Design of USB multi-function data acquisition system based on MCF52223

Abstract

With reference to the idea of USB OTG dual role,and based on the microcontroller MCF52223 which is integrated with USB2.0 module produced by Freescale Corporation,this paper put forward the concept of two-programming-models: "Self Data Acquisition" and "Non-self Data Acquisition",realized the function of configurable embedded USB host,and completed the read-write and inquiry of the U-disk,and made U-disk become the external mass storage devices and query database.This acquisition system stable usage in the meeting attendance system based on second-generation ID card shows that the design makes the data query,storage and read more convenient and can easily switch to non-self data acquisition mode,which can be referred by similar applications.