基于FPGA的话机系统设计.doc

基于FPGA的话机系统设计 摘 要 以硬件描述语言（VHDL）FPGA话机系统设计正是在数字时钟的基础上添加了拨号功能、通话计时功能、一键拨号功能的一种创新性设计。 本系统设计以FPGA作为主控制器，通过编写VHDL语言来完成模块的设计。设计的模块主要包括：分频模块、消抖模块、转换模块、时间模块、计时模块、拨号模块、显示模块。经过QuartusⅡ软件编译仿真GW48-SOPC试验箱上进行结果验证FPGA，话机，模块,QuartusⅡ，控制 DESIGN OF THE PHONE SYSTEM BASED ON FPGA ABSTRACT Using hardware description language ( VHDL ) to design a digital clock has been more and more popular, but now it has no challenge for us, so how to add some new module based on it in order to achieve a new function becomes the significance of our study. The telephone system design Based on the FPGA is a kind of creative design based on the digital clock in added dial-up function, calling timing function, a key dial-up function. The design of this system is to use FPGA as the main controller, through the compilation of VHDL language to complete the module design. Design module mainly include: frequency division module, elimination Buffeting module, time module, timing module, dial-up module, displaying module. After the Quartus Ⅱ software compiled simulation, and the result is verified in GW48-SOPC test box, the system design achieves the basic function of telephone. In the process of design, we carried out a control key, dial, redial, display-switching function research. Control button design uses a key combination to solve the key problems of the experimental box; Dialing function design use pulse dialing mode, each pulse arrival achieve number of the input and shift left; Display switch is designed by adopting data selector means, controlling the output display according to enable different combination of key. The research results : the completion of the design of various functional modules, and the corresponding software simulation and hardware emulation, the basic realization of the time display, dialing, call timing, a redial function. KEY WORDS：VHDLFPGA, telephone, module, QuartusⅡ, control 目　录 前　言 1 第1章 绪 论 2 §1.1 选题的依据与意义 2 §1.2 选题背景 2 §1.2.1 课题相关技术的发展 2 §1.2.2 课题研究的必要性 3 第2章 FPGA及开发工具 4