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  • 基于C8051F040的以太網(wǎng)-CAN轉(zhuǎn)換電路設(shè)計

    以太網(wǎng)和CAN總線應(yīng)用廣泛,但由于其通信協(xié)議不同,兩種總線器件間無法進(jìn)行數(shù)據(jù)通信,因此,設(shè)計了基于CP2200與C8051F040的以太網(wǎng)總線與CAN總線接口轉(zhuǎn)換電路,并給出部分相關(guān)硬件電路與軟件設(shè)計分析。在保證數(shù)據(jù)完整和協(xié)議可靠的前提下,通過握手協(xié)議和簡化的以太網(wǎng)協(xié)議,不僅實(shí)現(xiàn)了以太網(wǎng)數(shù)據(jù)與CAN數(shù)據(jù)的轉(zhuǎn)發(fā),同時還順利的解決了以太網(wǎng)的高速性與CAN的低速率沖突,以及兩者數(shù)據(jù)包之間的大小不同的矛盾。 Abstract:  In the development of actual application, Ethernet and CAN bus are used very extensively. Owing to its various communication protocols, the communicating between two kinds of bus device can’t be carried out. Therefore, in order to solve this problem, the Ethernet-CAN bus interface circuit based on CP2200 and C8051F040 was designed in this paper, and part of the related hardware circuit and software design analysis were given. On the condition of data’s integrity and protocols’reliability, through the handshaking protocols and the simplified the Ethernet protocol, not only the data switching between CAN and Ethernet was realized, but also the differ in velocity and packet size was solved.

    標(biāo)簽: C8051F040 CAN 以太網(wǎng) 轉(zhuǎn)換

    上傳時間: 2013-10-15

    上傳用戶:Ants

  • LTC4310絕緣雙向I2C總線通信方案

    Linear 公司的LTC4310是絕緣的雙向I2C總線通信器件,每個器件可把I2C邏輯狀態(tài)編碼成信號,通過絕緣層傳輸?shù)搅硪粋€器件.接收器件解碼,并驅(qū)動I2C總線到適當(dāng)?shù)拇_邏輯狀態(tài).主要用在絕緣的I2C, SMBus和PMBus 接口,絕緣電源,以太網(wǎng)供電和正到負(fù)電源通信.本文介紹了LTC4310主要特性,典型應(yīng)用以及多種應(yīng)用電路框圖.    

    標(biāo)簽: 4310 LTC I2C 絕緣

    上傳時間: 2013-11-02

    上傳用戶:trepb001

  • 單片機(jī)與PLC之間遠(yuǎn)距離通信的實(shí)現(xiàn)

    摘要:在工業(yè)自動控制中,單片機(jī)與PLC的遠(yuǎn)距離通信是一個難點(diǎn)與熱點(diǎn)問題。本文設(shè)計了S7-200PLC與PIC16F877單片機(jī)實(shí)現(xiàn)遠(yuǎn)距離串行通信的硬件連接和軟件實(shí)現(xiàn)方法。本文采用了MAX485E芯片進(jìn)行TTL電平與差分信號之間的轉(zhuǎn)換,使用RS-485端口和半雙工模式進(jìn)行通信。最后通過異或校驗碼對接收到的數(shù)據(jù)進(jìn)行核對,以進(jìn)一步提高數(shù)據(jù)傳輸?shù)目煽啃浴?shí)驗證明,該方法成功實(shí)現(xiàn)了單片機(jī)與PLC的遠(yuǎn)距離通信,并且具有開發(fā)簡單,抗干擾能力強(qiáng)的特點(diǎn),具有一定實(shí)用價值。關(guān)鍵詞:單片機(jī)  PLC  串行通信

