基于单片机的多功能数字时钟的设计.doc

本科毕业设计 基于单片机的多功能数字时钟 负西弱 201030580405 指导教师 XXX 讲师 学院名称 工程学院 专业名称 电子信息工程 论文提交日期 2014年4月30日 论文答辩日期 2014年5月10日 摘 要 随着数字集成电路的发展和石英晶体与振荡器的广泛应用，数字时钟的精度远远超过了老式钟表，而且能够方便地扩展钟表原先的报时功能，满足人们日常应用的各种需求，数字时钟不管在性能还是功能上都远远超过了传统的钟表。 本设计中的多功能数字时钟采用基于ARM Cortex-M3核心的32 位微控制器STM32F103RCT6作为控制系统的核心，采用内置晶振、具有标准I2C接口的实时时钟芯片SD2403API计算当前的秒、分、时、日、月、年，可保证时钟精度为+5ppm（25℃±1℃下）关键词：The Multifunctional Digital Clock Based On Single Chip Microcomputer Fu Dongqiang (College of Engineering, South China Agricultural University, Guangzhou 510642, China) Abstract: With the development and wide application of digital integrated circuits and quartz crystal oscillators , precision digital clock is far more than the old-fashioned clocks, watches and clocks, and can easily extend the original timekeeping features to meet the diverse needs of everyday applications , digital clock regardless of performance or features are far more than the traditional watches . The design of the multi-function digital clock based on ARM Cortex-M3 core, 32-bit microcontrollers STM32F103RCT6 as the core of the control system, with built-in crystal oscillator , with a standard I2C interface, real-time clock chip SD2403API calculate the current seconds , minutes, hours, day, month , year, can guarantee that the clock accuracy of +5 ppm ( at 25 ℃ ± 1 ℃), adjustment circuit programmed with chip built-in digital time accuracy can be further improved clock accuracy , by 2.2 -inch TFT LCD screen and friendly people machine interface will result visually presented to the user . To have a higher practical value , the use of digital temperature and humidity sensor DHT11 get temperature, humidity, increased temperature and humidity display function; transplant Fatfs SD card file system reads files , increasing the digital photo frame function ; through Gregorian lunar transfer algorithm to achieve a lunar display ; addition , it has added an infrared remote control , alarm clock , electronic calendar, fe