采用VHDL语言输入法，根据HDB3码编解码规则，确定HDB3码编画出HDB3码的程序设计流程图。编写VHDL源程序、调试及仿真时序波形 -Using VHDL language input method, according to the HDB3 encoding and decoding rules that determine HDB3 code HDB3 encoding and draw a flow chart programming. Write VHDL source co