摘  要


傳統(tǒng)的數(shù)據(jù)傳輸總是存在各種各樣的問題。譬如說:有線網(wǎng)絡(luò)布線費用高、施工麻煩且易受到場合的限制，而無線網(wǎng)絡(luò)應(yīng)用中，無線數(shù)據(jù)電傳在距離較遠時很難實現(xiàn)數(shù)據(jù)的準確傳輸，GSM短消息方式通訊量小且費用昂貴，租用衛(wèi)星對于民用產(chǎn)品價格又相對較高。第2.5代通訊技術(shù)GPRS的出現(xiàn)很好的解決了這些問題。

本課題重點對基于GPRS氣象數(shù)據(jù)傳輸系統(tǒng)的研究,提出微控制器利用無線網(wǎng)絡(luò)連接到Internet進行氣象數(shù)據(jù)的傳輸，并應(yīng)用于實際中。根據(jù)GPRS具有覆蓋范圍廣、數(shù)據(jù)傳輸速率高等特點來分析采用GPRS傳輸氣象數(shù)據(jù)的原因，來設(shè)計的硬件部分，從而達到系統(tǒng)的最優(yōu)化設(shè)計。文中首先介紹了GPRS的相關(guān)知識；其次介紹了單片機MSP430F147和GPRS模塊MC35I的特點和引腳圖；最后簡單介紹了AT命令。

關(guān)鍵詞: GPRS；MC35I；單片機


 


 


 


 


 


 


 


 




Abstract


There are always series of problems about the traditional weather station data,for example,the high cost of wired network cabling,construction problems and limitations of vulnerable situations.In the wireless network applications,wireless data fax is difficult to achieve the accuracy transmission of data in the distance,and GSM short message has a small amount of communication,and its cost is very expensive.The rental satellite has relatively high prices for produ-cts of civilian use.The emergence of 2.5G communication technology GPRS is a good solution to these problems.

This issue focuses on the research of GPRS data transmission system,proposes microcontroller using wireless network to connect to the Internet for the transmission of meteorological data that is applied in practice. In this paper,according to the characteristics like covering a wide range of aera,high data transfer rate etc,the reason of meteorological data transmission using GPRS is gived.Moreover,the hardware is designed to optimize.The design is based on the hardware and software of GPRS meteorological data transmission. What’s more,this design describes the working principle of GPRS,GPRS module MC35I and it introduces the microcontroller.

Keywords:GPRS;MC35I; Microprocessor


 


 


 


 


 


 


目 錄


引 言 1

第一章 GPRS介紹 2

1.1 GPRS概述 2

1.2 GPRS數(shù)據(jù)傳輸?shù)奶攸c 3

1.3 GPRS網(wǎng)絡(luò)結(jié)構(gòu)和工作原理 4

1.3.1GPRS的工作原理 4

1.3.2 GPRS網(wǎng)絡(luò)結(jié)構(gòu) 5

第二章 數(shù)據(jù)采集終端硬件電路設(shè)計 9

2.1系統(tǒng)硬件結(jié)構(gòu)框圖 9

2.2 MSP430F147的電路設(shè)計 9

2.2.1 MSP430系列單片機特點 9

2.2.2 MSP430F147單片機特點 10

2.2.3 MSP430F147單片機結(jié)構(gòu)及接口電路 11

2.3 電源電路 12

2.4復(fù)位電路 13

2.5 GPRS模塊功能介紹 13

2.6 MC35I引腳介紹 14

2.7 MC35I與SIM接口電路 16

2.8 MSP430F147與MC35I連接圖 17

第三章 系統(tǒng)的軟件設(shè)計 18

3.1模塊中與GPRS相關(guān)的AT指令介紹 18

3.2系統(tǒng)軟件流程圖 18

結(jié)  論 20

參考文獻 21

謝  辭 22