基于单片机的多并行接口设备数据传输的集成和控制

在要求传输距离近,通信速度快的数据采集应用中,如CCD、视频数据采集,往往采用并行接口方式。该文针对目前多并行接口设备数据传输方式中采用多计算机收集数据和采用并行接口数据采集卡存在的不足,提出了采用单片机对多台利用并行接口进行数据传输的设备进行集成和控制,完成数据的传输。在数据传输中,针对计算机的标准并行接口,及所有外围设备的数据线是共用,而控制线则需要独立地和计算机建立握手协议的特点,通过单片机接管外围设备的控制线,完成对多设备数据传输的集成和控制。该方法已经在近景三维测量系统中得到了应用,并取得了满意的结果。

Integration and Control of Multiple Parallel Interface Devices for Data Transfer Based on Micro-controller Chip

Parallel interface is usually adopted in the applications of data acquisition that need close -range data transfer and fast communication,such as CCD and video data acquisition.Focusing on the disadvantage of current data transfer approaches,such as using multiple computers synchronously collecting data or using an extended parallel interface data sampling card for data transfer,the approach of integration and control of multiple parallel interface devices for data transfer based on micro-controller is proposed.Because the parallel port of computer is standard,the data bus is shared among the peripheral devices,and the control bus of peripheral devices is independently communicated with computer,the micro -controller can manage the control bus of peripheral devices to finish the integration and control of the system.The approach has been applied in the close range scene three -dimensional measurement system,and the satisfactory result has been obtained.