5x7 moving Message display
標(biāo)簽： Message display moving 5x7
上傳時(shí)間： 2017-09-18
上傳用戶：趙云興
PicBasic program for PIC16F876A for LCD display. Rolling Message displaying for attractive look.
標(biāo)簽： for attractive displaying PicBasic
上傳時(shí)間： 2017-09-18
上傳用戶：李夢晗
as a Message came into prominence with the publication in 1948 of an influential paper by Claude Shannon, "A Mathematical Theory of Communication." This paper provides the foundations of information theory and endows the word information not only with a technical meaning but also a measure. If the sending device is equally likely to send any one of a set of N Messages, then the preferred measure of "the information produced when one Message is chosen from the set" is the base two logarithm of N (This measure is called self-information). In this paper, Shannon cont
標(biāo)簽： influential publication prominence Message
上傳時(shí)間： 2014-01-21
上傳用戶：2404
TTCAN協(xié)議在CAN協(xié)議基礎(chǔ)之上，將事件觸發(fā)機(jī)制與實(shí)時(shí)性更高的時(shí)間觸發(fā)機(jī)制相結(jié)合，提高了網(wǎng)絡(luò)實(shí)時(shí)性，滿足對安全性要求苛刻的實(shí)時(shí)系統(tǒng)以及總線日益增長的信息負(fù)載的需求；同時(shí)，CAN總線技術(shù)的基礎(chǔ)為TTCAN總線技術(shù)研究奠定了很好的軟硬件支持條件。 論文首先介紹了TTCAN協(xié)議的通訊原理、軟硬件環(huán)境的建立和總線網(wǎng)絡(luò)性能的測試方法。 按照ISO11898－4標(biāo)準(zhǔn)的要求，在自主研發(fā)的CAN總線實(shí)時(shí)仿真系統(tǒng)上結(jié)合軟件編程能夠?qū)崿F(xiàn)TTCAN協(xié)議的時(shí)間觸發(fā)通訊功能，使整個(gè)系統(tǒng)成為具有時(shí)間觸發(fā)功能的TTCAN總線通訊網(wǎng)絡(luò)，得到網(wǎng)絡(luò)要采用TTCAN協(xié)議通訊時(shí)各ECU必須具備穩(wěn)定可靠的本地時(shí)鐘和相應(yīng)的時(shí)鐘同步和計(jì)數(shù)機(jī)制的結(jié)論。 結(jié)合混合動(dòng)力電動(dòng)汽車動(dòng)力系統(tǒng)對采用TTCAN協(xié)議通訊時(shí)的網(wǎng)絡(luò)性能進(jìn)行了測試和分析，結(jié)果表明，TTCAN網(wǎng)絡(luò)中周期型消息的實(shí)時(shí)性不受網(wǎng)絡(luò)中其他消息的影響，時(shí)間觸發(fā)通訊方式和系統(tǒng)矩陣的調(diào)度安排在一定程度上減少了總線上消息間的沖突，提高了網(wǎng)絡(luò)實(shí)時(shí)性和總線帶寬利用率。 對比分析同等條件下TTCAN總線網(wǎng)絡(luò)和CAN總線網(wǎng)絡(luò)的性能，TTCAN協(xié)議能夠保證網(wǎng)絡(luò)總線在高峰值負(fù)載的情況下網(wǎng)絡(luò)的實(shí)時(shí)性。 研究了對TTCAN總線網(wǎng)絡(luò)中time master（時(shí)間主節(jié)點(diǎn)）和reference Message（參考消息）進(jìn)行故障診斷和容錯(cuò)的方法，通過實(shí)驗(yàn)驗(yàn)證了采用冗余的方式能夠保證當(dāng)前時(shí)間意義上的主節(jié)點(diǎn)和參考消息故障情況下整個(gè)網(wǎng)絡(luò)的性能不受影響，提高故障情況下網(wǎng)絡(luò)的可靠性。
標(biāo)簽： TTCAN 電動(dòng)汽車 總線
上傳時(shí)間： 2013-04-24
上傳用戶：refent
在航電系統(tǒng)維護(hù)過程中，為解決定位故障的效率和降低維修成本等問題，提出了基于ICD（Interface Control Document，接口控制文件）的1553B總線的信息監(jiān)控系統(tǒng)模型。該系統(tǒng)運(yùn)用數(shù)據(jù)采集卡對總線中傳輸?shù)男盘?hào)有無失真、偏差等電氣特性進(jìn)行檢測，并使用1553B通訊卡通過測控軟件LabWindows/CVI編程與ICD數(shù)據(jù)庫的動(dòng)態(tài)鏈接，實(shí)現(xiàn)總線信息的解析和故障的判斷。與傳統(tǒng)的維護(hù)過程相比，這種模型能夠從信號(hào)的電氣特性以及信息的解析等全方位的去檢測判斷故障的來源，并且能夠廣泛在其他1553B總線系統(tǒng)內(nèi)擴(kuò)展應(yīng)用。驗(yàn)證表明該監(jiān)控系統(tǒng)可以對總線信息進(jìn)行快速有效地監(jiān)測分析，能滿足應(yīng)用需求。 Abstract: In the process of avionics system maintenance， to solve the problems such as improving the efficiency of fast orientation to troubles and reducing maintenance cost， system of 1553B bus information monitor model based on ICD was proposed. The system observed whether the data which transmitted on the bus appear distortion and deviation by using data acquisition card. And using 1553B communication card programming of the measure software LabWindows/CVI and the dynamic linking of ICD database， Message analysis and fault estimation could be realized. Compared with traditional maintenance， this model can all-dimensionally detect and analyze the source of faults from both electrical characteristics of the signal and Message analysis， and it can be widely applied in the other 1553B system. Experiment shown that this monitor system can effectively detect and analyze the bus Message and can meet the application requirements.
