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在需要實(shí)時(shí)大量輸入漢字的顯示控制處理應(yīng)用中，利用傳統(tǒng)單片機(jī)實(shí)現(xiàn)顯示控制的設(shè)計(jì)方法是較難實(shí)現(xiàn)的。帶漢字字庫的液晶模塊的使用使得小容量ROM單片機(jī)的大量漢字信息輸入與顯示成為可能。提出了針對(duì)漢字字庫編碼的二級(jí)索引拼音輸入檢索方法,介紹了以ST7920作為控制器的帶漢字字庫的液晶顯示模塊的接口方法及漢字顯示和控制原理，給出了通用計(jì)算機(jī)鍵盤在單片機(jī)中的串行接口，采用該技術(shù)可大大增強(qiáng)單片機(jī)的漢字輸入功能。為小容量ROM單片機(jī)的大批量漢字信息處理提供了一種漢字輸入解決方案。
Abstract:
It is difficult to realize Chinese characters input method based on the embedded system by using the traditional design method of display control. It is possible to input and display Chinese characters based on the embedded system with the ROM of small content by using the LCD module with Chinese characters.Chinese characters input method of the quadric index recall in allusion to Chinese characters code is brought forward.The interface and the principle of Chinese characters display control based on the LCD module controlled with the ST7920 is introduced too.The serial interface of the computer keyboard in common use and the embedded system is given at the same time. It can enhance the embedded system function of Chinese characters input by using this technology, and provide a kind of Chinese characters input scheme for the embedded system with small capacity ROM.
標(biāo)簽：
ROM
單片機(jī)
漢字輸入法
上傳時(shí)間：
2013-11-19
上傳用戶：jhksyghr
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Python語言是少有的一種可以稱得上即簡單又功能強(qiáng)大的編程語言。你將驚喜地發(fā)現(xiàn)Python語言是多么地簡單，它注重的是如何解決問題而不是編程語言的語法和結(jié)構(gòu)。Python的官方介紹是：Python是一種簡單易學(xué)，功能強(qiáng)大的編程語言，它有高效率的高層數(shù)據(jù)結(jié)構(gòu)，簡單而有效地實(shí)現(xiàn)面向?qū)ο缶幊獭ython簡潔的語法和對(duì)動(dòng)態(tài)輸入的支持，再加上解釋性語言的本質(zhì)，使得它在大多數(shù)平臺(tái)上的許多領(lǐng)域都是一個(gè)理想的腳本語言，特別適用于快速的應(yīng)用程序開發(fā)。我會(huì)在下一節(jié)里詳細(xì)地討論P(yáng)ython的這些特點(diǎn)。
標(biāo)簽：
python
教程
上傳時(shí)間：
2013-10-15
上傳用戶：dbs012280
-
The PCA9544A provides 4 interrupt inputs, one for each channeland one open drain interrupt output. When an interrupt is generated byany device, it will be detected by the PCA9544A and the interruptoutput will be driven LOW. The channel need not be active fordetection of the interrupt. A bit is also set in the control byte.Bits 4 – 7 of the control byte correspond to channels 0 – 3 of thePCA9544A, respectively. Therefore, if an interrupt is generated byany device connected to channel 2, the state of the interrupt inputs isloaded into the control register when a read is accomplished.Likewise, an interrupt on any device connected to channel 0 wouldcause bit 4 of the control register to be set on the read. The mastercan then address the PCA9544A and read the contents of thecontrol byte to determine which channel contains the devicegenerating the interrupt. The master can then reconfigure thePCA9544A to select this channel, and locate the device generatingthe interrupt and clear it. The interrupt clears when the deviceoriginating the interrupt clears.
標(biāo)簽：
4channel
multiple
9544A
9544
上傳時(shí)間：
2014-12-28
上傳用戶：潛水的三貢
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The outputs of the PCA9518 are immediately available as soon as there is a voltage present on thesupply >~1V and behave as described above. The power-on reset of the PCA9518A keeps the outputsturned off during power-up and maintains the high impedance of the outputs throughout the power-upcycle. There is an additional built-in delay after power-up that allows the analog circuits to stabilize beforethe part is activated.
標(biāo)簽：
Replacement
9518
NXP
PCA
上傳時(shí)間：
2013-10-26
上傳用戶：13817753084
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Although Stellaris microcontrollers have generous internal SRAM capabilities, certain applicationsmay have data storage requirements that exceed the 8 KB limit of the Stellaris LM3S8xx seriesdevices. Since microcontrollers do not have an external parallel data-bus, serial memory optionsmust be considered. Until recently, the ubiquitous serial EEPROM/flash device was the only serialmemory solution. The major limitations of EEPROM and flash technology are slow write speed, slowerase times, and limited write/erase endurance.Recently, serial SRAM devices have become available as a solution for high-speed dataapplications. The N256S08xxHDA series of devices, from AMI Semiconductor, offer 32 K x 8 bits oflow-power data storage, a fast Serial Peripheral Interface (SPI) serial bus, and unlimited write cycles.The parts are available in 8-pin SOIC and compact TSSOP packages.
