掌机源码，可供掌机开发者参考学习，适用性很强。在我公司PDA中广泛使用，可参考用来开发其他功能，支持红外和串口通讯。-Handheld source for handheld developer reference study, the applicability is strong. PDA in our company are widely used, refer to the development of other features, support for infrared and serial communications.