    標(biāo)簽: PLC 單片機(jī) 遠(yuǎn)距離通信

    上傳時間: 2014-12-27

    上傳用戶:YUANQINHUI

  • 2.4GHz PTR4000無線嵌入式模塊高速率1Mbps、

    產(chǎn)品特性2.4Ghz全球開放ISM頻段,免許可證使用最高工作速率1Mbps,高效GMSK調(diào)制,抗干擾能力強(qiáng),特別適合工業(yè)控制場合125頻道,滿足多點(diǎn)通信和跳頻通信需要內(nèi)置硬件CRC檢錯和點(diǎn)對多點(diǎn)通信地址控制低功耗1.9~3.6V工作Power Down模式下狀態(tài)僅為1uA內(nèi)置2.4Ghz天線,體積小巧約24x24mm不包括天線模塊可軟件設(shè)地址,只有收到本機(jī)地址時才會輸出數(shù)據(jù)(提供中斷指示,可直接接各種單片機(jī)使用,軟件編程非常方便內(nèi)置專門穩(wěn)壓電路,使用各種電源包括DC/DC開關(guān)電源均有很好的通信效果標(biāo)準(zhǔn)DIP間距接口便于嵌入式應(yīng)用PTR4000-Quick-DEV快速開發(fā)系統(tǒng),含開發(fā)板、源代碼、原理圖等詳細(xì)資料,即開即用,上手快,縮短您的開發(fā)時間

    標(biāo)簽: 1Mbps 4000 2.4 GHz

    上傳時間: 2013-10-12

    上傳用戶:sz_hjbf

  • 基于ISA總線的計算機(jī)與DSP的通信

    在開放式數(shù)控系統(tǒng)結(jié)構(gòu)模型的基礎(chǔ)上,研究了基于ISA總線的DSP通信控制原理。采用中斷方式完成了PC機(jī)和DSP之間的通信。介紹了以DriverWorks為工具開發(fā)ISA設(shè)備WDM驅(qū)動程序的方法,探討了中斷處理、驅(qū)動程序與應(yīng)用程序之間的通信,簡要說明了驅(qū)動程序的安裝與調(diào)試。通過調(diào)試,系統(tǒng)設(shè)計運(yùn)行穩(wěn)定。 Abstract:  The ISA bus and DSP correspondence control principle is investigated in the basis of the existing open architecture numerical control system.The interrupt method is used to realize the communication between PC and DSP based on the ISA bus.The methods of WDM driver exploitation for ISA device using Driver Works are introduced.The main process of driver program and the keys such as handle interrupt and the communication between the drivers and application are presented.And how to debug and install the drive is explained.

    標(biāo)簽: ISA DSP 總線 計算機(jī)

    上傳時間: 2013-11-04

    上傳用戶:kang1923

  • AN1071用于MICROCHIP 16位單片機(jī)的IRDA標(biāo)

    簡介 紅外通信是實(shí)現(xiàn)兩臺設(shè)備間無線、點(diǎn)對點(diǎn)通信的一種低成本方法。成立于1994年的INFRARED DATA ASSOCIATION(常簡稱為IRDA)致力于開發(fā)短距離紅外傳輸通信的標(biāo)準(zhǔn)方法。這些標(biāo)準(zhǔn)已經(jīng)過持續(xù)改進(jìn),使用日益廣泛。現(xiàn)在,眾多設(shè)備實(shí)現(xiàn)了IRDA標(biāo)準(zhǔn)規(guī)范,包括計算機(jī)、打印機(jī)、PDA、手機(jī)、手表和其他儀器。

    標(biāo)簽: MICROCHIP 1071 IRDA AN

    上傳時間: 2013-11-11

    上傳用戶:xzt

  • 基于MSP430F149的智能電池巡檢系統(tǒng)的設(shè)計

    介紹了電力操作電源與智能電池巡檢系統(tǒng)的特點(diǎn),給出了一種基于超低功耗單片機(jī)MSP430 F149針對中小型變電站自動化運(yùn)行的專用設(shè)備的基本設(shè)計原理及實(shí)現(xiàn)方法,最后給出了詳細(xì)硬件構(gòu)成和軟件實(shí)現(xiàn)。該系統(tǒng)能滿足中小型變電站安全、可靠、自動運(yùn)行的要求,并通過與上位機(jī)的串行通信實(shí)現(xiàn)變電站的遠(yuǎn)程管理和控制。 Abstract:  The characters of the intelligent battery data logging system of the electric operation power are introduced.The basic design principle and the implemented methods of the special equipment which only designed for the middle or small transformer substation based on MSP430F149 are prescribed. Finally, the hardware block diagram and the software flow chart are also given. The function that the system finally needs to realize can basically meet with the middle or small transformer substation’s satisfy, reliably,and automatic running.And it can also realize the transformer substation long-distance management and control by serial communicating with the host computer.

