原子大哥,请教一下,我在用TIM1的PWM输入捕获功能测周期和占空比的时候,进入不了定时器中断函数处理函数,这是什么原因啊? 其中PWM脉冲是由TIM3产生的10kHz脉冲。
程序如下:
void Capture(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_ResetBits(GPIOA, GPIO_Pin_8);
TIM_DeInit(TIM1); //将外设TIM1寄存器重设为默认值
/*设置时间基准*/
TIM_TimeBaseStructure.TIM_Prescaler=0; //时钟频率的预分频值
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period=7200-1; //自动重装载寄存器周期值
TIM_TimeBaseStructure.TIM_ClockDivision=0x0; //时钟分割值
TIM_TimeBaseStructure.TIM_RepetitionCounter=0x0;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure); //初始化TIM1的时间基数数据
TIM_ICInitStructure.TIM_Channel= TIM_Channel_1;//选择通道2
TIM_ICInitStructure.TIM_ICPolarity= TIM_ICPolarity_Rising;//上升沿
TIM_ICInitStructure.TIM_ICSelection= TIM_ICSelection_IndirectTI;//通道方向选择
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;/*每次检测到捕获输入就触发一次捕获 */
TIM_ICInitStructure.TIM_ICFilter=0x00;/* 对分频率没有影响 选择输入比较滤波器*/
TIM_PWMIConfig(TIM1, &TIM_ICInitStructure); //根据参数配置TIM外设信息
TIM_SelectInputTrigger(TIM1, TIM_TS_TI1FP1); //选择IC1为始终触发源
TIM_SelectSlaveMode(TIM1, TIM_SlaveMode_Reset);//TIM从模式:触发信号的上升沿重新初始化计数器和触发寄存器的更新事件
TIM_SelectMasterSlaveMode(TIM1, TIM_MasterSlaveMode_Enable); //启动定时器的被动触发
TIM_ITConfig(TIM1, TIM_IT_CC1, ENABLE); //打开中断
TIM_Cmd(TIM1,ENABLE);
}
void TIM1_IRQHandler(void)
{
printf("进入TIM1_IRQHandler
");
TIM_ClearFlag(TIM1, TIM_IT_CC1);
}
友情提示: 此问题已得到解决,问题已经关闭,关闭后问题禁止继续编辑,回答。
你在初始化的时候,清零一下SR先.
{
printf("进入TIM1_IRQHandler ");
TIM_ClearFlag(TIM1, TIM_IT_CC1);
}
这里出了问题。
函数名不是这样的
资料说:
EXPORT TIM1_BRK_IRQHandler [WEAK]
EXPORT TIM1_UP_IRQHandler [WEAK]
EXPORT TIM1_TRG_COM_IRQHandler [WEAK]
EXPORT TIM1_CC_IRQHandler [WEAK]
EXPORT TIM2_IRQHandler [WEAK]
EXPORT TIM3_IRQHandler [WEAK]
EXPORT TIM4_IRQHandler [WEAK]
显然TIM1的中断和其他不一样,所以中断函数改成:
void TIM1_CC_IRQHandler(void)
就没有问题了
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
---------------------------------
我的时钟也使能啦,函数名也是TIM1_CC_IRQHandler(void) ,就是进不来捕捉中断,在中断里面把一个LED3熄灭,一直不成功,请大家指点下吧。
void TIM1_CC_Config( u16 arr,u16 psc )
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_ICInitTypeDef TIM1_ICInitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd( RCC_APB2Periph_TIM1, ENABLE ); //????TIM1?±??
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOE, ENABLE ); //????GPIOE?±??
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; //PE13 ?????®?°?è??
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //GPIO_Mode_IPD; //PE13 ????
GPIO_Init( GPIOE, &GPIO_InitStructure );
GPIO_ResetBits( GPIOE,GPIO_Pin_13 ); //PE13????
//???????¨?±?÷1 TIM1
TIM_TimeBaseStructure.TIM_Period = arr; //?è?¨?????÷×?????×°??
TIM_TimeBaseStructure.TIM_Prescaler =psc; //?¤·????÷
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //?è???±??·???:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò??????????
TIM_TimeBaseInit( TIM1, &TIM_TimeBaseStructure ); //?ù??TIM_TimeBaseInitStruct?????¨????????????TIMx???±???ù??????
//??????TIM1????????????
TIM1_ICInitStructure.TIM_Channel = TIM_Channel_3; //CC1S=01 ?????????? IC1??????TI1??
TIM1_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //??????????
TIM1_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //??????TI1??
TIM1_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //????????·???,??·???
TIM1_ICInitStructure.TIM_ICFilter = 0x00; //IC1F=0000 ???????????¨?÷ ?????¨
TIM_ICInit( TIM1, &TIM1_ICInitStructure );
//????·?×é??????
NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn; //TIM3????
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //??????????2??
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //????????0??
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±?????
NVIC_Init( &NVIC_InitStructure ); //?ù??NVIC_InitStruct?????¨???????????????èNVIC?????÷
TIM_ITConfig( TIM1,TIM_IT_Update | TIM_IT_CC3,ENABLE );//???í?ü?????? ,???íCC1IE????????
TIM_Cmd( TIM1,ENABLE ); //?????¨?±?÷5
}
/************************************************************************************
**?? ?? ??: TIM1_CC_IRQHandler( void )
**?? ??: TIM1????·???????
**????????: ??
**????????: ??
************************************************************************************/
u8 TIM1CH1_CAPTURE_STA = 0; //????????×???
u16 TIM1CH1_CAPTURE_VAL; //??????????
//?¨?±?÷5????·??????ò
void TIM1_CC_IRQHandler( void )
{
LED3_OFF( );
if(( TIM1CH1_CAPTURE_STA & 0x80 ) == 0 )//????????????
{
if( TIM_GetITStatus( TIM1, TIM_IT_Update ) != RESET )
{
if( TIM1CH1_CAPTURE_STA & 0X40 )//??????????????????
{
if(( TIM1CH1_CAPTURE_STA & 0x3F ) == 0x3F )//?????????¤??
{
TIM1CH1_CAPTURE_STA |= 0x80;//±ê????????????????
TIM1CH1_CAPTURE_VAL = 0xFFFF;
}
else
{
TIM1CH1_CAPTURE_STA++;
}
}
}
if( TIM_GetITStatus( TIM1, TIM_IT_CC1 ) != RESET )//????1·??ú????????
{
if( TIM1CH1_CAPTURE_STA & 0x40 ) //????????????????
{
TIM1CH1_CAPTURE_STA |= 0x80; //±ê??????????????????????
TIM1CH1_CAPTURE_VAL = TIM_GetCapture1( TIM1 );
TIM_OC1PolarityConfig( TIM1,TIM_ICPolarity_Rising ); //CC1P=0 ?è??????????????
}
else //????????,????????????????
{
TIM1CH1_CAPTURE_STA = 0; //????
TIM1CH1_CAPTURE_VAL = 0;
TIM_SetCounter( TIM1,0 );
TIM1CH1_CAPTURE_STA |= 0x40; //±ê????????????????
TIM_OC1PolarityConfig( TIM1,TIM_ICPolarity_Falling ); //CC1P=1 ?è??????????????
}
}
}
TIM_ClearITPendingBit( TIM1, TIM_IT_CC3 | TIM_IT_Update ); //????????±ê????
}
处理器是STM32F103VBT6,PE13
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