Design of USB host interface based on STM32F103

Embedded USB host system has very fine application prospects in the fields of data stores and data exchanges.To store and manage mass data in embedded system,one method is to construct an USB device interface in embedded system.The embedded system uploads data from RAM in itself to upper computer continuously in communication mode.Another method is to build an USB host interface in embedded system.Then the embedded system can read/write U disk,SD card or other removable devices directly.The data stored in removable devices can be transferred to upper computer easily without any directly connection between embedded system and upper computer.This article used the USB controller chip CH376 to design the USB host interface based on STM32F103,which was used in embedded systems.