Re: please help me
Some confusions you may have:
1) Either VHDL or Verilog HDL is just a kind of Hardware Description Language which is used to DESCRIBE your hardware designs. It's not a physical logic device althought you can synthesize your HDL codes to implement a logic device on FPGA or even an ASIC.
2) Theoretically you can describe any logic with HDL, so the most important thing you have to clearify when you want to interface MCU with FPGA/CPLD is the communication protocal between MCU and FPGA/CPLD. In other word, you should have a specification, either a standard one defined by other people/organization or some simple but sufficient one defined by yourself. These kind of specifications usually consists of a group of handshaking signals and their timing. You may find some on peripheral interface chips' datasheet as a reference.