//芯片資料請到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整延時的時間//sbit DQ =P2^1;//根據實際情況定義端口 typedef unsigned char byte;typedef unsigned int word; //延時void delay(word useconds){ for(;useconds>0;useconds--);} //復位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 總線上讀取一個字節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 總線上寫一個字節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;}
上傳時間： 2013-11-03
上傳用戶：hongmo
The Virtex™-4 user access register (USR_ACCESS_VIRTEX4) is a 32-bit register thatprovides direct access to bitstream data by the FPGA fabric. It is useful for loadingPowerPC™ 405 (PPC405) processor caches and/or other data into the FPGA after the FPGAhas been configured, thus achieving partial reconfiguration. The USR_ACCESS_VIRTEX4register is programmed through the bitstream with a command that writes a series of 32-bitwords.
標簽： USR_ACCESS PowerPC XAPP 719
上傳時間： 2013-11-13
上傳用戶：我累個乖乖
1 Communication Protocol (Computer as master) The communication protocol describes here allows your computer to access 4096 internal registers (W0000-W4095) and 1024 internal relays (B0000-B1023) in the Workstation.. 1.1 Request Message Format Request message is a command message to be sent from the computer to the Workstation. The data structure of request message is shown below. Note that numbers are always in hexadecimal form and converted into ASCII characters. For example, Workstation unit number 14 will appear in the message as character 0(30h) followed by character E(45h); a BCC of 5Ah will appear in the message as character 5(35h) followed by character A(41h).
上傳時間： 2013-10-28
上傳用戶：cxl274287265
很多不同的廠家生產各種型號的計算機，它們運行完全不同的操作系統，但TCP.IP協議族允許它們互相進行通信。這一點很讓人感到吃驚，因為它的作用已遠遠超出了起初的設想。T C P / I P起源于6 0年代末美國政府資助的一個分組交換網絡研究項目，到9 0年代已發展成為計算機之間最常應用的組網形式。它是一個真正的開放系統，因為協議族的定義及其多種實現可以不用花錢或花很少的錢就可以公開地得到。它成為被稱作“全球互聯網”或“因特網(Internet)”的基礎，該廣域網（WA N）已包含超過1 0 0萬臺遍布世界各地的計算機。本章主要對T C P / I P協議族進行概述，其目的是為本書其余章節提供充分的背景知識。 TCP.IP協議 縮略語 ACK (ACKnowledgment) TCP首部中的確認標志 API (Application Programming Interface) 應用編程接口 ARP (Address Resolution Protocol) 地址解析協議 ARPANET(Defense Advanced Research Project Agency NETwork) (美國)國防部遠景研究規劃局 AS (Autonomous System) 自治系統 ASCII (American Standard Code for Information Interchange) 美國信息交換標準碼 ASN.1 (Abstract Syntax Notation One) 抽象語法記法1 BER (Basic Encoding Rule) 基本編碼規則 BGP (Border Gateway Protocol) 邊界網關協議 BIND (Berkeley Internet Name Domain) 伯克利I n t e r n e t域名 BOOTP (BOOTstrap Protocol) 引導程序協議 BPF (BSD Packet Filter) BSD 分組過濾器 CIDR (Classless InterDomain Routing) 無類型域間選路 CIX (Commercial Internet Exchange) 商業互聯網交換 CLNP (ConnectionLess Network Protocol) 無連接網絡協議 CRC (Cyclic Redundancy Check) 循環冗余檢驗 CSLIP (Compressed SLIP) 壓縮的S L I P CSMA (Carrier Sense Multiple Access) 載波偵聽多路存取 DCE (Data Circuit-terminating Equipment) 數據電路端接設備 DDN (Defense Data Network) 國防數據網 DF (Don’t Fragment) IP首部中的不分片標志 DHCP (Dynamic Host Configuration Protocol) 動態主機配置協議 DLPI (Data Link Provider Interface) 數據鏈路提供者接口 DNS (Domain Name System) 域名系統 DSAP (Destination Service Access Point) 目的服務訪問點 DSLAM (DSL Access Multiplexer) 數字用戶線接入復用器 DSSS (Direct Sequence Spread Spectrum) 直接序列擴頻 DTS (Distributed Time Service) 分布式時間服務 DVMRP (Distance Vector Multicast Routing Protocol) 距離向量多播選路協議 EBONE (European IP BackbONE) 歐洲I P主干網 EOL (End of Option List) 選項清單結束 EGP (External Gateway Protocol) 外部網關協議 EIA (Electronic Industries Association) 美國電子工業協會 FCS (Frame Check Sequence) 幀檢驗序列 FDDI (Fiber Distributed Data Interface) 光纖分布式數據接口 FIFO (First In, First Out) 先進先出 FIN (FINish) TCP首部中的結束標志 FQDN (Full Qualified Domain Name) 完全合格的域名 FTP (File Transfer Protocol) 文件傳送協議 HDLC (High-level Data Link Control) 高級數據鏈路控制 HELLO 選路協議 IAB (Internet Architecture Board) Internet體系結構委員會 IANA (Internet Assigned Numbers Authority) Internet號分配機構 ICMP (Internet Control Message Protocol) Internet控制報文協議 IDRP (InterDomain Routing Protocol) 域間選路協議 IEEE (Institute of Electrical