在DE 2开发板上，编写vhdl语言，建立8段数码管IP核，在nios ii中编写C语言程序，实现8段数码管数码有规律显示。(In the DE 2 development board, the preparation of VHDL language, the establishment of 8 sections of digital tube IP kernel, in Nios II written in C language program, to achieve the 8 sect