AD9833芯片DDS产生各种信号发生的程序，该程序能直接合成频率，且性噪比极好，这是本人在公司里设计到用到的成熟程序，单片机at89c55上正常使用极多次。-AD9833 DDS chip produces a variety of signal generation program, the program can be directly synthesized frequency, and excellent noise ratio, this is my design to be used in the company s mature program, the microcontroller at89c55 normal use very many times.