STM32单片机学习(6) PWM输出实验

式TIM_TimeBaseInit(TIM3, & TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位//((1+71[TIM_Prescaler] )/72M)*(1+499[TIM_Period] )=500us /* Configures the TIM3 in PWM Mode */TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;TIM_OC2Init(TIM3, & TIM_OCInitStructure); //此处用比较 2 寄存器,对应main函数 ，也可设置为 比较 1 寄存器TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable); //预装载器使能//ARR预装载缓冲器使能 TIM_ARRPreloadConfig(TIM3, ENABLE);TIM_Cmd(TIM3, ENABLE); //使能TIMx}