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 s