说明：  1. 系统架构设计： 确定需要产生的波形类型，输出信号幅度和频率范围，控制方式和界面等。本设计需要产生三角波和锯齿波，输出信号幅度为0-5V，频率范围为1kHz和2kHz。控制方式使用两个按键进行控制，其中一个按键控制波形类型的选择，另一个按键控制频率的选择。界面采用OLED显示屏幕进行波形类型和频率的显示。
(1. System architecture design: Determine the type of waveform to be generated, output signal amplitude and frequency range, control method and interface, etc. This design requires the generation of triangular and sawtooth waves, with an output signal amplitude of 0-5V and a frequency range of 1kHz and 2kHz. The control method uses two buttons for control, one button controls the selection of waveform type, and the other button controls the selection of frequency. The interface uses an OLED display screen to display waveform types and frequencies.)