外文翻譯--gsm模塊收發(fā)中文短消息的關鍵技術-其他專業(yè)-資料下載頁
2025-01-19 09:49本頁面
【導讀】的一種通信方案。目前，隨著手機的廣泛使用，SMS服務以其傳遞信息方便快捷、遠程維護及數(shù)據(jù)信息查詢等各個領域。用數(shù)控模擬開關CD4052實現(xiàn)了單片機多個串口的擴展。目前，市場上GSM模塊種類很多，但功能、用法基本相同。Siemens公司生產的TC35i模塊。該模塊與GSM2／2兼容，提供雙頻(GSM900／。所示；通過AT命令來傳輸數(shù)據(jù)、語音和短消息等，方便用戶開發(fā)和設計?；驍?shù)據(jù)電路終接設備。設備通過發(fā)送AT命令來控制移動臺，并與GSM網絡。通過AT命令可進行呼叫、短信、電話本、數(shù)據(jù)業(yè)務、補充業(yè)務。常用短消息相關AT指令及說明如表1所列。Text模式是純文本方式，可使用不同的字符集。本文通過編碼轉換實現(xiàn)了GSM模塊在Text模式下收發(fā)中文短信息。按照GSM07．05協(xié)議規(guī)定，手機短信息中的漢字編碼均采用。經研究比較發(fā)現(xiàn)，所要提取的短信信息包括手機號碼、時間和短信內容。也就是說，一個中文編碼轉換最多經過13次比較查找即。對于終端接收中英文信息的項目，采用本文所。據(jù)遠傳等方面，也能很好地結合本技術。
【正文】 with the GSM module is not longer connected to other serial equipment。 and some highercost serial expansion of the chip, connecting more trouble. This method is the use of numerical control analog switches CD4052 do many serial expander, lowcost and easy wiring. Its pin shown in figure 3. CD4052 has four independent channel data selector, has A, B two inputs and a ban on the importation of INH, through A, B of the four kinds of binary bination of state of four pairs of channels to choose one of the right. This design, A, B, respectively, occupied by and I, P2 = 0x01 while strobe module serial port, P2 = 0x02 is connected to other serial devices. When INH for 1, all channels are closed. X, Y, respectively, to connect MCU RXD and TXD, a serial port may be extended to 4, the specific wiring method shown in Figure 4. CD4052 are in fact two subfourone data distributor, the expansion of fullduplex asynchronous serial ports are working mode of high speed, easy to realize a more than a singlechip serial port expansion capacity. Siemens pany to TC35i GSM module for the programming object, through the P89 V51 singlechip control, build the actual systems, the realization of the programming process and system, such as serial port expansion, effectively receive and plete the Chinese short message code conversion, verify the above ideas to build the feasibility and correctness. GSM singlechip control module in the Text mode mobile phone to receive text messages in Chinese, the encoding format conversion relatively easy, and have a higher conversion the terminal to receive information in both English and Chinese projects, this paper studied the use of singlechip control module resumption Message GSM technology, the realization of simple, lower cost, can be directly used addition, the expanded singlechip can be simultaneously connected with other serial devices, such as with the serial printer connected, you can directly print out the contents of mobile phone information. In the vehicle monitoring system, storage systems and instrument data to monitor the areas of Far EasTone, but also a good bination of this technology.
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