OVM Monitor example for Memory DUT :

`ifndef __MEM_TRANSFER__
`define __MEM_TRANSFER__

// mem read write enum

typedef enum {
                READ,
                WRITE
} mem_read_write_enum;

class mem_transfer extends ovm_sequence_item;

    rand mem_read_write_enum read_write;
    
    rand bit [`ADDR_SIZE-1:0] addr;
    rand bit [`DATA_SIZE-1:0] data;

    rand bit [`DATA_SIZE-1:0] write_enable;
    rand bit chip_enable;

    rand int unsigned size;

    constraint c_size {
        size inside {1, 2, 4, 8};
    }

    constraint c_chip_enable {
        chip_enable == 0;
    }

    // Register fields with OVM

    `ovm_object_utils_begin (mem_transfer) 
        `ovm_field_int      (addr,           OVM_ALL_ON)
        `ovm_field_int      (data,           OVM_ALL_ON)
        `ovm_field_int      (size,           OVM_ALL_ON)
        `ovm_field_enum     (mem_read_write_enum, read_write,          OVM_ALL_ON)
    `ovm_object_utils_end


    // Class Constructor 
    function new (string name="mem_transfer_inst") ;
        super.new (name);
    endfunction : new 

    
endclass : mem_transfer 


`endif //__MEM_TRANSFER__

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