利用at89c51和adc0809实现产生三角波，利用算法实现，具有清零的功能-At89c51 and adc0809 achieve the triangular wave generated using the algorithm, with clear features

用DAC0832生成锯齿波的图,使用protuse仿真的文件-If the programs are slightly changed, any waveform can be generated and output, such as triangle wave, square wave and zigzag wave, etc.