The realization of digital controller based on CPLD chip

The paper introduces a new digital controller realized by single-chip microcomputer and CPLD.Control arithmetic is designed with the VHDL language and realized on the CPLD hardware;single -chip microcomputer on-line programs the CPLD chip and several different control arithmetic on the CPLD can be switched.So now the arithmetic of the controller isn't realized by the software of single -chip microcomputer but CPLD hardware,the advantage of hardware arithmetic and single-chip microcomputer is put together.CPLD controller arithmetic can be switched conveniently according to different control object and control request so as to gain satisfying control effect.