此次设计要求完成的任务是基于DSP的原理基础上设计一个能够产生方波、三角波、阶梯波，波形可选择，且参数可调得波形发生器。-The design requirements of the tasks is based on the principle of DSP based on the design to produce a square wave, triangle wave, step-wave, waveform choice, and the adjustable parameters