and Electronics Engineering) （美國）電氣與電子工程師協會 IEN (Internet Experiment Notes) 互聯網試驗注釋 IESG (Internet Engineering Steering Group) Internet工程指導小組 IETF (Internet Engineering Task Force) Internet工程專門小組 IGMP (Internet Group Management Protocol) Internet組管理協議 IGP (Interior Gateway Protocol) 內部網關協議 IMAP (Internet Message Access Protocol) Internet報文存取協議 IP (Internet Protocol) 網際協議 I RTF (Internet Research Task Force) Internet研究專門小組 IS-IS (Intermediate System to Intermediate System Protocol) 中間系統到中間系統協議 ISN (Initial Sequence Number) 初始序號 ISO (International Organization for Standardization) 國際標準化組織 ISOC (Internet SOCiety) Internet協會 LAN (Local Area Network) 局域網 LBX (Low Bandwidth X) 低帶寬X LCP (Link Control Protocol) 鏈路控制協議 LFN (Long Fat Net) 長肥網絡 LIFO (Last In, First Out) 后進先出 LLC (Logical Link Control) 邏輯鏈路控制 LSRR (Loose Source and Record Route) 寬松的源站及記錄路由 MBONE (Multicast Backbone On the InterNEt) Internet上的多播主干網 MIB (Management Information Base) 管理信息庫 MILNET (MILitary NETwork) 軍用網 MIME (Multipurpose Internet Mail Extensions) 通用I n t e r n e t郵件擴充 MSL (Maximum Segment Lifetime) 報文段最大生存時間 MSS (Maximum Segment Size) 最大報文段長度 M TA (Message Transfer Agent) 報文傳送代理 MTU (Maximum Transmission Unit) 最大傳輸單元 NCP (Network Control Protocol) 網絡控制協議 NFS (Network File System) 網絡文件系統 NIC (Network Information Center) 網絡信息中心 NIT (Network Interface Tap) 網絡接口栓（S u n公司的一個程序） NNTP (Network News Transfer Protocol) 網絡新聞傳送協議 NOAO (National Optical Astronomy Observatories) 國家光學天文臺 NOP (No Operation) 無操作 NSFNET (National Science Foundation NETwork) 國家科學基金網絡 NSI (NASA Science Internet) （美國）國家宇航局I n t e r n e t NTP (Network Time Protocol) 網絡時間協議 NVT (Network Virtual Terminal) 網絡虛擬終端 OSF (Open Software Foudation) 開放軟件基金 OSI (Open Systems Interconnection) 開放系統互連 OSPF (Open Shortest Path First) 開放最短通路優先 PAWS (Protection Against Wrapped Sequence number) 防止回繞的序號 PDU (Protocol Data Unit) 協議數據單元 POSIX (Portable Operating System Interface) 可移植操作系統接口 PPP (Point-to-Point Protocol) 點對點協議 PSH (PuSH) TCP首部中的急迫標志 RARP (Reverse Address Resolution Protocol) 逆地址解析協議 RFC (Request For Comments) Internet的文檔，其中的少部分成為標準文檔 RIP (Routing Information Protocol) 路由信息協議 RPC (Remote Procedure Call) 遠程過程調用 RR (Resource Record) 資源記錄 RST (ReSeT) TCP首部中的復位標志 RTO (Retransmission Time Out) 重傳超時 RTT (Round-Trip Time) 往返時間 SACK (Selective ACKnowledgment) 有選擇的確認 SLIP (Serial Line Internet Protocol) 串行線路I n t e r n e t協議 SMI (Structure of Management Information) 管理信息結構 SMTP (Simple Mail Transfer Protocol) 簡單郵件傳送協議 SNMP (Simple Network Management Protocol) 簡單網絡管理協議 SSAP (Source Service Access Point) 源服務訪問點 SSRR (Strict Source and Record Route) 嚴格的源站及記錄路由 SWS (Silly Window Syndrome) 糊涂窗口綜合癥 SYN (SYNchronous) TCP首部中的同步序號標志 TCP (Transmission Control Protocol) 傳輸控制協議 TFTP (Trivial File Transfer Protocol) 簡單文件傳送協議 TLI (Transport Layer Interface) 運輸層接口 TTL (Ti m e - To-Live) 生存時間或壽命 TUBA (TCP and UDP with Bigger Addresses) 具有更長地址的T C P和U D P Telnet 遠程終端協議 UA (User Agent) 用戶代理 UDP (User Datagram Protocol) 用戶數據報協議 URG (URGent) TCP首部中的緊急指針標志 UTC (Coordinated Universal Time) 協調的統一時間 UUCP (Unix-to-Unix CoPy) Unix到U n i x的復制 WAN (Wide Area Network) 廣域網 WWW (World Wide Web) 萬維網 XDR (eXternal Data Representation) 外部數據表示 XID (transaction ID) 事務標識符 XTI (X/Open Transport Layer Interface) X/ O p e n運輸層接口
上傳時間： 2013-11-13
上傳用戶：tdyoung
本文主要通過介紹PLC通訊的意義和三菱FX系列PLC的四種通訊方式，并重點介紹FX系列PLC與計算機無協議通訊，主要從無協議通訊的硬件、配線、數據寄存器設置、PLC與計算機無協議通訊的指令用法、PLC程序編寫和計算機VB程序的編寫來說明無協議通訊的過程和一般方法。 My dissertation introduces the significance of PLC communications and the four means of communication of Mitsubishi FX’s PLC, And highlights the no protocol communications of FX series PLC and computer, no protocol communications hardware, wiring, Register data set, and the usage of command about no protocol communications, How to write PLC program and computer VB program to illustrate the process of no protocol communications and general method.
