这是用vhdl编写的三角波产生程序，比较简单，但是对于开发学者的思维还是有帮助的。当时我受益颇多，拿出分享。-This is a program used to generate the triangular wave vhdl written, relatively simple, but for the development of academic thinking is helpful. At that time, I benefited a lot, come to share.