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VHDL-based SPI serial synchronous communication design as the design is the use of Quartus development environment to DE2 board as the hardware platform of the SPI synchronous serial communication. Facilitate the design process. According to both send and receive SPI implements the main part of the basic functions. In addition, the design also implements the baud rate generator, digital display features. DE2 board to achieve a circuit with a simple, short development cycle advantages. Full use of the EDA design advantages. Development Process VHDL hardware description language used to describe the design from the ground, sub-module, to fully enhance the designer' s concept of digital logic design.