The word-serial protocol with the message-based interface is implemented by EPLD and DSP. The GPIB functions are implemented by programming to the GPIB control chip. The transfer from VXI messages to GPIB functions is implemented by DSP. 通过EPLD和DSP实现了VXI总线的消息基接口字串行协议,通过DSP对GPIB控制芯片的编程实现了GPIB总线各功能子集,VXI消息到GPIB功能子集的转换也通过DSP实现。