摘要本设计是基于 ARM cortex M-3 架构的实时时钟显示设计，可以显示年月日时分秒及周信息，具有可调整日期和时间功能，也具有显示周围温度的功能。在设 计的同时，对 ARM cortex M-3 架构做了一定的介绍，也详细介绍了本设计所用到 的硬件和开发工具。68517

实时时钟的设计过程在硬件与软件方面进行同步设计。硬件部分主要由 lm3s8962 处理器，ds1388 计时器，ds18b20 温度计，LED12864 显示电路，以及调 时按键电路等组成，系统通过 12864LED 显示时间和温度，所以具有人性化的操作 和比较美观的显示效果。软件方面主要包括时钟程序、键盘程序，显示程序，读 取温度程序等。本系统用 c 语言开发，为了便于以后的扩展和更改，软件的设计 采用模块化结构，主要分为四个模块。使程序设计的逻辑关系更加简洁，让人一 目了然，以便更简单地实现调整时间及日期显示功能。本次设计所使用的开发工 具是 Keil，用于程序的调试和编译，编译完成后，下载到 lm3s8962 处理器进行 仿真。

毕业论文关键词  ARM cortex-M3 lm3s8962 实时时钟 万年历

Abstract

The design is based on ARM cortex M-3 architecture , real-time clock display designed to display year, months, date, clock, minute, second and weekly information , with adjustable date and time functions, and the design involves the function of ambient temperature display too. In the design, while some introduction is done on the ARM cortex M-3 architecture, but also details of the hardware used in the design and development tools is introduced specifically.

The design process of real-time clock to synchronize the hardware and software aspects of the design . The hardware part is mainly composed lm3s8962 processor , ds1388 timer , ds18b20 thermometer , LED12864 display circuit , and transfer button circuit and other components , The system displays the time and temperature by 12864LED , so the operation has a user-friendly and more beautiful display. Software includes a clock procedures, the keyboard , the display program , temperature reading procedures. The system is developed using c language , in order to facilitate future expansion and change , the software design is modular in structure , pided into four modules. So logic programming is more succinct , makes clear , in order to adjust the time and date to achieve display more easily. The development tool is Keil, for debugging and compiling programs , the program is downloaded to lm3s8962 processor emulation after compiled .

Keywords  ARM cortex-M3 lm3s8962 RTC Calendar

目 次

1  绪论 1

1.1 本课题的研究意义与研究目的 4

2  硬件电路设计 4

2.1.1 ARM cortex M-3 4

2.1.2 LM3S8962 微控制器 4

2.2  实时时钟设计 7

2.3 LCD 显示电路设计 10

2.4 DS18B20 温度计电路设计 12

3  软件设计 14

3.1  软件开发平台以及驱动库介绍 14

3.1.1 Keil 开发平台简介 14

3.1.2 Stellaris 驱动库简介 15

3.2  主程序设计 16

3.3  按键控制程序设计 20

3.4  实时时钟程序设计 28

3.5 LCD 显示程序设计