自己瞎玩了个stm32出PWM脉波的程序，用按键控制改变PWM波 -

标题: 自己瞎玩了个stm32出PWM脉波的程序，用按键控制改变PWM波 [打印本页]

作者: xiaolangwj 时间: 2017-6-27 10:05
标题: 自己瞎玩了个stm32出PWM脉波的程序，用按键控制改变PWM波
直流电机可能需要控制速度，自己做了个小车，通过按键来控制直流电机的转速。
我用的事stm32f103的型号。
附上一段主要的程序。
static void TIM3_Mode_Config(void)
{
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      TIM_OCInitTypeDef  TIM_OCInitStructure;

  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 999;
  TIM_TimeBaseStructure.TIM_Prescaler = 0;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  /* PWM1 Mode configuration: Channel1 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 375;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM3, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /* PWM1 Mode configuration: Channel2 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 375;
  TIM_OC2Init(TIM3, &TIM_OCInitStructure);
  TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);

  TIM_ARRPreloadConfig(TIM3, ENABLE);
  /* TIM3 enable counter */
  TIM_Cmd(TIM3, ENABLE);
}

void TIM3_Mode_REConfig(void)
{
      //TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      TIM_OCInitTypeDef  TIM_OCInitStructure;
      int CCR1_Val[] = {0,100,200,300,400,500,600,700,800,900};
  int CCR2_Val[] = {0,100,200,300,400,500,600,700,800,900};

      printf("111=%u\n",CCR1_Val[shift1]);
      TIM_Cmd(TIM3, DISABLE);
  /* PWM1 Mode configuration: Channel1 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR1_Val[shift1];
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High；

  TIM_OC1Init(TIM3, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /* PWM1 Mode configuration: Channel2 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR2_Val[shift2];
  TIM_OC2Init(TIM3, &TIM_OCInitStructure);
  TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
  TIM_ARRPreloadConfig(TIM3, ENABLE);
  /* TIM3 enable counter */
  TIM_Cmd(TIM3, ENABLE);
      printf("222\n");
}

发的比较着急，大家有问题留言。

1键值改变PWM脉宽.7z

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作者: xiaolangwj 时间: 2017-6-27 10:05
建议下载附件调试。

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