畢業(yè)設(shè)計(jì) USB TO Gigabit LAN 網(wǎng)卡 隨著網(wǎng)絡(luò)技術(shù)飛速發(fā)展,多媒體的應(yīng)用越來(lái)越多,人們對(duì)網(wǎng)絡(luò)的要求也越來(lái)越高,為了適應(yīng)市場(chǎng)的需求,網(wǎng)卡出現(xiàn)了。它以其結(jié)構(gòu)簡(jiǎn)單、成本低廉、兼容性強(qiáng)等諸多的優(yōu)越性得到了廣泛的應(yīng)用。由于網(wǎng)絡(luò)的應(yīng)用越來(lái)越廣泛,網(wǎng)卡的應(yīng)用也越來(lái)越多、功能越來(lái)越強(qiáng)大。開(kāi)始時(shí)由于技術(shù)方面的限制,網(wǎng)卡只有10Mbps的吞吐量,由于網(wǎng)絡(luò)技術(shù)的發(fā)展,100Mbps吞吐量的網(wǎng)卡開(kāi)始在市場(chǎng)上得到廣泛的應(yīng)用。而現(xiàn)在1000Mbps吞吐量的網(wǎng)卡的出現(xiàn)又給網(wǎng)絡(luò)的傳輸帶來(lái)了新的活力。 論文中主要闡述了基于以太網(wǎng)的USB TO Gigabit LAN網(wǎng)卡的設(shè)計(jì)與制作。論文首先對(duì)以太網(wǎng)進(jìn)行了介紹,緊接著講了網(wǎng)卡的基本知識(shí)。隨后又對(duì)USB TO Gigabit LAN網(wǎng)卡的電路設(shè)計(jì)和制作進(jìn)行了詳細(xì)的描述。論文還包括了USB TO Gigabit LAN網(wǎng)卡的調(diào)試等內(nèi)容。
為解決當(dāng)前計(jì)算機(jī)串行通訊接口只有USB,難以滿足舊型號(hào)設(shè)備或某些單片機(jī)要求RS232通訊的問(wèn)題,設(shè)計(jì)出兩款RS232/USB電路。采用CH341A與MAX223集成電路芯片構(gòu)建標(biāo)準(zhǔn)9線RS232/USB通用接口轉(zhuǎn)換器,無(wú)需編程。采用CH341A與PIC16F877A構(gòu)建單片機(jī)與計(jì)算機(jī)之間的USB通訊電路,軟件遵循RS232通訊協(xié)議,硬件進(jìn)行電平轉(zhuǎn)換。實(shí)際使用表明,這兩款產(chǎn)品與計(jì)算機(jī)端Windows 操作系統(tǒng)下的串口應(yīng)用程序完全兼容,且通訊過(guò)程中無(wú)握手失敗現(xiàn)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.