用DAC0832产生锯齿波、三角波我们鉴于实现了基本功能的基础上，扩展了使频率可调，调频范围为1—9999Hz。我们采用3*4键盘作为产生0—9的数字以及2个功能键（选择三角波和锯齿波-DAC0832 generated by sawtooth, triangle wave, we realize the basic functions of the light on the basis of the expanded so that an adjustable frequency, frequ