说明：  主要完成的是基于蓝牙技术的点菜系统中手持终端部分一系列功能的设计。本手持终端的设计以MSP430为核心，以蓝牙技术为基础，服务员可以通过手持终端录入客人点菜的菜单，并通过蓝牙模块将点菜数据发送出去。系统的硬件设计在满足了手持设备低功耗要求的同时，还实现了用户操作和蓝牙无线数据传输的功能。
(This thesis primarily designs a series of functions of the handheld terminal, which is part of the a la carte system based on Bluetooth technology. The design of the handset is to MSP430 as the core and with Bluetooth technology based. Waiters can enter a la carte menus through the handset and then a la carte data will be sent through the Bluetooth module. The hardware design in the system not only meets the low power requirements for handheld devices, but also implements user operation and Bluetooth wireless data transmission capabilities. )