说明：  单片机MSP430和无线传输模块NRF905的无线传输系统。利用系统总线spi实现了两者的通信，能够实现无线传输功能。
(Single-chip MSP430 and the wireless transmission module of the wireless transmission system NRF905. Spi use of system bus to achieve the two communications, wireless transmission function can be achieved.)