基于HDLC通信协议的CFSK板替代接口适配设计

Interface adaptation for CFSK board based on HDLC protocol

CTCS3-300H型ATP车载设备安全计算机通过HDLC通信接口与外围子系统进行信息交互,具有成熟稳定的特点。CTCS2-200C型ATP车载设备的CFSK板通信接口为串口RS-422,为了使CTCS2-200C型ATP车载设备的CFSK板在CTCS3-300H型ATP车载设备中实现轨道电路读取功能,需要进行接口适配设计与开发。通过设计轨道电路子系统通信板卡(简称:TCB板)实现串口RS-422和HDLC通信接口的转换功能,使得CFSK板适配CTCS3-300H型ATP车载设备安全计算机。

CTCS3-300 H ATP on-board equipment safety computer exchanges information with peripheral sub-system through HDLC communication interface. It has the characteristics of mature and stable. The RS-422 serial port was used for the CFSK board communication interface of CTCS2-200 C ATP on-board equipment. In order to make CFSK board used by CTCS2-200 C ATP implement the track circuit reading function in TCS3-300 H ATP on-board equipment, it was needed to design and develop the interface adaptation. The communication board of track circuit subsystem was designed to implement the conversion function between RS-422 serial port and HDLC communication interface, make CFSK board adapt to CTCS3-300 H ATP on-board equipment safety computer.