P89LPC932是Philips公司推出的高性價比單片機,該器件內含增強型CPU,同一工作頻率下的速度為標準80C51單片機的6倍。文中介紹了P89LPC932的主要特點,給出了基于P89LPC932的車輛數據采集系統的組成框圖。 Abstract: The Philips P89LPC932 is a high cost-effective 8051-based microcontroller.High performance 2-clock 80C51 CPU providing 6 times the preformance of the standard 80C51.The main characteristic of P89LPC932? and its application in vehicle data collection system are given.
上傳時間: 2013-10-28
上傳用戶:gyq
WTS701是華邦公司推出的內建喇叭驅動功能的“文字轉發音”單芯片集成電路。該芯片將連續運算法與華邦專有的多層次儲存技術相結合,從而實現了真正將“文字轉發音”的完整功能。文中介紹了該芯片的原理及典型應用,給出了Cygnal F120 MPU與WTS701 的接口電路,并根據相應的芯片指令給出了其控制軟件的代碼程序。 Abstract: WTS701 is really a single chip on “text-to-speech” produced by Winbond company building-in algorithm with the company's patented multi-level storageMLS technology熏 different from other chips that “text-to-speech” on the market at present. The principle and typical application of this chip are introduced in this article the interface circuit of Cygnal F120 MPU and WTS701 is presented. The corresponding? control software is provided.
上傳時間: 2013-10-08
上傳用戶:旗魚旗魚
DS1991是一種多密鑰信息紐扣,文章介紹了DS1991的主要特點、工作原理及讀寫方法。給出了一種基于DS1991和PIC單片機的智能水卡設計方案,同時給出了整個系統的硬件組成原理和軟件設計方法。 Abstract: DS1991 is a multikey iButton. The characteristic operation principle and the way of read/write of DS1991 are introduced in the paper. A smart water card based on DS1991 and PIC singlechip is presented the design of hardware and software are also given
上傳時間: 2013-11-06
上傳用戶:李彥東
介紹了點型光電感煙探測器的工作原理,闡述了PIC16F676單片機的特殊功能,同時給出了該功能在探測器設計中的應用方法,最后給出了基于PIC16F676單片機設計的探測器的硬件構成和軟件程序。 Abstract: To begin with ,the principle of point type optical smoke detector is simply introduced and then the spe-cific functions of PIC16F676 are emphatically illuminated and it is also expounded that how to apply the specific functions in design of the detector.Furthermore the hardware and software design of detector are provided.
上傳時間: 2013-11-18
上傳用戶:hanwudadi
為解決輸油管道溫度壓力參數實時監測的問題,設計了以C8051F930單片機作為控制核心的超低功耗輸油管道溫度壓力遠程監測系統。現場儀表使用高精度電橋采集數據,通過433 MHz短距離無線通信網絡與遠程終端RTU進行通信,RTU通過GPRS網絡與PC上位機進行遠程數據傳輸,在上位機中實現數據存儲和圖形化界面顯示,從而實現輸油管道溫度壓力參數的實時監測和異常報警。經實驗證明,該系統的12位數據采集精度滿足設計要求,漏碼率小于1%,正常工作時間超過5個月,能實時有效地監測輸油管道的溫度壓力參數,節省大量人工成本,有效預防管道參數異常造成的經濟損失和環境污染。 Abstract: In order to solve the problems on real-time monitoring of pipeline temperature and pressure parameters, the ultra-low power remote pipeline temperature and pressure monitoring system was designed by using the single chip processor C8051F930 as the control core. The high-precision electric bridge was used in field instruments for data collection, the 433MHz short-range wireless communication network was used to make communication between field instrument and RTU, the GPRS was used by the RTU to transmit data to the PC host computer, and the data was stored and displayed in the PC host computer, so the real-time monitoring and exception alerts of pipeline temperature and pressure parameters were achieved. The experiment proves that the system of which error rate is less than 1% over five months working with the 12-bit data acquisition accuracy can effectively monitor the pipeline temperature and pressure parameters in real time, it saves a lot of labor costs and effectively prevents environmental pollution and economic losses caused by abnormal channel parameters.
上傳時間: 2013-11-07
上傳用戶:cuibaigao
針對船舶氣象儀保障維修而設計的船舶氣象儀測試系統,包括信息處理終端、主儀器檢測模塊、傳感器檢測模塊,各個模塊都采用基于AVR單片機的嵌入式系統,模塊之間通過CAN總線進行通信。結果表明,船舶氣象儀測試系統能夠快速檢測船舶氣象儀故障,與單純依靠人工方式排查故障相比,故障檢測時間縮短了60%以上。 Abstract: The test system of ship meteorological instrument was developed to satisfy the maintenance of ship meteorological instruments,which composed of information processing terminal, testing module of main instrument and testing module of sensors. Each of these modules included an embedded system based on microcontroller of AVR series and communicated with other module by CAN bus. The results show that the test system can judge the fault of ship meteorological instrument quickly and shorten the fault detection time as much as 60% compared with simple manual troubleshooting.
