通过STM32控制AD9833芯片，实现利用按键切换正弦波、方波、三角波三种波形并控制频率10hz或20hz步进，全部有LCD显示。并可用蓝牙串口设置任意波形和频率-By STM32 AD9833 chip control, using the key switch sine wave, square wave, triangle wave frequencies, which are three kinds of waveform control 10 hz or 20 hz step, al