该程序是用at9851单片机控制ad9851芯片产生正弦波的程序，正弦波的频率和相位可以提前设定，用该方法产生的正弦波输出频率高。-The program is using at9851 SCM and ad9851 chip generated since wave of the program,since wave frequency and phase can be set in advance,using this method genarated high frequency sinc