : coverpoint tx.resp {
+		bins OKAY = {OKAY};
+		bins EXOKAY = {EXOKAY};
+		bins SLVERR = {SLVERR};
+		bins DECERR = {DECERR};
+	}
+	ADDR_CP_X_WR_RD_CP : cross ADDR_CP, WR_RD_CP;
+	ADDR_CP_X_BURST_TYPE_CP : cross ADDR_CP, BURST_TYPE_CP;
+	ADDR_CP_X_RESP_CP : cross ADDR_CP, RESP_CP;
+	WR_RD_CP_X_BURST_TYPE_CP : cross WR_RD_CP, BURST_TYPE_CP;
+	WR_RD_CP_X_RESP_CP : cross WR_RD_CP, RESP_CP;
+	BURST_TYPE_CP_X_RESP_CP : cross BURST_TYPE_CP, RESP_CP;
+endgroup
+
+function new(string name = "", uvm_component parent=null);
+	super.new(name,parent);
+	axi_cg = new();
+endfunction
+
+function void write(T t);
+	$cast(tx, t);
+	$display("time : %0t", $time);
+	tx.print();
+	axi_cg.sample();
+endfunction
+
+endclass
+
+
diff --git a/axi_sqr.sv b/axi_sqr.sv
new file mode 100644
index 0000000..df03fa6
--- /dev/null
+++ b/axi_sqr.sv
@@ -0,0 +1,8 @@
+class axi_sqr extends uvm_sequencer #(axi_tx);
+`uvm_component_utils(axi_sqr)
+`NEW_COMP
+function void build_phase(uvm_phase phase);
+	super.build_phase (phase);
+endfunction
+
+endclass
diff --git a/axi_tx.sv b/axi_tx.sv
new file mode 100644
index 0000000..a69d8af
--- /dev/null
+++ b/axi_tx.sv
@@ -0,0 +1,43 @@
+class axi_tx extends uvm_sequence_item;
+rand bit wr_rd;
+rand bit [`ADDR_WIDTH-1:0] addr;
+rand bit [`WIDTH-1:0] dataQ[$]; //to support burst of data
+rand bit [3:0] burst_len;
+rand bit [2:0] burst_size;
+rand burst_type_t burst_type;
+rand bit [3:0] txid;
+bit [1:0] resp;
+bit [31:0] wrap_lower, wrap_upper;
+int tx_size;
+`uvm_object_utils_begin(axi_tx)
+	`uvm_field_int(addr, UVM_ALL_ON|UVM_NOPACK);
+	`uvm_field_queue_int(dataQ, UVM_ALL_ON|UVM_NOPACK);
+	`uvm_field_int(wr_rd, UVM_ALL_ON|UVM_NOPACK);
+	`uvm_field_int(burst_len, UVM_ALL_ON|UVM_NOPACK);
+	`uvm_field_int(burst_size, UVM_ALL_ON|UVM_NOPACK);
+	`uvm_field_enum(burst_type_t, burst_type, UVM_ALL_ON|UVM_NOPACK);
+	`uvm_field_int(txid, UVM_ALL_ON|UVM_NOPACK);
+	`uvm_field_int(wrap_lower, UVM_ALL_ON|UVM_NOPACK);
+	`uvm_field_int(wrap_upper, UVM_ALL_ON|UVM_NOPACK);
+`uvm_object_utils_end
+ 
+`NEW_OBJ
+function void post_randomize();
+	if (burst_type == WRAP) begin
+		tx_size = (burst_len+1) * (2**burst_size);
+		wrap_lower = addr - (addr%tx_size);
+		wrap_upper = wrap_lower + tx_size - 1;
+	end
+endfunction
+//constraint
+constraint dataQ_c{
+	dataQ.size() == burst_len+1;
+}
+constraint burst_type_c{
+	burst_type != RSVD_BT;
+}
+constraint wrap_aligned_c{
+  (burst_type) == WRAP -> (addr%(2**burst_size)==0);
+}
+endclass
+