標(biāo)簽：
Adding
Serial
SRAM
32
上傳時(shí)間：
2013-10-14
上傳用戶：cxl274287265
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提出了一個(gè)由AT89C52單片機(jī)控制步進(jìn)電機(jī)的實(shí)例。可以通過鍵盤輸入相關(guān)數(shù)據(jù), 并根據(jù)需要, 實(shí)時(shí)對(duì)步進(jìn)電機(jī)工作方式進(jìn)行設(shè)置, 具有實(shí)時(shí)性和交互性的特點(diǎn)。該系統(tǒng)可應(yīng)用于步進(jìn)電機(jī)控制的大多數(shù)場(chǎng)合。實(shí)踐表明, 系統(tǒng)性能優(yōu)于傳統(tǒng)的步進(jìn)電機(jī)控制器。關(guān)鍵詞: 單片機(jī); 步進(jìn)電動(dòng)機(jī); 直流固態(tài)繼電器; 實(shí)時(shí)控制Con trol System of Stepp ingMotor Ba sed on AT89C52 ChipM icrocomputerMENGWu2sheng, L ILiang (College of Automatization, Northwestern Polytechnical Unversity, Xipan 710072, China)ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor controlling. The p ractice showed that the performance of this system outdid the tradi tional stepp ing motor controller.KEY WORDS: Chip microcomputer; Stepp ingmotor; DCSSR; Real2time control
標(biāo)簽：
Control
System
ingMot
Stepp
上傳時(shí)間：
2013-11-19
上傳用戶：leesuper
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//芯片資料請(qǐng)到www.elecfans.com查找
//DS1820 C51 子程序//這里以11.0592M晶體為例，不同的晶體速度可能需要調(diào)整延時(shí)的時(shí)間//sbit DQ =P2^1;//根據(jù)實(shí)際情況定義端口
typedef unsigned char byte;typedef unsigned int word;
//延時(shí)void delay(word useconds){ for(;useconds>0;useconds--);}
//復(fù)位byte ow_reset(void){ byte presence; DQ = 0; //pull DQ line low delay(29); // leave it low for 480us DQ = 1; // allow line to return high delay(3); // wait for presence presence = DQ; // get presence signal delay(25); // wait for end of timeslot return(presence); // presence signal returned} // 0=presence, 1 = no part
//從 1-wire 總線上讀取一個(gè)字節(jié)byte read_byte(void){ byte i; byte value = 0; for (i=8;i>0;i--) { value>>=1; DQ = 0; // pull DQ low to start timeslot DQ = 1; // then return high delay(1); //for (i=0; i<3; i++); if(DQ)value|=0x80; delay(6); // wait for rest of timeslot } return(value);}
//向 1-WIRE 總線上寫一個(gè)字節(jié)void write_byte(char val){ byte i; for (i=8; i>0; i--) // writes byte, one bit at a time { DQ = 0; // pull DQ low to start timeslot DQ = val&0x01; delay(5); // hold value for remainder of timeslot DQ = 1; val=val/2; } delay(5);}
//讀取溫度char Read_Temperature(void){ union{ byte c[2]; int x; }temp;
ow_reset(); write_byte(0xCC); // Skip ROM write_byte(0xBE); // Read Scratch Pad temp.c[1]=read_byte(); temp.c[0]=read_byte(); ow_reset(); write_byte(0xCC); //Skip ROM write_byte(0x44); // Start Conversion return temp.x/2;}
標(biāo)簽：
1820
C51
DS
程序
上傳時(shí)間：
2013-11-03
上傳用戶：hongmo
-
傳感器技術(shù)作為信息科學(xué)的一個(gè)重要分支，與計(jì)算機(jī)技術(shù)、自動(dòng)控制技術(shù)和通信技術(shù)等一起構(gòu)成了信息技術(shù)的完整學(xué)科。在人類進(jìn)入信息時(shí)代的今天，人們的一切社會(huì)活動(dòng)都是以信息獲取與信息轉(zhuǎn)換為中心，傳感器作為信息獲取與信息轉(zhuǎn)換的重要手段，是信息科學(xué)最前端的一個(gè)陣地，是實(shí)現(xiàn)信息化的基礎(chǔ)技術(shù)之一。
“沒有傳感器就沒有現(xiàn)代科學(xué)技術(shù)”的觀點(diǎn)已為全世界所公認(rèn)。以傳感器為核心的檢測(cè)系統(tǒng)就像神經(jīng)和感官一樣，源源不斷地向人類提供宏觀與微觀世界的種種信息，成為人們認(rèn)識(shí)自然、改造自然的有力工具。
傳感器原理及應(yīng)用全書分為十個(gè)章結(jié)：
1、傳感器的基本特性
2、各類傳統(tǒng)與新型傳感器的工作原理與應(yīng)用
（1）應(yīng)變式傳感器
（2）電感式傳感器
（3）電容式傳感器
（4）壓電式傳感器
（5）磁電式傳感器
（6）光電式傳感器
（7）半導(dǎo)體式傳感器
（8）波與輻射式傳感器
（9）數(shù)字式傳感器（自學(xué)）
（10）智能式傳感器（自學(xué)）
課程教材
1.郁有文等編著，傳感器原理及工程應(yīng)用，西安科技大學(xué)出版社，2008
