Introduction - If you have any usage issues, please Google them yourself
Using C language written in a very simple procedure, it is a modular language, a compilation of more senior than the language, but is a language still has its shortcomings: it is very bad delay control , we have a period of latency is often difficult to know the exact process it in the end is how much delay, which delay the procedures and compilation of no-fat ratio. After the writing process but sometimes had to use the delay to the more accurate, although that can be mixed programming solution, but not this way everyone can grasp, and also the trouble to write. Therefore, let us pass the test to provide a time delay subroutine modules, and thus to one of our frequently used forms of data latency