標(biāo)簽： 1553B 總線 信息監(jiān)控
上傳時(shí)間： 2013-11-23
上傳用戶：18752787361
首先研究CAN總線和SAE J1939協(xié)議，提出一種基于MC9S12HZ256微控制器的總線式汽車數(shù)字儀表解決方案。詳細(xì)介紹SAE J1939協(xié)議的報(bào)文幀格式及應(yīng)用層協(xié)議中發(fā)動(dòng)機(jī)相關(guān)參數(shù)的定義，以及步進(jìn)電機(jī)及其驅(qū)動(dòng)和車速信號(hào)的處理方法。該數(shù)字儀表系統(tǒng)硬件平臺(tái)由微處理器和信號(hào)采集和信息處理及顯示等模塊組成。軟件設(shè)計(jì)部分編程實(shí)現(xiàn)了對CAN總線和各傳感器數(shù)據(jù)的讀取、處理。該系統(tǒng)能夠?qū)崟r(shí)反映車輛工況。 Abstract: In this paper，CAN bus and SAE J1939protocol are researched，and a vehicle digital instrument solution based on MC9S12HZ256MCU is proposed.The Message frame format and some engine-related parameters’definition in SAE J1939application layer protocol are introduced in detail.Stepper motor and its driver，the methods of speed signal process-ing are also introduced.The hardware platform of vehicle digital instrument is composed by MCU，signal acquisition mod-ule，and signal processing and displaying module.Data receiving and processing from CAN bus and sensors are accom-plished by programming，and vehicle condition can be reflected in real-time.
上傳時(shí)間： 2013-10-20
上傳用戶：huannan88
FeaturesThe following standard features are provided.• Choice of RTOS scheduling policy1. Pre-emptive:Always runs the highest available task. Tasks of identical priorityshare CPU time (fully pre-emptive with round robin time slicing).2. Cooperative:Context switches only occur if a task blocks, or explicitly callstaskYIELD().• Co-routines (light weight tasks that utilise very little RAM).• Message queues• Semaphores [via macros]• Trace visualisation ability (requires more RAM)• Majority of source code common to all supported development tools• Wide range of ports and examples
上傳時(shí)間： 2013-10-13
上傳用戶：13162218709
This application note shows how to write an Inter Integrated Circuit bus driver (I²C) for the Philips P90CL301micro-controller.It is not only an example of writing a driver, but it also includes a set of application interface software routines toquickly implement a complete I²C multi-master system application.For specific applications the user will have to make minimal changes in the driver program. Using the drivermeans linking modules to your application software and including a header-file into the application sourceprograms. A small example program of how to use the driver is listed.The driver supports i.a. polled or interrupt driven Message handling, slave Message transfers and multi-mastersystem applications. Furthermore, it is made suitable for use in conjunction with real time operating systems, likepSOS+.
標(biāo)簽： routines driver P90 301
上傳時(shí)間： 2013-11-23
上傳用戶：weixiao99
The fundamental problem of communication is that of reproducing at one point either exactly or approximately a Message selected at another point. Frequently the Messages have meaning; that is they refer to or are correlated according to some system with certain physical or conceptual entities.
標(biāo)簽： 通信
上傳時(shí)間： 2013-10-31
上傳用戶：liuxinyu2016
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(shí)間： 2013-10-28
上傳用戶：cxl274287265
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