2.沈躍、楊喜峰編，物理實(shí)驗(yàn)教程—智能檢測(cè)技術(shù)實(shí)驗(yàn)，中國石油大學(xué)出版社，2010
課程參考書
1. 傳感器與檢測(cè)技術(shù)，胡向東等編著，機(jī)械工業(yè)出版社，2009
2. 傳感器原理及應(yīng)用，王化祥編著，天津大學(xué)出版社，2007
3. 傳感技術(shù)與應(yīng)用教程，張洪潤等編著，清華大學(xué)出版社，2009
4. 傳感器原理及應(yīng)用（項(xiàng)目式教學(xué)），于彤編著，機(jī)械工業(yè)出版社，2008
5. 傳感器與測(cè)試技術(shù)，葉湘濱等編著，國防工業(yè)出版社，2007
6. 傳感器與檢測(cè)技術(shù)，陳杰、黃鴻編著，高等教育出版社，2003
7. Handbook of Modern Sensors(3rd Edition)，Jacob Fraden，Springer-Verlag,Inc.，2004
課程性質(zhì)
課程屬于專業(yè)基礎(chǔ)課，在專業(yè)人才培養(yǎng)中具有提高學(xué)生相關(guān)專業(yè)基礎(chǔ)理論的認(rèn)知能力、增強(qiáng)學(xué)生從事傳感與檢測(cè)技術(shù)研究與應(yīng)用工作的適應(yīng)能力和開發(fā)創(chuàng)新能力的作用。
研究對(duì)象
傳感器技術(shù)的基本概念和理論、常用傳感器的工作原理和應(yīng)用技術(shù)。
學(xué)習(xí)目的與要求
（1）建立傳感器技術(shù)的整體概念；
（2）掌握傳感器技術(shù)的基本理論、常用傳感器的工作原理和應(yīng)用技術(shù)；
（3）獲得應(yīng)用傳感器設(shè)計(jì)、組建測(cè)控系統(tǒng)的基本技能；
（4）培養(yǎng)學(xué)生進(jìn)一步學(xué)習(xí)、研究和應(yīng)用傳感器技術(shù)的興趣；
（5）為學(xué)習(xí)后續(xù)課程和獨(dú)力解決實(shí)際問題打下必要的基礎(chǔ)。
主要考核目標(biāo)（包括重點(diǎn)及難點(diǎn)）
（1）掌握傳感器的基本概念和基本特性；
（2）掌握常用傳感器的工作原理（實(shí)驗(yàn)方法）；
（3）掌握常用傳感器的基本應(yīng)用（實(shí)驗(yàn)技術(shù)）；
（4）了解應(yīng)用傳感器設(shè)計(jì)、組建測(cè)控系統(tǒng)的基本方法；
（5）了解傳感器技術(shù)的發(fā)展前沿和趨勢(shì)。
重點(diǎn)：傳感器的工作原理
難點(diǎn)：傳感器的應(yīng)用技術(shù)；
內(nèi)容涉及知識(shí)面廣，理論性、綜合性和實(shí)踐性強(qiáng)。
標(biāo)簽：
傳感器原理
教程
上傳時(shí)間：
2013-11-13
上傳用戶：yqs138168
-
STC90C51RC-RD+_GUIDE-CHINESE使用手冊(cè)
標(biāo)簽：
GUIDE-CHINESE
RC-RD
STC
90
上傳時(shí)間：
2014-01-06
上傳用戶：lht618
-
The #1 Step-by-Step Guide to labviewNow Completely Updated for labview 8!
Master labview 8 with the industry's friendliest, most intuitive tutorial: labview for Everyone, Third Edition. Top labview experts Jeffrey Travis and Jim Kring teach labview the easy way: through carefully explained, step-by-step examples that give you reusable code for your own projects!
This brand-new Third Edition has been fully revamped and expanded to reflect new features and techniques introduced in labview 8. You'll find two new chapters, plus dozens of new topics, including Project Explorer, AutoTool, XML, event-driven programming, error handling, regular expressions, polymorphic VIs, timed structures, advanced reporting, and much more. Certified labview Developer (CLD) candidates will find callouts linking to key objectives on NI's newest exam, making this book a more valuable study tool than ever.
Not just what to d why to do it!
Use labview to build your own virtual workbench
Master labview's foundations: wiring, creating, editing, and debugging VIs; using controls and indicators; working with data structures; and much more
Learn the "art" and best practices of effective labview development
NEW: Streamline development with labview Express VIs
NEW: Acquire data with NI-DAQmx and the labview DAQmx VIs
NEW: Discover design patterns for error handling, control structures, state machines, queued messaging, and more
NEW: Create sophisticated user interfaces with tree and tab controls, drag and drop, subpanels, and more
Whatever your application, whatever your role, whether you've used labview or not, labview for Everyone, Third Edition is the fastest, easiest way to get the results you're after!
標(biāo)簽：
Everyone
LabVIEW
for
英文
上傳時(shí)間：
2013-10-14
上傳用戶：shawvi
