Design and Implementation of an Automatic Testing System for MP3 Players

In this paper we design and implement an automatic testing system for MP3 players. The automatic testing system includes several kinds of program code. For instance, "source function table" provides the program of operation functions, "picture table" provides the picture display, "transfer table" provides the test module transformation, "button table" provides the press button test and the test program which is stored with the main program of the MP3 player in the NAND flash. When the operator turns the MP3 player on, the first flag decides whether the test program will go into "automatic test mode" or "normal mode". When the first flag points at the automatic test mode, the MP3 player executes the test program from the NAND Flash. It also guides the operator in carrying out the tests, such as sound effects, OLED display, record module, line in module, lock and press button.