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computers

基于CH341A的USB串口通訊設計

為解決當前計算機串行通訊接口只有USB，難以滿足舊型號設備或某些單片機要求RS232通訊的問題，設計出兩款RS232/USB電路。采用CH341A與MAX223集成電路芯片構建標準9線RS232/USB通用接口轉換器，無需編程。采用CH341A與PIC16F877A構建單片機與計算機之間的USB通訊電路，軟件遵循RS232通訊協議，硬件進行電平轉換。實際使用表明，這兩款產品與計算機端Windows 操作系統下的串口應用程序完全兼容，且通訊過程中無握手失敗現象。 Abstract: To solve the problem that current computer serial communication only with USB interface can not satisfy with the old type equipments or MCU to communicate with RS232， two kinds of RS232/USB circuit were designed.CH341A and MAX223 integrated circuit chips were used to create a standard 9-line RS232/USB universal interface convertor without programme. CH341A and PIC16F877A chips were adopted to build the USB communication circuit between computers and MCU. The software follows RS232 communication protocol， and the hardware converts electrical levels. Actual practices indicate that the two manufactures are compatible with serial application program of Windows operation system completely，and get avoid of handshake lost.

標簽： 341A 341 USB CH

上傳時間： 2013-11-03

上傳用戶：siying
基于MSP430F149的無線環境監測傳感器系統設計

為了提高環境參數采集的自動化水平，提升效率，設計了無線傳感器系統。本系統運用了傳感器技術、通信技術和單片機技術，實現了對環境溫度、濕度、光照度以及可燃性氣體濃度等參數的檢測。它能夠實時地與上位機進行無線通信，滿足對環境參數實時監測的要求。 Abstract: In order to increase the degree of automation and improve the efficiency of the environment monitoring parameters，the wireless sensor system was developed.Combining with the technique of sensor,automatic monitoring，communication and single-chip microcomputer，it realized real-time monitoring environment parameters,such as temperature，humidity，illumination，concentration of com- bustible gas and so on.At the same time it can communicate with upper personal computers，satisfy the desire of real-time monitoring.

標簽： 430F F149 MSP 430

上傳時間： 2013-11-22

上傳用戶：longlong12345678
MT8870D DTMF解碼芯片

Features• Complete DTMF Receiver• Low power consumption• Internal gain setting amplifier• Adjustable guard time• Central office quality• Power-down mode• Inhibit mode• Backward compatible withMT8870C/MT8870C-1Applications• Receiver system for British Telecom (BT) orCEPT Spec (MT8870D-1)• Paging systems• Repeater systems/mobile radio• Credit card systems• Remote control• Personal computers• Telephone answering machine

標簽： 8870D 8870 DTMF MT

上傳時間： 2013-11-20

上傳用戶：mpquest
時鐘恢復設計_英文版

Today in many applications such as network switches, routers, multi-computers,and processor-memory interfaces, the ability to integrate hundreds of multi-gigabit I/Os is desired to make better use of the rapidly advancing IC technology.

標簽： 時鐘恢復英文

上傳時間： 2013-10-30

上傳用戶：ysjing
半導體器件物理與設計

It would not be an exaggeration to say that semiconductor devices have transformed humanlife. From computers to communications to internet and video games these devices and the technologies they have enabled have expanded human experience in a way that is unique in history. Semiconductor devices have exploited materials, physics and imaginative applications to spawn new lifestyles. Of course for the device engineer, in spite of the advances, the challenges of reaching higher frequency, lower power consumption, higher power generation etc.

標簽： 半導體器件物理

上傳時間： 2013-10-28

上傳用戶：songnanhua
Password Safe Password Safe is a password database utility. Users can keep their passwords securely

Password Safe Password Safe is a password database utility. Users can keep their passwords securely encrypted on their computers. A single Safe Combination unlocks them all.

標簽： Password Safe passwords database

上傳時間： 2015-01-19

上傳用戶：李彥東
Blaster is a simple application that illustrates Windows NT 5.0’s support of the IrDA protocol. IrDA

Blaster is a simple application that illustrates Windows NT 5.0’s support of the IrDA protocol. IrDA provides reliable point to point connectivity between 2 computers equipped with infrared

標簽： IrDA application illustrates protocol

上傳時間： 2015-03-29

上傳用戶：Thuan
作者：林信良（網絡化名良葛格) 學歷：臺灣大學電機工程學系經歷：SUN教育訓練中心講師著作：《JAVA 學習筆記》、《Spring 技術手冊》

作者：林信良（網絡化名良葛格) 學歷：臺灣大學電機工程學系經歷：SUN教育訓練中心講師著作：《JAVA 學習筆記》、《Spring 技術手冊》，為SUN官方教材主要編寫成員之一博客: http://blog.csdn.net/caterpillar_here 本書詳細信息： http://www.china-pub.com/computers/common/info.asp?id=31664

標簽： Spring JAVA SUN 網絡

上傳時間： 2013-12-24

上傳用戶：yyq123456789
palm編成,這種書很少,有興趣看看 Title: Palm Programming: The Developer s Guide URL: http://safari.oreilly.com/J

palm編成,這種書很少,有興趣看看 Title: Palm Programming: The Developer s Guide URL: http://safari.oreilly.com/JVXSL.asp?x=1&mode=section&sortKey=rank&sortOrder=desc&view=book&xmlid=1-56592-525-4&open=false&srchText=palm+programming&code=&h=&m=&l=1&catid=&s=1&b=1&f=1&t=1&c=1&u=1&page=0 ISBN: 1-56592-525-4 Author: Julie McKeehan/ Neil Rhodes Publisher: O Reilly Page: 478 Edition: 1st edition (December 1998) Catalog: PDA programming / Palm Format: pdf Size: 2.06M Supplier: Summary: Emerging as the bestselling hand-held computers of all time, PalmPilots have spawned intense developer activity and a fanatical following. Used by Palm in their developer training, this tutorial-style book shows intermediate to experienced C programmers how to build a Palm application from the ground up. Includes a CD-ROM with source code and third-party developer tools

標簽： Programming Developer oreilly safari

上傳時間： 2013-12-10

上傳用戶：litianchu
Learning Kernel Classifiers: Theory and Algorithms, Introduction This chapter introduces the general

Learning Kernel Classifiers: Theory and Algorithms, Introduction This chapter introduces the general problem of machine learning and how it relates to statistical inference. 1.1 The Learning Problem and (Statistical) Inference It was only a few years after the introduction of the first computer that one of man’s greatest dreams seemed to be realizable—artificial intelligence. Bearing in mind that in the early days the most powerful computers had much less computational power than a cell phone today, it comes as no surprise that much theoretical research on the potential of machines’ capabilities to learn took place at this time. This becomes a computational problem as soon as the dataset gets larger than a few hundred examples.

標簽： Introduction Classifiers Algorithms introduces

上傳時間： 2015-10-20

上傳用戶：aeiouetla