STM32F051 不进刹车中断，谁帮我看看，谢谢！

只看该作者 · 2013-7-24 19:24

使用了6路PWM驱动电机，使能了刹车功能，也开启了刹车中断允许，还开起了EXTI_IMR 和 EMR 刹车信号输入后，PWM波形全部消失，进入刹车状态。就是不进中断，烦死了。

/*主输出能使刹车能使高电平刹车空闲状态无论定时器运行与否均起效,死区时间2.5us 120*1/48us*/
TIM1->BDTR = 120|(TIM_BDTR_MOE | TIM_BDTR_OSSI | TIM_BDTR_OSSR | TIM_BDTR_LOCK_1) | TIM_BDTR_BKE ;
/*TIM1 自动重载向上计数*/
TIM1->CR1 = TIM_CR1_ARPE | TIM_CR1_CEN;

//TIM1->EGR = TIM_EGR_BG;
EXTI->IMR |= 0X2000;                   //开启Exti 13
EXTI->EMR |= 0X2000;                //开启Exti 13
TIM1->SR &= (!TIM_SR_BIF);
TIM1->DIER= TIM_DIER_BIE;    //开启刹车中断允许

TIM_CtrlPWMOutputs(TIM1, ENABLE);

void TIM1_BRK_UP_TRG_COM_IRQHandler(void) //中断函数
{
   TIM1->SR &= (!TIM_SR_BIF);
}