USB Interface Design for Green House Environment Data Acquisition System

摘要

Universal Serial Bus (USB), as a communication interface specification, is widely applied to communication system between the personal computer and external device. The advantages of USB are of hot inserting and pulling operation, high-speed data transfer, high reliability and high expansibility. A green house environment data acquisition system applied the MCU (Micro Control Unit) AT89C52 and the specialized USB interface chip PDIUSBD12 was expatiated in this paper. The design of firmware and other relative software were also introduced.