stm32f103C8T6 TIM3匹配中断不能做执行，请大神指点下

[小杨电子]

void Tim3_CH1_Init(u16 per,u16 psc)
{
TIM_TimeBaseInitTypeDef TiM_TimeBaseInitStructure;//设置定时器，分频系数，和频率
NVIC_InitTypeDef NVIC_InitStructure; //NVIC配置
GPIO_InitTypeDef GPIO_InitStructure; //GPIO结构体初始化
TIM_OCInitTypeDef TIM_OCInitStructure;//定时器复用结构体初始化
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM3, ENABLE); //使能TIM3定时器时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);//使能端口时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); //使能复用时钟


GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;//复用推挽模式
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);

// GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3,ENABLE);//复用引脚部分映射 // 64 100 144引脚具有重映射功能
// GPIO_PinRemapConfig(GPIO_FullRemap_TIM3,ENABLE);//复用引脚完全映射

TiM_TimeBaseInitStructure.TIM_Period=per-1; //设置频率
TiM_TimeBaseInitStructure.TIM_Prescaler=psc; //分频系数
TiM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_CenterAligned2;//中心对其模式2计数,向上计数匹配产生中断
TiM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TiM_TimeBaseInitStructure.TIM_RepetitionCounter=0;
TIM_TimeBaseInit(TIM3,&TiM_TimeBaseInitStructure);

//TIM3 NVIC 配置
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器
//TIM3CH1匹配比较输出配置
TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse=450;
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;

TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCIdleState_Reset;
TIM_OC1Init(TIM3,&TIM_OCInitStructure);
TIM_OC2Init(TIM3,&TIM_OCInitStructure);
/* 自动输出使能,中断,死区相关的设置*/
TIM_BDTRInitStructure.TIM_OSSRState=TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState=TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel=TIM_LOCKLevel_1;
TIM_BDTRInitStructure.TIM_DeadTime=12;
TIM_BDTRInitStructure.TIM_Break=TIM_Break_Disable;//关闭外部break功能
TIM_BDTRInitStructure.TIM_BreakPolarity=TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput=TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM3,&TIM_BDTRInitStructure);
TIM_CtrlPWMOutputs(TIM3, ENABLE);


TIM_ClearITPendingBit(TIM3,TIM_IT_CC1);//清楚中断标志位

TIM_ITConfig(TIM3,TIM_IT_CC1,ENABLE); //中断匹配1使能
TIM_OC1PreloadConfig(TIM3,TIM_OCPreload_Enable);//输出比较通道1预装载寄存器CCR1,使能
TIM_ARRPreloadConfig(TIM3,ENABLE);//使能TIM3预装载ARR

TIM_Cmd(TIM3,ENABLE);//使能定时器

}

void TIM3_IRQHandler()
{

if(TIM_GetITStatus(TIM3,TIM_IT_CC1)==SET)
{
led3=!led3;
TIM_SetCompare1(TIM3,200);
countA++;
if(countA>100)
{
countA=0;
}

}
TIM_ClearITPendingBit(TIM3,TIM_IT_CC1);
}
以上代码，请大神分析下，为什么我的中断没有执行

[linux菜鸟小余]

中断分组了设置了吗？看看

[小杨电子]

找到原因了，映射没有打开