上傳時間: 2013-11-23
上傳用戶:stvnash
介紹一種基于C8051F340快速單片機控制的直放站設計;采用GPS同步法,按時隙功率控制,自動增益控制AGC環路,系統的非線性指標良好、抗干擾性強、可靠性高。比以功率檢測的同步方法和基于特征窗搜索的同步方法實現簡單,應用范圍更廣,可用于任何無線直放站應用場合,特別適用于干放及無線射頻交換場合。
上傳時間: 2013-10-15
上傳用戶:hanhanhan
本文以Microchip公司內部集成的CAN模塊PIC18F258單片機為核心,介紹CAN總線電動車窗控制系統的硬件電路結構及軟件設計流程。由于PIC18F258單片機對CAN收發器PCA82C250進行數據操作時只需要TXD、RXD兩條數據線,這樣就大大簡化了硬件電路的設計,提高了系統的可靠性。
上傳時間: 2013-11-08
上傳用戶:brilliantchen
第一章 序論……………………………………………………………6 1- 1 研究動機…………………………………………………………..7 1- 2 專題目標…………………………………………………………..8 1- 3 工作流程…………………………………………………………..9 1- 4 開發環境與設備…………………………………………………10 第二章 德州儀器OMAP 開發套件…………………………………10 2- 1 OMAP介紹………………………………………………………10 2-1.1 OMAP是什麼?…….………………………………….…10 2-1.2 DSP的優點……………………………………………....11 2- 2 OMAP Architecture介紹………………………………………...12 2-2-1 OMAP1510 硬體架構………………………………….…12 2-2.2 OMAP1510軟體架構……………………………………...12 2-2.3 DSP / BIOS Bridge簡述…………………………………...13 2- 3 TI Innovator套件 -- OMAP1510 ……………………………..14 2-2.1 General Purpose processor -- ARM925T………………...14 2-2.2 DSP processor -- TMS320C55x …………………………15 2-2.3 IDE Tool – CCS …………………………………………15 2-2.4 Peripheral ………………………………………………..16 第三章 在OMAP1510上建構Embedded Linux System…………….17 3- 1 嵌入式工具………………………………………………………17 3-1.1 嵌入式程式開發與一般程式開發之不同………….….17 3-1.2 Cross Compiling的GNU工具程式……………………18 3-1.3 建立ARM-Linux Cross-Compiling 工具程式………...19 3-1.4 Serial Communication Program………………………...20 3- 2 Porting kernel………………………………………………….…21 3-2.1 Setup CCS ………………………………………….…..21 3-2.2 編譯及上傳Loader…………………………………..…23 3-2.3 編譯及上傳Kernel…………………………………..…24 3- 3 建構Root File System………………………………………..…..26 3-3.1 Flash ROM……………………………………………...26 3-3.2 NFS mounting…………………………………………..27 3-3.3 支援NFS Mounting 的kernel…………………………..27 3-3.4 提供NFS Mounting Service……………………………29 3-3.5 DHCP Server……………………………………………31 3-3.6 Linux root 檔案系統……………………………….…..32 3- 4 啟動及測試Innovator音效裝置…………………………..…….33 3- 5 建構支援DSP processor的環境…………………………...……34 3-5.1 Solution -- DSP Gateway簡介……………………..…34 3-5.2 DSP Gateway運作架構…………………………..…..35 3- 6 架設DSP Gateway………………………………………….…36 3-6.1 重編kernel……………………………………………...36 3-6.2 DEVFS driver…………………………………….……..36 3-6.3 編譯DSP tool和API……………………………..…….37 3-6.4 測試……………………………………………….…….37 第四章 MP3 Player……………………………………………….…..38 4- 1 MP3 介紹………………………………………………….…….38 4- 2 MP3 壓縮原理……………………………………………….….39 4- 3 Linux MP3 player – splay………………………………….…….41 4.3-1 splay介紹…………………………………………….…..41 4.3-2 splay 編譯………………………………………….…….41 4.3-3 splay 的使用說明………………………………….……41 第五章 程式改寫………………………………………………...…...42 5-1 程式評估與改寫………………………………………………...…42 5-1.1 Inter-Processor Communication Scheme…………….....42 5-1.2 ARM part programming……………………………..…42 5-1.3 DSP part programming………………………………....42 5-2 程式碼………………………………………………………..……43 5-3 雙處理器程式開發注意事項…………………………………...…47 第六章 效能評估與討論……………………………………………48 6-1 速度……………………………………………………………...48 6-2 CPU負載………………………………………………………..49 6-3 討論……………………………………………………………...49 6-3.1分工處理的經濟效益………………………………...49 6-3.2音質v.s 浮點與定點運算………………………..…..49 6-3.3 DSP Gateway架構的限制………………………….…50 6-3.4減少IO溝通……………….………………………….50 6-3.5網路掛載File System的Delay…………………..……51 第七章 結論心得…
上傳時間: 2013-10-14
上傳用戶:a471778
上傳時間: 2013-11-06
上傳用戶:1397412112