上傳時間： 2014-11-29
上傳用戶：Jerry_Chow
User ManualRev. 1.2SmartRF® CC2420DK: Packet Sniffer for IEEE 802.15.4 and ZigBee Table of contents1 INTRODUCTION...............................................................................................31.1 HARDWARE PLATFORM.......................................................................................31.2 SOFTWARE.........................................................................................................32 USER INTERFACE..........................................................................................42.1 MENUS AND TOOLBARS.......................................................................................62.2 SETUP................................................................................................................62.3 SELECT FIELDS...................................................................................................72.3.1 Tips............................................................................................................72.4 PACKET DETAILS.................................................................................................72.5 ADDRESS BOOK..................................................................................................92.5.1 Tips............................................................................................................92.6 DISPLAY FILTER................................................................................................102.7 TIME LINE.........................................................................................................103 HELP....................................................................................................................114 TROUBLESHOOTING..................................................................................125 GENERAL INFORMATION........................................................................135.1 DOCUMENT HISTORY........................................................................................135.2 DISCLAIMER......................................................................................................135.3 TRADEMARKS...................................................................................................136 ADDRESS INFORMATION........................................................................14
上傳時間： 2014-01-14
上傳用戶：zhangyi99104144
The NCV7356 is a physical layer device for a single wire data linkcapable of operating with various Carrier Sense Multiple Accesswith Collision Resolution (CSMA/CR) protocols such as the BoschController Area Network (CAN) version 2.0. This serial data linknetwork is intended for use in applications where high data rate is notrequired and a lower data rate can achieve cost reductions in both thephysical media components and in the microprocessor and/ordedicated logic devices which use the network.The network shall be able to operate in either the normal data ratemode or a high-speed data download mode for assembly line andservice data transfer operations. The high-speed mode is onlyintended to be operational when the bus is attached to an off-boardservice node. This node shall provide temporary bus electrical loadswhich facilitate higher speed operation. Such temporary loads shouldbe removed when not performing download operations.The bit rate for normal communications is typically 33 kbit/s, forhigh-speed transmissions like described above a typical bit rate of83 kbit/s is recommended. The NCV7356 features undervoltagelockout, timeout for faulty blocked input signals, output blankingtime in case of bus ringing and a very low sleep mode current.
上傳時間： 2013-10-24
上傳用戶：s藍莓汁
We offer a broad line of high performance low dropout (LDO) linear regulators with fasttransient response, excellent line and load regulation, and very wide input voltage rangefrom 0.9V to 100V. Output currents range from 20mA to 10A, with positive, negative andmultiple output versions available. Many devices offer output voltage operation <0.8V andsome feature operation as low as 0V, even with a single supply. Most are stable with ceramicoutput capacitors. LDO regulators can be applied in virtually any application.
上傳時間： 2013-11-15
上傳用戶：努力努力再努力
EPON主要由三個部分構成，包括光線路終端(OLlj Optical Line Terminal)、光分配網絡(ODN，Optical Distribution Network)和光網絡單元(ONU，Optical Network Unit .
上傳時間： 2013-11-11
上傳用戶：JGR2013
On the LPC13xx, programming, erasure and re-programming of the on-chip flash can be performed using In-System Programming (ISP) via the UART serial port, and also, can be performed using In-Application Programming (IAP) calls directed by the end-user code. For In-System Programming (ISP) via the UART serial port, the ISP command handler (resides in the bootloader) allows erasure of one or more sector (s) of the on-chip flash memory.
上傳時間： 2013-12-13
上傳用戶：lmq0059
