简易计算器的制作以及设计毕业论文.doc

简易计算器的制作及设计毕业论文 目 录 摘 要 1 Abstract 2 第一章 绪论 3 1.1 开发背景 3 1.2 设计目的 4 第二章 方案论证与设计 5 2.1 设计指标 5 2.2 方案论证与设计 5 第三章 硬件模块介绍 8 3.1 主控及运算模块 8 3.2 显示模块 13 3.3 输入模块 16 第四章 软件设计 18 4.1 主程序的设计 18 4.2 键盘扫描的程序设计 19 4.3 显示模块程序设计 21 4.4 运算模块程序设计 23 第五章 仿真及调试 24 结束语 25 致 谢 26 参考文献 27 附录一：硬件实物图 28 附录二：系统程序 29 附录三：任务书 40 附录四：开题报告 42 附录五：外文原文与外文译文 47 基于AT89C51单片机的简易计算器的设计 摘 要 计算器在人们的日常中是较常见的电子产品之一。详细介绍了整个系统的硬件组成结构、工作原理和软件设计。Simple calculator designed based on AT89C51 Abstract The calculator in Peoples Daily life is one of the most common electronic products. Early computing calculator can only implement simple addition, subtraction, multiplication, and division, but now the scientific calculator which widely used by people’s functions are no longer stay, operation besides addition, subtraction, multiplication, and division, it can also power, prescribe, index, logarithmic, trigonometric function, inverse trigonometric function such as storage and computation. And the types of the calculator and pattern has also been gradually diversified, such as using solar calculator, using ASIC production calculator, using pure software design of the calculator and be integrated into mobile phones, tablets, and other electronic products in the calculator. We can say that calculators are under development and will also have very big development space, the future will appear more powerful calculators. Based on this idea, I design a simple calculator which use AT89C51 single-chip microcomputer as the core, and use the way that combine the hardware and software. The calculator use 4 * 4 matrix keyboard as input mode, it can carry out four signed several operations of addition,subtraction, multiplication, and division, and it display operation process on the LCD1602 . The paper introduces in detail the system structure, working principle of the hardware and the software design idea and process. key words： calculator AT89C51 LCD1602 matrix keyboard 绪论 1.1 开发背景 计算器是日常生活中比较常见的电子产品之一，它已在数十年间遍