基于stm32的dac-dma正弦电压波形输出，采用数学库的sin函数，而非查表方式-The dac-dma-based stm32 sinusoidal voltage waveform output, using math library sin function, rather than look-up table

基于STM32为单片机的TIM+DAC+DMA输出任意波形的信号发生器。可产生不同的波形，并且产生不同的频率和不同的幅值，是新手入门信号时发生器的首选。-Based on the STM32 MCU TIM+ DAC+ DMA output arbitrary waveform signal generator.Can produce different waveform, and produce different frequency and different amplitude, is t