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我想产生随输入信号这样变化占空比的PWM，请问用28335该怎么实现呢
Jichao,
你这个波形是周期的吗？看去不对称啊，从PWM占空比的变化看没周期规律，建议在检查下；如果是周期变化的，请参考SPWM的调制方法，论坛搜索下很多。
是周期的，我画的不好，单极性的SPWM我会编写，可是这种三角波不是标准的增减计数模数的该怎么编程呢
