用两个按键通过单片机控制DAC0832的输出，使OUT端可以输出0—5V的幅值，频率为1KHZ的锯齿波和三角波两种波形。通上电源后；按下INT1则输出三角波，在按下INT0输出锯齿波。-MCU control with two buttons through the DAC0832 output to OUT terminal can output 0-5V amplitude, frequency of the sawtooth wave and triangular wave 1KHZ two waveforms. Through the power on　press INT1 the output triangle wave, sawtooth wave output in the press INT0.