基于FPGA自动售货机控制系统设计毕业论文.docx

基于FPGA的自动售货机控制系统设计摘要本毕业设计是在Altera公司EP1C3T144C8型FPGA为核心的LP-2900开发装置上通过原理图以及VHDL语言分别实现自动售货机控制系统的设计和仿真。其中，基于原理图的设计方案主要通过计数器、加法器、数值比较器在逻辑上实现自动售货机的控制。对于VHDL语言方案，主要通过各类选择语句以及条件判断语句实现自动售货机控制系统。两个设计都可以归于各个模块的设计和组合，主要分为投币模块，找零模块，显示模块和分频模块。各个模块之间通过各个信号相互连接并相互决定启动顺序。该售货机控制系统能够识别三种硬币，并且提供四种价格不同的货物供选择，七段数码管显示投入硬币的总额和购买之后以及找零过程中的余额，并且在退币过程中有LED以及蜂鸣器的提示，自动售货机系统还具备了取消购买的功能，一旦执行则直接开始退币。基于FPGA的自动售货机设计，具有开发周期短、硬件运行速度快、成本较低以及稳定性较高等优势。关键词：自动售货机，VHDL，原理图，FPGA，LP—2900THE DESIGN OF VENDING MACHINE CONTROL SYSTEM BASED ON FPGAABSTRACTA vending machine control system has been designed use schematics and VHDL language in this work. The system has also been simulated on LP-2900 development platform based on EP1C3T144C8 FPGA of Altera. Schematics design was used for the control logic of the vending machine by counters, adds and value comparators. While the VHDL language was applicated by its flexible selection and condional instructions. The two methods were both designed and assembled by modules, including coin inserter, money changer, display, and frenquency devider. Every module could communicate with and call for others by signals. The vending machine control system is capable of 3 different coins and 4 merchandises in different price. Total coins inserted and balance are shown on the 7-seg LED display, and a LED and a buzzer would be warned when changing back coins. The system is also able to cancle the purchasing by giving back all the coins as soon as requested. The vending machine based on FPGA has certain advantages in shorter development period, higher speed software running, lower cost, and more stable performence.Key words:Vending machines, VHDL,schematic diagram, FPGA, LP-2900绪论引言作为一种全新的消费和购物方式，自动售货机于20世纪70年代末，在欧美和日本地区逐渐兴起。经过短时间的发展，现如今自动售货机成为了世界范围内，商品零售的主要方式之一。支持其发展如此迅速的原因便是其便捷的购物方式以及24小时不间断的服务。本文是在设计基于FPGA的自动售货机控制系统课程设计下实现自动售货机的基本功能的研究报告，大致介绍了EDA技术以及其发展的历史、Altera公司的开发工具、FPGA的应用，以及原理图和VHDL语言的特点和用法。EDA技术的产生、发展和展望伴随着计算机、集成电路以及电子系统设计的发展，EDA技术已经现代电子设计的核心。其发展融合了应用电子技术、智能技术、计算机图形学以及计算及数学