STM32F103中断标志位异常

问答
是否解决:	未解决

shenxiaolin_mai 回答时间：2022-11-18 11:21:13

show me the code

赞 0 评论

xmshao 回答时间：2022-11-18 11:51:18

如果出现某个事件标志位置位是因为发生相应事件。你好好检查下到底开启了哪些通道的比较事件、或捕获事件。还有，即使有相应事件发生以及相应标志位置1了，
如果你没使能相关事件的中断，也肯定不会因该事件而进中断的。

赞 0 评论

butterflyspring 回答时间：2022-11-18 11:55:32

从原理上推测可能是其他通道CCR中的值（默认值为0）撞到counter 的值发生了比较，然后硬件置位。只是看应用需不需去管它。不管它也没什么影响。

赞 0 评论

sdfsdfsdfty 回答时间：2022-11-18 13:11:11

shenxiaolin_mai 发表于 2022-11-18 11:21
show me the code

void TIM4_Init( u16 arr, u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure={0};
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};
NVIC_InitTypeDef  NVIC_InitStructure = {0};
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOD | RCC_APB2Periph_TIM1, ENABLE );
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15|GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( GPIOD, &GPIO_InitStructure );
TIM_TimeBaseInitStructure.TIM_Period = arr;
TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit( TIM4, &TIM_TimeBaseInitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_ARRPreloadConfig(TIM4, ENABLE);
TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE);
TIM_Cmd( TIM4, ENABLE );
}
void TIM4_IRQHandler(void)
{
if(TIM_GetITStatus(TIM4,TIM_IT_Update) == SET)
{
//       __disable_irq();
      GPIO_SetBits(GPIOD,GPIO_Pin_15);
      GPIO_ResetBits(GPIOD,GPIO_Pin_15);
//       __enable_irq();
      TIM_ClearFlag(TIM4,TIM_IT_Update);
}
}

int main(void)
{
USART_Printf_Init(115200);
printf("SystemClk:%d\r\n",SystemCoreClock);
TIM4_Init( 36000, 3-1);//144/3/36000=1.33KHz
while(1)
   {
      GPIO_SetBits(GPIOD,GPIO_Pin_14);
      GPIO_ResetBits(GPIOD,GPIO_Pin_14);
   };
}

赞 0 评论

sdfsdfsdfty 回答时间：2022-11-18 13:12:26

xmshao 发表于 2022-11-18 11:51
如果出现某个事件标志位置位是因为发生相应事件。你好好检查下到底开启了哪些通道的比较事件、或捕获事件 ...

void TIM4_Init( u16 arr, u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure={0};
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};
NVIC_InitTypeDef  NVIC_InitStructure = {0};
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOD | RCC_APB2Periph_TIM1, ENABLE );
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15|GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( GPIOD, &GPIO_InitStructure );
TIM_TimeBaseInitStructure.TIM_Period = arr;
TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit( TIM4, &TIM_TimeBaseInitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_ARRPreloadConfig(TIM4, ENABLE);
TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE);
TIM_Cmd( TIM4, ENABLE );
}
void TIM4_IRQHandler(void)
{
if(TIM_GetITStatus(TIM4,TIM_IT_Update) == SET)
{
//       __disable_irq();
      GPIO_SetBits(GPIOD,GPIO_Pin_15);
      GPIO_ResetBits(GPIOD,GPIO_Pin_15);
//       __enable_irq();
      TIM_ClearFlag(TIM4,TIM_IT_Update);
}
}

int main(void)
{
USART_Printf_Init(115200);
printf("SystemClk:%d\r\n",SystemCoreClock);
TIM4_Init( 36000, 3-1);//144/3/36000=1.33KHz
while(1)
   {
      GPIO_SetBits(GPIOD,GPIO_Pin_14);
      GPIO_ResetBits(GPIOD,GPIO_Pin_14);
   };
}
没有你说的那些，直接这样  在debug下看CC1IF/CC2IF/CC3IF/CC4IF全都会被置1

赞 0 评论

STM32F103中断标志位异常

所属标签

相似问题

官网相关资源