    標(biāo)簽: 430F F149 MSP 430

    上傳時間: 2013-11-25

    上傳用戶:黃華強(qiáng)

  • 基于C8051F930的管道溫度壓力遠(yuǎn)程監(jiān)測系統(tǒng)

       為解決輸油管道溫度壓力參數(shù)實(shí)時監(jiān)測的問題,設(shè)計了以C8051F930單片機(jī)作為控制核心的超低功耗輸油管道溫度壓力遠(yuǎn)程監(jiān)測系統(tǒng)。現(xiàn)場儀表使用高精度電橋采集數(shù)據(jù),通過433 MHz短距離無線通信網(wǎng)絡(luò)與遠(yuǎn)程終端RTU進(jìn)行通信,RTU通過GPRS網(wǎng)絡(luò)與PC上位機(jī)進(jìn)行遠(yuǎn)程數(shù)據(jù)傳輸,在上位機(jī)中實(shí)現(xiàn)數(shù)據(jù)存儲和圖形化界面顯示,從而實(shí)現(xiàn)輸油管道溫度壓力參數(shù)的實(shí)時監(jiān)測和異常報警。經(jīng)實(shí)驗證明,該系統(tǒng)的12位數(shù)據(jù)采集精度滿足設(shè)計要求,漏碼率小于1%,正常工作時間超過5個月,能實(shí)時有效地監(jiān)測輸油管道的溫度壓力參數(shù),節(jié)省大量人工成本,有效預(yù)防管道參數(shù)異常造成的經(jīng)濟(jì)損失和環(huán)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.

    標(biāo)簽: C8051F930 溫度 壓力 遠(yuǎn)程監(jiān)測系統(tǒng)

    上傳時間: 2013-11-07

    上傳用戶:cuibaigao

  • 基于MSP430單片機(jī)和DS18B20的數(shù)字溫度計

    為了在工業(yè)生產(chǎn)及過程控制中準(zhǔn)確測量溫度,設(shè)計了一種基于低功耗MSP430單片機(jī)的數(shù)字溫度計。整個系統(tǒng)通過單片機(jī)MSP430F1121A控制DS18B20讀取溫度,采用數(shù)碼管顯示,溫度傳感器DS18B20與單片機(jī)之間通過串口進(jìn)行數(shù)據(jù)傳輸。MSP430系列單片機(jī)具有超低功耗,且外圍的整合性高,DS18B20只需一個端口即可實(shí)現(xiàn)數(shù)據(jù)通信,連接方便。通過多次實(shí)驗證明,該系統(tǒng)的測試結(jié)果與實(shí)際環(huán)境溫度一致,除了具有接口電路簡單、測量精度高、誤差小、可靠性高等特點(diǎn)外,其低成本、低功耗的特點(diǎn)使其擁有更廣闊的應(yīng)用前景。 Abstract:  In order to obtain accurate measuring temperature in industrial production and process control, a digital thermometer based on MSP430 MCU is designed. The system uses MSP430F1121A MCU to control DS18B20, and gets the temperature data, which is displayed on the LED. The temperature sensor DS18B20 and MCU transmit data through serial communication. MSP430 series has ultra-low power and high integration, DS18B20 only needs one port to achieve data communication. Through many experimental results prove, this system is consistent with actual environment temperature. The system has characteristics of interface circuit simple, high measuring accuracy, minor error, high reliability, besides, the characteristics of low cost and low power make it having vaster application prospect.

    標(biāo)簽: MSP 430 18B B20

    上傳時間: 2013-10-16

    上傳用戶:wettetw

  • 基于PN532的接觸式和非接觸式讀卡器設(shè)計

    介紹了一款可以同時讀寫接觸式卡和非接觸式卡的多功能讀卡器,詳細(xì)闡述了射頻芯片PN532和主控芯片ST2211的外圍硬件電路和整個讀卡器的軟件構(gòu)架。同時對讀卡器電源管理、低功耗設(shè)計、多通信方式融合等進(jìn)行了較詳細(xì)的分析

    標(biāo)簽: 532 PN 接觸式 非接觸式

    上傳時間: 2013-10-23

    上傳用戶:chongchongsunnan

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