基于双模式USB接口的便携式比色计设计

Design of Portable Colorimeter based on Double-mode USB Interface

本文设计一种以C8051F020单片机为处理器,双模式USB为接口的比色计仪器。该仪器可以工作在USB设备和主机两种模式。在设备模式下,能直接与计算机进行数据通信;在主机模式下,能读写U盘,通过U盘进行数据的传输。仪器采用双USB插座,由单片机判断确定设备的工作方式。

A portable colorimeter instrument is designed. This instrument uses the C8051F020 MicroController Unit as the processor and uses double-mode USB as interface. It accomplishes the slave-mode and host-mode of USB. In slave-mode, the system could communicate directly with computer; In host-mode, it could read-write flash memory to transmit data. It has two USB plug seats and exchanges automatically the corresponding work mode by the Single Chip Machine.