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淮 阴 工 学 院

毕业设计说明书（论文）

作 者: 学 院: 专 业: 题 目:

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基于单片机的数字气压计的设计

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(姓 名) (专业技术职务)

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(姓 名) (专业技术职务)

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毕业设计说明书（论文）中文摘要

与生活息息相关的气压计的发展十分迅猛，传统的气压计由于其笨拙，不便于携带而急需改进。然而基于单片机的数字气压计很好的改善了这一点。数字气压计中气压传感器检测到气压值时能够将其转化为电信号，电信号便于传输，易读取，利用这一点可以让气压计的使用从检测到读取方面都真正的实现数字化。本设计以MSP430单片机为核心单片机，选用型号为BMP085的传感芯片作为检测芯片，SIM900A为GSM模块以及其他元器件设计出一个能够快速检测气压值以及温度值，并且能够以手机为媒介及时远程获取气压及温度信息的数字气压计系统，该系统具有成本低、功耗低、构造简单、集成度高、体积轻便等优点。 关键词 气压计，单片机，BMP085，GSM

毕业设计说明书（论文）外文摘要

Title Design of Digital Barometer based on MCU Abstract The development of the barometer is closely related to the life. The traditional barometer is not portable and badly needed to improve because of its clumsy.. However, the digital barometer based on microcontroller has improved the point.. Digital barometer in pressure sensors to detect pressure value can be transformed into electrical signals, electrical signals for transmission, easy to read and use this to let barometer from detection to read are the true realization of digital. This design with MSP430 single chip microcomputer as the core, the selection of models for bmp085 sensing chip as the chip detection, sim900a GSM module and other components to design out a can rapid detection of pressure and temperature values, and be able to mobile phone media timely remote access to pressure and temperature information of digital pressure gauge system. The system has advantages of low cost, low power, simple structure, integration of high volume, light weight, etc.,. Keywords Barometer, MCU, BMP085,GSM

淮阴工学院毕业设计说明书（论文）

目 录

第 Ⅰ 页 共 Ⅰ 页

1 引言???????????????????????????????1 1.1 研究背景和发展??????????????????????????1 1.2 研究的目的和意义?????????????????????????1 1.3 可行性分析????????????????????????????3 2 电路总体设计???????????????????????????3 3 电路硬件设计???????????????????????????3 3.1 硬件设计简介???????????????????????????3 3.2 单片机芯片的选择?????????????????????????5 3.3 液晶显示模块???????????????????????????5 3.4 气压检测模块???????????????????????????8 3.5 GSM模块????????????????????????????12 3.6 供电模块????????????????????????????13 4 电路软件设计???????????????????????????15 4.1 软件设计简介??????????????????????????15 4.2 系统主程序???????????????????????????16 4.3 定时器程序???????????????????????????17 4.4 SIM900A程序??????????????????????????18 5 运行与调试????????????????????????????19 5.1 单片机硬件电路的测试??????????????????????20 5.2 电源电路测试??????????????????????????20 5.3 显示模块电路的测试???????????????????????20 5.4 系统总体运行??????????????????????????20 结 论???????????????????????????????22 致 谢???????????????????????????????23 参 考 文 献?????????????????????????????24 附录A????????????????????????????????25 附录B????????????????????????????????28