The communication way for traditional laser equipment mainly uses parallelinterface, 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。
2
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。
3
Parallelinterface 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.