畢業(yè)設(shè)計 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)用越來越多,人們對網(wǎng)絡(luò)的要求也越來越高,為了適應(yīng)市場的需求,網(wǎng)卡出現(xiàn)了。它以其結(jié)構(gòu)簡單、成本低廉、兼容性強等諸多的優(yōu)越性得到了廣泛的應(yīng)用。由于網(wǎng)絡(luò)的應(yīng)用越來越廣泛,網(wǎng)卡的應(yīng)用也越來越多、功能越來越強大。開始時由于技術(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)卡開始在市場上得到廣泛的應(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)計與制作。論文首先對以太網(wǎng)進行了介紹,緊接著講了網(wǎng)卡的基本知識。隨后又對USB TO Gigabit LAN網(wǎng)卡的電路設(shè)計和制作進行了詳細(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。
基于幅移鍵控技術(shù)ASK(Amplitude-Shift Keying),以C8051F340單片機作為監(jiān)測終端控制器,C8051F330D單片機作為探測節(jié)點控制器,采用半雙工的通信方式,通過監(jiān)控終端和探測節(jié)點的無線收發(fā)電路,實現(xiàn)數(shù)據(jù)的雙向無線傳輸。收發(fā)電路采用直徑為0.8 mm的漆包線自行繞制成圓形空心線圈天線,天線直徑為(3.4±0.3)cm。試驗表明,探測節(jié)點與監(jiān)測終端的通信距離為24 cm,通過橋接方式,節(jié)點收發(fā)功率為102 mW時,節(jié)點間的通信距離可達(dá)20 cm。與傳統(tǒng)無線收發(fā)模塊相比,該無線收發(fā)電路在受體積、功耗、成本限制的場合有廣闊的應(yīng)用前景。
Abstract:
Based on ASK technology and with the C8051F340 and C8051F330D MCU as the controller, using half-duplex communication mode, this paper achieves bi-directional data transfer. Transceiver circuit constituted by enameled wire which diameter is 0.8mm and wound into a diameter (3.4±0.3) cm circular hollow coil antenna. Tests show that the communication distance between detection and monitoring of the terminal is 24cm,the distance is up to 20cm between two nodes when using the manner of bridging and the node transceiver power is 102mW. Compared with the conventional wireless transceiver modules, the circuit has wide application prospect in small size, low cost and low power consumption and other characteristics.