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．
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.
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.
