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stm32高级定时器pwm调试时输出,复位后不输出

经过查找后,问题的源头在于定时器配置的顺序有问题,换了配置的顺序就好了。之前先配置了定时器模式,再配置中断复位后不输出。之后先配置了中断,再配置定时器模式,工作正常。

/******************************************************************************                  
* @file     static void TIM3_GPIO_Config(void)
* @brief    定时器3 的引脚初始化
* @parameter    无
* @return          无
* @author            Love My BaoBaoGao                                                               
* @date               2018.12.15                        
******************************************************************************/
static void TIM1_GPIO_Config(void) 
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* GPIOA and GPIOB clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); 
	/* 设置TIM3CLK 为 72MHZ */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); 

  /* GPIOA and GPIOB clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); 

  /* GPIO复用功能初始化 */
  GPIO_InitStructure.GPIO_Pin =  Attract_Pushrod_Front_Pin;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;		    // 复用推挽输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(Attract_Pushrod_Front_Port, &GPIO_InitStructure);

  /* GPIO复用功能初始化 */
  GPIO_InitStructure.GPIO_Pin =  Attract_Pushrod_Reverse_Pin;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;		    // 复用推挽输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(Attract_Pushrod_Reverse_Port, &GPIO_InitStructure);

  /* GPIO复用功能初始化 */
  GPIO_InitStructure.GPIO_Pin =  Brush_Pushrod_Front_Pin;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;		    // 复用推挽输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(Brush_Pushrod_Front_Port, &GPIO_InitStructure);


  
}
  /******************************************************************************                  
* @file    static void TIM3_NVIC_Config(void)
* @brief    配置嵌套向量中断控制器NVIC
* @parameter    无
* @return          无
* @author            Love My BaoBaoGao                                                               
* @date               2018.12.15                        
******************************************************************************/
static void TIM1_NVIC_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  
  /* Configure one bit for preemption priority */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
  
  /* 配置TIM3_IRQ中断为中断源 */
  NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}
 /******************************************************************************                  
* @file     void DHT21_Init(void)
* @brief    配置TIM3输出的PWM信号的模式,如周期、极性、占空比

 * TIMxCLK/CK_PSC --> TIMxCNT --> TIMx_ARR --> TIMxCNT 重新计数
 *                    TIMx_CCR(电平发生变化)
 * 信号周期=(TIMx_ARR +1 ) * 时钟周期
 * 占空比=TIMx_CCR/(TIMx_ARR +1)
//定时器的周期为5ms。
 
* @parameter    无
* @return          无
* @author            Love My BaoBaoGao                                                               
* @date               2018.12.15                        
******************************************************************************/
static void TIM1_Mode_Config(void)
{
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;

  /* Time base configuration */		 
  TIM_TimeBaseStructure.TIM_Period = 100-1;       //当定时器从0计数到999,即为1000次,为一个定时周期
  TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock/100000)-1;	    //设置预分频:不预分频,即为72MHz
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;	//设置时钟分频系数:不分频(这里用不到)
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //向上计数模式
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  /* 配置定时器通道 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;	    //配置为PWM模式1
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 500;	//设置通道4的电平跳变值,输出另外一个占空比的PWM
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM1, &TIM_OCInitStructure);	//使能通道4
  TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
  TIM_ARRPreloadConfig(TIM1, ENABLE);			 // 使能TIM1重载寄存器ARR

  /* 配置定时器通道 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;	    //配置为PWM模式1
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 500;	//设置通道4的电平跳变值,输出另外一个占空比的PWM
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC2Init(TIM1, &TIM_OCInitStructure);	//使能通道4
  TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
  TIM_ARRPreloadConfig(TIM1, ENABLE);			 // 使能TIM1重载寄存器ARR

  /* 配置定时器通道 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;	    //配置为PWM模式1
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 500;	//设置通道4的电平跳变值,输出另外一个占空比的PWM
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC3Init(TIM1, &TIM_OCInitStructure);	//使能通道4
  TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
  TIM_ARRPreloadConfig(TIM1, ENABLE);			 // 使能TIM1重载寄存器ARR

  /* TIM1 enable counter */
  TIM_Cmd(TIM1, ENABLE);                   //使能定时器1

  TIM_CtrlPWMOutputs(TIM1, ENABLE);

  TIM_ITConfig(TIM1,TIM_IT_Update, ENABLE);
}

工作异常的配置

/******************************************************************************                  
* @file     void TIM3_Init(void)
* @brief    TIM3 输出PWM信号初始化,只要调用这个函数
  *         TIM3的四个通道就会有PWM信号输出
* @parameter    无
* @return          无
* @author            Love My BaoBaoGao                                                               
* @date               2018.12.15                        
******************************************************************************/
void TIM1_Init(void)
{
	TIM1_GPIO_Config();
 
	TIM1_Mode_Config();
       TIM1_NVIC_Config();
}

工作正常的配置

/******************************************************************************                  
* @file     void TIM3_Init(void)
* @brief    TIM3 输出PWM信号初始化,只要调用这个函数
  *         TIM3的四个通道就会有PWM信号输出
* @parameter    无
* @return          无
* @author            Love My BaoBaoGao                                                               
* @date               2018.12.15                        
******************************************************************************/
void TIM1_Init(void)
{
	TIM1_GPIO_Config();
    TIM1_NVIC_Config();
	TIM1_Mode_Config();
    
}

 

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