对 CC2420 寄存器进行初始化，设置CC2420 寄存器数值，并读取设置的寄存器的数值。

本实验以CC2420 中的MDMCTRL0 为例，进行设置，并读取其设置的数值在串口工具上显

示出来。-Initialization of the CC2420 registers set CC2420 register values, and read the register set value. In this experiment, CC2420 in MDMCTRL0, for example, be set and read the value of its settings in the serial port tools displayed.