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标题: STM32 PWM 占空比可变函数（2） [打印本页]

作者: yuyang911220 时间: 2014-11-19 21:55 标题: STM32 PWM 占空比可变函数（2）

//PB7: TM4 Channel2
  /* PWM1 Mode configuration: Channel2 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse =  (uint16_t)(PWM_CLK1M_ARR_10K)*duty/100; ;  TIM_OC2Init(TIM4, &TIM_OCInitStructure);
  TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);
#if 0
  /* PWM1 Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR4_Val;
  TIM_OC4Init(TIM3, &TIM_OCInitStructure);

  TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
#endif
  TIM_ARRPreloadConfig(TIM4, ENABLE);
  /* TIM4 enable counter */
  TIM_Cmd(TIM4, ENABLE);
/* TIM4 Main Output Enable */
  TIM_CtrlPWMOutputs(TIM4, ENABLE);
}

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