Android平台下AOA协议的PWM控制系统

Android开放配件(AOA)协议是一种Android终端通过USB总线与Android配件进行通信的协议,该协议为Android终端应用于设备控制和数据采集领域提供了条件。在一些设备控制应用中,有采用Android设备作为控制终端的需求。针对该问题,提出了一个通过Android手机控制Android配件UMFT311EV开发板生成PWM信号的系统。系统基于Android开放配件协议,通过操作Android手机界面控制PWM信号的周期和占空比。首先介绍了系统构成,然后给出了Android终端软件的具体实现,最后以驱动舵机为例进行系统测试。系统实现了Android手机产生参数可控的PWM信号。

PWM Control System on Android Platform Based on AOA Protoco

Android Open Accessory （AOA） protocol is a communication protocol, using which Android-powered terminals can communi- cate with accessories by USB. This protocol provides a condition for Android-powered devices to apply to the fields of device control and data acquisition system. In some equipment control applications, Android-powered devices are required to act as the control terminal. Aiming at this problem, a system of generating PWM signal is introduced in this paper. The system uses an Android-powered smart phone as the control terminal, by USB communication between the smart phone and the Android accessory UMFT311EV based on AOA protocol, to control the generation of PWM signal, including the period and cycle duty. Firstly, the system architecture is introduced; then the Android software realization is analyzed; finally, driving a steering engine is taken as an example, and testing on actual devices is carried out. The system realizes the function of generating and controlling PWM signal through the Android-powered smart phone.