DDS直接数字频率合成器，能产生正弦波，方波，锯齿波，三角波四种波形，同时能在12864上显示波形类型和频率，用FPGA verilog实现的-DDS direct digital frequency synthesizer can produce sine, square wave, sawtooth wave, triangle wave four waveform, while in the 12864 on display the waveform type and frequency

以Actel FPGA作为控制核心，通过自然采样法比较1个三角载波和3个相位差为1 200的正弦波，利用Verilog HDL语言实现死区时间可调的SPWM全数字算法，并在Fushion StartKit开发板上实现SPWM全数字算法。(With Actel FPGA as the control core, between 1 and 3 triangular carrier phase difference of 1200 sine wave by natural sampling, rea