The communication way for traditional laser equipment mainly uses parallel interface, novel communication technology has been applied widely due to the enhancement of technology.
传统的激光设备通讯方式主要采用并行接口，而随着技术的增强，新的通讯技术得到了广泛应用。
For communication among parallel print port of PC and multiple single-chips, interface is divided into data, state and control groups respectively controlled by each register.
PC并行打印口与多台下位单片机的通讯，将接口分成数据、状态、控制三组，由其寄存器分别控制。
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.
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。
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