void TIM3_IRQHandler(void)
{
        if(TIM_GetITStatus(TIM3,TIM_IT_Update)==SET)
        {
        TIM_Cmd(TIM3, DISABLE);
  TIM_Cmd(TIM2, DISABLE);
                delay_ms(8);
               
        }
        TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
TIM_Cmd(TIM3, ENABLE);
  TIM_Cmd(TIM2, ENABLE);
}
//TIM14 PWM2¿·Ö3õê¼»ˉ
//PWMêä3ö3õê¼»ˉ
//arr￡o×Ô¶ˉÖØ×°Öμ
//psc￡oê±ÖóÔ¤·ÖÆμêy
void TIM14_PWM_Init(void)
{                                                          
        //′Ë2¿·ÖDèêÖ¶ˉDT¸ÄIO¿úéèÖÃ
        GPIO_InitTypeDef GPIO_InitStructure;
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;
        NVIC_InitTypeDef   NVIC_InitStructure;

  /* TIM2, TIM3 and TIM4 clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3
                       , ENABLE);

  /* GPIOA, GPIOB and GPIOC clocks enable */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOC, ENABLE);

  /* GPIOC Configuration: PC6(TIM3 CH1) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* GPIOA Configuration: PA0(TIM2 CH1) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_Init(GPIOA, &GPIO_InitStructure);


  /* Connect TIM pins to AF2 */
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_TIM3);
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource0, GPIO_AF_TIM2);

        TIM_TimeBaseStructure.TIM_Period = 255;
  TIM_TimeBaseStructure.TIM_Prescaler = 0;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  TIM_TimeBaseStructure.TIM_Period = 4;
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);


  /* Master Configuration in PWM1 Mode */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 64;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

  TIM_OC1Init(TIM2, &TIM_OCInitStructure);

  /* Select the Master Slave Mode */
  TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable);

  /* Master Mode selection */
  TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);

  /* Slaves Configuration: PWM1 Mode */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 3;

  TIM_OC1Init(TIM3, &TIM_OCInitStructure);



  /* Slave Mode selection: TIM3 */
  TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Gated);
  TIM_SelectInputTrigger(TIM3, TIM_TS_ITR1);

  NVIC_InitStructure.NVIC_IRQChannel =TIM3_IRQn;//ía2¿ÖD¶Ï0
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;//ÇàÕ¼óÅÏ輶0
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;//×óóÅÏ輶2
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//ê1Äüía2¿ÖD¶Ïí¨μà
  NVIC_Init(&NVIC_InitStructure);//ÅäÖ
        TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
  /* TIM enable counter */
  TIM_Cmd(TIM3, ENABLE);
  TIM_Cmd(TIM2, ENABLE);

                                                                                  
}  

发送PWM的部分是正常的，加中断的目的是为了产生一定数量的脉冲后停止PWM，然后等待一段时间再开始，但是现在好像没法进入中断是为什么