STM32的TIM1互补PWM输出

芯片为STM32F412VETx,使用的是高级定时器TIM1的PWM互补PWM输出,看一下STM32CubeMX配置,

再看时钟的配置,TIM1用的是APB2的时钟

再看引脚的配置

产生的PWM频率为:Fpwm = 96MHz / ((95+1)(9999+1)) =100Hz,占空比为50%
然后生成代码,看下代码中的FMX_TIM1_Init函数初始化

/* TIM1 init function */
static void FMX_TIM1_Init(void)
{
 
  TIM_ClockConfigTypeDef sClockSourceConfig;
  TIM_MasterConfigTypeDef sMasterConfig;
  TIM_OC_InitTypeDef sConfigOC;
  TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig;
 
  htim1.Instance = TIM1;
  htim1.Init.Prescaler = 95;
  htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim1.Init.Period = 9999;
  htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim1.Init.RepetitionCounter = 0;
  if (HAL_TIM_Base_Init(&htim1) != HAL_OK)  //使能TIM1时钟
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim1, &sClockSourceConfig) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
  if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 5000;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
  sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
  sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
  sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
  sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
  sBreakDeadTimeConfig.DeadTime = 0;
  sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
  sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
  sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
  if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
  HAL_TIM_MspPostInit(&htim1);  //引脚配置
 
}

好了到此TIM1的PWM互补已经配置完成,接下来就是要是要使能PWM输出了,接下在再main函数中使能输出就OK了。

    HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);    //starts PWM on CH1 pin
    HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_1); //starts PWM on CH1N pin

最好用示波器看下效果图

打包工程文件打包上传,有需要二可以参考,地址:STM32F412使用TIM1输出互补的PWM


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