TIM6不进中断(换成TIM4就能进中断)

只看该作者 · 2013-9-26 20:16

BOOL TimersInit( USHORT usTim1Timeout50us )
{
            TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
            NVIC_InitTypeDef NVIC_InitStructure;

            uint16_t PrescalerValue = 0;
            RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);

            PrescalerValue = (uint16_t) (SystemCoreClock / 20000) - 1;

            TIM_TimeBaseStructure.TIM_Period = (uint16_t) usTim1Timeout50us;
            TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
            TIM_TimeBaseStructure.TIM_ClockDivision = 0;
            TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

            TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure);

            TIM_ARRPreloadConfig(TIM6, ENABLE);

            NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

            NVIC_InitStructure.NVIC_IRQChannel = TIM6_IRQn;
            NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
            NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
            NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
            NVIC_Init(&NVIC_InitStructure);

            TIM_ClearITPendingBit(TIM6,TIM_IT_Update);

            TIM_ITConfig(TIM6, TIM_IT_Update, DISABLE);

            TIM_Cmd(TIM6,  ENABLE);
            return TRUE;
  }

void TIM6_IRQHandler(void)
{
            if (TIM_GetITStatus(TIM6, TIM_IT_Update) != RESET)
            {

                     TIM_ClearITPendingBit(TIM6, TIM_IT_Update);

                     prvvTIMERExpiredISR( );
            }
}

上面是TIM6的定时中断，就是进不了中断
芯片用的是STM32F103VCT6

但是把TIM6换成TIM4,就能进中断了，哪位帮我看看